Unimax 80202 User manual

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WARRANTY CARD
Product: RECIPROCATING HAND SAW 820 W STORM
Type: 80202
Date of manufacture:
Date of sale, stamp, signature:
Serial number (product series):
Repair centre notes:
Without the correctly filled warranty card or without proof of purchase receipt, including
the product type (invoice, purchase receipt) no warranty claim will be processed.
1. KH Trading machines and tools are covered by 6/24 months warranty, starting on the date of
purchase, as described in the Civil Code (proof of purchase or invoice receipt must be
enclosed with the warranty card when making a claim).
2. This warranty does not cover defects caused by unprofessional handling, machine overloads, not
complying with instructions contained in this manual, using accessories that are not approved,
unauthorized repair, regular wear and tear and damages occurred during transport. Further, this
warranty does not cover parts and accessories such as the motor, carbon brushes, seals and
hot-air operated parts and parts that need to be changed regularly.
3. If the repair is to be found as not covered by the warranty policy, all costs including the repair and ship-
ping to and from the repair centre will be paid by the customer, according to valid price list. See www.
4. When making a claim, you must present the warranty card, showing the date of the purchase, the
serial number of the machine, vendor stamp and signature of sales clerk, as well as the proof of
purchase receipt.
5. Warranty claim shall be made at the vendor shop where you bought your machine or you may mail
it to a service centre. The vendor is obligated to fill out the warranty card (date of sale, serial
number, vendor stamp and signature). All these information must be filled in at the time of sale.
6. The warranty period will be extended for the period of time for which the machine has been in the
service centre possession. If the repair or defect is not covered by the warranty policy, all costs including
the repair and shipping will be paid by the owner of the machine / tool. We recommend sending the
machine in its original packaging. Please, also enclose brief description of the defect with the packaging.
7. Before sending the machine for repair, clean it thoroughly. If the received machine is dirty, it may
be rejected by the service shop or you may be charged a cleaning fee.
SERVICE
Logistic centre Klecany
Topolová 483
250 67 Klecany
Czech Republic
Claim department phone number: 266 190 156 T-mobile: [phone]
266 190 111 O2: 601 218 255
Fax: [phone] Vodafone: 608 227 255
http://www.KHnet.cz
Email: ser[email protected]
RREECCIIPPRROOCCAATTIINNGG
HHAANNDDSSAAWW882200WWSSTTOORRMM
USER'S MANUAL
80202

2
Dear customer. Thank you for purchasing reciprocating handsaw from KH Trading, s.r.o.
Our company is ready to offer you our services - before, during and after you buy our product.
If you have any question, comment or idea, please contact our business centre. We will do our best to address
your comment or question in timely matter.
Before first use, please read this manual carefully. It is your responsibility to study all instructions,
necessary for safe use and operation and to understand all risks that may be involved during the use
of power machines.
WARNING! Do not try to use this machine before reading this entire manual and before you know
how to handle it. Keep this manual for future reference.
Pay special attention to safety instructions. Not complying with safety rules may cause injury to the
operating person or to people standing by or it may cause damage to the machine or to the work
piece.
Pay special attention to safety notes and safety labels on the machine.
Never remove or damage them.
Please, write information such as the invoice number
and the number of the sale receipt here in this box.
Machine description
This reciprocating handsaw is designed for professional users.
The bottom support flange is made out of injection-moulded
aluminium and then polished. The flange may be tilted to both
sides. Soft handle fitting. Fine speed adjustment. The side guide
and cutting blades are not supplied with the saw. The engine
features double-insulation so you do not need to use grounded
plug.Your tool is neatly stored in plastic briefcase.
Fixing the saw blade.
The accuracy of instructions, graphs and information contained herein, depends on the printing date. Due to
continuous product improvement, the manufacturer reserves the right to change technical parameters of the
product, without prior customer notification.
