Dimension Drawing
Specs/CAD
Unit : mm
| Part Number | A | A1 | L | W | E | F | G | M | Screw Tightening Torque (N・m) |
Standard Bore Diameter D1-D2 |
CAD Download |
Cart |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MOC-12C | 12 | 12 | 6.2 | 19 | 5.2 | 3.1 | 4 | M2 | 0.5 | - | CAD | RFQ |
| MOC-17C | 15 | 16.5 | 7 | 21.2 | 8.2 | 3.5 | 5 | M2.5 | 1 | - | CAD | RFQ |
| MOC-23C | 20 | 22.5 | 8.8 | 27.6 | 12.2 | 4.4 | 7.5 | M3 | 1.5 | - | CAD | RFQ |
| MOC-28C | 26 | 27.5 | 9.7 | 30.4 | 14.2 | 4.9 | 9.5 | M3 | 1.5 | - | CAD | RFQ |
| MOC-33C | 30 | 32.5 | 10 | 32.6 | 15.2 | 5 | 11.1 | M4 | 2.5 | - | CAD | RFQ |
| MOC-41C | 38 | 41 | 12.1 | 40.1 | 18.3 | 6 | 14.2 | M5 | 4 | - | CAD | RFQ |
| Part Number | Max. Bore Diameter (mm) |
Rated Torque (N・m)＊1 |
Max. Torque (N・m)＊1 |
Max. Rotational Frequency (min-1) |
Moment of Inertia (kg・m2)＊2 |
Static Torsional Stiffness (N・m/rad) |
Max. Lateral Misalignment (mm) |
Max. Angular Misalignment (°) |
Mass (g)＊2 |
|---|---|---|---|---|---|---|---|---|---|
| MOC-12C | 5 | 1.2 | 2.1 | 3000 | 9.3×10-8 | 25 | 1 | 3 | 4 |
| MOC-17C | 6 | 1.8 | 3.6 | 3000 | 2.7×10-7 | 50 | 1 | 3 | 8 |
| MOC-23C | 10 | 4 | 8 | 3000 | 1.1×10-6 | 150 | 1.2 | 3 | 16 |
| MOC-28C | 14 | 8 | 14 | 3000 | 3.2×10-6 | 350 | 1.5 | 3 | 27 |
| MOC-33C | 14 | 16 | 25 | 3000 | 6.3×10-6 | 450 | 2 | 3 | 43 |
| MOC-41C | 20 | 30 | 46 | 3000 | 2.0×10-5 | 1100 | 2.5 | 3 | 79 |
＊1： If ambient temperature exceeds 30°C, be sure to correct the rated torque and max. torque with temperature correction factor shown in the following table. The allowable operating temperature of MOC-C is -20°C to 80°C.
The shaft's slip torque may be smaller than the coupling's rated torque depending on the shaft bore. ⇒Slip torque
＊2： These are values with max. bore diameter.| Part Number | Standard Bore Diameter D1-D2 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 15 | 16 | 18 | 20 | |
| MOC-12C | ● | ● | ● | - | - | - | - | - | - | - | - | - |
| MOC-17C | - | ● | ● | ● | - | - | - | - | - | - | - | - |
| MOC-23C | - | - | ● | ● | ● | ● | - | - | - | - | - | - |
| MOC-28C | - | - | - | ● | ● | ● | ● | ● | - | - | - | - |
| MOC-33C | - | - | - | - | ● | ● | ● | ● | - | - | - | - |
| MOC-41C | - | - | - | - | - | ● | ● | ● | ● | ● | ● | ● |
● All products are provided with hex socket head cap screw.
● Recommended tolerance for shaft diameters is h6 and h7.
● A set of hubs with set screw type for one side and clamping type for the other side and others are available upon request.
● Bore and keyway modifications are available on request. Please take advantage of our modification services.
● For the shaft insertion amount to the coupling, see Mounting/maintenance.⇒Mounting and Maintenance
Ambient Temperature / Temperature Correction Factor
| Ambient Temperature | Temperature Correction Factor |
|---|---|
| -20°C to 30°C | 1.00 |
| 30°C to 40°C | 0.80 |
| 40°C to 60°C | 0.70 |
| 60°C to 80°C | 0.55 |
Slip torque
As in the table below, the clamping type MOC-C has different slip torque according to the bore diameter. Take care during selection.Unit : N・m
| Part Number | Bore Diameter | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 15 | 16 | 18 | 20 | |
| MOC-12C | 0.8 | 1.9 | 2.4 | |||||||||
| MOC-17C | 2.3 | 3.5 | 4.8 | |||||||||
| MOC-23C | 3.7 | 4.2 | 5.7 | |||||||||
| MOC-28C | 4 | 9.3 | ||||||||||
| MOC-33C | 7.5 | 13 | 17 | 20 | ||||||||
| MOC-41C | 19 | 20 | 24 | 30 | 34 | 37 | 38 | |||||
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 MOC-C dimension tables. They are not guaranteed values.
Slip torque changes with usage conditions. Carry out tests under conditions similar to actual conditions in advance.
Material/Finish
| MOC-C | |
|---|---|
| Hub | A2017 Anodized＊1 |
| Spacer | Polyacetal with Recycled Carbon Fiber |
| Hex Socket Head Cap Screw | SCM435 Ferrosoferric Oxide Film (Black) |
＊1： With regard to bore 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.
Characteristics
- Applicable motors
| MOC | |
|---|---|
| Servomotor | ● |
| Stepping Motor | ● |
| General-purpose Motor | ◎ |
- Property
| MOC | |
|---|---|
| High Torque | ◎ |
| Allowable Misalignment | ◎ |
| Small Eccentric Reaction Force | ◎ |
| Allowable Operating Temperature | -20°C to 80°C |
- This is an oldham type flexible coupling.
- The spacer uses resin containing eco-friendly recycled carbon fiber. Higher-torque specifications than MOR.
- Slippage of hubs and a spacer allows large eccentricity and angular alignment to be accepted.
- The eccentric reaction generated by misalignment is small and the burden on the shaft is reduced.
- The simple structure allows the unit to be easily assembled.
- Compliant with the Japan Machine Accessory Association organizational standards (TES 1403).
Application
Sputtering device / Parts feeder / Industrial sewing machine / Amusement devicePrecautions 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 cap screw 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 φ 8 and load torque of 0.4N•m, the selection size is MOC-23.Comparison of Rated Torque
Spacer's Projection Structure
Spacer's projection structure allows large angular to be effortlessly accepted. It reduces burden on the shaft.
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%.Changes in the static torsion spring constant within the operating temperature are shown in the graph.
Before using the unit, be aware of the deterioration of responsiveness.
