Chain size
d * t
4.1 x 12.1
5.1 x 15.1
7.2 x 21.1
2)
t = Overall length of 1 chain link, measured on the inside.
3)
d
m
= (d1 + d2) / 2.
NOTE
Use only a "knife-edge" caliper or a tool that is sold by the Crane Part Center for
measuring the link thickness. Using the recommended tools helps you to make sure
that you measure the full pitch length. Not measuring the the full pitch length can
lead to a false reading result.
4. Measure the elongation of the chain.
Measure the pitch over 11 links (P) at different sections of the chain.
NOTE
A 2% elongation according to ISO 7592.
Chain elongation measurement criteria
Chain size
d * t
4.1 x 12.1
5.1 x 15.1
7.2 x 21.1
d
n
[mm]
4.1
5.1
7.2
P max [mm]
144.7
180.3
253
1)
d
n
= Nominal link thickness dimension.
2)
P = Pitch over 11 links.
NOTE
If the chain wear exceeds the allowed limits for the chain wear measurement, replace the
chain immediately. Check also the wear on the chain guide and the chain sprocket. If
necessary, replace the chain guide and chain sprocket.
NOTE
If any chain link is in some way defective, replace the chain.
NOTE
A chain cannot be determined as safe based only on the wear measurement and chain
replacement criteria. Check the condition of the chain also visually. The visual checks
may show that the chain is unsafe or must be replaced, even if the replacement is not
necessary based on the chain elongation measurement criteria.
NOTE
A repetitive stop and start at the same point of the chain causes increased wear on the
chain links 2-3 in the chain sprocket.
OWNER’S MANUAL
This document and the information contained herein, is the exclusive property of Verlinde S.A.S and represents a non-
public, confidential and proprietary trade secret that may not be reproduced, disclosed to third parties, altered or
otherwise employed in any manner whatsoever without the express written consent of Verlinde S.A.S. Copyright 2020
© Verlinde S.A.S. All rights reserved.
6/2020
