REX RF20S User manual

OPERATION MANUAL
Date of purchase: Year Month
Distributor:
Be sure to read this
Operation Manual before
using the product.
- Note -
- Be sure to hand this operation manual to the user.
- To ensure safe and efficient use, read the manual thoroughly
before using the product.
- Be sure to keep the manual where the operator can refer to
it
whenever necessary.
COPPER TUBE TOOL
RF20S RT20S
STAINLESS FLEXIBLE TUBE TOOL
ORIGINAL INSTRUCTIONS

Thank you for purchasing a REX product.
Our product will give you years of reliable service if you simply follow the instructions in this manual carefully.
Before using the product , therefore, make sure you read the manual from start to finish,
paying particular
attention to the Safety Considerations on pages 2 - 4 and Precautions on pages 5 - 7.
To avoid accident
and injury, never use for any purposes other than those described in this manual.
Should you need further advice, contact your distributor or REX Industries Co., Ltd.
CONTENTS
General Safety Warnings for Power Tools ............................................................. 1
Safety Considerations
................................................................................................................... . 2
Precautions for using RF20S/RT20S
.......................................................................... 5
Precautions for using the charger/battery
.............................................................. 6
Main Parts, Specifications for RF20S
..................................................................... . 8
Main Parts, Specifications for RT20S
...................................... . ............................... 9
Standard Accessories, Use
.......................................................................... . ..................... . 10
Operation Guide
................................................................................................................................ 11
Getting Ready
- Charging the battery
......................................................................................................... 11
RF20S: Flaring copper tube
(1) Cutting and scraping the tube
.......................................................................... 12
(2) Clamping the tube
..................................................................................................... . 13
(3) Flaring
..................................................................................................................................... . 15
(4) Removing the tube
.......................................................................................................... 16
RT20S: Flanging
(1) Cutting flexible tube
.................................................................................................... 17
(2) Setting the clamp
...................................................................................................... . 17
(3) Flanging
................................................................................................................................. 18
- Replacing the flaring or flanging cone
.......................................................... 19
Maintenance and Care
............................................................................................................. 20
Servicing and Repairs
................................................................................................................ 20
Before Asking for Repairs or Servicing
........................................................................ 21
-Troubleshooting (RF20S)
............................................................................................... 21
-Troubleshooting (RT20S)
............................................................................................... 22
-Troubleshooting (RF20S/RT20S)
......................................................................... 22
-Troubleshooting (Charger RF20SC)
................................................................. 22
Optional Accessories for RF20S
......................................................................................... 23
Optional Accessories for RT20S
......................................................................................... 24
Definitions of and
In this operation manual, warnings are divided into and .
: indicates actions which could possibily result in death or severe injury to the user
if the product is used incorrectly.
: indicates actions which could possibly result in injury to the user, or physical
damage, if the product is used incorrectly.
Even items labelled  could have serious results under certain conditions.
Be sure to observe these warnings carefully as they greatly affect safety.
- If this operation manual is lost or damaged, you can download a copy from our website; http://www.rexind.co.jp
- Parts and specifications are subject to change without prior notice, due to improvements in quality,
performance or safety standards. In such cases, the contents, photographs, illustrations etc. in this
manual may be different to the product you have purchased.
WARNING
WARNING
CAUTION
CAUTION
WARNING CAUTION
CAUTION

General Safety Warnings for Power Tools
Read all safety warnings and all instructions. Failure to follow the warnings and instructions
may result in electric shock, fire and/or serious injury. Save all warnings and instructions for
future reference! The term "power tool" in the warnings refers to your mains-operated (corded)
power tool or battery-operated (cordless) power tool.
1. Work area safety.
- Keep the work area clean and well lit. Cluttered or dark areas invite accidents.
- Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust.
Power tools create sparks which may ignite the dust or fumes.
- Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
2. Electrical safety
- Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with
earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric shock.
- Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators.
There is an increased risk of electric shock if your body is earthed or grounded.
- Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
- Do not mistreat the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep the cord
away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock.
- When operating a power tool outdoors, use an extension cord suitable for outdoor use. Using a cord suitable for
outdoor use reduces the risk of electric shock.
- If operating a power tool in a damp location is unavoidable, use a residual current device (RCD) protected supply.
Use of an RCD reduces the risk of electric shock.
3. Personal safety.
- Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power
tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while
operating power tools may result in serious personal injury.
- Use personal protective equipment. Always wear eye protection. Protective equipment such as a dust mask, non-skid
safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries.
- Prevent the product from starting up unintentionally or unexpectedly. Ensure the switch is in the off-position before
connecting to a power source and/or battery pack, picking up or carrying the tool. Carrying power tools with your
finger on the switch or energising power tools that have the switch turned on invites accidents.
- Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a
rotating part of the power tool may result in personal injury.
- Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in
unexpected situations.
- Dress appropriately. Do not wear loose clothing or jewellery. Keep your hair, clothing and gloves away from moving
parts. Loose clothes, jewellery or long hair can be caught in moving parts.
- If devices are provided for the connection of dust extraction and collection equipment, ensure these are connected
and properly used. Use of dust collectors can reduce dust-related hazards.
4. Power tool use and care.
- Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job
better and safer at the rate for which it was designed.
- Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with
the switch is dangerous and must be repaired.
- Disconnect the plug from the power source and/or the battery pack from the power tool before making any
adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of
starting the power tool accidentally.
- Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or
these instructions to operate power tool. Power tools are dangerous in the hands of untrained users.
- Maintain power tools regularly. Check for misalignment or jamming of moving parts, breakage of parts and any
other condition that may affect the power tool’s operation. If damaged, have it repaired before use.
Many accidents are caused by poor maintainance.
1
WARNING

