DID 60 standard roller chain - Big Bike Webshop
DID 60 standard roller chain - Big Bike Webshop
DID 60 standard roller chain - Big Bike Webshop
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Technical Data Chain Selection<br />
Coefficient of Friction<br />
Value of coefficient of friction f1<br />
Table 1<br />
Coefficient of friction for <strong>chain</strong>s with<br />
<strong>roller</strong>s running on guide rails<br />
Note: 1.The value may depend on the<br />
service temperature, etc.<br />
2.The listed values are for ambient<br />
temperature.<br />
Table 2<br />
Coefficient of friction for <strong>chain</strong>s with<br />
plates sliding on guide rails<br />
Roller dia. With lubrication Without lubrication<br />
D50 0.15 0.20<br />
50D65 0.14 0.19<br />
65D75 0.13 0.18<br />
75D100 0.12 0.17<br />
100D 0.11 0.16<br />
Without <strong>roller</strong>s (when bushings slide on a rail) 0.20.3 0.300.45<br />
<br />
0.0350.050<br />
Temperature (°C) With lubrication Without lubrication<br />
Ambient temperature ~ 400 0.20 0.30<br />
400<strong>60</strong>0 0.30 0.35<br />
<strong>60</strong>0800 0.35 0.40<br />
8001000 0.45<br />
Value of coefficient of friction f2<br />
Table 3<br />
Coefficient of friction with loads and<br />
bottom and/ or side plates<br />
Note: Figure f2 is changed by the condition<br />
of grading and/ or humidity<br />
Load to be conveyed<br />
Coal<br />
Coke<br />
Ash<br />
Sand<br />
Sandstone<br />
Ore<br />
Cement<br />
Cereal<br />
Limestone<br />
f2<br />
0.300.70<br />
0.350.70<br />
0.450.65<br />
0.550.90<br />
0.550.70<br />
0.450.70<br />
0.<strong>60</strong>0.75<br />
0.350.45<br />
0.350.55<br />
Safety Factor and Determination of Chain Size<br />
Technical Data<br />
Chain Selection<br />
Multiply the <strong>chain</strong> tension calculated in 5-1-2 by the safety<br />
factor corresponding to the <strong>chain</strong> speed and by the service<br />
factor to obtain the required strength of the <strong>chain</strong>. If the<br />
calculated strength does not satisfy <strong>chain</strong> tensile strength,<br />
select a <strong>chain</strong> one step higher in strength, or a strong type<br />
<strong>chain</strong>, and re-calculate.<br />
Select a <strong>chain</strong> size that fulfills the following condition:<br />
Average tensile strength <br />
Calculated <strong>chain</strong> tension Ks Ke<br />
The service factor under good service conditions is set<br />
as 1.0. Refer to the table on the right for other service<br />
conditions. The values are given considering possible<br />
shock loads, service environment, lubrication condition,<br />
service time per day, etc.<br />
(Reference) Good service conditions refer to the following:<br />
1. The load is mostly constant and uniform.<br />
2. There are no shock loads when loading and unloading.<br />
3. Service environment is good. (Close to ambient<br />
temperature without abrasive or corrosive factors)<br />
4. Minimal wear due to appropriate lubrication.<br />
Safety factor<br />
Ks by <strong>chain</strong><br />
speed<br />
Ks<br />
Service<br />
factor<br />
Ke<br />
Chain speed Safety factor Ks<br />
30m/min or less<br />
3040m/min<br />
4050m/min<br />
50<strong>60</strong>m/min<br />
7 or more<br />
8 or more<br />
9 or more<br />
10 or more<br />
Service factor Ke<br />
Service time per day<br />
10 hours or less 10 ~24 hours<br />
Good 1.0 1.2<br />
Fair 1.2 1.4<br />
Bad 1.52.0 1.82.5<br />
In any special environment (when the temperature of<br />
<strong>chain</strong> is higher than 200°C, or wet or abrasive or corrosive<br />
articles are conveyed, etc.), the environment must be<br />
carefully examined when determining <strong>chain</strong> size. Consult<br />
us in such cases.<br />
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