Dimension Drawing
Specs/CAD
Unit : mm
| Part Number | Max. Bore Diameter (mm) |
Torque（N・m） | Max. Rotational Frequency (min-1) |
Moment of Inertia (kg・m2)＊3 |
Static Torsional Stiffness (N･m/rad) |
Max. Lateral Misalignment (mm) |
Max. Angular Misalignment (°) |
Mass (g) ＊3 |
|
|---|---|---|---|---|---|---|---|---|---|
| Single-Direction Rotation＊1＊2 | Forward/Reverse Rotation＊2 | ||||||||
| MOR-15C | 6 | 1.6 | 0.4 | 42000 | 1.7×10-7 | 80 | 1 | 3 | 5 |
*1: Values based on the results of a durability test under rotation in a single direction, confirming durability of 1 million rotations or more.
*2: If ambient temperature exceeds 30°C, be sure to correct the values using the temperature correction factor in the table.
The allowable operating temperature of MOR-C is -20°C to 80°C.
Depending on the bore diameter, the shaft slip torque may be lower than the coupling torque.⇒Slip torque
*3: These are values with max. bore diameter.Unit : mm
| Part Number | Standard Metric Bore Diameter D1・D2 |
|||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 4 | 5 | 6 | 6.35 | 8 | 9.525 | 10 | 12 | 14 | 15 | 16 | 18 | 19 | 20 | 22 | 25 | 28 | 30 | 35 | |
| MOR-12C | ● | ● | ● | |||||||||||||||||
| MOR-15C | ● | ● | ● | |||||||||||||||||
| MOR-17C | ● | ● | ● | |||||||||||||||||
| MOR-20C | ● | ● | ● | ● | ● | ● | ||||||||||||||
| MOR-26C | ● | ● | ● | ● | ● | ● | ● | |||||||||||||
| MOR-30C | ● | ● | ● | ● | ● | |||||||||||||||
| MOR-34C | ● | ● | ● | ● | ● | |||||||||||||||
| MOR-38C | ● | ● | ● | ● | ● | ● | ● | ● | ||||||||||||
| MOR-45C | ● | ● | ● | ● | ● | ● | ||||||||||||||
| MOR-55C | ● | ● | ● | ● | ● | ● | ● | |||||||||||||
| MOR-68C | ● | ● | ● | ● | ● | ● | ||||||||||||||
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 |
Slip torque
As in the table below, the clamping type MOR-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 | 6.35 | 8 | 9.525 | 10 | 12 | 14 | 15 | 16 | 18 | 20 | 22 | 25 | 28 | 30 | 35 | |
| MOR-12C | 0.8 | 1.9 | 2.4 | ||||||||||||||||
| MOR-15C | 2.3 | 3.5 | 4.8 | ||||||||||||||||
| MOR-17C | 2.7 | 3.6 | 4 | ||||||||||||||||
| MOR-20C | 3.7 | 4.2 | 4.3 | 5.7 | 6.1 | ||||||||||||||
| MOR-26C | 4 | 6.4 | 9.3 | 11 | |||||||||||||||
| MOR-30C | 7.5 | 13 | 13 | 17 | 20 | ||||||||||||||
| MOR-34C | 16 | 18 | 23 | 30 | |||||||||||||||
| MOR-38C | 19 | 20 | 24 | 30 | 34 | 37 | 38 | ||||||||||||
| MOR-45C | 34 | 41 | 42 | 44 | 48 | ||||||||||||||
| MOR-55C | 73 | 75 | 88 | ||||||||||||||||
| MOR-68C | 100 | 100 | 100 | 100 | 110 | 110 | |||||||||||||
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 MOR-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.
Structure
Set Screw Type
MOR MOR
Clamping Type
MOR-C MOR-C
Set Screws + Key Type
MOR-K MOR-K
Clamping + Key Type
MOR-CK MOR-CK
Material/Finish
| MOR-C | |
|---|---|
| Hub | A2017 Anodized＊1 |
| Spacer | Polyacetal |
| Hex Socket Set Screw | SCM435 Ferrosoferric Oxide Film (Black) |
| Hex Socket Head Cap Screw | SCM435 Ferrosoferric Oxide Film (Black) |
＊1： Due to manufacturing process requirements, couplings may have bores with or without surface treatment. This does not affect the performance of the couplings.
Characteristics
- Applicable Motor
| MOR | |
|---|---|
| Servomotor | ● |
| Stepping Motor | ● |
| General-purpose Motor | ◎ |
- Property
| MOR | |
|---|---|
| High Torque | ◎ |
| Allowable Misalignment | ◎ |
| Small Eccentric Reaction Force | ◎ |
| Electrical Insulation | ◎ |
| Allowable Operating Temperature | -20℃ to 80℃ |
- This is an oldham type flexible coupling.
- Slippage of hubs and a spacer allows large eccentricity and angular misalignment 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.
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 MaintenanceThere 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
Chemical resistance of the spacer (Polyacetal)
| Effect | |
|---|---|
| Weather Resistance | Slight Change in Color |
| Weak Acid Resistance | Minor Effect |
| Strong Acid Resistance | Effect |
| Weak Alkali Resistance | Minor Effect |
| Strong Alkali Resistance | Minor Effect |
| Organic Solvent Resistance | Includes Resistance |
Physical property of the spacer (Polyacetal)
| Test Method | unit | Polyacetal | |
|---|---|---|---|
| Density | ISO 1183 | g/cm3 | 1.36 |
| Water Absorption (23°C, Dipped for 24 hr) |
ISO 62 | % | 0.7 |
| Tensile Strength | ISO 527-1, 2 | N/mm2 | 52 |
| Bending Strength | ISO 178 | N/mm2 | 72 |
| Charpy Impact Strength (with Notch) |
ISO 179 / 1eA | kJ/m2 | 5.9 |
| Deflection Temperature Under Load (1.8MPa) |
ISO 75-1, 2 | °C | 85 |
| Insulation Breakdown Strength (3mmt) |
IEC 60243-1 | kV/mm | 20 |
| Volume Resistivity | IEC 60093 | Ω·cm | 1 x 1014 |
| Combustibility | UL94 | - | HB |
Spacer's Projection Structure
Spacer's projection structure allows large angular to be effortlessly accepted. It reduces burden on the shaft.
Eccentric Reaction Force
After running-in operation, the slippage load becomes small, the load on the shaft due to misalignment becomes lowered, and the burden on the shaft bearing is reduced.
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.
Specification Changes
As described below, for the MOR Flexible Couplings, the conventional torque notation has been stated as the value for one-directional rotation without load fluctuations. To clarify the conditions under which the torque values are applicable, we will change the notation to separately indicate the One-Directional Rotation Torque and the Forward/Reverse Rotation Torque.See here for details
https://www.nbk1560.com/news/2026/20260831_MOR/
