ANSI ICWM: 2012 The ICWM Performance Standard for Casters and Wheels

Originally approved as an American National Standard in 2004 and published in 2005, this 2012 update is intended to provide manufacturers, specifiers and users with a common basis for evaluating the safety, durability, structural adequacy and technical requirements for group specific casters and wheels.
Purchase Standard

The Ergonomics of Material Handling

This White Paper provides an overview of the issues involved in manual pushing and pulling, including ergonomics; cart, wheel, and caster design; and important operating environment factors.
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Casters Do They Matter? Making The Right Decision
This presentation will detail the complexity of selecting the most efficient caster design for a wide range of application demands.

What are industrial casters and wheels?

A caster is a complete wheel and horn assembly which, when attached to a piece of equipment, allows that item to move.

There are two basic types of casters:

two basic types of casters: rigid and swivel

Caster wheels come in a wide variety of materials, sizes and treads.   The type and size of wheels chosen depends on:

  • the total weight of the load;
  • the floor surface and its condition;
  • any unusual environmental conditions, such as moisture, extreme heat or cold;
  • exposure to chemicals, blood, fats, oil, salt, etc.;
  • shock loading;
  • noise limitations;
  • speeds and duration.

Here are examples of 8 types of bearings used in the manufacturing on quality casters and wheels:

Manufacturers provide many accessories for specific applications:

  • Thread Guards prevent thread and material from clogging between the hub of the wheel and the inside of the fork. They remain stationary while the wheel revolves.

  • Grease Seals provide protection for swivel ball races and wheel bearings by keeping lubricant in and dirt out.

  • Swivel Locks are devices to prevent the rotation of the housing rig.

  • Wheel Brakes lock a caster and wheel by exerting hand or pressure on an operating level, forcing a brake shoe or band against the wheel hub or tread surface.

  • Swivel Lock/Wheel Brake eliminates the necessity of separate units for locking the swivel and the wheel.

  • Floor Lock attaches to the undercarriage of a truck to lock it in position.

  • Miscellaneous Accessories steering arms, rybar tubes, rubber bumper guards, shimmy dampeners and other items are available for specific applications. Consult your manufacturer.

The user is responsible for proper maintenance and operation of equipment. Some equipment is abused or subjected to unreasonable demands. Don't overload or drop loads on carts or trucks. High speeds on rough floors can create severe impact or shock loads that may cause wheel or equipment failure. Periodically examine equipment for:

  • Frame and Fasteners
    Tighten loose bolts and nuts and look for broken welds or deck boards. Look for frame distortion due to overloads or impact loads. A distorted frame can cause premature wheel failure because of abnormal loads on one or two casters. If casters are stem type, bolted or riveted in place, make sure the legs of the equipment are not bent and mounting bolts are properly secured. Always use lock nuts or lock washers in mounting casters. Be sure casters with expanding adapters in tubular equipment are held firmly in place.

  • Lubrication
    Wheel and swivel bearings last longer if lubricated regularly. Some lube applied to friction points on the wheel hub, washer and leg surfaces of straight roller bearing systems reduces drag and improves reliability. Normal conditions may warrant lubrication every six months, but once a month may be necessary in a corrosive application. Cart washings may necessitate lubrication after each wash.

  • Wheels
    Check for visible points of tread wear. Flat spots may indicate foreign material, such as string, thread, etc., causing wheels to bind. Thread guards will delay build-up of such materials. Loose casters or frozen wheels are other causes of this problem. Replace wheel and/or caster to avoid erratic rolling. After inspecting and making corrections, be sure axle nut is properly tightened. Use lock washers or nuts on all axles. Tighten loose axle immediately to avoid becoming cocked in the caster housing/rig and locking up. Keep replacement wheels and bearings on hand to avoid costly downtime.

  • Casters
    If swivel assembly is loose, it may need to be replaced. If caster has a king bolt nut, make sure it is securely fastened. If swivel assembly does not turn freely, check raceways for corrosion or dirt. If equipment has rigid casters at one end, make sure caster housing/rig is not bent.

Upcoming Meetings


ICWM Managing Executive


Jeff Woroniecki

704-676-1190

Leadership


President
William LeMeur
Superior Tire & Rubber Corp.

Vice-President
Darrell Metzger
Jarvis Caster Company/Colson Group

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