General Safety Warnings for Power Tools
2
- Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to
jam and are easier to control.
- Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into account the
working conditions and the work to be performed. Using the product for anything other than its intended use can
result in a hazardous situation.
5. Battery tool use and care.
- Recharge only with the charger specified by the manufacturer. A charger that is suitable for one type of battery
pack may create a risk of fire when used with another battery pack.
- Use power tools only with specifically designated battery packs. Use of any other battery packs may create a risk
of injury and fire.
- When the battery pack is not in use, keep it away from other metal objects such as paper clips, coins, keys, nails,
screws or other small metal objects that can make a connection from one terminal to another.
Shorting the battery terminals together may cause burns or a fire.
- Under extreme conditions, fluid may leak from the battery; avoid contact.
If you do accidentally come into contact with the fluid, flush with water. If battery fluid contacts the eyes, seek
medical help immediately.
Fluid that leaks from the battery may cause irritation or burn you.
6. Servicing
- Have your power tool serviced by a qualified repair professional, using only identical replacement parts.
This will ensure that the safety of the power tool is maintained.
Safety Considerations
1. Ensure you use the correct voltage.
- Be sure to use the voltage indicated on the name plate of the main unit or in the operation manual.
Using the product at a voltage different from that indicated can result in overheating, smoke or fire.
2. Check the switch is OFF before inserting the plug into the power supply socket.
- If the plug is inserted into the power supply when the switch is ON, the product may start operating abruptly and
is liable to cause accidents. Be sure to check the switch is OFF.
3. Be sure to avoid electric shock.
- Do not touch the plug with wet hands.
- Do not use the product in rain or in places where moisture can easily get into it.
- Be sure to ground the product to avoid electric shock.
4. Take notice of conditions at the work site.
- Do not use the product in rain, humid or damp places, or places where moisture can easily get into it.
Humidity will lower insulation of the motor and cause electric shock.
- Do not use close to flammable fluids or gases, such as gasoline and thinner. Doing so could result in fire or explosion.
- Do not install, charge, or use the product in a humid or wet place, nor expose it to rain or snow. Doing so may cause
electric shock or injury.
- Do not install, charge, use or leave the product in a hot place such as near a fire or under the scorching sun.
Doing so may result in overheating, smoke, or fire.
5. Use designated accessories and attachments.
- Do not use accessories and attachments other than those designated in the operation manual or our catalogues.
Doing so may result in accidents or injuries.
WARNING
WARNING

Safety Considerations
6. In the following cases, turn the product OFF and pull the plug out of the power supply socket.
- When the product is not in use or parts are changed, repaired, cleaned or inspected.
- When accessories are changed.
- When hazards are expected (including electric power failure).
If the product
is plugged in, it may start operating unexpectedly, causing accidents.
7. If any abnormality is noticed, stop operating the product immediately.
- If the product does not operate smoothly, or abnormalities such as unusual odours, vibration or noise are detected,
stop operating it
immediately.
- For safe and efficient operation, maintain the machine and keep it at its full potential. Using a machine that is not
fully operational may cause injury.
- Check symptoms against the items in the section entitled, "Troubleshooting" at the end of this manual and
observe the corresponding instructions.
Using the product continuously may result in overheating, smoke or fire, causing accident or injury.
- If it overheats or smoke is detected, do not attempt an overhaul yourself but ask for an inspection and repair.
- Be careful not to shake, drop or forcefully impact the body of the tool as it has a built-in precision mechanism.
Doing so may affect the product’s operation.
8. Keep the work site clean.
- Ensure you keep worktables and the work site in good order and well lit.
- A cluttered site and work table are liable to cause accidents.
9. Do not let unauthorised personnel near the product.
- Do not let anyone other than authorised personnel touch the product or the power cord.
- Do not let anyone other than authorised personnel enter the work site, especially children. Doing so may lead to injury.
10. Do not apply excessive force when using the product.
- To ensure safe and efficient operation, use within the capacity of the product.
Applying force may not only damage the product but could also result in accident or injury.
- Do not use the product in any way that could cause the motor to lock, or cause smoke or fire.
11. Use the flaring/flanging tool only for its designated purpose.
- Do not use the product on tubes not specified in this manual. Using the product for any purpose other than flaring/
flanging tubes, such as fastening the tube to a joint etc., will not only damage the product and/or motor but could
also lead to accident or injury.
12. Wear appropriate clothing.
- Do not wear loose or loose-sleeved clothing, ties, jewellery such as necklaces, knitted gloves or scarves.
Do up all buttons, fasteners, etc. on the clothing you are wearing before starting work. Otherwise, you could get
caught in the rotating parts, resulting in serious accident or injury.
- When working outdoors, it is recommended that you wear rubber gloves and non-slip shoes.
Slippery gloves and shoes are liable to cause injuries.
-
Wear safety caps, safety shoes, safety glasses, dust masks, protective noise-reduction equipment etc. according to
the working environment.
- Do not wear scarves, and cover long hair with caps or hair nets to prevent them getting caught in rotating parts.
13. Do not work in an unnatural posture.
- Keep a firm footing and balance to avoid falling over and injuring yourself.
14. Remove tools used for inspection such as wrenches.
- Before turning the switch ON, check that tools used for inspection and adjustment have been removed.
Failure to pay attention to this may result in an accident or injury.
3
WARNING

