Disk Type
SD Series

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SD Series

Go to SD Series(Index)

Double Disk Type Coupling_High Strength Aluminum Alloy Body

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

Side-clamp - Cylinder-shaped

Dimensions / Performance (General Type)
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 D1 L L1 L3 F Size Fastening
Torque
(N·m)
Angular
(˚)
Parallel
(mm)
End-
play
(mm)
SDWA-12C 12 5.5 15.7 5.9 - 1.9 M1.6 0.25 0.2 0.4 14,000 7.5×10-8 85 4 1 0.03 ±0.08 X
SDWA-16C 16 6.3 21.2 7.8 - 2.5 M2 0.5 0.5 1 14,000 3.3×10-7 200 9 1 0.05 ±0.2 X
SDWB-16C 16 6.3 23.2 7.8 - 2.5 M2 0.5 0.5 1 14,000 3.7×10-7 200 10 1 0.05 ±0.2 X
SDWA-19C 19 8.5 23.3 8.7 - 2.9 M2.6 1 0.9 1.8 14,000 7.4×10-7 300 14 1 0.05 ±0.2 X
SDWB-19C 19 8.5 26.3 8.7 - 2.9 M2.6 1 0.9 1.8 14,000 7.9×10-7 300 15 1 0.05 ±0.2 X
SDWA-22C 22.2 9 25 8.7 - 2.8 M2.6 1 1.1 2.2 10,000 1.3×10-6 400 18 1.5 0.12 ±0.2 X
SDWB-22C 22.2 9 27.2 8.7 - 2.8 M2.6 1 1.1 2.2 10,000 1.4×10-6 400 19 1.5 0.12 ±0.2 X
SDWA-26C 26.6 12.2 32.5 10.6 - 3.4 M3 1.7 1.5 3 10,000 3.4×10-6 600 34 1.5 0.15 ±0.3 X
SDWA-31C 31.8 14.4 33.5 11.6 - 3.7 M3 1.7 3 6 9,000 7.5×10-6 1,300 52 1.5 0.15 ±0.4 X
SDWB-31C 31.8 14.4 38.5 11.6 - 3.7 M3 1.7 3 6 9,000 8.8×10-6 1,300 60 1.5 0.15 ±0.4 X
SDWA-35C 35 16.2 34.6 12.7 - 4.4 M4 3.5 4 8 8,500 1.2×10-5 1,500 67 1.5 0.16 ±0.4 X
SDWC-35C 35 16.2 38.1 12.7 - 4.4 M4 3.5 4 8 8,500 1.4×10-5 1,500 75 1.5 0.16 ±0.4 X
SDWA-39C 39 17 39.5 13.7 - 4.3 M4 3.5 5 10 8,000 2.1×10-5 1,800 95 1.5 0.18 ±0.4 X
SDWC-39C 39 17 45 13.7 - 4.3 M4 3.5 5 10 8,000 2.4×10-5 1,800 110 1.5 0.18 ±0.4 X
SDWC-42C 42.5 18 46.2 13.7 - 4.3 M4 3.5 7 14 8,000 3.3×10-5 2,000 120 1.5 0.18 ±0.5 X
SDWC-47C 47 20.4 50 16 - 5.2 M4 3.5 12 24 7,500 5.5×10-5 4,000 160 1.5 0.2 ±0.5 X
SDWB-54C 54 25 52.6 19 13 6.3 M5 8 22 44 7,500 1.1×10-4 7,000 250 1.5 0.2 ±0.5
SDWC-54C 54 25 58.6 19 13 6.3 M5 8 22 44 7,500 1.2×10-4 7,000 280 1.5 0.2 ±0.5
SDWB-64C 64 25.8 74.4 26 15.2 7.5 M6 13 31 62 6,500 3.5×10-4 11,000 455 1.5 0.3 ±0.5
SDWC-64C 64 25.8 84.4 26 15.2 7.5 M6 13 31 62 6,500 4.8×10-4 11,000 530 1.5 0.3 ±0.5
SDW-80C 80 35.8 81.8 29.7 19 9.4 M8 30 75 150 6,000 8.4×10-4 20,000 900 2 0.4 ±0.6
SDWC-80C 80 35.8 98.3 29.7 19 9.4 M8 30 75 150 6,000 9.5×10-4 20,000 1,000 2 0.5 ±0.6
SDW-90C 94.5 41.6 98.9 30.4 19 9.3 M8 30 150 300 6,000 1.8×10-3 35,000 1,350 2 0.4 ±0.8
SDW-100C 104.5 47.7 103.8 30.7 19 9.3 M8 30 220 440 6,000 2.9×10-3 50,000 1,700 2 0.4 ±0.8
  • The Moment of Inertia and Mass values are based on products with max. Inner diameter.
