Dimension Drawing
| Part Number | Bore Diameter | A | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MJC-65CSK-ERD-11/16-28 | 12.7≦D≦32 32＜D≦38.1 |
65 | 35 | 90 | 15 | 2.5 | 13 | 29.5 | 24 25 |
M8 M6 |
28 13 |
191.27 | CAD | Cart |
＊1： Use with C Dimension
| Part Number | Max. Bore Diameter (mm) |
Rated Torque＊1 (N・m) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| MJC-65CSK-ERD-11/16-28 | 38.1 | 160 | 320 | 9000 | 3.5×10-4 | 4900 | 0.1 | 1 | 0～+ 1.5 | A98 | 490 |
＊1： Correction of rated torque and max. torque due to load fluctuation is not required.However, if ambient temperature exceeds 30°C, be sure to correct the rated torque and max. torque with temperature correction factor shown in the table.MJC-CSK's allowable operating temperature is -20°C to 60°C.
＊2： These are values with max. bore diameter.
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)
Characteristics
- Applicable motors
| Tight Fit | Easy Fit | |
|---|---|---|
| Servomotor | ◎ | ○ |
| Stepping Motor | ◎ | ◎ |
| General-Purpose Motor | ◎ | ◎ |
- Property
| Tight Fit | Easy Fit | |
|---|---|---|
| Zero Backlash | ○ | - |
| High Torque | ◎ | ◎ |
| Allowable Misalignment | ○ | ○ |
| Vibration Absorption | ◎ | ◎ |
| Electrical Insulation | ◎ | ◎ |
| Assembling | ○ | ◎ |
| Allowable Operating Temperature |
-20℃ to 60℃ | -20℃ to 60℃ |
- This is a jaw type flexible coupling.
- Tight Fit enables transmission with zero backlash at low torque.
- Easy fit allows you to assemble and partition the hub and sleeve smoothly.
- Excellent flexibility allows eccentricity, angular misalignment and twisting vibration to be accepted.
- It has electrical insulation. Resistance value: Not less than 2 MΩ
- There are four types of sleeve hardness. Please select desirable units according to usage conditions including torque and misalignment.
- Sleeve Type
Material/Finish
| MJC-CSK-ERD | |
|---|---|
| Hub | A2017 Anodized＊1 |
| Sleeve | Polyurethane |
| Hex Socket Set Screw | SCM435 Ferrosoferric Oxide Film (Black) |
| Hex Socket Head Cap Screw | SCM435 Ferrosoferric Oxide Film (Black) |
＊1： With regard to bore and keyway surface treatment, process needs may result in a mixture of parts with and without surface treatment. This will not lead to any issues in terms of coupling performance.
Structure
Set Screw Type MJC-BLMJC-WHMJC-RDMJC-GRMJC-EBLMJC-EWHMJC-ERDMJC-EGR
MJC-＊＊-＊＊Tight FitMJC-＊＊-E＊＊Easy Fit
Clamping Type MJC-CS-BLMJC-CS-WHMJC-CS-RDMJC-CS-GRMJC-CS-EBLMJC-CS-EWHMJC-CS-ERDMJC-CS-EGR
MJC-＊＊CS-＊＊Tight FitMJC-＊＊CS-E＊＊Easy Fit
Set Screw + Key Type MJC-K-BLMJC-K-WHMJC-K-RDMJC-K-GRMJC-K-EBLMJC-K-EWHMJC-K-ERDMJC-K-EGR
MJC-＊＊K-＊＊Tight FitMJC-＊＊K-E＊＊Easy Fit
Clamping + Key Type MJC-CSK-BLMJC-CSK-WHMJC-CSK-RDMJC-CSK-GRMJC-CSK-EWHMJC-CSK-ERDMJC-CSK-EGR
MJC-＊＊CSK-＊＊Tight FitMJC-＊＊CSK-E＊＊Easy Fit
Sleeve
Selection
Selection based on shaft diameter and rated torque
The area bounded by the shaft diameter and rated torque indicates is the selection size.
Selection Example
In case of selected parameters of shaft diameter of φ15 and load torque of 6 N•m, the selected size for MJC-＊＊-RD, MJC-＊＊-ERD is MJC-30-RD, MJC-30-ERD.Selection based on the rated output of the servomotor
| Rated Output (W) |
Servomotor Specifications | Selection Outside Diameter Size | |||||
|---|---|---|---|---|---|---|---|
| Diameter of Motor Shaft (mm) |
Rated Torque (N・m) |
Instantaneous Max. Torque (N・m) |
MJC-**-BL MJC-**-EBL |
MJC-**-WH MJC-**-EWH |
MJC-**-RD MJC-**-ERD |
MJC-**-GR MJC-**-EGR |
|
| 10 | 5-6 | 0.032 | 0.096 | 14 | 14 | 14 | 14 |
| 20 | 5-6 | 0.064 | 0.19 | 14 | 14 | 14 | 14 |
| 30 | 5-7 | 0.096 | 0.29 | 14 | 14 | 14 | 14 |
| 50 | 6-8 | 0.16 | 0.48 | 20 | 20 | 20 | 20 |
| 100 | 8 | 0.32 | 0.95 | 20 | 20 | 20 | 20 |
| 200 | 9-14 | 0.64 | 1.9 | 30 | 30 | 30 | 30 |
| 400 | 14 | 1.3 | 3.8 | 30 | 30 | 30 | 30 |
| 750 | 16-19 | 2.4 | 7.2 | - | 40 | 40 | 40 |
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.