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .~230V
Power input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .820 W
Saw blade stroke frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .500 - 3,000 min.-1
Stroke length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 in (26 mm)
Fixing the saw blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .bingo system Bosch
Cut depth when hold at 90°
Wood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.1 in (80 mm)
Aluminium alloy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.78 in (20 mm)
Steel - not thermally treated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.23 in (6 mm)
Pre stroke (orbital cutting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 degree adjustment
Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.9 × 14.9 × 11.6 in (125 × 380 × 295 mm)
Gross weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 kg
Net weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.3 kg
DESCRIPTION
TECHNICAL SPECIFICATION
REPAIR AND MAINTENANCE REPORT
Report and maintenance report:
DATE SERVICE SHOP REPAIR AND MAINTENANCE REPORT

REVISION REPORT
The user is obligated to perform tests and revisions of electrical equipment of the machine
in accordance with valid rules and regulations. Result report:
DATE REVISION TECHNICIAN
Number / SIGNATURE
REVISION REPORT
3
•This device may be used by a qualified person, 18 years or older who has been
trained in work and environmental safety procedures.
•Any person using this equipment must possess a medical certificate
demonstrating his eligibility to operate this equipment.
We recommend placing work safety regulations notices at your workshop:
•"Prevent the most common injuries" - HANDSAW
•"Prevent injuries" - METAL TURNING MACHINES
Symbols used in this manual
Warning!
This symbol informs you about the risk of personal injury or damage to the machine
or materials.
Caution! You are using electrically powered machine!
Electrical hazard.
Risk of being caught by spinning machine parts!
Moving machine parts may catch body parts or clothing and cause severe injury.
Warning!
Risk of damage.
Note:
Additional information.
Use personal safety gear.
General instructions
•Plastic packaging materials pose danger to children and animals.
•Make sure you know how to control your tool or machine and that you are familiar with its operating
procedure. Know the hazards that may occur, if not used correctly.
•If other person is using this machine make sure that he knows how to safely operate this equipment and
that he is familiar with hazards and risk that may occur, if not used correctly.
•Pay special attention to safety notes and safety labels on the machine. Never remove or damage them.
If the warning label becomes unreadable, please contact your vendor.
•Keep your working place clean. Dirty and disorganized workplace may cause accidents.
•Never work in tight spaces or in purely lit rooms. Make sure the floor is solid and stable and that you can
move around easily. Always keep stable posture.
•Keep focusing and use common sense. Do not continue working if you cannot pay attention.
•Maintain your tools clean and in safe working conditions.
SAFETY PRECAUTIONS

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•Handles must be kept free of grease and dirt.
•Make sure no children, unauthorized persons or animals have access to your workshop.
•Never put your hands or legs inside the working area.
•Never leave your machine unattended during operation.
•Use only for purposes for which it has been designed.
•Use personal protective gear such as safety goggles, ear protection, respirator, safe working shoes etc.
•Do not overreach, use both hands.
•Never work under the influence of alcohol or other drugs.
•Do not use the machine/tool if you feel dizzy or week.
•Any modifications or improvements to the machine are strictly prohibited. If you discover any cracks or
damages to the machine, do not use.
•Never perform any maintenance during operation.
•If you see any unusual sign or hear any strange sound, switch of the machine immediately.
•Do not forget to remove all wrenches and/or screwdrivers from the machine.
•Before use, make sure all screws are tightened securely.
•Perform maintenance regularly. Before use make sure the machine is in good working conditions and
without any damage.
•Use only original spare parts during repairs.
•Using accessories or extension pieces not approved by the manufacturer may cause injuries.
•Use this machine only for work that could be handled by it. Do not overload tools, accessories or the
machine. For large work volume use more powerful machine.
•Do not overload the machine. Measure the work load in such way, so it could be done with comfortable
speed. Damages due to machine overload are not covered by the warranty policy.
•Do not expose to extremely high temperature or direct sunlight.
•This machine is not designed for use in humid environments or under water.
•If you are not using your equipment, store it in a dry and locked place, out of reach of children.
•Before use, inspect all safety elements and make sure they work as designed. Make sure all moving parts
are in good working conditions.
•Inspect all parts for cracks and damages. Make sure movable parts are not stuck and set properly. Also take
into consideration other conditions that may have a negative effect on the proper function of your machine.
