Bolt Hole Castors

A range of light duty, pressed steel swivel shopping trolley castors with single bolt hole fittings. Can also be used as retractable castors or as castors for mobile steps.
Black polypropylene or Grey rubber wheels available in 50mm, 75mm & 100mm wheel sizes. Expanding tubular fittings, spring fittings and braked versions are available. Ideal for use as institutional castors, hospital castors, laboratory castors and spring loaded castors. Can also be supplied with anti-static (electrically conductive) wheels.

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Ross Promise
Bolt Hole Castors

310 Series

Size: 50mm, 75mm & 100mm
Light duty pressed steel swivel castors with 10mm bolt holes. Can be fitted with grey non-marking Rubber Tyred or Black Polypropylene wheels. Suitable for a wide range of light duty applications.

 
Castor Reference and Load Capacity
Grey Rubber Castor
Wheel Diam. Tread Width Plated Finish Castor Height Swivel Radius Swivel Race Diam. Bolt Diameter Grey Rubber Black Polypropylene
2"
50mm		 22mm Zinc 71mm 47mm 41mm *10mm 50-310-R
60kg		 50-310-P
65kg
3"
75mm		 **23mm Zinc 101mm 61mm 41mm *10mm 75-310-R
70kg		 75-310-P
75kg
4"
100mm		 **26mm Zinc 122mm 83mm 41mm *10mm 100-310-R
80kg		 100-310-P
85kg

 

An alternative 100mm and 125mm castor is available in a chrome plated finish. Details on request.
* Bolt hole fitting requires a 20mm washer and a 10mm bolt.
** The 3” and 4” Polypropylene wheels have 22mm tread widths.
3" ANTI-STATIC WHEELS AVAILABLE TO SPECIAL ORDER

 

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OPTIONAL EXTRAS

Round Expanding Tubular Adaptor

 

Expanding adaptors available for round tubing in the following sizes:

 

Overall height of castors increased by 3mm.

To order add suffix detailed in table to swivel castor reference.
 
Instyitutional Castor
 
Expander Range Ref.
18 - 19.5mm R-18
19.5 - 21.7mm R-20
21.7 - 24.5mm R-22
24.5 - 27mm R-25
27mm - 29.5mm R-27
29.5 - 32mm R-30
Square Expanding Tubular Adaptor

 

Expanding adaptors available for square tubing in the following sizes:

 

Overall height of castors increased by 3mm.

 

To order add suffix detailed in table to swivel castor reference.
 
Instyitutional Castor
 
Expander Range Ref.
20 - 22mm S-20
22 - 25mm S-22
25 - 28mm S-25
29 - 32mm S-29
36 - 38mm S-36
Combined Swivel and Wheel Brake (all sizes)

 

Simultaneously brakes both the swivel head and wheel. Release is affected by the trip pedal. To order add suffix 'SWB' to castor reference.

 

Swivel Radius
The swivel radius is increased when brakes are fitted.

 

50mm wheels: increased by 33mm
75mm wheels: increased by 30mm
100mm wheels: increased by 23mm

 

Institutional Castor
Spring Loaded Castor (For Mobile Steps)

 

Spring fitting for use with a 75mm castors, with either rubber tyred or polypropylene wheels.
The spring fitting is inserted into a 1” outside diameter sleeve and compresses with a load of 16kg. Maximum load capacity per castor is 70kg.

 

Spring Loaded Castor

 

To order, add the following suffix SA1 to the castor reference

 

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