R&M Materials Handling ELECTRIC CHAIN HOISTS LoadMate Chain Hoist LM 16-20-25 - Manual (Page 29)

LM16-20-25 I&M MANUAL/EN/11.30.2010
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Figure 12. Chain Dimensions
11 t
t
t
P25004
Ød
Measure the following chain dimensions at several points on chain: ( Figure 12)
Dimensions of one link ( d x t ) where, d = diameter and t = pitch
Length over 11 links ( 11 t )
Replace load chain if any one of these dimensions exceeds maximum allowed wear:
LM 16 LM 20 / 25
Maximum allowed wear: 9.0 x 27.0 chain 11.3 x 31.0
Minimum link diameter allowed (d): 0.319” [8.1 mm] 0.398” [10.1 mm]
Maximum pitch allowed (t): 1.114” [28.3 mm] 1.280” [32.5mm]
Maximum length allowed (11t): 11.929” [300 mm] 13.681” [347.5 mm]
NOTE: If load chain needs replaced, then inspect chain guide and chain (load) wheel on
hoist and idler sprocket in 2-fall load block for excessive wear. A chain sprocket showing
evidence of scored pockets or sharp edges generated from wear SHALL be replaced. A
worn chain sprocket or idler sprocket can greatly reduce the life of load chain.