4. How to Select Chains
4.2 CONVEYOR CHAIN SELECTION There are five types of conveyor chains:
Identify conveyor specifications
a.Small pitch conveyor chain. b.Precision conveyor chain. c.Top chain. d.Free flow chain. e.Large pitch conveyor chain.
Conveyor types
To select any of these chains, use the procedure outlined in the flow chart (Figure 4.15). Chain tension is calculated based on the load size. In these five types, because often the objects conveyed on small pitch conveyor chains, precision conveyor chains, and top chains are light, sometimes you don’t have to check “allowable roller load.” Also, attachments are not usually installed on top chains and free flow chains, there- fore, you don’t need to check the attach- ment allowable load. 4.2.1 Check of Conditions for Selection You should check the items shown below: 1.Application conditions: application environment, indoor or outdoor, temperature, existence of foreign objects. 2.Conveyed objects: type (unit materials, bulk materials), abrasive, corrosive, temperature (high or low), dimension (for unit material), weight (unit material kg/unit; bulk material kg/m 3 ). 3. Maximum conveyance volume (unit materials, kg/conveyor length; bulk materials, tons/hour). 4. Method of conveyance: pushing with dog attachments, conveyed objects placed directly on the chains, etc.
Chain specifications
Roller type
Chain pitch
Number of sprocket teeth
Type of attachment
Calculate chain tension
Chain size
No
Check allowable load for roller
No
Yes
Check allowable load for attachment
Yes
Other special requirements, if any
END
Figure 4.15 Chain Selection Procedure (Conveyor)
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