Safety Considerations
15. Operate the product with great care.
- Always pay great attention to how you handle and operate the product and to the surrounding conditions.
Carelessness may result in accident or injury.
- Do not operate the product when concentration is lowered such as when tired, after drinking alcohol, when sick,
or affected by medication, etc.
- Use common sense. Irrational behaviour can cause accidents and injuries.
16. Do not handle the power cord carelessly.
- Do not carry the product by the cord, or pull the plug out of the socket with the cord.
- Do not place the cord near heated objects, fats & oils, or cutters and other objects with sharp edges.
- Take care not to tread on the cord, pull the cord or apply unnecessary force resulting in damage to the cord.
Electric shock or short-circuit may occur, causing fire.
17. Perform careful maintenance daily.
- When changing accessories and parts, follow the operation manual carefully.
- Keep parts used for gripping the product dry and clean, and free of oil and grease.
If oil or grease remains on the product, it may slip and cause injury.
- Periodically inspect the power supply cord and plug. If damaged, ask the store where you bought them or a REX
distributor for repairs. If you leave them as is, you may get an electric shock, or a short circuit may cause a fire.
- If an extension cord is used, inspect the cord periodically and, if damaged, replace it.
If you leave as is, there is a danger of electric shock, short circuit or fire.
- If extension cords are used outdoors, use extension cords designed for outdoor use to prevent electric shock,
short-circuit or fire.
18. Check for damaged parts.
- Before using the product, carefully inspect the external appearance of the product and other parts for damage,
and make sure that it operates normally and can perform its intended functions.
- Inspect the product for any abnormalities such as in adjustment of movable parts, tightening, damage to parts, etc.
- Check the adjustment position of moving parts, tightening, damage to parts, installation and any other abnormalities.
- When replacing or repairing broken parts, follow the operation manual. If no instructions are specified in the
operation manual, ask the store where you bought the product or a REX distributor for repairs.
- Do not use the power cord or plug if damaged. If you leave them as is, there is a danger of electric shock, short
circuit or fire. Ask the store where you bought the product or a REX distributor for repairs.
- Do not use if the Stop and Start switch does not work properly.
19. Store carefully when not in use.
- Store in a dry place away from children and locked with a key.
20. For overhaul and repair, ask an appointed REX agent.
- Our products comply with corresponding safety standards. Do not remodel.
- Be sure to ask the store where you bought them or a REX distributor for any repairs.
If repairs are carried out by unskilled or unqualified personnel, the product’s performance will be adversely
affected, which may result in accident or injury.
21. Fix the object to be processed securely.
- Fix the object to be processed securely.
If it isn’t, it will not be processed correctly and may cause an accident or injury.
4
WARNING

5
Precautions for using RF20S/RT20S
1. Hold securely!
- When you switch on and the flare cone starts rotating, the hand you hold the product with may be jarred;
take care not to hit any objects around you.
- NOTE: Do not keep the trigger fixed in position deliberately.
2. Take care when working in high places!
- When working high up, make sure that there is nobody below you.
If anything falls down, it may cause an accident or injury.
3. Avoid letting the product start up unexpectedly!
- Do not carry the product with your finger on the trigger. The product may suddenly start up causing an injury.
4. Install the battery securely!
- If it is not secure, the storage battery may fall out and cause an injury.
5. Pay attention to the time it takes to process the flare!
- When the flare is processed, the clutch makes a rattling sound.
Release the trigger within 2 to 3 seconds after you hear the sound.
If the processing time is prolonged, the flare may become thinner, resulting in insufficient adhesion with the joint,
which may cause leakage. See also P14 of this operation manual.
1. The charger is for exclusive use with REX original products only!
- When charging the battery, use the exclusive battery charger only and none other.
Never use the charger for any other rechargeable tool or battery.
The use of any other combination of battery and charger can be dangerous. Never do so.
2. When charging, do not use transformers such as a booster or the like!
- Doing so will damage the charger. Use an electrical supply of the specified stated voltage only.
3. Cannot be used with a generator or with direct current!
- Never use with a generator or with direct current. Doing so may cause a fire, which will damage the charger.
4. Always charge indoors!
- Take care to prevent the battery and charger from getting wet; always charge indoors.
- Keep away from fire.
- Do not use near inflammable materials.
- When charging, the battery and charger may get fairly hot; keep out of direct sunlight and charge in a well-ventilated room.
5. Humidity can lead to accidents!
- Do not use in the rain, in humid conditions, or where it is wet. Humidity can result in an electric shock.
Humidity should also be avoided as it can weaken the charger or the motor’s insulation.
1. The flanging tool RT20S is designed exclusively for making flanges on SUS304, SUS316L
flexible stainless steel water tubes. Do not use for any other purpose.
2. Use for water tubes only. Never use for paraffin or gas tubing.
3. Make sure clamps and tubes are mounted securely or else they could come apart,
resulting in accident or injury.
Precautions for using the charger/battery
CAUTION
WARNING
WARNING

