R&M Materials Handling WIRE ROPE HOISTS Service User Manual
Page 95
R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
95/130
R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
Rotation resistant ropes have more outer strands than standard ropes. Outer strands have left hand lay,
while inner strands are in right hand lay.
5.30.2 Service
• Inspect the rope. Regular rope inspection and maintenance shall be carried out according to the
guideline instructions below and according to international standard ISO 4309:2004.
• Lubricate the rope with suitable lubrication. Lubricant for wire rope shall be water resistant, non-
adhesive, transparent thin oil, which is able to penetrate in the rope.
!
The rope shall be changed before the limits have been reached. Change the rope if there is a
risk that limits are reached before the next examination.
5.30.2.1 Periodical
examinations
Visual deformations and damages in the rope shall be inspected daily by the user. Wire ropes shall be
inspected by authorized service personnel at least every 12 months or 10% SWP.
The inspection intervals should be shortened when:
-
The hoist is used in heavy duty or process use (e.g. duty class M6 or higher, papermill cranes etc.)
-
The hoist is used under harsh conditions (e.g. extreme temperatures, excessive dirt/dust or outdoors)
-
Previous examinations indicated a high rate of wear.
In case of doubts, please contact the manufacturer for advice.
5.30.2.2 Discard
criterias
Maximum number of broken wires in outer strands
Examination of the broken wires shall be made at least in the rope area, which has the most bendings
over the rope sheaves during normal operation, and at the rope end near the wedge housing. Before the
examination of broken wires, the examination areas shall be carefully cleaned. The wire breaks are better
visible if the rope is lightly bended.
#
The internal examination of wire rope shall not be done in the regular maintenance, unless the
person is trained for that examination (ISO4309 Annex D).
Standard Ropes and Heavy Duty Ropes
Maximum wire breaks
Rope diam.
mm
Detected length mm
Duty class M4
Duty class M5, M6
40 3
6
6.2 - 6.5
200 6
12
50 5 10
8
250 10
20
70 5 10
11
350 10
20
90 8 16
15
450 16
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