Basics
5. Length of the conveyor, shaft center distance, vertical rise, general layout. 6. The chain speed (m/min.). 7. Number of the chain strands, interval length. 8. The chain pitch, attachment spacing and type. 9. The number of sprocket teeth, or pitch diameter. 10. Working hours (hours/day, hours/year). 11. Lubrication. 12. Motor: AC or DC, kW 3 number of motors. 13. Noise: If there is any noise constraint, use a larger number of sprocket teeth. Consult the manufacturer. Some Additional Thoughts You can make your decision on point 4 after reviewing the points in Basics Section 4.2.2, Conveyor Type Selection. Make sure to follow the procedure carefully. Point 7 is more difficult to determine than it looks; the materials being con- veyed impact the decision. Because the chain sizes and configuration may change as the design is developed, you must consider this point carefully. Consider these examples: • If you convey fixed-sized pallets directly on chain, you usually need two sets of chains. But if the pallet is not rigid enough, you should include a third chain between the two outer chains. • If you convey different-sized pipes or similar items directly on chain, you must consider the shortest length so that at least two chains are supporting the product on line, and determine the appropriate number of chains so that the chains are equally loaded. Points 8, 9, and 12 may be revised as you proceed with the selection process since the chain sizes are usually determined by roller load, so make a prelimi- nary selection first. 4.2.2 Conveyor Type Selection According to conveyed object type (unit or bulk materials), typical chain conveyor types are sorted as shown on the next page. Therefore, you should choose the formation from among these. In Figure 4.16, the available chain types are abbreviated below. These abbre- viations mean: RF: Double pitch roller chain, RF conveyor chain. Plastic roller and plastic sleeve chain may be used to convey unit materials. RS: RS attachment chain RF-B: RF bearing roller conveyor chain RFN: Bearing bush chain RFD: Deep link chain VR: DOUBLE PLUS ® chain
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