• Couplings
  • Jaw Type

MJT-K-EWH

Flexible coupling - Jaw-type - Set screw + Key type

  • High Torque
  • Vibration absorption characteristics
  • Press Fitted Sleeve

Dimension Drawing

MJT-K Dimension Figure

MJT-K Dimension Figure

MJT-K Dimension Figure

Specs/CAD

Unit : mm

Part Number A L W B C* E F M Wrench
Torque
(N・m)
Standard bore diameter
D1-D2
CAD
MJT-30K-EWH 30 11 35 10 1.5 11 5.5 M4 1.7 - -
MJT-40K-EWH 40 25 66 12 2 18 12.5 M5 4 - -
MJT-55K-EWH 55 30 78 14 2 27.5 15 M6 7 - -
MJT-65K-EWH 65 35 90 15 2.5 31 17.5 M8 15 - -
MJT-80K-EWH 80 45 114 18 3 37 22.5 M8 15 - -
MJT-95K-EWH 95 50 126 20 3 45.5 25 M8 15 - -

* Use with C Dimension

Part Number Maximum
dimensions
(mm)
Rated
Torque*
(N・m)
Max.
Torque*
(N・m)
Max.
Rotational
(min-1)
Moment
of
Inertia**
(Kg・m2)
Static
Torsional
Stiffness
(N・m/rad)
Max. Lateral
Misalignment
(mm)
Max. Angular
Misalignment
(°)
Max. Axial
Misalignment
(mm)
Sleeve Hardness Mass**
(g)
MJT-30K-EWH 16 7.5 15 21000 6.1×10-6 73 0.15 1 0~+ 1.0 - 43
MJT-40K-EWH 25 10 20 15000 3.6×10-5 570 0.1 1 0~+ 1.2 - 130
MJT-55K-EWH 32 35 70 11000 1.6×10-4 1600 0.15 1 0~+ 1.4 - 310
MJT-65K-EWH 38 95 190 9000 3.6×10-4 3000 0.15 1 0~+ 1.5 - 510
MJT-80K-EWH 45 190 380 7000 1.1×10-3 5300 0.15 1 0~+ 1.8 - 1000
MJT-95K-EWH 55 265 530 6000 2.3×10-3 6200 0.15 1 0~+ 2.0 - 1500

* Correction of rated torque and max. torque due to load fluctuation is not required. However, if ambient temperature exceeds 30℃, be sure to correct the rated torque and max. torque with temperature correction factor shown in the table. MJT-K's allowable operating temperature is -20℃ to 60℃.
** These are values with max. bore diameter.
For transmission of Zero Backlash, please use a tight fit sleeve.

Part Number Stock Bores D1-D2
10 11 12 14 15 16 18 19 20 22 24 25 28 30 32 35 38 40 42 45 48 50 55
MJT-30K-EWH - - - - - - - - - - - - - - - - -
MJT-40K-EWH - - - - - - - - - - -
MJT-55K-EWH - - - - - - - -
MJT-65K-EWH - - - - - - - - -
MJT-80K-EWH - - - - - - - - - - -
MJT-95K-EWH - - - - - - - - - - -

●All products are provided with hex socket set screw.
●In a case where the bore diameter is φ 4 or less, the setscrew is used in only one place.
●Recommended dimensional allowances of applicable shaft diameter are h6 and h7.
●A set of hubs with set screw type for one side and clamping type or other type for the other side is available upon request.


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

Slip torque

Concerning the sizes shown in the table, please note that the shaft's slip torque is smaller than the max. torque of MJT-C.

Unit : N・m

Part Number Bore Diameter (mm)
3 4 4.5 5 6 6.35 7 8 9.525 10 11 12 14 15  16 18 19 20 22 24 25 28 30 32 35 38 40 42 45 48 50 55
MJT-14C 0.8 1.4 1.6 3.4 2.6 2.8 3.4
MJT-20C 3.4 4.5 5.5 7.9 8 8.7 9.4  5  5 10
MJT-30C 9.6 9.7 9.8 15 16.9 19.3 19.9 21.4
MJT-40C 7.1 7.3 7.4 9.8 11.8 16.4 17.9 24.5 27 30.5 34
MJT-55C 20.3 21.8 23.4 26.1 27.9 30.6 36.1 41.6 44.1 52.3 63.7 69.6 79.2 125
MJT-65C 27.5 32.2 48.6 57.7 60.7 63.6 68 74.9 80.5 85 90.6 96 230 230
MJT-80C 88 89 92 93 95 97 100 102 110 320 500 500
MJT-95C 241 243 245 247 249 250 250 250 270 500 500 500

These are test values based on the condition of shaft's dimensional allowance: h7, hardness: from 34-40 HRC, and screw tightening torque of the values described in MJT-C dimensional table.


Details of Shaft Hole

MJT-K

MJT_MJT-K Shaft Hole Details

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~+0.1 4×4
14・15・16 5 ±0.0150 2.3 0~+0.1 5×5
18・19・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
32・35・38 10 ±0.0180 3.3 0~+0.2 10×8
40・42 12 ±0.0215 3.3 0~+0.2 12×8
45・48・50 14 ±0.0215 3.8 0~+0.2 14×9
55 16 ±0.0215 4.3 0~+0.2 16×10

Excerpt from JIS B 1301


Eccentric Reaction Force


Sleeve Details

MJT-K-EWH_Sleeve Details


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 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.


Related Service

Product List

MJT-55K-EWH

MJT-65K-EWH

Customer Service

  • Usage Method
  • Technical Question
  • Customization Products
USA and Canada

NBK America LLC

9:00 to 17:00 on weekdays, Eastern Standard Time

Asia and Europe

Nabeya Bi-tech Kaisha

9:00 to 17:15 on weekdays, Japan Standard Time