  • 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.
Dimensions / Performance (Lengthy Middle Body Type)
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 D1 L L1 F Size Fastening
Torque
(N·m)
Angular
(˚)
Parallel
(mm)
End-
play
(mm)
SDA-22C 22.2 8.3 33.2 8.7 2.8 M2.6 1 1.1 2.2 10,000 1.5×10-6 400 20 1.5 0.12 ±0.2 X
SDA-26C 26.6 10.5 38.2 10.6 3.4 M3 1.7 1.5 3 10,000 3.9×10-6 600 39 1.5 0.15 ±0.3 X
SDA-31C 31.8 12.7 44.9 11.6 3.7 M3 1.7 3 6 9,000 8.8×10-6 1,300 60 1.5 0.15 ±0.4 X
SDA-39C 39 15.3 56.5 13.7 4.3 M4 3.5 5 10 8,000 3.0×10-5 1,800 120 1.5 0.18 ±0.4 X
  • The Moment of Inertia and Mass values are based on products with max. Inner diameter.
  • Non-standard lengthy middle body type can be customized.
  • 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 (12C ~ 47C)
Model Standard Inner Diameter (d1, d2) (mm)
3 4 4.5 5 6 6.35 7 8 9 9.525 10 11 12 12.7 14 15 15.875 16 17 18 19 20
SD□□-12C
SD□□-16C
SD□□-19C
SD□□-22C ●★ ●★
SD□□-26C
SD□□-31C ●★
SD□□-35C
SD□□-39C
SD□□-42C ●★ ●★
SD□□-47C
Standard Inner Diameter (ID) (54C ~ 100C)
Model Standard Inner Diameter (d1, d2) (mm)
10 11 12 12.7 14 15 15.875 16 17 18 19 20 22 24 25 26 28 30 32 35 40 45 50
SD□□-54C
SD□□-64C ●★ ●★ ●★ ●★
SD□□-80C
SD□□-90C ●★
SD□□-100C ●★
  • 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)
  • Due to interference of the middle parts, make sure the shaft is only inserted into L1 depth for IDs with ★ mark.
  • 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, or acceleration/deceleration of driving shafts). On the other hand, the values could be affected when different kind of fastening screw is used. Therefore, we recommend you test under the same conditions before mounting.
Model Max.
Torque
(N·m)
Slip Torque (N·m) by Inner Diameter (d1, d2)
3 4 4.5 5 6 6.35 7 8 9 9.525 10 11 12 12.7 14 15 15.875 16
SD□□-16C 1 0.6 0.7 0.8 0.9
SD□□-19C 1.8 1 1.3 1.4 1.5 1.7
SD□□-22C 2.2 1.1 1.4 1.5 1.7 2 2.1
SD□□-26C 3 2 2 2.9
SD□□-31C 6 3 3.3 3.9 4.6 5.6
SD□□-35C 8 3.2 3.5 3.8 6 7
SD□□-39C 10 4 4.5 5 6.5 8 9
SD□□-42C 14 4.5 5.5 8 10 11 11 12 12.5
SD□□-47C 24 9 10 11 12 12.5 13.6 14 17.6 22 22 23.6
Model Max.
Torque
(N·m)
Slip Torque (N·m) by Inner Diameter (d1, d2)
10 11 12 12.7 14 15 16 18 19 20 22 24 25 28 30 32 35 40 45 50
SD□□-54C 44 25 27 30 34 42
SD□□-64C 62 36 38 45 50 55 60
SD□□-80C 150 80 85 101 109 128 149
SD□□-90C 300 128 135 150 160 180 200 210 220 230 240
SD□□-100C 440 136 140 144 152 180 185 192 216 230 240 250

