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Jaw Coupling
SJC Series

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SJC Series

Go to SJC Series(Index)

Jaw Coupling

  • SJC – 2D (.dwg)
  • SJC – 3D (.step)

Side-clamp

Dimensions / Performance
Model CAD Size (±0.3mm) Screw Rated
Torque
(N·m) 		Max.
Torque
(N·m)		 Max.
rpm
(min-1)		 Moment
of
Inertia
(kg·m2) 		Static
Torsional
Stiffness
(N·m/rad) 		Mass
(g)		 Permissible Misalignment Side-
clamp
Hub
Split
(W)
D L L1 L3 F Size Fastening
Torque
(N·m)		 Angular
(˚)		 Parallel
(mm)		 End-
play
(mm)
SJC-14C-BL 14 22 7 - 3.5 M2 0.5 2 4 22,000 1.6×10-7 22 6 1 0.05 -0.2 ~ +0.6 X
SJC-14C-GR 14 22 7 - 3.5 M2 0.5 2 4 22,000 1.6×10-7 25 6 1 0.05 -0.2 ~ +0.6 X
SJC-14C-RD 14 22 7 - 3.5 M2 0.5 2.5 5 22,000 1.6×10-7 34 6 1 0.03 -0.2 ~ +0.6 X
SJC-20C-BL 20 30 10 - 5 M2.6 1 4 8 15,000 1.1×10-6 50 19 1 0.07 -0.3 ~ +0.8 X
SJC-20C-GR 20 30 10 - 5 M2.6 1 4 8 15,000 1.1×10-6 60 19 1 0.07 -0.3 ~ +0.8 X
SJC-20C-RD 20 30 10 - 5 M2.6 1 6 12 15,000 1.1×10-6 74 19 1 0.05 -0.3 ~ +0.8 X
SJC-25C-BL 25 31.3 10 - 5 M3 1.7 9 18 13,000 2.4×10-6 220 25 1 0.07 -0.4 ~ +1.0 X
SJC-25C-GR 25 31.3 10 - 5 M3 1.7 9 18 13,000 2.4×10-6 260 25 1 0.07 -0.4 ~ +1.0 X
SJC-25C-RD 25 31.3 10 - 5 M3 1.7 12 24 13,000 2.4×10-6 300 25 1 0.05 -0.4 ~ +1.0 X
SJCA-30C-BL 30 35.3 11.3 - 5.6 M4 3.5 12 24 10,000 6.2×10-6 170 50 1 0.08 -0.4 ~ +1.0 X
SJCA-30C-GR 30 35.3 11.3 - 5.6 M4 3.5 12 24 10,000 6.2×10-6 200 50 1 0.08 -0.4 ~ +1.0 X
SJCA-30C-RD 30 35.3 11.3 - 5.6 M4 3.5 16 32 10,000 6.2×10-6 220 50 1 0.06 -0.4 ~ +1.0 X
SJCB-30C-BL 30 44.7 16 11.1 5.4 M4 3.5 12 24 10,000 7.5×10-6 170 55 1 0.08 -0.4 ~ +1.0 ○
SJCB-30C-GR 30 44.7 16 11.1 5.4 M4 3.5 12 24 10,000 7.5×10-6 200 55 1 0.08 -0.4 ~ +1.0 ○
SJCB-30C-RD 30 44.7 16 11.1 5.4 M4 3.5 16 32 10,000 7.5×10-6 220 55 1 0.06 -0.4 ~ +1.0 ○
SJCA-40C-BL 40 55 19.5 13.6 6.8 M5 8 17 34 8,500 3.1×10-5 1,500 135 1 0.06 -0.5 ~ +1.2 ○
SJCA-40C-GR 40 55 19.5 13.6 6.8 M5 8 17 34 8,500 3.1×10-5 1,600 135 1 0.06 -0.5 ~ +1.2 ○
SJCA-40C-RD 40 55 19.5 13.6 6.8 M5 8 21 42 8,500 3.1×10-5 1,750 135 1 0.04 -0.5 ~ +1.2 ○
SJCB-40C-BL 40 66 25 16.5 8.4 M5 8 17 34 8,500 3.9×10-5 1,500 160 1 0.06 -0.5 ~ +1.2 ○
SJCB-40C-GR 40 66 25 16.5 8.4 M5 8 17 34 8,500 3.9×10-5 1,600 160 1 0.06 -0.5 ~ +1.2 ○
SJCB-40C-RD 40 66 25 16.5 8.4 M5 8 21 42 8,500 3.9×10-5 1,750 160 1 0.04 -0.5 ~ +1.2 ○
  • The Moment of Inertia and Mass values are based on products with max. Inner diameter.
  • Please modify rated/max. torque value with temperature correction factor when it’s higher than 30ºC.
  • Max. torque/rated torque is the value regarding to a coupling’s self-durability and is not related to slip-torque between the coupling bore and the shaft.
Standard Inner Diameter (ID)
Model Standard Inner Diameter (d1, d2) (mm)
3 4 4.5 5 6 6.35 7 8 9 9.525 10 11 12 14 15 16 18
SJC□-14C ● ● ● ●
SJC□-20C ● ● ● ● ● ● ●
SJC□-25C ● ● ● ● ● ● ● ●
SJC□-30C ● ● ● ● ● ● ● ● ● ●
SJC□-40C ● ● ● ● ● ● ● ● ● ●
  • The recommended shaft tolerance is h7.
  • Custom process (e.g. non-standard Inner diameter, special tolerance etc.) is also available upon a special request in prior to order placement.
  • Keyway is available. (Optional)

