• Couplings
  • Disk Type

Flexible Couplings - Disk Type - Clamping Type

XHW-C

Safety PrecautionsGlossaryMounting/maintenance

RoHS Compliant

  • Zero Backlash
  • High torsional rigidity
  • High Torque
XHW-C/XHW-C-L/XHW-AC_CFlexible Couplings - Disk Type

Dimension Drawing

XHW-CFlexible Couplings - Disk Type寸法図

XHW-CFlexible Couplings - Disk Type寸法図

Specs/CAD

Part Number ALEWFGM Screw Tightening
Torque (N・m)		Standard Bore Diameter
D1-D2		 Price
(USD)		 CAD
Download		 Add to Cart Additional Modification
XHW-15C 15 7.8 6.3 22.4 2.3 5 M2 0.45 - 67.87 CAD Cart       
XHW-19C 19 9.2 8.5 25.7 2.6 7 M2 0.5 - 55.73 CAD Cart       
XHW-25C 25 11 12.5 32.2 3.3 9.25 M2.5 1 - 58.16 CAD Cart       
XHW-27C 27 11 14.5 32.2 3.3 10.25 M2.5 1 - 58.48 CAD Cart       
XHW-34C 34 12.5 16.5 36.8 3.75 13 M3 1.5 - 68.05 CAD Cart       
XHW-39C 39 15.5 20.5 46.6 4.5 14.5 M4 3.5 - 78.94 CAD Cart       
XHW-44C 44 15.5 22.5 46.6 4.5 17 M4 3.5 - 94.42 CAD Cart       
XHW-56C 56 20.5 28.5 61.2 6 21 M5 8 - 121.30 CAD Cart       
XHW-64C 64 24 36 74.4 7 24 M6 13 - 186.84 CAD Cart       
XHW-79C 79 30 43 97.2 8.75 29 M8 28 - 261.20 CAD Cart       
XHW-98C 98 32 51 104 8.7 38 M8 28 - 439.70 CAD Cart       

Part Number Max. Bore Diameter
(mm)		 Rated
Torque＊1
(N・m)		Max. Rotational Frequency
(min-1)		 Moment of
Inertia
(kg・m2)＊2		Static
Torsional
Stiffness
(N･m/rad)		Max. Lateral Misalignment
(mm)		Max. Angular
Misalignment
(°)		 Max. Axial
Misalignment
(mm)		Mass
(g) ＊2
XHW-15C 6 0.6 42000 3.0×10-7 100 0.1 1.4 ±0.2 9.6
XHW-19C 8 1.5 33000 8.8×10-7 300 0.12 2 ±0.2 17
XHW-25C 12 3 25000 3.4×10-6 1000 0.15 2 ±0.3 35
XHW-27C 14 3.3 23000 4.4×10-6 1400 0.15 2 ±0.4 39
XHW-34C 16 6.3 18000 1.3×10-5 2500 0.2 2 ±0.5 75
XHW-39C 20 12 16000 2.9×10-5 4700 0.25 2 ±0.5 123
XHW-44C 22 15 14000 4.7×10-5 6400 0.25 2 ±0.6 156
XHW-56C 28 37.5 11000 1.7×10-4 12000 0.3 2 ±0.7 340
XHW-64C 35 50 9800 3.3×10-4 15000 0.35 2 ±0.9 490
XHW-79C 42 100 7900 1.0×10-3 22000 0.5 2 ±1.1 1100
XHW-98C 50 280 6400 2.6×10-3 47000 0.5 2 ±1.3 1740

＊1：　Correction of rated torque due to load fluctuation is not required.

※ The shaft's slip torque may be smaller than the coupling's rated torque depending on the shaft bore. XHW-C

＊2：　These are values with max. bore diameter.

Part Number Standard Bore Diameter D1･D2
3 4 5 6 6.35 8 9.525 10 11 12 14 15 16 17 18 19 20 22 24 25 28 30 32 35 38 40 42 45 50
XHW-15C ● ● ● ● - - - - - - - - - - - - - - - - - - - - - - - - -
XHW-19C ● ● ● ● ● ● - - - - - - - - - - - - - - - - - - - - - - -
XHW-25C - ● ● ● ● ● ● ● ● ● - - - - - - - - - - - - - - - - - - -
XHW-27C - ● ● ● ● ● ● ● ● ● ● - - - - - - - - - - - - - - - - - -
XHW-34C - - ● ● ● ● ● ● ● ● ● ● ● - - - - - - - - - - - - - - - -
XHW-39C - - - ● ● ● ● ● ● ● ● ● ● ● ● ● ● - - - - - - - - - - - -
XHW-44C - - - - - ● ● ● ● ● ● ● ● ● ● ● ● ● - - - - - - - - - - -
XHW-56C - - - - - ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● - - - - - - - -
XHW-64C - - - - - - - ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● - - - - -
XHW-79C - - - - - - - - - - ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● - -
XHW-98C - - - - - - - - - - - - - - - - - - - ● ● ● ● ● ● ● ● ● ●

● All products are provided with hex socket head cap screw.
● Recommended tolerance for shaft diameters is h6 and h7. (Recommended tolerance for shaft diameter φ35 only is -0.025 to +0.010.)
● Bore and keyway modifications are available on request. Please take advantage of our modification services.


