Technical Data  Large size conveyor chain  Selection

11. Determine Chain Size

Divide the load (TMAX) acting on the chain as found in Table 3 by the number of strands, multiply this by the chain speed and temperature factors and the operating time factor to find correct chain load T’MAX. Select a chain with a maximum allowable load that satisfies this value. (Maximum allowable load value is a chain’s strength as calculated from Tsubaki design standards. )

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(Drag to move. )

Limit value that takes fatigue fracture and wear into consideration, assuming use under lubricated conditions. By determining a corrected chain tension based on a selection described in our catalog and using the chain below this value, no anomalies will occur early in operation. However, this does not apply when performance has deteriorated due to use under extreme environmental conditions.

Determine Chain Size
  • 1) When there are any regulations, guidelines, etc. affecting chain selection, select using that method and the allowable load selection method and choose the chain with more leeway.
  • 2) When a conveyor consists of multiple strands of chain, correct the number of strands in the above formula to allow for uneven loading of the chain.
  • 3) In the following applications, chain life will be greatly reduced. Please also refer to "Considerations for Special Environment" for your selection.1. Short distance conveyance of heavy loads 2. Exposure of chain to abrasive, adhesive, and corrosive material 3. High temperature/humidity environments 4. No lubrication
  • 4) Of the above considerations, when using a chain without lubrication be sure to include a leeway of 1.3 to 1.5 in light of wear life.

Table 8.Chain Speed Factor Kv

Chain speed m/min Speed coefficient Kv
20 or less 1.00
More than 20, up to 30 1.05
More than 30, up to 40 1.15
More than 40, up to 50 1.30
More than 50, up to 60 1.45

Note) Your criteria should be suitable operating conditions (clean with good lubrication).

Table 9.Chain Temperature Factor KT

Chain Temperature ℃ Temperature coefficient KT
DT・DTA AT・ATA GS・GSA
SS・SSA
100 or less 1.00 1.00 1.00
More than 100, up to 200 1.25 1.20 1.00
More than 200, up to 300 - 1.35※ 1.10
More than 300, up to 400 - 1.50※ 1.15※
  • ・Chain life will remarkably shorten when using chain in high temperatures at high speeds. (Marked with * in Table 9. )
  • ・Contact a Tsubaki representative when using outside these parameters.
  • ・Contact a Tsubaki representative when Kv x KT is 1.5x DT, DTA, AT, and ATA values.
  • ・Contact a Tsubaki representative when Kv x KT is 1.2x GS, GSA, SS, SSA values.
  • ・See each product page for chain operating temperature.

Table 10.Operating Time Factor Ks

Operating time per day Ks
10 hours or less 1.0
10 to 24 hours 1.2

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