Side-clamp - Flange-shaped (Low-inertia)

Dimensions / Performance (General Type)
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 D1 D2 L L1 F Size Fastening
Torque
(N·m)
Angular
(˚)
Parallel
(mm)
End-
play
(mm)
SDWB-35C 35 16.2 21.5 34.6 12.7 4.4 M3 1.7 4 8 8,500 6.1×10-6 1,500 44 1.5 0.16 ±0.4
SDWD-35C 35 16.2 21.5 38.1 12.7 4.4 M3 1.7 4 8 8,500 8.2×10-6 1,500 55 1.5 0.16 ±0.4
SDWA-42C 42.5 18 29.3 39.7 13.4 3.8 M3 1.7 7 14 8,000 2.1×10-5 2,000 84 1.5 0.18 ±0.5
SDWB-42C 42.5 18 29.3 44.2 13.4 3.8 M3 1.7 7 14 8,000 2.4×10-5 2,000 94 1.5 0.18 ±0.5
SDWA-47C 47 20.4 33/*38 45.6 16.7 5 M4 3.5 12 24 7,500 3.6×10-5 4,000 120 1.5 0.2 ±0.5
SDWB-47C 47 20.4 33/*38 51.4 16.7 5 M4 3.5 12 24 7,500 3.9×10-5 4,000 132 1.5 0.2 ±0.5
SDWA-54C 54 25 38.5 60.6 21.4 6.1 M5 8 22 44 7,500 7.2×10-5 7,000 192 1.5 0.2 ±0.5
SDWA-64C 64 25.8 48 74.4 26 7.5 M6 13 31 62 6,500 2.2×10-4 11,000 373 1.5 0.3 ±0.5
  • The Moment of Inertia and Mass values are based on products with max. Inner diameter.
  • 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.
  • Please refer to * marked value for D2 of OD 47 products when ID is over 18mm.
Dimensions / Performance (Lengthy Middle Body Type)
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 D1 D2 L L1 F Size Fastening
Torque
(N·m)
Angular
(˚)
Parallel
(mm)
End-
play
(mm)
SDAA-42C 42.5 18 29.3 50 13.4 3.8 M3 1.7 7 14 8,000 2.7×10-5 2,000 105 1.5 0.18 ±0.5
SDAB-42C 42.5 18 29.3 57.9 13.4 3.8 M3 1.7 7 14 8,000 2.8×10-5 2,000 110 1.5 0.18 ±0.5
SDAC-42C 42.5 18 29.3 67.3 13.4 3.8 M3 1.7 7 14 8,000 2.9×10-5 2,000 115 1.5 0.18 ±0.5
SDAA-47C 47 20 33/*38 63.8 16.7 5 M4 3.5 12 24 7,500 4.5×10-5 4,000 152 1.5 0.2 ±0.5
SDAB-47C 47 20 33/*38 90.7 16.7 5 M4 3.5 12 24 7,500 5.1×10-5 4,000 172 1.5 0.2 ±0.5
SDAA-54C 54 24.3 38.5 76 21.4 6.1 M5 8 22 44 7,500 9.0×10-5 7,000 240 1.5 0.2 ±0.5
SDAB-54C 54 24.3 38.5 89.9 21.4 6.1 M5 8 22 44 7,500 1.1×10-4 7,000 266 1.5 0.2 ±0.5
SDA-64C 64 25.8 48 89.9 26 7.5 M6 13 31 62 6,500 2.7×10-4 11,000 450 1.5 0.3 ±0.5
  • The Moment of Inertia and Mass values are based on products with max. Inner diameter.
  • Non-standard lengthy middle body type can be customized.
  • 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.
  • Please refer to * marked value for D2 of OD 47 products when ID is over 18mm.
Standard Inner Diameter (ID)
Model Standard Inner Diameter (d1, d2) (mm)
5 6 6.35 7 8 9 9.525 10 11 12 12.7 14 15 15.875 16 17 18 19 20 22 24 25
SD□□-35C
SD□□-42C
SD□□-47C
SD□□-54C
SD□□-64C ●★
  • 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)
  • Due to interference of the middle parts, make sure the shaft is only inserted into L1 depth for IDs with ★ mark.
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 operational torque.
  • The below slip torque values may be subject to change according to different testing conditions. (e.g. shaft tolerance, Surface roughness, or acceleration/deceleration of driving shafts). On the other hand, the values could be affected when different kind of fastening screw is used. Therefore, we recommend you test under the same conditions before mounting.
Model Max. Torque
(N·m)
Slip Torque (N·m) by Inner Diameter (d1, d2)
5 6 6.35 7 8 9 9.525 10 11 12 12.7 14 15 15.875 16 17 18 19 20 21
SD□□-35C 8 3.2 3.5 3.8 6 7
SD□□-42C 14 4 4.5 5 6.4 7 7 7.5 8 10.4 11 12
SD□□-47C 24 4.9 6 7 7.8 8.4 11.3 12.2 13.9 17.6 19 22
SD□□-54C 44 20 25 30 32 35 38 40
SD□□-64C 62 36 37 41 42 42 43 44 50 52 58 60