Technical Data  Coupling  Sizing and procedure

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Roller chain coupling 　Stainless steel series 　Selection

1. Operating conditions

  • (1) Daily operating hours
  • (2) Load characteristics and type of motor
  • (3) Transmission power (kW) and rotation speed (r/min) or torque (N·m)
  • (4) Outer diameters of both shafts

2. Selection Method

  • (1) Obtain the service factor from the table of service factors on the right-hand side according to the operating conditions.
  • (2) Multiply the transmission power (or torque) by the service factor and obtain the correction transmission power (or correction transmission torque).
  • (3) Use the transmission capacity table to select a coupling that satisfies the correction transmission power (or correction torque) at the operating rotation speed. (See Table below. )
  • (4) If the required shaft diameter exceeds the maximum shaft diameter of the coupling selected, adopt a coupling a size larger.
  • (5) The contact pressure may become excessive if a standard key is used. Calculate the contact pressure of the key and consider the necessity of using a special key or spline.
Service factor (SF) table
Load characteristics Motor type
Motor
Turbine 		Steam engine
Gasoline engine
(4 cylinders or more )		 Diesel engine
Gas engine
Low fluctuation, low impact, low starting torque, and no reverse rotation 1.0 1.5 2.0
Middle fluctuation, middle impact, and no reverse rotation
(standard load )		 1.5 2.0 2.5
High fluctuation, high impact, reverse rotation, and loaded starting 2.0 2.5 3.0
  • Note) 1. An increase according to the operating hour of the chain coupling (provided that the rotation speed is 50 r/min. or more )

    8 to 16 hours/day ......0.5

    16 hours or more/day ......1.0

  • Note) 2. The above table shows rough service factor standards Decide on the service factor according to the operating conditions.

[Reference ]Relationship between torque, transmission, and rotation speed

T = 9550 × P n   T = 974 × P n

  • T：Torque N・m
  • P：Power transmission kW
  • n：Speed r/min

3. Backlash

Model No. CR4012 CR4014 CR4016 CR5014 CR5016 CR5018 CR6018 CR6022 CR8018 CR8022 CR10020 CR12018 CR12022
Backlash
(deg)		 2.12 1.80 1.58 1.72 1.50 1.32 1.24 1.02 1.16 0.94 1.00 0.84 0.68

Note) The above figures are calculated value and not guaranteed.

4. Operating Temperature Range

Without case With case
Operating temperature (℃) -20～200 -10～80

Note) Contact Tsubaki for information about operation at temperatures above 80°C with the case.