Kitagawa Y-RE Series User manual

Version 1.12 (2021.07.07)
Original instructions
INSTRUCTION MANUAL
Ytype
ROTARY HYDRAULIC CYLINDER
CLOSED CENTER
Kitagawa Corporation
77-1,Motomachi,Fuchu-shi,Hiroshima,726-8610,Japan
TEL [phone]
FAX [phone]
・This instruction manual is for production engineers and maintenance
personnel in charge of operation of this product. When a beginner
uses this product, receive instructions from experienced personnel,
the distributor or our company.
・Before installing, operating or maintaining this equipment, carefully
read this manual and the safety labels attached to the equipment.
Failure to follow these instructions and safety precautions could result
in serious injury, death, or property damage.
・Store this manual near equipment for future reference.
・If any questions related to safety arise about this manual, please
confirm them with the distributor or our company.
DANGER

MA0886RHG
1
Preface
This manual provides detailed information about how to safely and correctly use the
cylinder (Y type) for a lathe.
Before starting to use this cylinder, read this manual carefully and always follow the
instructions and warnings in "Important Safety Precautions" and "Precautions for Use"
at beginning of the manual. Failure to follow these precautions could result in a serious
accident.
Terms and Symbols Used for Safety Messages
In this manual, precautions for handling that are considered especially important are
classified and displayed as shown below depending on the damage of risk including the
seriousness of the harm that could result. Please sufficiently understand the meanings of
these terms and follow the instructions for safe operation.
Safety Alert Symbol
The triangle is the safety alert symbol used to alert you to potential safety hazards that
could result in injury or death.
Indicates a hazardous situation which, if you not avoided, will
result in death or serious injury.
Indicates a hazardous situation which, if you not avoided,
could result in death or serious injury.
Indicates a hazardous situation which, if you not avoided,
could result in minor or moderate injury.
Indicates instructions which, if not avoided, could result in
damage to the equipment or a shortened work life.

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2
Liability and How to Use this Manual
This product is a hydraulic device to control the operation of power chuck installed on the
lathes or rotary tables. For any other applications, please contact us.
Our company will not assume responsibility for injury, death, damage, or loss resulting from
not following the instructions in this manual.
There are countless things that cannot or should not be done, and it is impossible to cover
all of them in this manual.
Therefore, do not perform any actions unless they are specifically allowed in this manual. If
any questions related to safety arise about operation, control, inspection and maintenance
which are not specified in this manual, please confirm them with our company or distributor
before performing them.
Guarantee and Limitation of Liability
The guarantee period of this product is 1 year after delivery.
Use the parts delivered by Kitagawa Corporation for all the parts including consumable
parts. We will not assume responsibility for injury, death, damage, or loss caused by usage
of parts not manufactured by Kitagawa Corporation. Additionally, if parts other than genuine
parts manufactured by Kitagawa Corporation are used, this guarantee will be completely
invalid.
The chuck and cylinder from Kitagawa Corporation should be used together. If you must
use a part not made by Kitagawa, check with us or our distributor to be sure it is safe to do
so. We will not be responsible for injury, death, damage or loss caused by use of a chuck
or cylinder made by another company unless this use has been approved by Kitagawa or
its distributor.

MA0886RHG
3
Table of Contents
１． Structural Drawing and Parts List ----------------------------------------------------------------------5
1-1. Type display
1-2. Structural drawing
1-3. Scope of product
1-4. Parts list
2. Important Safety Precautions ----------------------------------------------------------10
3. Specifications ----------------------------------------------------------------------------------------------17
3-1. Specification table
4. Hydraulic Oil-------------------------------------------------------------------------------------------------19
5. Trial Operation----------------------------------------------------------------------------------------------21
6. Proximity switch--------------------------------------------------------------------------------------------23
6-1. Specifications
6-2. Adjusting the position of a proximity switch
7. Maintenance and Inspection----------------------------------------------------------------------------25
7-1. Maintenance and inspection of cylinder
7-2. Maintenance and inspection of hydraulic unit
7-3. List of seals to use
8. Malfunction and Countermeasures--------------------------------------------------------------------26
8-1. In the case of malfunction
8-2. Where to contact in the case of malfunction

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4
For Machine Tool Manufacturers (Chapter 9)
9. Attachment---------------------------------------------------------------------------------------------------28
9-1. Outline drawing of attachment
9-2. Production and attachment of cylinder adapter
9-3. Production and attachment of draw bar
9-4. Attachment of cylinder
9-5. Tightening torque of cylinder attaching bolt
10. About Hydraulic Circuit Design------------------------------------------------------------------------38
11. Other Information ----------------------------------------------------------------------------------------41
11-1. About standards and orders
11-2. Information about markings of product
11-3. About disposal

