What is the difference between a fixed castor and a swivel castor?

A fixed castor has a non-rotating head, meaning the wheel can only roll in one direction ? forward and backward. This makes it ideal for the rear positions on trolleys and carts where straight-line tracking is required. A swivel castor, by contrast, rotates 360 degrees and is typically used at the front to allow steering and directional changes. Most trolley configurations use a combination of both types.

Is this castor suitable for use on tiled or wooden floors?

Yes. The grey rubber tyre at 85 Shore A hardness is appropriate for use on hard, smooth floor surfaces including concrete, tile, vinyl, and sealed timber. The rubber compound provides a degree of floor protection compared to harder wheel materials, reducing the risk of surface marking under normal operating conditions.

How do I calculate how many castors I need for my equipment?

Each castor in this range is rated at 60kg. To determine the number of castors required, divide the total loaded weight of your equipment by the individual castor load rating, then add a safety margin. For example, a trolley with a maximum load of 180kg would require a minimum of three 60kg-rated castors ? though four is the standard configuration for stability, with the total rated capacity then being 240kg.

What does the bolt hole pattern measurement mean, and how do I check compatibility?

The bolt hole pattern refers to the centre-to-centre distance between the fixing holes on the top plate. This castor has a hole pattern of 80mm (length) x 60mm (width), with 9mm diameter holes on a 100mm x 85mm plate. To check compatibility with your existing equipment, measure the distance between the centres of the fixing holes on your frame ? both lengthways and widthways ? and compare these to the castor plate dimensions listed above.