Side-clamp

Dimensions / Performance
Model CAD Size (±0.3mm) Screw Rated
Torque
(N·m) 		Max.
Torque
(N·m)		 Max.
rpm
(min-1)		 Moment
of
Inertia
(kg·m2) 		Static
Torsional
Stiffness
(N·m/rad) 		Mass
(g)		 Permissible Misalignment Side-
clamp
Hub
Split
(W)
D L D2 L1 L3 F Size Fastening
Torque
(N·m)		 Angular
(˚)		 Parallel
(mm)		 End-
play
(mm)
SJC-48C-BL 48 66.8 - 25.3 17.4 9 M6 13 35 70 7,000 8.2×10-5 1,800 224 1 0.08 -0.6 ~ +1.3 ○
SJC-48C-GR 48 66.8 - 25.3 17.4 9 M6 13 35 70 7,000 8.2×10-5 2,800 224 1 0.08 -0.6 ~ +1.3 ○
SJC-48C-RD 48 66.8 - 25.3 17.4 9 M6 13 40 80 7,000 8.2×10-5 3,600 224 1 0.05 -0.6 ~ +1.3 ○
SJC-55C-BL 55 78.3 - 30.3 21 10.5 M6 13 60 120 6,500 1.6×10-4 3,000 330 1 0.09 -0.5 ~ +1.4 ○
SJC-55C-GR 55 78.3 - 30.3 21 10.5 M6 13 60 120 6,500 1.6×10-4 4,500 330 1 0.09 -0.5 ~ +1.4 ○
SJC-55C-RD 55 78.3 - 30.3 21 10.5 M6 13 75 150 6,500 1.6×10-4 6,000 330 1 0.06 -0.5 ~ +1.4 ○
SJC-65C-BL 65 90.3 - 35.3 25.6 12.5 M8 30 150 300 5,500 3.8×10-4 6,500 560 1 0.1 -0.6 ~ +1.5 ○
SJC-65C-GR 65 90.3 - 35.3 25.6 12.5 M8 30 150 300 5,500 3.8×10-4 8,500 560 1 0.1 -0.6 ~ +1.5 ○
SJC-65C-RD 65 90.3 - 35.3 25.6 12.5 M8 30 180 360 5,500 3.8×10-4 10,000 560 1 0.08 -0.6 ~ +1.5 ○
SJC-80C-BL 80 114.2 - 45.2 30.2 14.7 M10 50 300 600 4,500 1.0×10-3 8,000 1,050 1 0.1 -0.6 ~ +1.5 ○
SJC-80C-GR 80 114.2 - 45.2 30.2 14.7 M10 50 300 600 4,500 1.0×10-3 12,000 1,050 1 0.1 -0.6 ~ +1.5 ○
SJC-80C-RD 80 114.2 - 45.2 30.2 14.7 M10 50 380 760 4,500 1.0×10-3 14,000 1,050 1 0.08 -0.6 ~ +1.5 ○
SJC-90C-BL 95 126 - 50 35 18 M10 50 450 900 3,500 2.3 x 10-3 12,000 1,640 1 0.15 -0.6 ~ +2.0 ○
SJC-90C-GR 95 126 - 50 35 18 M10 50 450 900 3,500 2.3 x 10-3 14,000 1,640 1 0.15 -0.6 ~ +2.0 ○
SJC-90C-RD 95 126 - 50 35 18 M10 50 500 1,000 3,500 2.3 x 10-3 16,000 1,640 1 0.1 -0.6 ~ +2.0 ○
SJC-100C-BL 104 140.2 - 56.2 39.9 19.9 M12 90 500 1,000 3,500 4.6×10-3 24,000 2,550 1 0.15 -0.6 ~ +2.0 ○
SJC-100C-GR 104 140.2 - 56.2 39.9 19.9 M12 90 500 1,000 3,500 4.6×10-3 30,000 2,550 1 0.15 -0.6 ~ +2.0 ○
SJC-100C-RD 104 140.2 - 56.2 39.9 19.9 M12 90 600 1,200 3,500 4.6×10-3 40,000 2,550 1 0.1 -0.6 ~ +2.0 ○
SJC-120C-GR 120 160 110 65 44.5 22 M12 115 620 1,240 3,150 2.4×10-2 60,000 7,390 0.9 0.16 -1.0 ~ +2.2 ○
SJC-120C-RD 120 160 110 65 44.5 22 M12 115 740 1,480 3,150 2.4×10-2 90,000 7,390 0.8 0.11 -1.0 ~ +2.2 ○
SJC-135C-GR 135 185 115 75 54.5 27 M12 115 850 1,700 2,800 4.0×10-2 90,000 9,900 0.9 0.17 -1.0 ~ +2.6 ○
SJC-135C-RD 135 185 115 75 54.5 27 M12 115 1,050 2,100 2,800 4.0×10-2 150,000 9,900 0.8 0.12 -1.0 ~ +2.6 ○
SJC-160C-GR 160 210 135 85 60.5 26 M16 280 1,700 3,400 2,350 8.6×10-2 90,000 16,300 0.9 0.2 -1.5 ~ +3.0 ○
SJC-160C-RD 160 210 135 85 60.5 26 M16 280 2,100 4,200 2,350 8.6×10-2 150,000 16,300 0.8 0.14 -1.5 ~ +3.0 ○