Part Number
Amount
Price（＄）

Check other products Cart

　　　　　　

Additional Modification Service

Modified Part Number

Enter the desired bore diameter and then click [Check Modified Part Number].

Standard bore diameter(D1) Standard bore diameter(D2) Modified Part Number Price Add to cart

unit:mm
Applicable Bore Diameter
D1D2		 keyway Key
b t Nominal Dimension
b×h
Standard Dimension Allowance
(JS9)		 Standard Dimension Allowance
6 7       2 ±0.0125 1.0 +0.1
0 		2×2
8 9 10     3 ±0.0125 1.4 3×3
11 12       4 ±0.0150 1.8 4×4
13 14 15 16 17 5 ±0.0150 2.3 5×5
18 19 20 22   6 ±0.0150 2.8 6×6
24 25 28 30   8 ±0.0180 3.3 +0.2
0 		8×7
32 35 36 38   10 ±0.0180 3.3 10×8
40 42 44     12 ±0.0215 3.3 12×8
45 48 50     14 ±0.0215 3.8 14×9
55 16 ±0.0215 4.3 16×10

unit:inch
Standard Inch Bore Diameter
D1D2		 Keyway
Wk T
Standard Dimension Allowance Standard Dimension Allowance
1/2 1/8 +0.002
  0		 0.560 +0.01
  0
9/16 1/8 +0.002
  0		 0.623 +0.01
  0
5/8 3/16 +0.002
  0		 0.709 +0.01
  0
11/16 3/16 +0.002
  0		 0.773 +0.01
  0
3/4 3/16 +0.002
  0		 0.837 +0.01
  0
13/16 3/16 +0.002
  0		 0.900 +0.01
  0
7/8 3/16 +0.002
  0		 0.964 +0.01
  0
15/16 1/4 +0.002
  0		 1.051 +0.01
  0
1 1/4 +0.002
  0		 1.114 +0.01
  0
1-1/8 1/4 +0.002
  0		 1.241 +0.01
  0
1-1/4 1/4 +0.002
  0		 1.367 +0.01
  0
1-3/8 5/16 +0.002
  0		 1.518 +0.01
  0
1-1/2 3/8 +0.002
  0		 1.669 +0.01
  0
1-5/8 3/8 +0.002
  0		 1.796 +0.01
  0
1-3/4 3/8 +0.002
  0		 1.922 +0.01
  0

Slip torque

As in the table below, the clamping types XHW-C and XHW-C-L have different slip torque according to the bore diameter. Take care during selection.

Unit : N・m

Outside Diameter Bore Diameter (mm)
3 4 5 6 6.35 8 9.525 10 11 12 14 15 16 25 28 30 32 35 38 40 42 45
15 0.7
19 0.7 1.7 3
25 2.5 3.6 4.7 5
27 2 2.9 4 4.2 5.8
34 3.5 4.9 5.5 7.9 10 11 12
39 6 8 13 18 19 23
44 8 13 15 20 26
56 22 34 37 45 55 66
64 23 42 60 88
79 140 150 180
98 120 140 150 170 190 210 220 240 260

These are test values based on the conditions of shaft dimensional allowance: h7, hardness: 34-40 HRC, and screw tightening torque of the values described in XHW-CXHW-C-L dimension tables. They are not guaranteed values.
Slip torque changes with usage conditions. Carry out tests under conditions similar to actual conditions in advance.


Structure

Clamping TypeXHW-CXHW-C-L

XHW-C Standard Type
XHW-C-L Long Type

XHW-C/XHW-C-L/XHW-AC_CFlexible Couplings - Disk Type

Adapter + Clamping Type

XHW-AC XHW-AC

XHW-C/XHW-C-L/XHW-AC_CFlexible Couplings - Disk Type


Material/Finish

XHW-C
Hub A2017
Anodized
Spacer A2017
Anodized
Disk Fixing Bolts SCM435
Ferrosoferric Oxide Film (Black)
Disk SUS304
Collar SUS304
Hex Socket Head Cap Screw SCM435
Ferrosoferric Oxide Film (Black)

Characteristics

  • Recommended applicable motor
XHW-C/XHW-C-L/XHW-AC
Servomotor ◎
Stepping Motor ◎
General-purpose Motor ●

◎: Excellent ○: Very good ●: Available

  • Property
XHW-C/XHW-C-L/XHW-AC
Zero Backlash ◎
High-gain Supported ○
High Torque ◎
High Torsional Stiffness ◎
Allowable Misalignment ○

◎: Excellent ○: Very good

  • This is a disk type flexible coupling.
  • High-torque specification with rated torque 1.5 times higher than conventional products.
  • This is the most appropriate for a servomotor with instantaneous max. torque of 350%.
  • The stainless steel disk allows eccentricity, angular alignment, and end-play.
  • Standardized XHW-AC adapter type that also supports 1/10 taper shafts of servomotors.

