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Radial Beam Coupling
SRB Series

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SRB Series

Go to SRB Series(Index)

Radial Beam Coupling _Stainless Steel Body

  • SRB – 2D (.dwg)
  • SRB – 3D (.step)
Dimensions / Performance
Set-screw (SRBS-no mark)
Model CAD Size (±0.3mm, *L: ±1.0mm) 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)
SRBS-12 12.7 18 4.5 2.2 M2.5 0.5 0.2 0.4 34,000 3.0×10-7 65 12.4 2.5 0.1 ±0.3
SRBS-16 16 18.5 4.7 2.3 M3 0.7 0.4 0.8 27,000 7.7×10-7 85 21 2.5 0.15 ±0.3
SRBS-19 19.1 22 5.9 2.9 M3 0.7 0.6 1.2 20,000 1.8×10-6 230 34 2.5 0.15 ±0.3
SRBS-22 22.2 25 6.5 3.2 M4 1.5 1 2 17,000 3.8×10-6 290 49.5 2.5 0.15 ±0.4
SRBS-26 26.2 30 7.7 3.4 M4 1.5 2 4 16,000 8.8×10-6 350 84 2.5 0.2 ±0.4
SRBS-32 31.8 39 9.4 4.7 M5 2 3.8 7.6 14,000 2.7×10-5 840 160 2.5 0.2 ±0.4
SRBS-39 39 56 16 5.9 M5 2 7 14 10,000 8.8×10-5 1,000 388 2.5 0.25 ±0.4
SRBS-49 49 70 19.8 9.4 M6 4 15 30 7,000 2.8×10-4 1,400 775 2.5 0.25 ±0.5
SRBS-60 60 88 19 9 M8 8 30 60 6,000 7.6 x 10-4 1,800 1,416 2.5 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. (Set-screw type is usually less durable than other clamping method, thus please consider it has a complementary option e.g. keyway along with.)
Side-clamp (SRBS-C)
Model CAD Size (±0.3mm, *L: ±1.0mm) 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)
SRBS-12C 12.7 19 5 2.5 M2 0.5 0.2 0.4 32,000 3.0×10-7 65 13 2.5 0.1 ±0.3
SRBS-16C 16 21.5 6.1 3 M2.6 1 0.4 0.8 25,000 9.0×10-7 85 26 2.5 0.15 ±0.3
SRBS-19C 19.1 23 6.2 3.1 M2.6 1 0.6 1.2 18,000 1.7×10-6 230 32 2.5 0.15 ±0.3
SRBS-22C 22.2 26.5 7.2 3.6 M3 1.5 1 2 15,000 3.8×10-6 290 43 2.5 0.15 ±0.4
SRBS-26C 26.2 31.5 7.5 3.7 M3 1.5 2 4 14,000 8.6×10-6 350 84 2.5 0.2 ±0.4
SRBS-32C 31.8 39 9.4 4.7 M4 2.5 3.8 7.6 12,000 2.5×10-5 840 160 2.5 0.2 ±0.4
SRBAS-39C 39 43 10.7 5.3 M5 4 7 14 9,000 6.1×10-5 1,200 280 2.5 0.25 ±0.4
SRBBS-39C 39 56 12 5.5 M5 4 7 14 9,000 8.6×10-5 1,000 360 2.5 0.25 ±0.4
SRBAS-49C 49 63.5 15.1 7.5 M6 8 15 30 7,000 2.7×10-4 1,600 672 2.5 0.25 ±0.5
SRBBS-49C 49 70 14.5 7.2 M6 8 15 30 7,000 2.8×10-4 1,400 740 2.5 0.25 ±0.5
SRBAS-60C 60 76.2 19 9.4 M8 16 30 60 5,000 7.2 x 10-4 2,000 1,150 2.5 0.25 ±0.5
SRBBS-60C 60 88 19 9.4 M8 16 30 60 5,000 8.6 x 10-4 1,800 1,370 2.5 0.25 ±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.
Standard Inner Diameter (ID)
Model Standard Inner Diameter (d1, d2) (mm)
3 4 5 6 6.35 8 9.525 10 11 12 14 15 16 18 19 20 22 24 25
SRBS-12□ ● ● ●
SRBS-16□ ● ● ● ●
SRBS-19□ ● ● ● ● ●
SRBS-22□ ● ● ● ● ● ●
SRBS-26□ ● ● ● ● ● ● ● ●
SRBS-32□ ● ● ● ● ● ● ●
SRB□S-39□ ● ● ● ● ● ● ● ●
SRB□S-49□ ● ● ● ● ● ● ●
SRB□S-60□ ● ● ● ● ● ● ● ●
  • 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)
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)		 Slip Torque (N·m) by Inner Diameter (d1, d2)
3 4 5 6 6.35 8 9.525 10 11 12 14 15 16 18 19 20 22 24 25
SRBS-12C 0.4 0.3 0.5
SRBS-16C 0.8 0.7 0.9
SRBS-19C 1.2 0.9
SRBS-22C 2 1.4 1.8
SRBS-26C 4 0.7 1 1.1 1.2 2 3.2 3.2 3.2
SRBS-32C 7.6 1.4 1.4 1.4 1.7 3 4.1 3
SRB□S-39C 14 2 2.3 2.7 4.4
SRB□S-49C 30 5.1 6 6 7.4 8 9 12
SRB□S-60C 60 7.7 15 17 17 17 19 45 40