*1: Correction of rated torque and max. torque due to load fluctuation is not required.
*2: These are values with max. bore diameter.
*3: The max. lateral misalignment varies depending on the load torque and revolution.
As in the table below, the clamping type MOM-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
10
12
14
15
16
18
20
22
24
25
28
30
35
MOM-15C
0.3
0.5
0.8
1
MOM-17C
2.1
3.5
3.7
MOM-20C
3.8
6
6
6.8
7.5
MOM-26C
5.4
5.4
5.8
6.6
8.7
MOM-30C
7.4
12
14
15
MOM-34C
13
13
15
16
16
MOM-38C
16
18
20
23
25
28
31
MOM-45C
47
48
56
56
57
62
MOM-55C
42
54
55
56
89
93
97
MOM-70C
62
92
95
97
100
110
120
130
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 MOM-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.
Lithium Soap Grease
Nippeco DXL-No.1 Made by Nippeco
Characteristics
Recommended Applicable Motor
MOM
Servomotor
●
Stepping Motor
●
General-purpose Motor
◎
◎: Excellent ○: Very good ●: Available
Property
MOM
High Torque
◎
High Torsional Stiffness
◎
Allowable Misalignment
○
◎: Excellent ○: Very good
This is an oldham type flexible coupling.
FCD400 is adopted in the spacer. Suitable for low-speed and high-torque specification.
High performance grease is applied in the gap between hubs and the spacer in order to prevent sticking.
Slippage of hubs and a spacer allows large eccentricity and angular misalignment to be accepted.
A projection placed in the spacer (resin pin) allows angular misalignment to be effortlessly accepted.
The grease accumulated in a grease hole will gradually seep out during operation, thereby maintaining the lubrication property over a long period.
Application
Mixer / Pump / Small power press / Grinder
Precautions for Use
Please apply grease periodically in order to prevent sticking of hubs and a spacer.
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 φ6 and load torque of 4N•m, the selected size is MOM-17.
Details of Shaft Hole
Unit : mm
Standard Bore Diameter
D
Keyway
Key
b
t
Nominal Dimension
b x h
Standard Dimension
Allowance
(JS9)
Standard Dimension
Allowance
6・6.35
2
±0.0125
1.0
0 - +0.1
2 × 2
8
3
±0.0125
1.4
0 - +0.1
3 × 3
10・12
4
±0.0150
1.8
0 - +0.1
4 × 4
14・15・16
5
±0.0150
2.3
0 - +0.1
5 × 5
18・20・22
6
±0.0150
2.8
0 - +0.1
6 × 6
24・25・28・30
8
±0.0180
3.3
0 - +0.2
8 × 7
35
10
±0.0180
3.3
0 - +0.2
10 × 8
Excerpt from JIS B 1301
Comparison of Rated Torque
Comparison of Static Torsional Stiffness
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 MOM 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.
Max. Lateral Misalignment
MOM's max. lateral misalignment varies depending on the load torque and revolution.
Example
When load torque is 25 N•m and revolution is 1000 min-1, the max. lateral misalignment of MOM-55 is 0.5 mm.
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