Application

Actuator / Surface-mount machine / High precision XY stage / Index table

Precautions for Use

In case of mounting on D-cut shaft, be careful about the position of the D-cut surface of the shaft. ⇒Mounting and Maintenance
There are sizes where the hex socket head bolt exceeds the outer diameter of the coupling and the rotating diameter is larger than the outer diameter. Please be careful of the interference of coupling. Rotation Diameter

Selection

Selection Based on Shaft Diameter and Rated Torque

The area bounded by the shaft diameter and rated torque indicates the selection size.

XHW-C/XHW-C-L/XHW-AC_CFlexible Couplings - Disk Type

XHW-C/XHW-C-L/XHW-AC_CFlexible Couplings - Disk Type

XHW-C/XHW-C-L/XHW-AC_CFlexible Couplings - Disk Type

Selection Example

In case of selected parameters of shaft diameter of φ14 and load torque of 3 N•m, the selected size is XHW-27C.

Selection Based on the Rated Output of the Servomotor

XHW-C supports the servomotor with instantaneous max. torque increased to 350% of the rated torque and the size can be more reduced than the size of conventional product XBW-C.
Rated Output
(W)		 Servomotor Type Servomotor Specifications＊1 Selection Size
Mitsubishi Electric Corporation YASKAWA Electric Corporation SANYO DENKI Co., Ltd. KEYENCE CORPORATION Diameter of Motor Shaft
(mm)		 Rated Torque
(N・m)		 Instantaneous Max. Torque
(N・m)		 XHW-C XBW-C
100 HG-KR SGMJV R2 SV 8 0.32 1.1 XHW-19C XBW-25C
200 14 0.64 2.2 XHW-27C XBW-34C
400 14 1.3 4.5 XHW-34C XBW-39C
750 16 - 19 2.4 8.4 XHW-39C XBW-44C

＊1：　Motor specifications are based on general values. For details, see the motor manufacturer's catalogs. This is the size for cases where devices such as reduction gears are not used.


Eccentric Reaction Force

XHW-C/XHW-C-L/XHW-AC_TTechnical Information

XHW-C/XHW-C-L/XHW-AC_TTechnical Information


Thrust reaction force

XHW-C/XHW-C-L/XHW-AC_TTechnical Information

XHW-C/XHW-C-L/XHW-AC_TTechnical Information


Change in static torsional stiffness due to temperature

This is a value under the condition where the static torsional stiffness at 20°C is 100%.
The change of XHW-CXHW-AC in torsional stiffness due to temperature is small and the change in responsiveness is extremely small. If the unit is used under higher temperature, be careful about misalignment due to elongation or deflection of the shaft associated with thermal expansion.

XHW-C/XHW-C-L/XHW-AC_TTechnical Information


Static torsional stiffness comparison (double disc-type)

XHW-C XHW-AC has high static torsional stiffness and responsiveness.
Optimal for high-speed and precision positioning for servomotors, etc.

XHW-C/XHW-C-L/XHW-AC_TTechnical Information


Related Services

Product List

XHW-15C

XHW-19C

XHW-25C

XHW-27C

XHW-34C

XHW-39C

XHW-44C

XHW-56C

XHW-64C

XHW-79C

XHW-98C

Click here to see Disk Type

XGHW-C

Part Name

Flexible Couplings - The Vibration-Absorption Capable Disk Type

Part Number

XGHW-C

Feature

Vibration Absorption
High-Gain Support
High Torsional Rigidity

XHW-AC

Part Name

Flexible Couplings - Disk Type - Adapter + Clamping Type

Part Number

XHW-AC

Feature

Zero Backlash
High Torque
High Torsional Stiffness

XHW-C-L

Part Name

Flexible Couplings - Disk Type - Clamping Type

Part Number

XHW-C-L

Feature

Zero Backlash
High Torque
High Torsional Stiffness

XHS-C

Part Name

Flexible Couplings - Single-Disk Type

Part Number

XHS-C

Feature

Zero Backlash
High Torque
High Torsional Stiffness

Click here to see Couplings

Rigid Type

Rigid Type

Bellows Type

Bellows Type

High Gain Rubber Type

High Gain Rubber Type

Serration Type

Serration Type