6
Precautions for using the charger/battery
6. When charging is complete, remove the battery and pull out the plug!
- When charging is complete, remove the battery from the charger and remove the plug from the mains.
Also, be sure to remove the plug if there is a power cut.
7. Charge within a range of 10 to 40ºC!
- The charger has a special circuit for rapid charging - approx. 1 hour, it should be used within an ambient temperature
of between 10 and 40ºC. The battery’s built-in protection system does not allow charging outside this range.
8. Do not use the same charger continuously!
- Using the same charger continuously can cause it to overheat, resulting in an accident.
After use, remove the plug and allow the charger to cool down for approximately 15 minutes before using again.
- When charging twice in a row, allow the charger to rest for more than 15 minutes to cool down before charging again.
When charging 3 or more times consecutively, allow to rest for more than 1 hour and then charge again when the
charger has cooled down.
9. Do not charge the battery straight after a rapid discharge!
- Even after placing in the charger, the red LED may flash on and off slowly indicating that it is not yet possible to
charge, or fully charge, a battery that is still hot after continuous use, etc.
Wait until the battery has cooled down before charging again.
10. Do not charge for more than 2 hours!
- If the green LED does not start blinking after charging for about 2 hours stop charging; the LED might possibly be
malfunctioning.
11. Charge every 3 to 6 months!
- Even if you do not use the battery for a while, we recommend charging it every 3 to 6 months to prevent over discharge.
12. Do not keep fully charged for long periods of time!
- If you keep the battery for a long period, every 3 to 6 months store it at normal temperature and 40 to 80% charged.
Be sure to remove the battery from the unit or the charger.
13. Never insert any foreign object into the battery slot in the charger!
- There are terminals located inside the slot.
If you insert metal, water or other foreign objects into the slot, it will cause a short and cause the charger to break down.
14. Do not disassemble the charger or battery!
- Never disassemble the battery; it contains a special built-in device for rapid charging - approx. 1 hour.
You will damage the unit if you try to disassemble it.
- The charger has a built-in condenser and other electronic parts; disassembling the unit will lead to electrical shock
and damage.
- If either the charger or battery unit does not function properly,do not disassemble to attempt a repair yourself.
Always return to the store where you bought them or to a REX distributor for repair.
15. Do not short circuit the battery!
- The battery has a very low internal resistance.
If it shorts, there will be high current and the unit will overheat resulting in it burning or breaking down.
16. Never throw a battery in a fire!
- If you throw a battery in a fire, it may explode. Do not throw in a fire, incinerator or the like.
17. Do not insert any foreign body into the air vents in the charger!
- If anything metallic or any inflammable material gets into the vents, it can cause an electric shock and damage the unit.
Use in as dust-free a location as possible.
WARNING

7
Precautions for using the charger/battery
18. If any abnormality arises, stop charging at once!
- If you notice any abnormality such as overheating or an unusual smell, stop charging immediately and send the unit
for repair.
19. Take care when storing the charger!
- Always store where the ambient temperature is under 40ºC, and out of the reach of children.
- Store in a dry place away from the rain so as to reduce deterioration of the unit’s insulation and to prevent electric shock.
20. Recycling Lithium-ion batteries you no longer need
- Never throw away unwanted lithium-ion batteries together with ordinary household garbage.
Wrap the terminals in insulating tape to prevent a short, and dispose of in accordance with local laws and regulations
governing such items.
21. Product Shipping Notice!
- If this product is to be transported by sea as a non-hazardous material, it must comply with SP188 of the “UN
Recommendations on the Transport of Dangerous Goods”. Contact your shipping company for details.
22. To prevent the charger and battery from emitting smoking, overheating, igniting or the
battery fluid leaking, always comply with the following:
a) Do not use the charger or battery if they have been dropped or have undergone a hard impact.
b) Do not allow metal objects and the like to come into contact with the terminals.
c) When storing the units, keep them away from metal objects (screws, nails, coins etc.).
d) Do not leave, charge or use the charger or battery near a fire, under strong sunlight, or where the temperature is very high.
e) Do not use a battery if it has visible external damage or has become deformed.
f ) Never place in a microwave oven or high pressure vessel; do not expose to high temperatures or pressure.
23. If you think something is wrong, stop immediately.
- If the battery fluid is leaking or you notice a bad smell, immediately keep away from any nearby fire or source of heat.
- While using, charging or even storing the battery, if you notice any bad smell, overheating, change of colour or shape,
or any other abnormality you have not seen before, remove it from the tool or charger immediately.
- If any leaked battery fluid gets in your eyes, do not rub your eyes with your hands. Immediately wash with clean tap
water, and then go directly to the doctor’s for treatment. Failure to do so could lead to serious damage to your eyes.
- If any leaked battery fluid gets on your skin or clothing, wash with clean tap water immediately. Such discharge can
cause severe skin irritation.
24.Cautions when charging the battery.
- The battery is not charged when you purchase the product, so you will need to charge it.
Sometimes, it may be difficult to fully charge a new battery, or one that has not been used for a long time.
In such cases, repeat charging and discharging the battery a few times to restore it to its full capacity.
- The battery will be hot immediately after using the tool. Leave it to cool for a little before recharging.
- If the red LED goes out straight after you start charging, remove the battery from the charger, wait until the temperature
is within a range of 10 to 40ºC and start again. This is the range within which the battery can be charged.
If it still doesn’t work after several attempts, then it means that the battery has reached the end of its life or is out of order.
- If you charge the battery outside the 10 to 40ºC range, the red LED will flash on and off indicating the battery cannot
be charged. However, the charger will start charging automatically once the battery is within the correct temperature
range.
WARNING

