Symbols
The world of wheels and castors makes universal use of symbols, which represent the most useful dimensions of the product. See table below:
 |
Swivel castor |  |
Wheel diameter-Ø |  |
Fixing bolt diameter-Ø |
 |
Brake swivel radius |
 |
Tread width |  |
Hub width |
 |
Bushing |
 |
Overall height |  |
Bore diameter-Ø |
 |
Plain bearing |  |
Offset |  |
Load capacity |
 |
Roller bearing |  |
Single bolt hole-Ø |  |
2 Taper roller bearings |
 |
1 Central ball bearing |  |
Top plate dimensions |
 |
Fixed castor |
 |
2 Ball bearings |  |
Bolt hole spacing |