Dimension Drawing
Specs/CAD
| Part Number | A | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| D3 | C | |||||||||||||||||
| XHW-34AC | 34 | 12.5 | 36.8 | 16.5 | 3.75 | 13 | M3 | 16 | 20 | 16 | 4 | 18 | 1.5 | - | 93.46 | CAD | Cart | |
| XHW-39AC | 39 | 15.5 | 46.6 | 20.5 | 4.5 | 14.5 | M4 | 16 | 20 | 16 | 4 | 18 | 3.5 | - | 105.59 | CAD | Cart | |
| XHW-44AC | 44 | 15.5 | 46.6 | 22.5 | 4.5 | 17 | M4 | 16 | 20 | 16 | 4 | 18 | 3.5 | - | 122.47 | CAD | Cart | |
| XHW-56AC | 56 | 20.5 | 61.2 | 28.5 | 6 | 21 | M5 | 24 | 30 | 29 | 6 | 27 | 8 | - | 155.95 | CAD | Cart | |
| XHW-64AC | 64 | 24 | 74.4 | 36 | 7 | 24 | M6 | 24 | 30 | 29 | 6 | 27 | 13 | - | 222.77 | CAD | Cart | |
| XHW-79AC | 79 | 30 | 97.2 | 43 | 8.75 | 29 | M8 | 24 | 30 | 29 | 6 | 27 | 28 | - | 295.39 | CAD | Cart |
| Part Number | Max. Bore Diameter (mm) |
Rated Torque＊1 (N・m) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| XHW-34AC | 16 | 6.3 | 18000 | 1.3×10-5 | 2500 | 0.2 | 2 | ±0.5 | 92 |
| XHW-39AC | 20 | 12 | 16000 | 2.9×10-5 | 4700 | 0.25 | 2 | ±0.5 | 140 |
| XHW-44AC | 22 | 15 | 14000 | 4.7×10-5 | 6400 | 0.25 | 2 | ±0.6 | 173 |
| XHW-56AC | 28 | 37.5 | 11000 | 1.7×10-4 | 12000 | 0.3 | 2 | ±0.7 | 413 |
| XHW-64AC | 35 | 50 | 9800 | 3.3×10-4 | 15000 | 0.35 | 2 | ±0.9 | 563 |
| XHW-79AC | 42 | 100 | 7900 | 1.0×10-3 | 22000 | 0.5 | 2 | ±1.1 | 1173 |
＊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 |
Standard Bore Diameter D2 | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | ||
| XHW-34AC | 11T | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| XHW-39AC | 11T | - | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | - | - | - | - | - | - | - | - | - | - |
| XHW-44AC | 11T | - | - | - | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | - | - | - | - | - | - | - | - | - |
| XHW-56AC | 16T | - | - | - | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | - | - | - | - | - | - |
| XHW-64AC | 16T | - | - | - | - | - | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | - | - | - |
| XHW-79AC | 16T | - | - | - | - | - | - | - | - | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● |
● All products are provided with adapter and hex socket head cap screws.
● Recommended tolerance for shaft diameters is h6 and h7.
● Bore and keyway modifications are available on request for D2 only. Please take advantage of our modification services.
● For the shaft insertion amount to the coupling, see Mounting/maintenance. ⇒Mounting and Maintenance
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 |
|---|---|---|---|---|
|
mm
in.
|
mm
in.
|
Cart |
| 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 | |||||
| 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 |
- Refer to the "Couplicon Bore Diameter Additional Modification Service" for more information.
- BT： Additional modification of bore
- KT： Metric Keyway Modification (JIS Standard)
- KA： Inch Keyway Modification (AGMA Standard)
Adapter Details
| Standard Bore Diameter D1 |
Keyway | |||
|---|---|---|---|---|
| b | k | |||
| Reference Dimensions |
Allowance (JS9) |
Reference Dimensions |
Allowance | |
| 11Ｔ | 4 | ±0.0150 | 12.7 | 0 - +0.1 |
| 16Ｔ | 5 | ±0.0150 | 18.3 | 0 - +0.2 |
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 TypeXHW-C-L Long Type
Adapter + Clamping Type
XHW-AC XHW-AC
Material/Finish
| XHW-AC | |
|---|---|
| Hub | A2017 Anodized |
| Spacer | A2017 Anodized |
| Disk Fixing Bolts | SCM435 Ferrosoferric Oxide Film (Black) |
| Disk | SUS304 |
| Collar | SUS304 |
| Adapter | SUS303 |
| 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 | ● |
- Property
| XHW-C/XHW-C-L/XHW-AC | |
|---|---|
| Zero Backlash | ◎ |
| High-gain Supported | ○ |
| High Torque | ◎ |
| High Torsional Stiffness | ◎ |
| Allowable Misalignment | ○ |
- 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 tablePrecautions 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.
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
Thrust reaction force
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.
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.
