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

A fixed castor rolls in one direction only, providing straight-line movement and directional stability — ideal for the rear wheels of trolleys and carts. A swivel castor rotates 360 degrees, allowing the equipment to be steered and manoeuvred in any direction. For best results, fixed and swivel castors are typically used together on the same piece of equipment.

Is a nylon wheel suitable for use on hard floors?

Yes. Nylon wheels are well suited to smooth, hard floor surfaces including concrete, ceramic tile, vinyl, and laminate. They offer low rolling resistance and good durability under regular use. For softer or more delicate floor surfaces — such as hardwood or polished stone — a rubber-tyred wheel may be more appropriate to prevent surface marking.

How do I calculate the correct load capacity for my application?

To calculate the required load capacity per castor, divide the total weight of the loaded equipment by the number of castors, then apply a safety factor of approximately 1.3 to 1.5. For example, a trolley with a maximum load of 150kg fitted with four castors would require each castor to be rated to at least 50kg — this 65kg castor comfortably exceeds that requirement. Note that the combined maximum load for a set of four of these castors is 195kg.

How is this castor mounted, and what fixings are required?

This castor is mounted using a 4-bolt top plate. The plate measures 60mm x 67mm with hole centres of 48mm and 38mm, and a bolt hole diameter of 6mm. Standard M6 bolts, washers, and nuts are required for installation (not included). Ensure the mounting surface is flat, rigid, and capable of supporting the intended load before fitting.