  • The Moment of Inertia and Mass values are based on products with max. Inner diameter.
  • Please modify rated/max. torque value with temperature correction factor when it’s higher than 30ºC.
  • Max. torque/rated torque is the value regarding to a coupling’s self-durability and is not related to slip-torque between the coupling bore and the shaft.
Standard Inner Diameter (ID)
Model Standard Inner Diameter (d1, d2) (mm)
10 12 14 15 16 18 19 20 22 24 25 26 28 30 32 35 40 45 50 60 65 70 75 80
SJC-48C ● ● ● ● ● ● ● ● ● ●
SJC-55C ● ● ● ● ● ● ● ● ● ● ● ●
SJC-65C ● ● ● ● ● ● ● ● ● ● ● ● ●
SJC-80C ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
SJC-90C ● ● ● ● ● ● ● ● ● ● ● ● ● ●
SJC-100C ● ● ● ● ● ● ● ● ● ● ● ● ●
SJC-120C ● ● ● ● ● ● ●
SJC-135C ● ● ● ● ● ● ●
SJC-160C ● ● ● ● ● ● ● ●
  • The recommended shaft tolerance is h7.
  • Custom process (e.g. non-standard Inner diameter, special tolerance etc.) is also available upon a special request in prior to order placement.
  • Keyway is available. (Optional)
  • Side-clamp Hub Split is available (Optional)
Slip Torque
  • The below table shows the actual permissible torque values when the slip torque value is lower than the coupling’s max. torque value.
  • If the slip torque value is lower than the coupling’s max. torque value, please check and compare between the slip torque in the below table and the operating torque value of the connected motor. It is safer to size up the coupling or use a key/keyway when the slip torque value is lower than the motor’s operating torque.
  • The below slip torque values may be subject to change according to different testing conditions. (e.g. shaft tolerance, surface roughness, surface treatment or acceleration/deceleration of driving shafts). On the other hand, the values could be affected when a different kind of fastening screw is used (body material or surface treatment). Therefore, we recommend you test under the same conditions before mounting.
Model Max. Torque
(N·m)
RD Sleeve		 Slip Torque (N·m) by Inner Diameter (d1, d2)
3 4 4.5 5 6 6.35 7 8 9.525 10 11 12 14 15 16 18
SJC□-14C 4.8 0.6 0.8 0.9 1 1.2
SJC□-20C 12 1 1.5 1.8 1.9 2.1 2.7 2.9
SJC□-25C 24 2 2.6 2.6 3 3.2 3.8 4.8
SJC□-30C 32 4.5 5 8 10.8 10.8 12.4 12.8 13.6 15
SJC□-40C 42 20 23 26 26 27 28 30 31 32
Model Max. Torque
(N·m)
RD Sleeve		 Slip Torque (N·m) by Inner Diameter (d1, d2)
10 12 14 15 16 18 19 20 22 24 25 26 28 30 32 35 40 45 50 60
SJC-48C 80 30 33 37 40 42 45 46 50 55 60
SJC-55C 150 40 42 45 47 50 52 55 60 65 70 73 80
SJC-65C 360 80 82 84 86 90 92 93 95 96 98 100 105 110
SJC-80C 760 90 95 100 110 121 132 141 150 162 175 180 187 193 200 250
SJC-90C 1000 140 176 208 230 240 245 250 250 265 300 320 360 370 460
SJC-100C 1200 300 330 350 390 390 400 410 420 430 450 470 490 550