The Complete Guide to Chain

6.1.3.3 Disadvantages

  1. Larger pitch chain increases the size of the equipment, which may be considered an obstacle.
  2. To keep the size of the equipment small when using large pitch chain, sprockets with small numbers of teeth are commonly used. This contributes to greater speed variation of the chain.
  3. Although applications can run as fast as 330 m/min., normally large pitch chains should be used at low speeds.

Large pitch conveyor chains are generally more costly than smaller pitch roller chains, and in the case that the system or the chain does not function as designed, it may be more difficult to resolve these issues than with smaller chains.

You are ultimately responsible for selecting the proper chain, so follow all the steps in the selection process, and consider what effects the system or the conveyed materials have on the chain, in strength, wear, corrosion, etc. As stipulated in previous sections of this book, the calculations of bending and twisting strength of chain attachments, large or small, are the same as with other machine elements.

Work with a chain manufacturer who has a good reputation for quality and safety; who offers knowledge, expertise, and superior service; and who manufactures quality product. Remember, not all chains and attachments are listed in the catalog, as it would be impractical to publish all specifications and information.

Table 6.3 Relationship of Materials and Components
Application → Greater Function Features
Normal
Environment		 For Regular DT Basic Series
  • Most Popular and Economical
For Wear Resistance
  • GT
 Wear Resistance Between Bushing and Roller
  • Greater Wear Life Between Bushing and Roller
  • AT
 Reinforced Series
  • Compact Design
  • Popular Series
  • CT
 Wear Resistance Between Pin and Bushing
  • Greater Wear Life Between Pin and Bushing
  • For Cement Conveyor
  • For Bulk Conveyor
  • BT
 Reinforced Series
For Heavy-weight Objects
  • B-DT, B-AT
 Bearing Roller Series
  • Good For Directly Conveying on the Chain
  • For Compact Design (Power and Space Saving)
  • For Unit Conveyor
For High-Accuracy Positioning
  • RFN
 Bearing Bush Series
  • For High Accuracy
  • Positioning with Indexing Drive on Unit Conveyor
For Low Noise and No-Lube
  • DTP
 Plastic Roller Series
  • Low Noise, Clean, and Light Weight
  • RFS-DTP
 Plastic Roller and Plastic Sleeve Series
  • No-Lube
Corrosive
and
High
Temperature
Environment		 For Corrosion Resistance and Heat Resistance
  • NT
 400 Stainless Steel Series
  • Corrosion Resistance, Heat Resistance, and Cold Resistance
  • PT
 Reinforced 400 Stainless Steel Series
  • ST
 300 Stainless Steel Series
Light
Corrosive
Environment		 For Partial Corrosion Resistance
  • MT
 Corrosion and Wear Resistance Between Pin and Bushing
  • Incidental Water Contact
  • RT
 Corrosion and Wear Resistance Between Pin, Bushing, and Roller
  • Incidental Water Contact
  • Good For Conveying Abrasive Bulk Materials
  • YT
 Reinforced Series
For Low Noise and No-Lube
  • STP
 300 Stainless Steel Series Plastic Roller Series
  • Clean, Low Noise, Corrosion Resistance
  • Light Weight
  • RFS-STP
 300 Stainless Steel Series Plastic Sleeve Series
  • No-Lube

NOTE: 400 Stainless Steel Series Chain May Rust Depending on Environmental Conditions

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