MOL
Flexible coupling – Oldham – type – Set screw type/Clamping type
Dimension Drawing
Dimensions/Specifications/CAD
| Part Number | A | L | W | E | F | M | Wrench Torque (N･m) |
|---|---|---|---|---|---|---|---|
| MOL-16 | 16 | 7 | 18 | 7 | 3.5 | M3 | 0.7 |
| MOL-20 | 20 | 9 | 23 | 9 | 4.5 | M4 | 1.7 |
| MOL-25 | 25 | 11 | 28.2 | 11 | 5.5 | M5 | 4 |
| MOL-32 | 32 | 12.7 | 32.7 | 14.5 | 6.5 | M6 | 7 |
| MOL-40 | 40 | 14 | 32 | 17 | 7 | M6 | 7 |
| MOL-50 | 50 | 17 | 38.2 | 23 | 8.5 | M8 | 15 |
| MOL-63 | 63 | 21 | 46.6 | 28 | 10.5 | M10 | 30 |
| Part Number | Max. Bore Diameter (mm) | Rated Torque* (N・m) | Max. Torque* (N・m) | Max. Rotational (min-1) | Static Torsional Stiffness (N・m/rad) | Max. Lateral Misalignment (mm) | Max. Angular Misalignment (°) | Mass** (g) |
|---|---|---|---|---|---|---|---|---|
| MOL-16 | 6.35 | 0.7 | 1.4 | 39000 | 31 | 1 | 3 | 7 |
| MOL-20 | 8 | 1.2 | 2.4 | 31000 | 60 | 1.5 | 3 | 14 |
| MOL-25 | 10 | 2 | 4 | 25000 | 140 | 2 | 3 | 27 |
| MOL-32 | 14 | 4.5 | 9 | 19000 | 280 | 2.5 | 3 | 50 |
| MOL-40 | 16 | 9 | 18 | 15000 | 540 | 3 | 3 | 80 |
| MOL-50 | 20 | 18 | 36 | 12000 | 820 | 3.5 | 3 | 150 |
| MOL-63 | 25 | 36 | 72 | 10000 | 1900 | 4 | 3 | 300 |
*Adjustment of rated and max. torque specifications for load fluctuations is not required.
However, if operating temperature exceeds 30℃, please adjust rated torque and max. torque as detailed in the table below.
The operational temperature range for MOS is -20℃ to 80℃. For more detailed information, please refer to Selection Guidelines [PDF 171KB].
**Based on the max. shaft bores.
| Part Number | Stock Bores D1-D2 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 4 | 5 | 6 | 6.35 | 8 | 9.525 | 10 | 12 | 14 | 15 | 16 | 18 | 20 | 25 | |
| MOL-16 | ● | ● | ● | ● | ● | – | – | – | – | – | – | – | – | – | – |
| MOL-20 | – | ● | ● | ● | ● | ● | – | – | – | – | – | – | – | – | – |
| MOL-25 | – | – | ● | ● | ● | ● | ● | ● | – | – | – | – | – | – | – |
| MOL-32 | – | – | – | – | – | ● | – | ● | ● | ● | – | – | – | – | – |
| MOL-40 | – | – | – | – | – | – | – | ● | ● | ● | ● | ● | – | – | – |
| MOL-50 | – | – | – | – | – | – | – | – | – | ● | ● | ● | ● | ● | – |
| MOL-63 | – | – | – | – | – | – | – | – | – | – | – | ● | ● | ● | ● |
●All products come with set screws (MOS) or cap screws (MOS-C).
●Tolerance of shaft bore on MOS-8 is H8.
●Recommended tolerance for shaft diameters is h6 and h7.
●Bore and keyway modifications are available on request. Please take advantage of our bore modification services.
For more information please refer to Custom Bore Modifications [PDF 495KB].
Material/Finish
| MOL/MOL-C/MOS/MOS-C | |
|---|---|
| Hub | A2017 Alumite Treatment |
| Spacer | Polyacetal |
| Hex Socket Set Screw | SCM435 Ferrosoferric oxide film |
| Hex Socket Head Cap Screw | SCM435 Ferrosoferric oxide film |
Structure
Set Screw type
MOL Outside diameter φ16-φ32 MOL,MOL-C
MOL Outside diameter φ40-φ63
MOS MOS MOS-C
Clamping type
MOL-C Outside diameter φ16-φ32 MOL,MOL-C
MOL-C Outside diameter φ40-φ63
MOS-C MOS MOS-C
Characteristics
- Applicable motors
MOL MOS Servomotor – – Stepping Motor ○ ○ General-purpose motor ◎ ◎ ◎: Excellent ○: Very good
- Property
MOL MOS Allowable Misalignment ◎ ◎ Electrical insulation ◎ ◎ Allowable operating temperature -20℃ to 80℃ -20℃ to 80℃ ◎: Excellent ○: Very good
- This is an oldham-type flexible coupling.
- Slippage of hubs and a spacer allows large eccentricity and angular misalignment to be accepted.
- The load on the shaft generated by misalignment is small and the burden on the shaft is reduced.
- It has electrical insulation.
- Standard type MOL and short type MOS are available.
Application
Parts feeder/Transport device
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 |
| 60℃ to 80℃ | 0.55 |
Comparison of rated torque
