Tsubaki: The choice for chain TM
SERVICE FACTOR
MAXIMUM ALLOWABLE LOAD
Type of Impact
Service Factor
Calculate the chain’s maximum allowable load with this formula:
Smooth transmission
1.0
Max. allowable bearing pressure
Bearing area between pin and bushing
Maximum allowable load
X
X
Transmission with some impact
1.3
Transmission with large impact
1.5
SPEED COEFFICIENT
Chain No.
SS Series
NS Series
AS Series
RS25
26
-
-
Chain Speed
Speed Coefficient
RS35
59
59
91
0 to 50 ft/min
1.0
RS40
99
100
150
50 to 100 ft/min
1.2
RS50 RS60 RS80
154
154
231
100 to 160 ft/min
1.4
231
231
346
160 to 230 ft/min
1.6
397
397
596
RS100
573
573
858
TEMPERATURE FACTOR
Note: All units are in pounds.
Temperature
SS Series
NS Series
AS Series
~-270 º F
X
X
X
-270 º F ~ -40 º F -40 º F ~ -750 º F 750 ºF ~ 930ºF 930 ºF ~ 1,100ºF 1,100 ºF ~ 1,300ºF 1,300 ºF ~ 1,500ºF
1.0
1.0
X
1.0 1.2 1.5
1.0 1.0 1.2
1.0 1.8
X
1.8
1.5
X
X
2.0
X
1,500 ºF ~
X
X
X
X means not suggested. Consult with U.S. Tsubaki. *CS Series temperature range -4 ºF ~ 750ºF
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