4. How to Select Chains
Data required
Confirmation of the motor characteristics
No
Frequency: 5 times/day, (more than 8 hours)
Yes
Calculate the chain tension from the load
Calculate the chain tension from the motor
Confirm the mass M (Weight W) of the load
From inertia ratio R
From the time for acceleration, deceleration
Shock factor: K
Time for acceleration t s
Time for deceleration t b
Service factor: K s
Calculate the chain tension F s
Calculate the chain tension F b
Starting torque: T s
Stalling torque: T b
Speed factor: K v
Calculate the chain tension F ms
Calculate the chain tension F mb
Choose larger value
Speed factor: K v
Sprocket tooth factor: K c
Choose larger value
Sprocket tooth factor: K c
Calculate the design chain tension F' ms (or F' mb )
Calculate the design chain tension F' s (or F' b )
Calculate the design chain tension F' w
Choose larger value
Unbalance coefficient K u
Determine the chain size where a large tension for F' w , F' ms (or F' mb ), F' s (or F' b ), < Max. allowable. =
Determine the small sprocket N', large sprocket N
Confirm the distance between shafts
Confirm that the sprockets fit the shafts.
Determine the chain and sprocket
Calculate the chain length (number of links)
Determine the lubrication method from the rpm of the small sprocket
End
Figure 4.13 Chain Selection Procedure (Hanging Chain)
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