Swivel Castors
Swivel Castors and wheels can swivel 360 degrees about the vertical axis (see figure below). They consist of a housing and a caster wheel. The housing itself is made up of a plate fitting, swivel bearings and a yoke. The Yoke is often referred to as the castor's frame (see figure below).The plate fitting determines how the... castor is going to be attached to the equipment. It is usually either a single bolt hole fitting or a plate fixing which is generally square, rectangular or triangular. Plate fittings are usually bolted to equipment so knowing your required bolt hole centres is important. The Swivel Head consists of a ball race and a number of ball bearings that roll within it. Swivel Castors can either have a single ball race or a double ball race. They perform the same function. The double ball race was developed for medium and heavy applications. This is because they are compact, perform well under static and dynamic loads and provide excellent steerability.
Swivel castors can be fitting with locks which lock (brake) wither the wheel or the swivel head or both. See Brake Castors.
Swivel Castor Components
Swivel Castor Offset
The Swivel Castor's offset it the distance from the swivel axis to the centre of the wheel (where it is secured to the castor frame). It is the reason a swivel castor will go in the direction you want it to go regardless its starting direction. The offset and castor wheel's diameter make up the swivel radius where the swivel radius = Offset + (Wheel Diameter / 2).
This is the radius of circle described but the outer dimension of the wheel swivelling around the vertical axis. Basically, this is important because it tells you how much room is needed for the swivel caster to swivel. Furthermore, the general rule is the bigger the offset the better the castor's running performance but the lower the weight it can carry. Read More
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In StockSwivel Castor, 250kg Capacity | 100mm Cast Iron Wheel with Roller Bearing (422CIB)
£31.84100mm Swivel Castor (Flexello) with 80x60mm Fixing... Read More Bolt Hole Centres. This Pressed Steel Castor is Fitted with Cast Iron Wheel with Roller Bearing. 250kg Load Capacity- In Stock
Swivel Castor, 250mm, 615kg Capacity, Rubber Tyre Wheel, Ball Bearing, (HKS25025341)
£156.81250mm Top Plate Swivel Castor (Fabricated Steel) w... Read Moreith 105X80mm Fixing Bolt Hole Centres. Rubber Tyre / Cast Iron Centre Wheel with Ball Bearing. Load Capacity = 615kg - In Stock
Swivel Castor, 75mm, 140kg Capacity, Nylon Wheel, Plain Bore (MSE075NY)
£7.2175mm Medium Duty Top Plate Swivel Castor. Nylon Wh... Read Moreeel and Plain Bore. Load Capacity = 140kgThis castor has a 105x80mm Top Plate with 80mm x 60mm Bolt Hole Centres. The overall height is 95mm.The Nylon castor wheel is a hard tread made from quality nylon. It will not damage or mark concrete floors and is not susceptible to picking up floor debris and swarf. Nylon is a popular wheel choice because it is light weight and has a high load capacity relative to other wheel materials of the same size. It is not affected by water and is insensitive to many chemicals apart from acids.
