To ensure that you obtain the exact Revvo product you require, we employ reference codes that are used at all stages of production. These define your requirements precisely. When ordering, you can be assured of receiving the right wheel or caster every time by using our simple system.

The coding is a form of shorthand, using letters as abbreviations of words, e.g., RU for Rubber tire, NY for Nylon, S for Swivel Seal. Caster prefixes are: T= Top Plate; B = Bolt Hole (Stem) Fixing; S = Swivel Caster; F = Fixed (Rigid) Caster. Numbers are used to give wheel diameters and bearing types.

The maximum length of any product code is 17 characters, but in many cases, the code will be shorter. For example, the code for a basic caster with a standard top plate will not require the parts of the code referring to fitting and features, reducing the reference to 10 characters.

Please also note that all caster references include the reference of the wheel fitted. However, when ordering a wheel, only the wheel reference part of the code is used, reducing the reference to 7 characters.

The example below shows all the characters in use and depicts relevant parts of the complete caster assembly – also shown is a complete wheel reference.

Plain Bore (Code 0 or P) Consists of an axle hole machined or molded in the wheel center, usually of cast iron or nylon. Suitable for light loads or where low rolling friction is not important.	Roller Bearing (Code 1 or R) The most popular low-cost, easy-movement bearing. Widely used to reduce the manual effort to move heavy loads. Roller bearings need no adjustment on the axle.	Precision Ball (Code 2 or B) Precision ball bearings with a spacer in between. Offers very low friction. Shielded to retain the grease and exclude grit. Inner bearing races need to be clamped endwise on the assembly.	Taper Roller (Code 3 or T) Precision taper bearing, metal seals, and spacing washers. The best bearing type for power towing applications. The axle assembly must provide for adjusting the bearing cones.