Main Parts, Specifications for RF20S
Main Parts
(Flaring tool RF20S)
Specifications
Green
lamp
FWD/REV
switch
Flaring cone
Trigger
Flaring tool
Lithium-ion
battery
Latch
Charger
Battery
mounting socket
Ventilation hole
Red
lamp
Power cord
Hex key Carrying case
OPERATION MANUAL
Be sure to read this
Operation Manual before
using the flaring/flanging tool.
- Note -
- Be sure to hand this operation manual to the user.
- Toensure safe and efficient use, read the manual thoroughly
before using the flaring/flanging tool.
- Be sure to keep the manual where the operator can refer to
it
whenever necessary.
COPPER TUBE TOOL
RF20S RT20S
STAINLESS FLEXIBLE TUBE TOOL
Date of purchase: Year Month
Distributor:
Operation manual Fig. 
Table 
Strap
Applicable tube
Applicable tube size
Flare
Processing method
Switches
Cone speed
Power
Potential No. of flares
Processing time
Vibration*
Uncertainty (K)*
Eccentric cone (constant-pressure plunge rotation)
Stepless speed control trigger and FWD/REV switch
0 - 280/min-1 (rpm)
DC motor
½": Approx. 100 tube ends per fully charged battery.
(May vary depending on usage.)
Approx. 5 sec.
0.667 m/s2
1.5 m/s2
Copper tube (O/OL material) JIS H 3300 C1220T
Supports Class 2 refrigerant (Supports R410A, R32) ࠉ
Complies with shapes described in JIS B 8607. (Referred to elsewhere.)
Nominal diameter
Outer diameter (mm) 6.35 9.52 12.70 15.88 19.05
¼" Ǫ ½" ¾"**
Clamp with liner
**May be sold separately.
8
*Warning: The vibration emission during actual use of the power tool can differ from
the declared total value depending on the ways in which the tool is used.
Hex socket
button head
screw
(M4 x 8)
Clamp liner
Stopper plate
ǫ

9
Applicable tube
Applicable tube size
No. of flange threads
Processing method
Switches
Cone speed(min-1 /rpm)
Power
Potential No. of flanges
Processing time
Vibration*
Uncertainty(K)*
Green
lamp
Flexible stainless steel water tube
SUS304, SUS316L（for mains water supply）
Ｍ-13 (½") Outer diameter 16.7- 16.8mm
Ｍ-15 (¾") Outer diameter 20mm
2 or 3 threads
Eccentric cone (constant-pressure plunge rotation)
Stepless speed control trigger and FWD/REV switch
0 -280/min-1 (rpm)
DC motor
¾" (3 threads): Approx. 100 tube ends per fully charged battery.
ࠉࠉࠉࠉࠉࠉ(May vary depending on usage.)
Approx. 5 sec.
0.667 m/s2
1.5 m/s2
FWD/REV
switch
Flanging cone
Trigger
Fig. 2
Table 2
Flanging tool
Strap
Lithium-ion
battery
Latch
Charger
Battery
mounting socket
Ventilation hole
Red
lamp
Power cord
Clamp (with liner)
Hex key Carrying case
Operation manual
Clamp liner
(Flanging tool RT20S)
Main Parts, Specifications for RT20S
Main Parts
Specifications
*Warning: The vibration emission during actual use of the power tool can differ from
the declared total value depending on the ways in which the tool is used.
OPERATION MANUAL
Be sure to read this
Operation Manual before
using the flaring/flanging tool.
- Note -
- Be sure to hand this operation manual to the user.
- Toensure safe and efficient use, read the manual thoroughly
before using the flaring/flanging tool.
- Be sure to keep the manual where the operator can refer to
it
whenever necessary.
COPPER TUBE TOOL
RF20S RT20S
STAINLESS FLEXIBLE TUBE TOOL
Date of purchase: Year Month
Distributor:
Hex socket
button head screw
(M4 x 8)

RF20S Flaring/RT20S Flanging tool
Battery
Charger (without power supply cord)
Power cord
Clamp (with ¼" liner)
Clamp (with
Ǫ " liner) *RF20S only
Clamp (with ½" liner)
Carrying case
Hex key (Diameter: 2.5 mm)
Operation Manual
1,220
(1,405)
185
1,600
335
85
4
Table 3
Table 6
REX Lithium-ion battery RF20SB (No. 424982)
AC100 - 240 V (50/60Hz) 60 VA
Constant current and constant voltage system
DC 10.8V
2000 mA
0 - 40ºC
Overcharge protection (4.25 V/cell)
Overcurrent protection (7A fuse)
Battery type
Voltage
Charging system
Charging voltage
Charging current
Chargable temperature
Circuit protector
Table 5
Charger : Model RB20SC
Standard Accessories (Size / Weight)
18 × 63 × 3
146 × 109 × 61
60 × 54 × 85
210 × 145 × 2
131 × 66 × 230 (131 × 66 × 264)*
*with batteries inserted
440 × 366 × 113
84 × 84 × 45
2000 (cord length)
30
Approx.
350
1
1
1
1
1
1
1
1
1
1
1
2
3
4
5
6
7
8
9
10
Size (W x D x H mm)Weight(kg)Qty.
- RF20S: Flaring copper tube. Flanging flexible stainless steel tube. (requires flanging tool
set 424980 sold separately; refer to Page 23, Fig. 43).
- RT20S: Flanging flexible stainless steel tube.
Standard Accessories, Use ( For RF20S/RT20S )
Use
Table 4
Sound pressure level at operator’s position
Noise level
Uncertainty (K)
81.5 dB (A)
92.5 dB (A)
3 dB
Lithium-ion battery
DC10.8 V
1500 mAh
Approx. 60 minutes (depending on use)
㸨Charge is approx. 80㸣complete in first 30 min.
Approx. 500 times (depending on use)
0 - 40ºC
Over-discharge protection
(Discharging stops when any one cell is reduced to 2.5 V)
Temperature protection
(Battery cannot be charged below 0ºC or above 40ºC.)
Battery type
Voltage
Capacity
Charging time
No. of recharges
Chargable temperature
Circuit protector
Battery : Model RB20SB
10
Name