•If not stated otherwise in this manual, all damaged parts and safety elements must be repaired or changed.
Fine mechanics
•Never use a vise to hold your machine.
•Protect your machine from fall and impact. When you finish your work store your equipment back inside
the briefcase.
Assembly
•Do not use the machine unless completely assembled.
Electrical equipment
•Observe all basic safety rules when using electrical equipment to prevent risk of fire, injuries by electrical
shock and other hazards. Before using this device, read this manual entirely and follow all safety
instructions. Before using this device, read this manual entirely and follow all safety instructions.
•Make sure the power cable plug is plugged into the correct wall outlet. The voltage on the specification
label must be the same as the voltage in the wall outlet. Higer voltage may damage the engine and too
low voltage will not provide the machine with sufficient power.
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MATERIAL AND PART CHART
Position Name pc
1 Front cover 1
2 Screw M4 × 25 2
3 Elastic washer 4 2
4 Gear box 1
5 Ring 1
6 Spring 2
7 Guiding platform 1
8 Ball bearing 1
9 Slide pole 1
10 Bearing assembly plate 1
11 Elastic washer 4 2
12 Screw M4 × 20 2
13 Spring bracket 6 1
14 Washer 1
15 Screw M5 × 16 2
16 Spring 2
17 Pulley 1
18 Pulley stud 1
19 Cam 1
20 Spring bracket 3.5 1
21 Washer 1
22 Balancing piece 2
23 Toothed gear 1
24 Right carbon brush cover 1
25 Screw ST2.9 × 9.5 1
26 Screw ST4.2× 9.5 2
27 Right handle 1
28 Screw ST4.2 x 16 6
29 Screw ST4.2 x 38 1
30 Sealing ring 2
31 Clamp 1
32 Screw 1
33 Bracket ring 22 1
34 Screw M5 × 10 1
35 Bronze bearing 1
36 Ring 1
37 Elastic stud 1
38 Guiding pulley 1
39 Plate 1
40 Guiding pulley stud 2
41 Washer 2
42 Bracket ring 2
43 Safety button 1
44 Bracket ring 3.5 2
45 Front transparent cover 1
46 Wire safety pin 1
47 Screw ST4.2 x 65 2
Position Name pc
48 Guiding platform 1
49 Needle bearing 1
50 Centring shaft 1
51 Ring 1
52 Screw ST4.2 x 32 2
53 Gear box 1
54 Elastic washer 4 3
55 Screw M4 × 14 3
56 Elastic ring 1
57 Ball bearing 609 1
58 Rotor 1
59 Ball bearing 627 1
60 Bearing casing 1
61 Shock absorbing ring 1
62 Screw ST4.2 x 65 2
63 Stator 1
64 Engine housing 1
65 Specification label 1
66 Brush holder 2
67 Carbon brush 2
68 Coil spring 2
69 Coil 2
70 Screw ST2.9 x 9.5 1
71 Power cable 1
72 Bushing 1
73 Screw ST4.2 x 13 2
74 Clip 1
75 Left handle 1
76 Capacitor 1
77 Switch 1
78 Speed/rpm regulator 1
79 Bottom support flange 1
80 Safety cube 1
81 Nut 1
82 Sawdust blower switch 1
83 Steel ball 1
84 Spring 1
85 Switch 1
86 Bracket ring 6 1
87 Base flange cover 1
88 Screw M4 × 6 8
89 Assembly desk 1
90 Screw M6 × 16 1
91 Left brush cover 1
92 Screw ST2.9 x 9.5 2
93 Large inner hexagonal wrench 4 1
94 Large inner hexagonal wrench 5 1

12
ASSEMBLY DRAWING
5
•Before connecting the machine to the wall outlet make sure that the main switch is in the "OFF" position.
When you finished your work, disconnect the power plug from the wall outlet and switch off the main switch.
•Never carry electrical tools and appliances by their power cord. When disconnecting the plug from the
wall outlet, never pull the cable by its cord.
•Protect the power cable from high temperatures, oils, paint thinners and make sure that the cable is not
hanging over sharp edges.
