Castor Jargon Made Easy
The castor industry has lots of terminologies when it comes to castor wheels. We’re hoping the below will help everyone to understand the terminology.
- Brake – The brake is an integral part to a castor which is being used to stay in a static position. There are several options when it comes to having a brake on your castor below is a list of examples of the brakes we can offer.
- Front brake – Total brake which locks the wheel and bracket rotation when applied. This is the most popular brake position we find.
- Rear brake – Total brake which locks the wheel and bracket rotation when applied. The only difference between this and the front brake is the position of the pedal. The positional of the pedal is within the operators reach when used in a towing application.
- Centralised brake – The centralised brake system is designed so that the brake can be engaged on two brackets at the same time using a connection rod and just one lock pedal.
- Dead man brake – The dead man brake is designed so that the brake is released when pressure is placed on the centre pin. The solution is popular within the medical industry.
- Carrying capacity – The Carrying capacity is measured by the maximum value that a wheel/bracket can be subjected to without reducing its operating efficiency.
- Expander – Expanders are connected to a bolt hole castor and fit into the leg of the application to hold the application in place available in both round and square designs to fit a variety of internal leg diameters.
- Overall height – The overall height is the height between the top of the plate and the bottom of the wheel. Getting the correct height is key when replacing a single castor within a set of castors.
- Offset – The offset is the centre of the ball race (centre of the top plate) to the outer most part of the castor i.e wheel on a swivel castor and brake on a swivel braked castor.
- Plate fitting – There are two options for plate fittings bolt hole and a 4 bolt fitting below are an example of the fittings.
- Top plate – The top plate design is connected to the application by 4 bolts. The standard hole centres supplied via Revolution castors for these castors are 80 x 60mm, 105 x 80mm and 140 x 105mm. The 4 bolt fitting castor can carry a higher carrying capacity than the bolt hole castor below.
- Bolt hole – The bolt hole design is connected to the application by a single bolt. The bolt hole castors via Revolution are offered in 12, 16 and 20mm variants. The castor can have an expander fitted to it.