Shaft Coupling

Coupling is a core component that transmits power and motion
from the driving shaft to the driven part while absorbing misalignment
and any possible factors that could reduce efficiency of machines
(e.g. vibration, noise, electric current, etc.)

SJC Series Go to SJC Series(Index)

Jaw Coupling

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

Set-Screw

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
D L L1 F Size Fastening
Torque
(N·m)		 Angular
(˚)		 Parallel
(mm)		 End-play
(mm)
SJC-14-BL 14 22 7 3.5 M3 0.7 2 4 27,000 2.1×10-7 22 6.7 1 0.05 -0.2 ~ +0.6
SJC-14-GR 14 22 7 3.5 M3 0.7 2 4 27,000 2.1×10-7 25 6.7 1 0.05 -0.2 ~ +0.6
SJC-14-RD 14 22 7 3.5 M3 0.7 2.5 5 27,000 2.1×10-7 34 6.7 1 0.03 -0.2 ~ +0.6
SJC-20-BL 20 30 10 4.7 M3 0.7 4 8 19,000 1.0×10-6 50 18.3 1 0.07 -0.3 ~ +0.8
SJC-20-GR 20 30 10 4.7 M3 0.7 4 8 19,000 1.0×10-6 60 18.3 1 0.07 -0.3 ~ +0.8
SJC-20-RD 20 30 10 4.7 M3 0.7 6 12 19,000 1.0×10-6 74 18.3 1 0.05 -0.3 ~ +0.8
SJC-25-BL 25 31.3 10 5 M4 1.7 9 18 15,000 2.7×10-6 220 30 1 0.07 -0.4 ~ +1.0
SJC-25-GR 25 31.3 10 5 M4 1.7 9 18 15,000 2.7×10-6 260 30 1 0.07 -0.4 ~ +1.0
SJC-25-RD 25 31.3 10 5 M4 1.7 12 24 15,000 2.7×10-6 300 30 1 0.05 -0.4 ~ +1.0
SJCA-30-BL 30 35.3 11.3 5.6 M4 1.7 12 24 13,000 6.2×10-6 170 46 1 0.08 -0.4 ~ +1.0
SJCA-30-GR 30 35.3 11.3 5.6 M4 1.7 12 24 13,000 6.2×10-6 200 46 1 0.08 -0.4 ~ +1.0
SJCA-30-RD 30 35.3 11.3 5.6 M4 1.7 16 32 13,000 6.2×10-6 220 46 1 0.06 -0.4 ~ +1.0
SJCB-30-BL 30 44.7 16 7.3 M4 1.7 12 24 13,000 8.2×10-6 170 60 1 0.08 -0.4 ~ +1.0
SJCB-30-GR 30 44.7 16 7.3 M4 1.7 12 24 13,000 8.2×10-6 200 60 1 0.08 -0.4 ~ +1.0
SJCB-30-RD 30 44.7 16 7.3 M4 1.7 16 32 13,000 8.2×10-6 220 60 1 0.06 -0.4 ~ +1.0
SJCA-40-BL 40 55 19.5 9.3 M5 4 17 34 9,600 3.3×10-5 1,500 132 1 0.06 -0.5 ~ +1.2
SJCA-40-GR 40 55 19.5 9.3 M5 4 17 34 9,600 3.3×10-5 1,600 132 1 0.06 -0.5 ~ +1.2
SJCA-40-RD 40 55 19.5 9.3 M5 4 21 42 9,600 3.3×10-5 1,750 132 1 0.04 -0.5 ~ +1.2
SJCB-40-BL 40 66 25 11.6 M5 4 17 34 9,600 4.0×10-5 1,500 163 1 0.06 -0.5 ~ +1.2
SJCB-40-GR 40 66 25 11.6 M5 4 17 34 9,600 4.0×10-5 1,600 163 1 0.06 -0.5 ~ +1.2
SJCB-40-RD 40 66 25 11.6 M5 4 21 42 9,600 4.0×10-5 1,750 163 1 0.07 -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. (Set-screw type is usually less durable than other clamping method, thus please consider it has a complementary option e.g. keyway along with.)
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□-14 ● ● ● ●
SJC□-20 ● ● ● ● ● ● ●
SJC□-25 ● ● ● ● ● ● ● ●
SJC□-30 ● ● ● ● ● ● ● ● ● ●
SJC□-40 ● ● ● ● ● ● ● ● ● ●
  • 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)