•Inspect the power cable regularly. If damaged have it replaced by qualified technician. Inspect extension
cables regularly. If damaged, have it replaced.
•If you need to use an extension cable, use cable with appropriate power rating. Use only completely
unwound. Inspect cables for damages regularly. Damaged cable must be repaired or changed immediately.
•If you are working outside, use an extension cable designed for outside use.
•Before performing any maintenance, repair or adjustment, switch off the main switch and disconnect the
power cable from the wall outlet.
•Make sure no one may incidentally switch your machine on. Do not keep your fingers close to the main
switch, unless absolutely necessary.
•Do not use in environments where explosives are stored or used (paint shops, warehouse with flammables etc.).
•Do not use in humid environments or if wet.
Hand tools
•Do not lay aside your machine unless it is completely stopped.
•When placing you machine aside, make sure that the machine is not pressing on its tool.
•Never use a vise to hold your machine.
•Always have the work piece securely fastened and use extreme caution when releasing it or handling.
Metal turning operations
•Always securely fasten the work piece on the work table using appropriate clamping equipment or vise.
Do not hold the work piece in your hands during work. Use both hands to hold the handles of the
machine/tool.
•Do not overreach. Keep secure posture on both legs. That will help you to keep balance in case of
a reverse impact.
•Keep your tools clean and sharp.
•When changing tools or during maintenance, follow safety instructions.
•To feed or move the work piece use appropriate extension tool.
•Make sure the work piece complies with required technical parameters and that is securely fastened.
•Use extra caution when releasing the work piece from the fastening device.
Cutting with reciprocating saw
•Use only recommended accessories.
•Do not use your machine for metal sheet cutting with thickness, width and strength higher than the
maximum allowed values as described in the technical parameters. Do not use for thermally processed or
hardened materials.
•To prevent injuries do not touch the transmission mechanism during work.
•Do not put your hands in the cutting area.
•Use protective gloves when handling metal sheets to prevent cut injuries to your hands.
•Keep the cutting blade clean and sharp. Using clean and sharp tools minimizes the probability of brea-
kdowns and increases reliability.

•Make sure that there is enough room around the work piece so the saw blade will not cut into floor, work
table etc.
•After switching the machine off, wait until the saw blade comes to a complete stop. Then remove the
blade from the work piece.
•Do not place your hands under the work piece.
•Do not touch the saw blade or the work piece immediately after cutting: both are may be very hot.
•Before switching your machine on, make sure the saw blade is not touching the work piece.
•Before cutting make sure you have set properly the cutting depth.
•If the machine is working, keep you hands in safe distance from the cutting area. Never touch the
oscillating saw blade.
•Do not try to mount the saw upside down to use it as a regular circular saw. Such attempts are prohibited
as they may cause severe injuries.
•Some materials contain toxic materials that are released during cutting. Observe the instructions of the
supplier of the material and protect your skin from direct contact with the sawdust. Also make sure you are
not inhaling the sawdust.
•Do not try to remove the cut-out pieces or do not place the saw anywhere if it is still operating.
•Place the power cable well outside the cut area to prevent accidental cutting or damage to the cable.
•Hold the saw in stable position during cutting.
•Before cutting make sure that there are no nails or metal wires inside the work piece.
•Do not press on the saw too hard to speed up the cut. Excessive pressure on the saw may bring the
speed of the saw blade down. Overloads decreases the lifespan of your machine, saw blade and reduces
the cut quality.
Power equipment
•If your machine is equipped with pressurised springs, use suitable device to release them slowly.
•Before throwing the packaging material out, make sure no part is left inside. If so, take it out and install it.
Use the part listing for check-up and the installation drawing for guidance.
Description
1 - Speed/rpm regulator
2 - Switch
3 - Safety button
4 - Comfortable grip handle
5 - Power cable
6 - Carbon brush cover
7 - Transmission box
8 - Bottom support flange
9 - Cutting mode turn knob
10 - Sawdust blower "ON"/"OFF".
