Sprocket and Traction Wheel Rims (B29-15 and B29-12)
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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.
Fabricated steel rims are readily available for most every chain.
Body NO. Represents bolt circle in inches.
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Table 22.7 |
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No of Teeth |
Body No |
Pitch Diameter |
Weight |
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lbs |
kg |
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SS110 |
24 |
16 |
115 |
1.75 |
0.79 |
|
C110 |
|||||
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SS102B |
|||||
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C102B |
|||||
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SS111 |
22 |
16 |
110 |
2.25 |
1.02 |
|
24 |
16 |
130 |
|||
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C111 |
26 |
20 |
140 |
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|
30 |
20 |
165 |
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JKB856 |
20 |
12 |
90 |
2.75 |
1.25 |
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JKB857 |
22 |
16 |
115 |
||
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JKB956 |
24 |
16 |
145 |
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26 |
20 |
155 |
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28 |
20 |
170 |
|||
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30 |
20 |
185 |
|||
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JKB859 |
24 |
16 |
165 |
3.50 |
1.59 |
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26 |
20 |
175 |
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30 |
20 |
|
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JKB864 |
36 |
20 |
|
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|
42 |
35 |
235 |
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|
49 |
35 |
|
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