Set-Screw

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
D L L1 F Size Fastening
Torque
(N·m)		 Angular
(˚)		 Parallel
(mm)		 End-play
(mm)
SJC-55-BL 55 78.3 30.3 14 M6 7 60 120 7,500 1.7×10-4 3,000 344 1 0.09 -0.5 ~ +1.4
SJC-55-DG 55 78.3 30.3 14 M6 7 60 120 7,500 1.7×10-4 4,500 344 1 0.08 -0.5 ~ +1.4
SJC-55-GR 55 78.3 30.3 14 M6 7 60 120 7,500 1.7×10-4 4,500 344 1 0.09 -0.5 ~ +1.4
SJC-55-RD 55 78.3 30.3 14 M6 7 75 150 7,500 1.7×10-4 6,000 344 1 0.06 -0.5 ~ +1.4
SJC-65-BL 65 90.3 35.3 17.2 M8 15 150 300 6,000 3.9×10-4 6,500 535 1 0.1 -0.6 ~ +1.5
SJC-65-DG 65 90.3 35.3 17.2 M8 15 150 300 6,000 3.9×10-4 8,500 535 1 0.09 -0.6 ~ +1.5
SJC-65-GR 65 90.3 35.3 17.2 M8 15 150 300 6,000 3.9×10-4 8,500 535 1 0.1 -0.6 ~ +1.5
SJC-65-RD 65 90.3 35.3 17.2 M8 15 180 360 6,000 3.9×10-4 10,000 535 1 0.08 -0.6 ~ +1.5
SJC-80-BL 80 114.2 45.2 21.7 M8 15 300 600 5,000 1.1×10-3 8,000 1,150 1 0.1 -0.6 ~ +1.5
SJC-80-DG 80 114.2 45.2 21.7 M8 15 300 600 5,000 1.1×10-3 12,000 1,150 1 0.09 -0.6 ~ +1.5
SJC-80-GR 80 114.2 45.2 21.7 M8 15 300 600 5,000 1.1×10-3 12,000 1,150 1 0.1 -0.6 ~ +1.5
SJC-80-RD 80 114.2 45.2 21.7 M8 15 380 760 5,000 1.1×10-3 14,000 1,150 1 0.08 -0.6 ~ +1.5
SJC-100-BL 104 140.2 56.2 27.3 M10 25 500 1,000 4,000 4.8×10-3 24,000 2,650 1 0.15 -0.6 ~ +2.0
SJC-100-DG 104 140.2 56.2 27.3 M10 25 500 1,000 4,000 4.8×10-3 24,000 2,650 1 0.12 -0.6 ~ +2.0
SJC-100-GR 104 140.2 56.2 27.3 M10 25 500 1,000 4,000 4.8×10-3 30,000 2,650 1 0.15 -0.6 ~ +2.0
SJC-100-RD 104 140.2 56.2 27.3 M10 25 600 1,200 4,000 4.8×10-3 40,000 2,650 1 0.1 -0.6 ~ +2.0
  • 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. (Set-screw type is usually less durable than other clamping method, thus please consider it has a complementary option e.g. keyway along with.)
Standard Inner Diameter (ID)
Model Standard Inner Diameter (d1, d2) (mm)
12 14 15 16 18 19 20 22 24 25 26 28 30 32 35 40 45 50 60
SJC-55 ● ● ● ● ● ● ● ● ● ● ● ●
SJC-65 ● ● ● ● ● ● ● ● ● ● ● ● ●
SJC-80 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
SJC-100 ● ● ● ● ● ● ● ● ● ● ● ● ●
  • 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)