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5
1. Structural Drawing and Parts List
1-1. Type display
Type display as shown below
1
2
3
4
5
6
7
Example
Y
10
20
R
5th digit and after that are not displayed for the standard cylinders.
1.
Y
Abbreviated name of Y cylinders
2.
10
Nominal inside diameter of the cylinder
3.
20
Nominal piston stroke
4.
R
Cylinder with lock valve, relief valve
RE
Cylinder with lock valve, relief valve and proximity switch
5～7
Columns for special specification

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1-2. Structural drawing
Y･R type
Y･RE type
Fig. 1 Note) Proximity switch is not included.
Please prepare by yourself.

MA0886RHG
7
1-3. Scope of product
This instruction manual is for the cylinder part.
Fig. 2
・To prevent the work from flying, safe design, maintenance and erroneous
action prevention of the hydraulic system to maintain the gripping force of the
chuck is extremely important. Thoroughly read the “Important Safety
Precautions” on and after page 10 in this manual.
・As for the chuck, follow the instruction manual for the chuck.

MA0886RHG
8
1-4. Parts list
Y･R type
Fig. 3
Table 1
No.
Part name
Quantity
No.
Part name
Quantity
1
Lock valve
2
19
Socket head cap screw
6,12or16
2
Relief valve
2
20
Socket head cap screw
4
3
Cylinder
1
21
O-ring
1
4
Rotary valve
1
22
5
Sleeve
1
23
O-ring
1
6
Sleeve cover
1
24
O-ring
1
7
Piston
1
25
O-ring
1
8
Guide pin
2
26
O-ring
1
9
27
10
28
Oil seal
1
11
29
Retaining ring
1
12
30
Retaining ring
1
13
31
14
32
15
33
16
34
17
Bearing
1
35
18
Bearing
1

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9
Y･RE type
Fig. 4
Table 2
No.
Part name
Quantity
No.
Part name
Quantity
1
Lock valve
2
19
Socket head cap screw
6,12or16
2
Relief valve
2
20
Socket head cap screw
10
3
Cylinder
1
21
O-ring
1
4
Rotary valve
1
22
O-ring
3
5
Sleeve
1
23
O-ring
1
6
24
O-ring
1
7
Piston
1
25
O-ring
1
8
Guide pin
2
26
O-ring
1
9
Set screw
2
27
Oil seal
1
10
Piston bar
1
28
Oil seal
1
11
Casing
1
29
Retaining ring
1
12
Plate A
2
30
Retaining ring
1
13
Plate B
2
31
Machine screw
3
14
Cover
1
32
Machine screw
4
15
Adjusting plate
2
33
Washer
4
16
Detectable plate
1
34
Set screw
2
17
Bearing
1
35
Set screw
2
18
Bearing
1

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2. Important Safety Precautions
Important safety precautions are summarized below. Please read this section before first
starting to use this product.
DANGER
Failure to follow the safety precautions below will result in
serious injury or death.
Turn off main power supply before attaching, inspecting or replacing
cylinder, and before adding oil.
・The cylinder may start rotation
suddenly, and a part of the body or
clothing may be caught.
Close door before rotating spindle.
・If the door is not closed, you may
touch the rotating chuck or the
work may fly out, which is very
dangerous. (In general, the safety
interlock function which allows
rotation only when the door is the
manual mode or the test mode)
During spindle rotation, do not turn off hydraulic pump power supply and do
not operate switching valve.
・Cutting off hydraulic pressure
causes a drop in the gripping
force which could result in the
work being released and flying
out.
・Operating the manual switching
valve or solenoid valve will lead
to a drop of hydraulic pressure.
For All Users
For All Users
For All Users

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Important Safety Precautions
DANGER
Failure to follow the safety precautions below will result in
serious injury or death.
Do not allow the rotation speed of the chuck to exceed the maximum
allowable speed limit.
・If the rotation speed of the chuck
exceeds the rotation speed limit,
this is very dangerous as the
chuck and work will fly out.
The input force of the chuck (piston thrust, pulling force of the draw bar)
must not exceed the allowable maximum input force.
・Input must match the specification of
the chuck.
・Adjust the hydraulic pressure to the
cylinder so that the input, which
determines the gripping force of the
chuck, does not exceed.
・Excessive input force can lead to
breakage of the chuck, which is very
dangerous, as the chuck can work can
be damaged and fly out.
Be sure cover is attached to periphery of cylinder before operating machine.
(Refer to pages 28-29)
・This will prevent the body or clothing from being
caught in the machine.
Prepare the covers that conform to the following
standards.
・EN953
・EN ISO13857
・EN1088
！
For All Users
For All Users
For All Users