11
Mark
Green lamp
Red lamp Charger status
Flashes
slowly
Off
Flashes
quickly
On
Off
On
Off
On
Off
Off
On
Chargeable
Charges the battery 0 - 80% of its capacity (about 30 minutes)
Charges the battery 80 - 100% of its capacity (about 30 minutes)
Fully charged
The temperature of the battery is outside the chargeable range (below 0㽅㻯, or above 40㽅㻯)
Unable to charge (Defective battery etc.)
2. Connect the power cord and charger, and then insert
the plug into the mains.
Check that the green lamp is slowly flashing on and off.
This indicates that the battery is being charged. (Fig. 4)
3. Insert the battery as far as it will go into the mounting
on the charger. (Fig. 5)
The red lamp indicates that charging has started.
After approximately 30 minutes, the green lamp starts
flashing on and off quickly (indicating it is 80%
charged).
The battery is fully charged when the lamp stops
flashing but remains on. A full charge takes about 60
minutes in total. (Fig. 5)
You can check the status of the battery and charger
from the red and green lamps. (Table 7)
- Hold the main unit firmly and remove the battery.
- Charge the battery once the tool starts to lose power.
80%
CAUTION
CAUTION
Charging the battery
1. Remove the battery from the main unit by pressing the
latch on the battery. (Fig. 3)
- Note: The input voltage is AC100 - 240 V (50/60Hz).
- Do not use a generator to charge the battery.
- Do not carry the charger with the power cord; it may
drop off.
Flashes
slowly
( For RF20S/RT20S ) Operation Guide
Green lamp
Red lamp
Green lamp
Plug
Power cord Charger
Battery
mounting socket
Battery
Battery
Main unit
Latch
Fig. 3
Fig. 4
Fig. 5
Getting Ready:
Table 7

12
- Ensure the battery is attached the correct way round.
- Charge in a place where the temperature is within the
chargeable range of 10°C to 40°C.
If you charge outside this range, it may degrade the
performance and life of the battery and may even
cause a leakage or generate excessive heat.
- The battery or the charger may get slightly hot during
charging; choose a dry and well-ventilated place that
is not exposed to direct sunlight.
- If you intend to charge another battery, leave the
charger to cool for at least 15 minutes before charging
the next one.
- If the temperature of the battery is below 10°C or above
40°C, you cannot charge it.
Operation Guide ( For RF20S/RT20S )
CAUTION
CAUTION
Battery
Latch
Main unit
Fig. 6
Knob: about 1/8th
of a turn
Mark for cutting
2 or 3 rotations
back and forth;
then 1 full
rotation
Cutter: three to four rotations
About ¼ of
a turn
A
Knob
Cutter wheel
Rotate the cutter around the tube
A
Fig. 7
Fig. 8
Fig. 9
Cutting Tube
(1) Cutting and scraping the tube
1. Mark a line where you wish to cut the tube, and then
place the tube on the cutter. (Fig. 7)
* Tighten the cutter so that the blade lightly presses
against the tube.
* Cut the tube where it is least flat or bent. Tubes that
are flat or have lots of bends will affect the flare.
2. From where the cutter blade is placed on the tube,
turn the knob ¼of a turn in the direction of A in
the diagram and then rotate the unit 2 or 3 times
back and forth through 90°. Then score the tube by
turning the unit one full rotation around the tube to
make a mark for cutting. (Fig. 8)
3. When feeding the cutter blade, the knob should be
turned slowly at a rate of approximately 3 to 4
rotations of the tube cutter. (Fig. 9)
4. Remove the battery from the charger, and then attach it
to the main unit. (Fig. 6)
- If the battery cannot be fully charged even after
following the correct procedure, the battery may be
dead. Attempting to charge a dead battery may damage
the charger.
Operation Guide ( Flaring copper tube )