11 - Saw blade
12 - Front cover
OPERATION
ASSEMBLY
6
11
Dear customer. In accordance with the valid regional rules and regulations describing the management of
electrical waste, electrical waste is considered dangerous.
Disposal of electrical waste must be therefore handled as dangerous waste in accordance with waste
management rules valid in the state you are in.
It is prohibited to mix electrical waste with regular household waste.
You may return your used electrical appliance to a recycling facility near you. More information about
electrical and dangerous waste disposal may be obtained from your local authority or from the Internet.
If the machine breaks down, send it back to the vendor for quick repair.
Please, enclose brief description of the defect. That makes repair easier. If the machine is still covered by
warranty, enclose the warranty card and proof of purchase receipt. After the warranty period expires, we
repair your machine for a special price.
To prevent possible damages during shipping, packed the machine carefully or use the original packaging
material. We are not liable for damages occurred during shipping due to improper packaging.
Note: Pictures and contents in this manual may slightly differ from the actual product or accessories.
It is due to continuous improvement of our products. Such small differences have no effect on the product
functionality.
CAUTION

10
•Before performing any maintenance or repair make sure the saw is switched off and the speed regulator is
set to the minimum. The power cable must be disconnected from the wall outlet.
•Keep your tools clean. Dirt from tools may enter the inner machine mechanism and cause damages to the
tools or machine.
•Do not use aggressive cleaning solution or paint thinners to clean the machine.
•Clean plastic parts with soft cloth dipped in soapy water. Make sure no water enters the inside of the machine.
•Clean and lubricate metal surfaces with a cloth dipped in paraffin oil.
•Store the machine well lubricated in a dry place to protect it from corrosion and rust.
•Keep the ventilation screens and openings clean. Inspect them regularly.
•Do not clean the ventilation openings with metal objects since you may damage inner parts behind them.
•Based on the frequency of use, inspect the carbon brushes.
•If you need to change the brushes, change both of them at the same time.
•Repair of electrical equipment may be done by qualified technician only.
In accordance with the applicable law, carbon brushes are considered as expandable
material and are not covered by the warranty policy.
Detailed description of the use of this device is not included in this manual, because the manufacturer /
distributor assumes that the user is experienced in similar type of work. Also according to the applicable
law, this device is considered as a commonly sold and used tool. If the user is unfamiliar with the use of
this device, we recommend finding out more information about using this device at the Department of
work safety.
Lubrication
•Lubricate the stud of the guide wheel. Use few drops of oil regularly. Lubrication significantly increases
the wheel lifespan.
When the operational life of your device is over, dispose off it in accordance with valid rules and regulations.
Your product is made of metal and plastic parts that may be recycled when separated.
1. Disassemble all parts.
2. Separate all parts according to the material they are made of (e.g. metals, rubber, plastics, etc.).
Take the separated parts to the recycling facility near you for further processing.
3. Electrical waste (used electrical power tools, electric motors, recharging equipment, electronics,
accumulators, batteries etc.).
MAINTENANCE
DISPOSAL
7
Always use eye protection goggles with side covers. Dioptre eyeglasses does not protect
your eyes or your ears.
If you are working with materials that produce lot of sawdust, use dust vacuum system.
Switch the sawdust vacuum system on before starting your work. If you cannot use the
vacuuming system use respirator and make sure the room is properly ventilated.
Changing the saw blade
You may use saw blades with grip system bingo systems
Bosch
Important notice: Before assembly or adjustment,
always disconnect the power cable from the wall outlet.
•Use small hexagonal wrench and drive it to the small
opening on the side cover of the handsaw to unscrew
the screw with the inner hexagonal head.
•Place the saw blade in the gripping case, teeth facing
forward.
•When putting the saw blade in make sure that the back
of the blade (edge without teeth) fits well inside the
groove of the guiding wheel and that the end part of
the saw blade is all the way in, touching the stopper.
•Tighten the fastening screw and check that the blade
is securely fastened by switching the slow speed on.