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Important Safety Precautions
DANGER
Failure to follow the safety precautions below will result in
serious injury or death.
Always tighten the bolts at the specified torque. (Refer to pages 37)
・If the torque is insufficient or excessive, the bolt will
break, which is dangerous as the cylinder or work
will fly out.
・Fix the lathe spindle or the cylinder when you
tighten bolts. Your hand could slip and get injury
when you work without fixing the spindle.
・You must use a torque wrench for torque control.
※Since the material of the cylinder is aluminum, it is 80% of the tightening torque to
the bolt size specified for the hydraulic chuck of our company.
Tightening torque is moment of force when you tighten a bolt. Tightening torque= F×L.
Specified torque for socket head cap screw
Bolt size
Tightening torque
M6
10
N・m
M10
58
N・m
M12
85
N・m
M16
200
N・m
For All Users
！

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Important Safety Precautions
DANGER
Failure to follow the safety precautions below will result in
serious injury or death.
Use of a chuck and cylinder that cannot be used together safely may cause
the cylinder to break at high pressure resulting in the chuck and work flying
out.
・Check that the chuck and the cylinder are in the “safe combination” when using at high
pressure with our company or the distributor. Especially when the cylinder of our company
and a high pressure chuck of other company are combined, confirmation is necessary.
・If one of the abnormal events shown below occurs during operation, immediately stop the
machine and consult with our company or the distributor.
・The work slips.
・Loss of accuracy.
・The work begins to chatter.
・The machine's vibration significantly increases.
The gripping force does not rise even if hydraulic pressure is raised.
For All Users

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Important Safety Precautions
DANGER
Failure to follow the safety precautions below will result in
serious injury or death.
Provide sufficient strength for the draw bar (Refer to pages 32-33).
Provide sufficient screw depth for the draw bar.
Firmly tighten the draw bar.
Apply adhesive to the thread part of the draw bar and screw it in at the
specified torque.
・If the draw bar break, the gripping
force is instantly lost and this is
dangerous as work will fly out.
・If the screw depth of the draw bar
is insufficient, the screw will break
and the gripping force will be lost
instantly, and this is dangerous as
work will fly out.
・If the draw bar is unbalanced,
excessive vibration could occur
breaking the screw and resulting in
the gripping force being lost and
the work flying out.
・When screwing the draw bar,
piston to the end of the pull side
stroke.
・If the engagement of the screw of
the draw bar is loose, vibration
may occur resulting in breakage of
the screw. If the screw breaks, the
gripping force will be lost instantly,
which is dangerous as the work
will fly out.
・When the screw is loosened, the
jaw stroke of the chuck becomes
shorter and this is very dangerous
as the work will fly out.
Type
Tightening torque
Y0715R / RE01C
100
N・m
Y1020R / RE47
100
N・m
Y1225R / RE47
180
N・m
Y1530R / RE47
355
N・m
Y2035R / RE47
620
N・m
！
For Machine Tool Manufactures

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Important Safety Precautions
WARNING
Failure to follow the safety precautions below could result in
serious injury or death.
Do not modify the cylinder.
・Doing so may damage the cylinder and cause oil leakage which could result in a fire.
And if the hydraulic oil leaks, the gripping force of the chuck will lower and the work may fly
out, which is dangerous.
・Do not attach additional machining such as screws.
・Do not detach parts of the cylinder from the cylinder.
Do not rotate the cylinder without hydraulic pressure.
・Doing so could cause seizing inside the cylinder, leading to a drop in the gripping force of
the chuck. This is dangerous as work will fly out.
Periodically add hydraulic oil.
Turn off power and use designated hydraulic oil. (Refer to page 19)
・If supplying of the hydraulic oil is insufficient, the operation speed may lower and the thrust
force will become insufficient resulting in a drop in the gripping force of the chuck, which is
dangerous as the work may fly out.
・Use abrasion resistant and deforming hydraulic oil.
For All Users
For All Users
For All Users

