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Selection Chart for Roller Chain ANSI No.
| |
Nominal Driver Speed (rpm) |
| HP per chain |
25 |
75 |
150 |
300 |
600 |
900 |
1200 |
1800 |
2400 |
| 1/2 |
60 |
40 |
35 |
35 |
- |
- |
- |
- |
- |
| 3/4 |
80 |
40 |
35 |
35 |
- |
- |
- |
- |
- |
| 1 |
80 |
40 |
40 |
35 |
35 |
- |
- |
- |
- |
| 1-1/2 |
100 |
50 |
40 |
40 |
35 |
35 |
- |
- |
- |
| 2 |
100 |
60 |
50 |
40 |
40 |
35 |
- |
- |
- |
| 3 |
100 |
60 |
50 |
40 |
40 |
35 |
35 |
- |
- |
| 5 |
120 |
80 |
60 |
50 |
50 |
40 |
35 |
35 |
35 |
| 7-1/2 |
140 |
80 |
80 |
60 |
50 |
40 |
35 |
40 |
40 |
| 10 |
140 |
100 |
80 |
60 |
50 |
50 |
40 |
40 |
50 |
| 15 |
160 |
100 |
100 |
80 |
60 |
50 |
50 |
50 |
- |
| 20 |
180 |
120 |
100 |
80 |
60 |
60 |
50 |
60 |
- |
| 25 |
200 |
140 |
100 |
80 |
80 |
60 |
60 |
80 |
- |
| 30 |
200 |
140 |
100 |
100 |
80 |
60 |
60 |
- |
- |
| 40 |
240 |
160 |
120 |
100 |
80 |
80 |
80 |
- |
- |
| 50 |
240 |
180 |
140 |
100 |
100 |
80 |
100 |
- |
- |
| 60 |
- |
180 |
160 |
120 |
100 |
100 |
- |
- |
- |
| 75 |
- |
200 |
160 |
120 |
100 |
100 |
- |
- |
- |
| 100 |
- |
200 |
180 |
140 |
100 |
120 |
- |
- |
- |
| 125 |
- |
240 |
200 |
160 |
140 |
- |
- |
- |
- |
| 150 |
- |
- |
200 |
160 |
160 |
- |
- |
- |
- |
| 200 |
- |
- |
240 |
180 |
160 |
- |
- |
- |
- |
| 250 |
- |
- |
240 |
200 |
- |
- |
- |
- |
- |
Standard Roller Chain
Number of teeth = 15
https://www.senqcia.com/products/chain/use/roller/images/fig-rc_select-09.gif
| Chain number(No.) |
Pitch circle diameter(㎜) |
Outer diameter(㎜) |
| 25 |
30.54 |
34 |
| 35 |
45.81 |
51 |
| 40 |
61.08 |
67 |
| 50 |
76.35 |
84 |
| 60 |
91.62 |
101 |
| 80 |
122.17 |
135 |
| 100 |
152.71 |
168 |
| 120 |
183.25 |
202 |
| 140 |
213.79 |
236 |
| 160 |
244.33 |
269 |
| 180 |
274.87 |
303 |
| 200 |
305.42 |
337 |
| 240 |
366.50 |
404 |
Super Roller Chain
Number of Teeth = 15
https://www.senqcia.com/products/chain/use/roller/rc_select.html
| Chain number(No.) |
Pitch circle diameter(㎜) |
Outer diameter(㎜) |
| 80 |
122.17 |
135 |
| 100 |
152.71 |
168 |
| 120 |
183.25 |
202 |
| 140 |
213.79 |
236 |
| 160 |
244.33 |
269 |
| 200 |
305.42 |
337 |
| 240 |
366.50 |
404 |
[src: http://cremabru.com/chart/chain-size-chart/]
[src: http://cremabru.com/chart/chain-size-chart/]
[src:http://cremabru.com/chart/chain-size-chart/]
[src: http://cremabru.com/chart/chain-size-chart/]
https://www.senqcia.com/products/chain/use/roller/rc_select.html
Safety Coefficient
The safety coefficient (or safety factor, SF) is determined using the formula shown below, and it should generally be maintained within the 7 to 10 range. However, it is often necessary to raise the safety coefficient for certain usage conditions (i.e., chain speed, ambient temperature, loading method, etc.). Furthermore, any legal requirements must also be implemented at this time.
| Chain speed |
Safety coefficient |
| ~25m/min |
7 |
| 25~50m/min |
8 |
Table 4: Safety Coefficient (SF)
Example: Load W1 kgf applied to one of four chains used to suspend an object of weight W = 3,000kgf.
Chain Length: L (no. of links)
Chain Length: L (no. of links)
Where Cp is the inter-shaft distance expressed as a pitch;
N1 is the number of teeth on the small sprocket; and
N2 is the number of teeth on the large sprocket.
Chain Speed: v (m/min)
Where p is the chain pitch (㎜);
N is the number of teeth on the sprocket; and
r is the sprocket speed (rpm).
Chain Tensile Force for Rated Output: F (kgf)
Where kW is the rated output (kW) and v is the chain speed (m/min).
Corrected Transmission Performance: kW' (kW)
Where kW is the rated output (kW) and
αu is the service coefficient (from Table 1 on page 55).
Caution
The chain length L found using the formula presented here should be rounded off to an integer. Note that an offset link will be required when the chain length is an odd number; however, the tooth numbers and inter-shaft distance should be adjusted whenever possible to ensure that calculation produces an even number.