Setting the cutting speed
Before switching your machine on set the speed
(rpm) regulator to the lowest value. To do so, turn
the knob on the handle towards you. The saw now
starts with the lowest speed reducing the risk of
injuries to minimum and ensuring that no impact
will be felt when you start the saw.
•Turn the speed regulator (1) to the right or left to set
the required cutting speed.
•The speed must match the physical properties of the
cutting material.
•Generally, the rule of thumb says; the higher the
cutting speed the faster you finish the cut. But higher
cutting speeds wear out the saw blade faster.
•Number one is the lowest speed and number 6 is the
highest.

8
Switching your machine ON/OFF
•Connect the power cable plug to the wall outlet.
•Before switching your machine on set the speed (rpm)
regulator to the lowest value. To do so, turn the knob
on the handle towards you.
•After you have connected the power cable, press the
safety button 1 and at the same time press the main
switch 2.
•You must keep the switch depressed during cutting.
•Set the required cutting speed by turning the
regulator to the right or to the left.
•When you release the switch 2 the handsaw stops
automatically.
•Place the handsaw on the work table after it has come
to a complete stop.
Setting the cutting angle
You may set the cutting angle gradually in steps
or continuously.
Setting the angle in steps
•Release the screw on the bottom part of the saw. Use
the supplied hexagonal wrench.
•Move the base flange forward and tilt it until you reach the required angle.
•Tighten the screw on the bottom part of the handsaw.
•If you wish to set the angle further, move the base flange back and tilt it in the same direction.
•Then move the base flange forward and secure in place by tightening the screw.
•The angle may be set between 0°- 45° on either side.
•To achieve the perfect precision, set the angle and perform a test cut on a piece of material you don't need.
Measure the angle and reset the angle again until you reach the required precision.
Setting the angle continuously
•Release the screw on the bottom part of the saw. Use the supplied hexagonal wrench.
•Move the base flange to the middle position. Now you may set the angle continuously.
•Tighten the screw.
•Perform test cut again on material you don't need and if needed set the angle again until you achieve
the required precision.
Orbital cutting and straight cutting
•You machine enables you to choose from 4 different cutting modes.
•One mode for straight cutting and 3 modes for orbital cutting.
•Orbital cutting may be used for soft materials such as wood or plastic.
•Orbital cutting widens the cut width and rapidly increases the blade wear and tear. Use for cutting soft
materials only (wood or plastic).
9
NOTE
Orbital cutting cannot be used for metal or hard
wood cutting.
•Orbital cutting offers higher cutting speeds but
decreases the cut area quality when you cut across
the fibre lines direction.
•During orbital cutting the blade moves forward when
the saw blade goes up.
•To select the cutting mode, turn the knob 1 to one of
the four available positions (0,1, 2, 3).
•Position number 0 is for straight cuts
•Positions number 1-3 are for orbital cuts.
•The cutting intensity increases from position 1
to position 3. Position 3 being the most intensive.
Sawdust blower switch
•You machine is equipped with sawdust blower 2.
•Position 0 switches the blower OFF.
•If you choose position number 1, the blower will blow
the sawdust forward.
Using your machine
•The base flange must be always in contact with the cutting material. Otherwise you may damage the saw
blade or injure yourself.
•Move the handsaw forward very slowly when cutting curve.
•Do not press on the saw too hard. Too much pressure decreases the cut quality and may damage the
saw blade.
•Turn the handsaw on and wait few second until the blade reaches its speed. The saw may not be in contact
with the work piece before it reaches its full speed.
•After the saw reaches its speed, place the base flange on the cutting material and slowly slide it forward,
while observing the cut line.
•If you need to start the cut inside the material, drill at the beginning of the cut line a hole with diameter of
12 mm.
•When cutting curves lower the cutting speed.
•The base flange must be in contact with the material from the beginning of the cut till the cut is completed.
It is prohibited to lift the base flange above the material during cutting. Severe injuries or damage to your tool
may occur.
Metal cutting
•Use cutting fluid or oil when cutting metals.
•Spray the oil or the cutting fluid inside the cut, on the saw blade or on the material surface regularly.
Cutting fluids lower the friction between the material and the saw blade.