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Important Safety Precautions
WARNING
Failure to follow the safety precautions below could result in
serious injury or death.
Assemble piping after completely removing the dust inside the pipe.
Add a filter of 20μm or less into the pressure supplying line(P).
・Failure to do so could cause oil leakage and may result in a fire.
・Maintain the function of the incorporated lock valve and relief valve,
and prevent seizing due to foreign matter.
・If the function of the lock valve lowers, this is dangerous as the
work will fly out when the hydraulic pressure suddenly lowers
due to blackout or malfunction of the hydraulic pump, etc.
・If the function of the relief valve lowers, the volume of the filled
hydraulic oil changes causing an increase in pressure, which is
dangerous resulting in malfunction.
・If seizing is caused by foreign matter, the gripping force of the
chuck will lower, which is dangerous as the work will fly out.
Do not operate the machine
after drinking alcohol or
taking medication.
Do not operate the machine
wearing gloves, a necktie, and
other loose clothing or jewelry.
・Dangerous since these lead to operation
mistakes and misjudgment.
・Dangerous since it will be caught.
Do not attach the other than parts manufactured by Kitagawa Corporation
to the cylinder. (Refer to pages 8-9, Fig.3-4)
・Doing so may damage the cylinder and cause oil leakage which could result in a fire.
And if the hydraulic oil leaks, the gripping force of the chuck will lower and the work may fly
out, which is dangerous.
Filtering
Precision
20μm or
less
For All Users
For All Users
For All Users
For Machine Tool Manufactures
！

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3. Specifications
3-1. Specifications table
Y･R type (Cylinder with lock valve, relief valve)
Table 3
Type
Y0715R
Y1020R
Y1225R
Y1530R
Y2035R
Piston stroke
mm
15
20
25
30
35
Piston surface area
cm2
Push
44
86
122
176
314
Pull
37
79
113
160
290
Piston maximum
thrust force
kN
Push
16.6
32
46
66
117
Pull
13.9
29
42
60
108
Maximum operating hydraulic pressure
MPa
4
4
4
4
4
Maximum rotation speed
min-1
6000
6000
6000
5500
5500
Mass
kg
4.0
7.1
10.0
13.5
22.0
Moment of inertia
kg・m2
0.003
0.013
0.023
0.048
0.098
Drain amount
ℓ／min
0.8
0.8
0.8
0.8
0.8
Balance quality
G6.3
Storing temperature /
Operating temperature
Operating temperature
-20 ~+50 °C / -10 ~+40 °C
Y･RE47 type (Cylinder with lock valve, relief valve, proximity switch)
Table 4
Type
Y0715RE01C
Y1020RE47
Y1225RE47
Y1530RE47
Y2035RE47
Piston stroke
mm
15
20
25
30
35
Piston surface area
cm2
Push
42
84
120
174
312
Pull
37
79
113
160
290
Piston maximum
thrust force
kN
Push
15.9
31
45
65
117
Pull
13.9
29
42
60
108
Maximum operating hydraulic pressure
MPa
4
4
4
4
4
Maximum rotation speed
min-1
6000
6000
6000
5500
5500
Mass
kg
4.5
7.6
10.5
14.0
22.5
Moment of inertia
kg・m2
0.003
0.013
0.023
0.048
0.098
Drain amount
ℓ／min
0.8
0.8
0.8
0.8
0.8
Balance quality
G6.3
Storing temperature /
Operating temperature
-20 ~+50 °C / -10 ~+40 °C
Note 1) The drain amount is a value when the hydraulic pressure is 3.0 MPa, and the oil
temperature is 50℃.

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Note 2) How to obtain the piston thrust force
Note 3) When storing this product, the product should be subjected to the antirust
treatment and stored in a place free from wetting, condensation, or freeze.
Operating
Piston
thrust force
(kN)
=
Piston
Maximum
Thrust force
(kN)
×
Operating
hydraulic pressure(MPa)
－
0.25
Maximum operating
hydraulic pressure(MPa)
－
0.25

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4. Hydraulic Oil
○To keep good operation of the cylinder, it is recommended to use hydraulic oil with a
viscosity of 32cSt at 40℃. (ISO VG32 equivalent product)
○Replace the hydraulic oil about once every six months.
○The characteristics of hydraulic oil influences the heating, drain amount and acting
speed of the cylinder, therefore, control it according to the instruction manual for the
hydraulic unit.
・Turn off the power source and supply designated hydraulic oil. Insufficient oil
supply decreases the acting speed, causes thrust force insufficiency resulting
in a drop in the chuck gripping force, which could allow the work to fly out.
Use abrasion resistant and deforming hydraulic oil. Add a filter of 20μm or
less in the pressure supply line(P) to maintain the function of the cylinder and
to prevent seizing caused by foreign matter.
・If high speed rotation is continued, the oil temperature will rise, which could rapidly a
high temperature, it will rapidly aggravate deterioration of the sealing materials and
deterioration of the hydraulic oil. Use a cooler to keep the oil temperature at 60°C or
lower.
<Example>
Fig. 5
※Keep the back pressure extremely low in this case as well.