GJ

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Features

・More allowable misalignment at single use due to longer slits than UJ series.
・Both parallel and angular misalignment are readily absorbed in a single unit.
・Smooth rotary transmission in a compact design.

・Suitable for rotary transmissions requiring electrical insulation.

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Configuration and materials

 

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Cautions when using plastic couplings
･Since they are made of plastic, their strength is inferior to that of metal products. So please take care when handling.
･Take care not to exceed the rated value of the fastening torque (given in the table) for set screws. Otherwise around the screw may be damaged, resulting in axial slip.
･Insert the shaft securely to the B dimension of the external diagram, and do not insert it beyond the slit part.
･Please design so that it does not exceed allowable torque even when excessive torque is applied, such as when starting or stopping the motor.
･When operating continuously at high speed (≧3,000 rpm), secure a safety factor more than twice the allowable value in the table.
･To connect axes that are slightly misaligned, use one of GJ or G2J to connect.

Dimensions

Item
No.		d1 

Standard hole diameters ød1,ød2 H8

(left/right can be freely conbined)

DLFBSet screw
MFastening
torque
(N⋅m)
GJ  

 

  		 1.5   1.5                                                 9 11.4 1.6 3.2 2 0.08
1.5           2.5                                         10 11.8 1.7 3.2 2 0.08
2        2                                              9 13.2 1.6 3.2 2 0.08
3               3                                     12 20 2.6 5.1 3 0.15
4                        4                              13 21 2.7 5.2 3 0.2
5                            5                          14 21 2.7 5.2 3 0.2
6                                6                      15 22 2.8 5.4 3 0.25
8                                    8                  19 24 3.5 7 4 0.4
10                                            10         22 26 3.6 7.1 4 0.5
G2J 4           2.5   3   3.2   4                             13.5 21 2.7 5.3 3 0.25
5                3    3.2   4   5                         15 20.5 2.7 5.3 3 0.25
6                3    3.2   4   5   6                     16 21 2.7 5.5 3 0.3
8                       4   5   6   8                 20 24 4 7.4 4 0.45
GJK
 		 9.53                                       9.53             25 32.2 3.8 7.4 4 0.65
10                                           10         25 32.2 3.8 7.4 4 0.65
12                                  

 

            12     28 34.4 3.9 7.5 4 0.8

Specifications

Item

No.

(d1-d2)

Allowable torque

(N⋅m)

Maximum

Rotating speed

(rpm)

Torsional rigidity
(N⋅m/rad)

Allowable parallel

misalignment

(mm)

Allowable angular

misalignment

(°)

Allowable

end play

(mm)

Moment of inertia
(kg⋅m2)		MassMaterials
(g)
GJ 1.5-1.5 0.16 4,000 4 0.2 3 ±0.3 1.0x10-8 0.9 GFR PBT 
1.5-2.5 0.22 4,000 5 0.2 3 ±0.3 1.4x10-8 1.1
2-2 0.18 4,000 3.5 0.3 4 ±0.3 1.0x10-8 1.0
3-3 0.35 4,000 8 0.4 5 ±0.3 4.5x10-8 2.5
4-4 0.5 4,000 8 0.4 5 ±0.4 7.0x10-8 3.1
5-5 0.55 5,000 10 0.5 5 ±0.4 9.0x10-8 3.3
6-6 0.8 6,000 16 0.5 5 ±0.4  1.2x10-7  3.9
8-8 1.2 8,000 40 0.5 5 ±0.4  3.9x10-7  7.3
10-10 1.7 10,000 60 0.5 5 ±0.4 7.0x10-7 10.0
G2J 4-d 0.5 5,000 6 0.4 5 ±0.4 8.0x10-8 3.4
5-d 0.6 6,000 12 0.4 5 ±0.4 1.0x10-7 4.0
6-d 0.8 6,000 18 0.5 5 ±0.4 1.3x10-7 4.5
8-d 1.4 8,000 50 0.5 5 ±0.4 4.0x10-7 7.5
 GJK  9.53-9.53 2.2 10,000 100 0.4 4 ±0.4 1.3x10-6 15
10-10
12-12 3 12,000 80 0.4 4 ±0.4 2.1x10-6 19

・Heat resistance (ambient temperature):GFR PBT,-30℃ to 85℃

・Note:When the ambient temperature to be used is the maximum, the permissible torque is 1/2 of the value in the table.

 

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