R&M Materials Handling WIRE ROPE HOISTS Service - Manual (Page 68)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
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R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
5.25 Rope clamps
The rope is fixed to the rope drum with rope clamps. The number of rope clamps varies with the type of
hoist.
#
In addition to the clamps on the rope ends, there must always be at least two full turns of rope on
the drum when the hook is at its lowest position in order to provide friction.
c_rdrc1a
1. Rope
2. Rope drum
3. Rope clamps
4. Friction turns
5.25.1 Service
• Check that the rope clamp-bolts are tight.
• Ensure there are at least two friction turns when the hook is at the lowest position.
• Make sure the rope end protrudes from the last clamp a distance of 5xd.
5.26 Drum Brake
The drum brake has been designed as an extra safety device to the hoist. To obtain the maximum safety,
it operates mechanically and applies directly to the rope drum. Drum brake has three different
configurations, i.e. holding brake, overspeed brake and a construction with both holding and overspeed
brake functions.
!
Drum brakes are tested and adjusted by the hoist manufacturer prior to delivery. Only
qualified personnel, authorised by the manufacturer may install, adjust and service the drum
brake.
!
Service and maintenance of the drum brake must be done at regular intervals as
recommended by the manufacturer.