Sprocket and Traction Wheel Rims (B29-15 and B29-12)

Rims which are typically seen operating with American standard bush class chain are available as castings or from fabricated steel. Each wheel is surface flame hardened to the optimum level and case depth around the full circumference. The depth is specified to achieve the maximum wear performance yet leaving the interior tough but ductile to absorb shock loading during elevator operation.

The T form design brings the load centrally over the body flange to reduce the likelihood of hub fatigue. Traction wheel rims are normally split with diagonal cuts. These diagonal cuts reduce the possibility of segment damage at this point as a result of chain barrel impact. Prominent chamfers are employed to allow smooth entry and exit of chain whilst interacting with sprocket or traction wheel rim.



Sprocket and Traction Wheel Rims (B29-15 and B29-12)
fig. 22.3


Fabricated steel rims are readily available for most every chain.
Body NO. Represents bolt circle in inches.

Table 22.7

No of Teeth

Body No

Pitch Diameter

Weight

lbs

kg

SS110

24

16

115

1.75

0.79

C110

SS102B

C102B

SS111

22

16

110

2.25

1.02

24

16

130

C111

26

20

140

30

20

165

JKB856

20

12

90

2.75

1.25

JKB857

22

16

115

JKB956

24

16

145

26

20

155

28

20

170

30

20

185

JKB859

24

16

165

3.50

1.59

26

20

175

30

20

JKB864

36

20

42

35

235

49

35