13
(2) Clamping the tube
1. Slide a flare nut that is compatible with the tube size over
the tube. (Fig. 12)
4. Use a scraper, reamer or file etc. to remove burrs from
the end of the tube. (Fig. 11)
CAUTION
CAUTION
CAUTION
- Hold the cut end facing downward so that metal chips
do not fall into the tube.
- If the cut end has not been properly scraped, the tube
cannot be flared properly, and a gas leak may result.
- Do not make any scratches on the inner surface of the
tube to be flared.
Damage or scratches may remain even after the tube
is flared.
- Before processing, check that the end of the copper
tube is not deformed. If it is deformed, you will not be
able to process the flare normally.
- Before processing, confirm that there are no burrs left
on or in the copper tube. If any burrs remain, the surfaces
that are flared may become dented and cause a gas leak.
- Pay attention to the direction of the flare nut.
2. Choose a clamp that is compatible with the tube size,
and then place the tube so that the end of it makes
contact with the stopper plate.
(Fig. 13)
- If there is a space between the tube and the stopper
plate, the resulting flare diameter will be smaller.
- Remove any metal chips from the liner, the flare cone
and the tube.
*To open or close the clamp, turn the knob as indicated by
the arrow. (Fig. 13)
- If you feed the blade too quickly, the tube may be
deformed and the tube cannot be flared properly.
(Fig. 10 right)
CAUTION
Preparing
the tube
Tube
Clamp
Fig. 13
Do not leave a gap
between the tube and
the stopper plate
Opening or
closing the
clamp
Remove burrs
Tube
Scraper
Fig. 11
Fig. 12
Tube
Flare nut
Hold the scraper
below the tube so
that metal chips
do not fall into it.
Fig.10
Proper cut end.
The cut end inner
diameter is the
same as the actual
inner diameter of
the tube.
Deformed cut ends .
The cut end inner
diameter is thicker
than the
actual inner
diameter
of the tube.
Inner
diameter
of the tube
OK
Cut end
( Flaring copper tube )Operation Guide

14
Operation Guide ( Flaring copper tube )
Fig. 18
*Turn the clamp knob until the clamps are closed
firmly. (Fig. 15)
Be careful to avoid gaps in the liner as they will
cause protrusions in the flare, which will result in
leakages. (Fig. 16)
*The distance between the liners is set slightly
smaller than the external diameter of the tube so
that the tube will not become loose or slip.
Therefore, when clamping the tube, the exterior of
the tube will be scratched, but this will not pose
any problem.
- If there is a large step in setting the liner then
there will also be a large step in the flare which
will cause a gas leak. (Fig. 18)
Large step Large protrusion
in the flare.
CAUTION
3. Check that the tube is placed correctly and then
clamp it. (Figs. 13-14)
- To confirm that the stopper plate is in perfect contact
with the tube, try to raise the stopper plate slightly with
your finger. If the stopper plate is easy to shift, it implies
that there is a space between the stopper plate and the
tube, so reset the tube. (Fig. 14)
Fig. 15
Fig. 16
Fig. 17
Large gap Large protrusion
in the flare.
Tighten
Clamp knob
Clamp liner
When the liner is replaced to change
sizes, secure the clamp against the
liner.
Clamp
liner
Clamp
Clamp
Fit
Fit
Hex socket
button head
screw (M4x8)
Tube
Fig. 14
Clamp
liner
Stopper plate
Set the tube in the clamp
so that the stopper plate
does not move that easily.
4.When the liner is replaced to change sizes, be
sure to fit the new liner properly in the clamp
before securing it with the socket bolt. (Fig. 17)
*Secure the clamp against the liner using the 2.5 mm
hex spanner provided and a hex socket button head
screw (M4x8).

Hex socket
button head
screw (M4x8)
CAUTION

15
(3) Flaring
1. Attach the clamp, with the tube in it, to the flaring
tool. (Figs. 19-20)
*Attach the clamp to the flaring tool by aligning the
joints on the clamp with the recesses in the flaring
tool, and then turn the flaring tool in the direction of
the arrow until you hear a click. (Fig. 20)
2. Start flaring by pressing FWD on the FWD/REV
switch and pull the trigger.
The amount you pull the trigger affects the rotation
speed, but you should pull the trigger back all
the way.
If you don’t pull the trigger back enough, there
may not be enough torque.
Flaring should be completed within 3 seconds
from when you hear the clutch make a clanking
sound.
Release the trigger to stop the tool rotating.(Fig. 21)
- You cannot set the clamp unless the flare cone is
fully retracted.
- When the cone is out, press REV on the FWD/REV
switch and then pull the trigger.
The flare cone will retract while rotating in reverse.
When the flare cone is fully retracted, you will hear
a clank; release the trigger. (Fig. 20)
- Remove any foreign matter (metal chips, etc.) from
the flare cone, as these could cause scratches on
the inner surface of the flare or a gas leak.
- If the time for idling (from when the clutch starts
operating until you release the trigger) is too short,
it may sometimes result in insufficient flaring.
- If the time for idling is too long, it may cause a gas
leak resulting from a protrusion or steps in the flare’s
exterior (refer to page 13.), or reduce the thickness
of the flared tube.
( Flaring copper tube )Operation Guide
CAUTION
CAUTION
Need to
operate
the switch
Forward Reverse
FWD/REV
switch Trigger
Attaching the clamp
flare
cone
Recesses
Flaring
tool
Tube
Fig. 19
Notch Recesses
(Protrusion)
Clamp
Front: Flaring tool
Fig. 20
Fig. 21