Selection Example
In case of motor specification of shaft diameter of φ14 and rated torque of 0.64 N•m, the selected size of MJC-＊＊-BL is as follows.Set Screw Type ----MJC-30-BL
Clamping Type ----MJC-30CS-BL
Set Screw + Key Type ----MJC-30K-BL
Clamping + Key Type ----MJC-30CSK-BL
Ambient Temperature / Temperature Correction Factor
| Ambient Temperature | Temperature Correction Factor |
|---|---|
| -20℃ to 30℃ | 1.00 |
| 30℃ to 40℃ | 0.80 |
| 40℃ to 60℃ | 0.70 |
Details of Shaft Hole
| Standard Bore Diameter D |
Keyway | Key | |||
|---|---|---|---|---|---|
| b | t | Nominal Dimension b x h |
|||
| Standard Dimension |
Allowance (JS9) |
Standard Dimension |
Allowance | ||
| 10・11・12 | 4 | ±0.0150 | 1.8 | 0 to +0.1 | 4×4 |
| 14・15・16 | 5 | ±0.0150 | 2.3 | 0 to +0.1 | 5×5 |
| 18・19・20・22 | 6 | ±0.0150 | 2.8 | 0 to +0.1 | 6×6 |
| 24・25・28・30 | 8 | ±0.0180 | 3.3 | 0 to +0.2 | 8×7 |
| 32・35・38 | 10 | ±0.0180 | 3.3 | 0 to +0.2 | 10×8 |
| 40・42 | 12 | ±0.0215 | 3.3 | 0 to +0.2 | 12×8 |
| 45・48・50 | 14 | ±0.0215 | 3.8 | 0 to +0.2 | 14×9 |
| 55 | 16 | ±0.0215 | 4.3 | 0 to +0.2 | 16×10 |
| Standard Bore Diameter D |
Keyway | |||
|---|---|---|---|---|
| Wk | T | |||
| Standard Dimension |
Allowance | Standard Dimension |
Allowance | |
| 1/2 | 1/8 | 0～+0.002 | 0.560 | 0～+0.01 |
| 9/16 | 1/8 | 0～+0.002 | 0.623 | 0～+0.01 |
| 5/8 | 3/16 | 0～+0.002 | 0.709 | 0～+0.01 |
| 11/16 | 3/16 | 0～+0.002 | 0.773 | 0～+0.01 |
| 3/4 | 3/16 | 0～+0.002 | 0.837 | 0～+0.01 |
| 13/16 | 3/16 | 0～+0.002 | 0.900 | 0～+0.01 |
| 7/8 | 3/16 | 0～+0.002 | 0.964 | 0～+0.01 |
| 15/16 | 1/4 | 0～+0.002 | 1.051 | 0～+0.01 |
| 1 | 1/4 | 0～+0.002 | 1.114 | 0～+0.01 |
| 1 1//8 | 1/4 | 0～+0.002 | 1.241 | 0～+0.01 |
| 1 1//4 | 1/4 | 0～+0.002 | 1.367 | 0～+0.01 |
| 1 3//8 | 5/16 | 0～+0.002 | 1.518 | 0～+0.01 |
| 1 1//2 | 3/8 | 0～+0.002 | 1.669 | 0～+0.01 |
| 1 5//8 | 3/8 | 0～+0.002 | 1.796 | 0～+0.01 |
| 1 3//4 | 3/8 | 0～+0.002 | 1.922 | 0～+0.01 |
Sleeve Details
Tight Fit
The hub and sleeve are press-fit and can be used under zero backlash＊1.Since the sleeve's vibration absorption can raise the gain of a servomotor, this unit can achieve high responsive operation exceeding the Disk coupling.＊1： For the torque used under zero backlash, please refer to dimensional table.
Easy Fit
This unit allows you to easily assemble and partition the hub and sleeve. This allows you to reduce the time of assembling the unit and maintenance.It is possible to mount a hub on the shaft in advance and easily assemble the unit even in a location where the coupling is less-visible.Change in static torsional stiffness due to temperature
The change of torsional stiffness within the range of allowable operating temperature is as shown in the graph.
Before using the unit, be aware of the deterioration of responsiveness.
Eccentric Reaction Force
