R&M Materials Handling MANUAL CHAIN HOISTS - Manual (Page 16)

RM SERIES II I&M MANUAL/EN/02.11.11
10/20
This document and the information contained herein, is the exclusive property of R&M Materials Handling, Inc., 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 R&M Materials Handling, Inc.
Copyright © (2011) R&M Materials Handling, Inc. All rights reserved.
4 INSPECTION
4.1 Load Chain
Check the condition of the load chain regularly. Never use the equipment if any of its links are cracked or
deformed. Link wear must not exceed 10 % of the specified diameter of the load chain.
Measure the load chain over 5 links + 2 diameters as shown below in the Load Chain Technical Specification
section. Compare the measurement with the appropriate value of the Dimension over 5 links + 2 diameters
for a new load chain.
Replace the unit if the link wear exceeds 10 %.
4.2 Load Chain Technical Specification
Table 1. Load Chain Technical Specifications
Chain diameter x pitch (mm) 4 x 12 5 x 15 6 x 18 7.1 x 21 8 x 24 10 x 28 9 x 27
Grade 80 80 80 80 80 80 80
Class T T T T T T T
Minimum breaking strain (N/mm2) 900 900 900 900 900 900 900
Standard
DIN
5684
DIN 5684 DIN 5684 DIN 5684 DIN 5684 DIN 5684 DIN 5684
Safe load limit on 1 fall (kg) 250 500 1000 1500 2000 3000 2500
Breaking load (kN) 20 31.36 49 63.5 73.5 126 105
Min. total elongation over 7 links 10% 10% 10% 10% 10% 10% 10%
Dimension over 5 links + 2
diameters (mm)
68
(+0.28
/-0.15)
85
(+0.33/-0.16)
102
(+0/-0.6)
119.2
(+0/-0.8)
136
(+0.12/-0.66)
160
(+0.5/-0.3)
153
(+0.45/-0.25)
Dimension over 5 links + 2
diameters (inch)
2.677
(+0.011
/-0.005)
3.346
(+0.013/-0.006)
4.016
(+0/-0.024)
4.693
(+0/-0.031)
5.354
(+0.005/-0.026)
6.299
(+0.019/-0.012)
6.024
(+0.018/-0.010)
Weight (kg) per meter 0.235 0.370 0.524 0.732 0.934 1.378 1.156
Weight (lb) per foot 0.16 0.25 0.35 0.49 0.63 0.92 0.78