16
Tightening torque (Nm)
Actual outer
diameter (mm)
Nominal
diameter
Points to note when connecting flare nuts on refrigerant tubes
- Note the following when connecting flared nuts.
1. When connecting a flare nut, coat the thread and taper part
of a flare joint with refrigerating machine oil and make the
first 3 or 4 turns of the nut by hand.
2. Use Table 8 opposite as a guide to the torque that should
be applied when connecting a flare nut.
3. To prevent gas leaks, ensure the nut is tightened correctly.
Scratches on inner
surface of flared tube.
14 -206.35
40 -449.52
57 -6212.70
70 -7715.88
98 -12019.05
- If you use the tool when the battery is low, it may stop during processing or retracting.
If you feel that the power is getting weaker, charge the battery as soon as possible.
3. Press and hold down REV on the FWD/REV switch.
- The flare cone will be retracted while rotating in reverse.
The amount you pull the trigger affects the rotation speed, but you should pull the trigger back all
the way.
If you don’t pull the trigger back enough, there may not be enough torque.
When you hear the clutch make a clanking sound, release the trigger to stop the flaring tool
rotating.
(4) Removing the tube
1. Detach the clamp from the flaring tool by reversing
the steps for installation. (Fig. 22)
CAUTION
CAUTION
Fig. 22
Fig. 23
Fig. 24
Table 8
Ǫ
½"
¼"
¾"
“Tightening torque used for connecting
flare nuts (JIS B 8607) ”
Operation Guide ( Flaring copper tube )
- The clamp cannot be removed unless the flare cone is
fully retracted. Avoid removing it forcibly, otherwise the
tool may be damaged.
2. Removing the tube
- Loosen the knob to open the clamp, and then
remove the tube. (Fig. 23)
*Check the shape and dimensions of the finished
flare are acceptable. (Fig. 24) .
For information on how to deal with each of these
cases, refer to Troubleshooting. (Pg. 21)
*Check that there are no foreign bodies such as
chips or oil on the processed pipe. If there are,
remove with a clean, dry cloth.
Removing the tube
Removing the clamp
Flaring tool
Clamp
Clamp
(1)
(2)
(3)
Knob
Tube
Small flare
diameter
Large flare
diameter Large protrusion on outer
surface of flared tube.
Large step on outer
surface of flared tube.
5
8 "

(
Flanging )Operation Guide
(1) Cutting flexible tubes (Figs. 25,26)
1. Rotate the grip anticlockwise and retract the cutter blade to
fit the flexible tube to be cut.
2. Turn the grip clockwise so that the cutter blade fits into the
centre of the recess of the flexible tube, and feed in the cutter.
3. From where it contacts the recess of the flexible tube ridge,
turn the grip approx. 1/6 to the right, feed in the blade, and
rotate the cutter a few turns in the direction shown in the figure.
4. After that, cut the pipe in the same way (turn the grip to the
right about 1/6 turn, then rotate the cutter 2-3 turns).
5. Check that there are no burrs or deformation where the tube
has been cut.
If there are, then normal flanging will not be possible, which
could result in leakages. (Fig. 26)
(2) Setting the clamp (Figs. 27-28)
1. Set the clamp so that you place the liner over the second or
third groove from the end of the tube.
2. Lift the handle and tighten by turning in a clockwise direction.
3. While looking from the side, check that the end of the tube
does not protrude from the clamp.
- If the end of the tube protrudes beyond the clamp, the
clamp cannot be set on the flanging tool.
If the end of the tube protrudes beyond the clamp, the
position of the clamp is incorrect. Correct the position of
the clamp.
If the end of the tube is deformed and protrudes beyond
the clamp, cut off the deformed section of the tube and
attach the clamp again.
CAUTION
Fig. 26
OK
Burrs
Fig. 27
1. Place the
nut on the
tube.
2. Place the clamp in
the 2nd or 3rd
groove.
3. Lift up the
handle
and
tighten.
Clamp Avoid letting the end
of the tube protrude
beyond the clamp.
Fig. 28
17
Fig. 25
Cutter
wheel
Cutter
wheel
Set the cutter wheel
in the centre of the
recess of the tube.
Roller Flexible tube
Flexible
tube
cutter
Rotate
cutter
Support
roller
Grip: 1/6th of a turn
Operation Guide ( Flanging )
OK

18
Operation Guide ( Flanging )
(3) Flanging (Figs. 29-31)
1. Attach the clamp, with the tube in it, to the flanging
tool. (Figs. 29-31)
*Attach the clamp to the flanging tool by aligning the
joints on the clamp with the recesses in the flanging
tool, and then turn the flanging tool in the direction of
the arrow until you hear a click. (Fig. 29)
2. To start flanging, press FWD on the FWD/REV
switch and pull the trigger.
The amount you pull the trigger affects the rotation
speed, but you should pull the trigger back all the
way.
If you don’t pull the trigger back enough, there may
not be enough torque.
Flanging should be completed within 3 seconds from
when you hear the clutch make a clanking sound.
Release the trigger to stop the tool rotating. (Fig. 30)
3. Press and hold down REV on the FWD/REV switch
and pull the trigger.
The flanging cone will retract while rotating in
reverse.
As in 2 above, the amount you pull the trigger can
affect the rotation speed, but you should pull the
trigger back all the way.
If you don’t pull it back enough, there may not be
enough torque.
Release the switch to stop the tool rotating.
4. Remove the clamp in the reverse order to attaching it.
5. Make sure the tube has been flanged correctly.
*If it hasn’t, it can lead to water leaks or electrolytic
corrosion. (Fig.31)
*Make sure that the processed tube is free of foreign
bodies such as chips and/or oil.
If there are any, remove with a clean, dry cloth.
Attach the clamp
Tube
Flanging
tool
Need to
operate
the switch
Forward Reverse
FWD/REV
switch
Trigger
Inadequate
flanging
Fig. 29
Fig. 30
Fig. 31-1 Fig. 31-2
OK