2. Small Pitch Conveyor Chains
(2) With a crossrod over two chains, the load from the attachments is distributed to both sides of plates equally. The chain can fully use its strength and not twist. (3) It is easy to change, maintain, and adjust attachments. Sprockets Standard sprockets are used for the small pitch series. For double pitch series, standard sprockets for Double Pitch Roller Chain are used. Selection and Handling (1) These chains are selected using the same methods as other conveyor chains. Care must be taken since the maximum allowable tension of hollow pin chains is less than that of the same-sized standard chains. (2) Retaining rings are used on the pin head for connecting links. When an attachment link is to be added to an HP connecting link, the attachment link pin must be longer than those used in the rest of the chain. (3) The pin is not riveted in this chain. The lower maximum allowable load and the high rigidity of the pin make it difficult for the link plates to come off. (4) The small pitch series and the S-roller (standard) types in the double pitch series are bushing chains, which do not have rollers.
Table 2.3 Sizes for Hollow Pin Chain 1
Pin Minimum
Maximum Allowable Load (kN)
Inner
Chain No.
Pitch 12.70 15.875
Diameter (mm)
RS40HP RS50HP RS60HP RS80HP
4.00 5.12 5.99 8.02
1.76 3.14 4.21 7.64
19.05 25.40
1 These dimensions are from Tsubaki. Other manufacturers’products may vary.
Table 2.4 Sizes for Double Pitch Hollow Pin Chain 1
Pin Minimum
Maximum Allowable Load (kN)
Inner
Chain No. RF2040HP RF2050HP RF2060HP RF2080HP
Pitch 25.40 31.75 38.10 50.80
Diameter (mm)
4.00 5.12 5.99 8.02
1.76 3.14 4.21 7.64
1 These dimensions are from Tsubaki. Other manufacturers’products may vary.
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