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Castor Maintenance

Castor Maintenance

A General Guide for Maintenance & Fitting of Castors

Under average conditions of intermittent use, Fallshaw castors will run for 5 years without maintenance. If the castors are in constant use, this reduces to 1 year.

Correct Fitting of Castors:

  • Castors will not swivel properly and track to one side unless they are mounted vertically.
  • Heavy trolleys need plate mountings, but the base of the trolley must be strong enough to withstand the load.
  • You should retighten castors after 3 months of use, and annually after that. Tighten fittings firmly, but do not over-tighten.

Castor Tube Fittings:

  • Medium duty castors are often mounted into tubular legs, but again, it is important that these legs stay vertical.
  • The leg should never extend more than 125mm below the nearest support, and the tube should be at least 1.4mm thick.
  • Never put a round expanding fitting into a square tube..
  • When fitting expanding stem castors, make sure that the fitting is fully inserted into the tube before tightening it up.

Castor Greasing:

Grease in both the swivel head race and the wheel serve three purposes:

  • It prevents rusting of the balls and raceways
  • Prevents galling (a form of wear caused by adhesion between sliding surfaces)
  • It reduces noise
    • Turn the trolley upside down and remove the wheels.
    • Re-grease the head, either through a grease nipple if fitted, or by a needle tip fitting on a grease gun. You will need to lift the seal on the heavier range of castors with a screwdriver. 
    • Check the wear of the axle bushing. Reuse if not heavily worn, otherwise replace. Smear about a teaspoon of grease along the inside of the wheel bearing with your finger, taking care to force the grease up into the rollers and reassemble.
    • Be careful of the lip seal on the wheel as you reinsert the axle bushing into the roller bearing wheels. Make sure the axle bushing is clean as you reinsert it.
    • Reassemble the wheel into the castor. Replace washer where fitted. A drop of Locktite High Assembly Strength solution on the axle thread is a good precaution.
    • Use a No.2 bearing grease (not sodium based).

Castor Wheel Bearings:

  • Any slackness present in plain bearings or roller bearings can often be improved by replacing the axle bushing or the bearings.
  • Generally re-greasing B type bearings is enough, though they can also be replaced if necessary.
  • Sealed precision Q type bearings seldom wear sufficiently enough to need attention.
 

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