Castors and Wheels 2008
| Main | |
| Gate Castors | |
| Heavy Duty Swivel/Braked | |
| Heavy Duty Swivel | |
| Heavy Duty Fixed | |
| Bolt Hole castors | |
| Bolt Hole with Brake | |
| High Temperature | |
| Light Duty Swivel/Braked | |
| Light Duty Swivel | |
| Light Duty Fixed | |
| Stainless Steel Swivel | |
| Stainless Steel Fixed | |
| Stainless Steel Swivel/Braked | |
| Jacking Castors | |
| Medium Duty Swivel | |
| Medium Duty Fixed | |
| Medium Duty Swivel and Brake | |
| Nylon Wheels Heavy Duty | |
| Nylon Wheels with Rubber Tyres | |
| Pnuematic Wheels | |
| Rubber Tyres | |
| Polyurethane Tyres H/D Wheels | |
| Polyurethane Tyres on Cast Iron | |
| Polyurethane Standard Wheels | |
| Nylon Wheels | |
Choosing a Castor & WheelMountingsToplates with four bolt holes spread the load over the swivel head and are the commonest fixing. Single bolt hole with a fastener through the centre of the swivel head are limited to loads up to 320 kilogrammes. Bolt hole castors can be fitted with threaded stems and round or square expanding sockets to fit into tubes. LoadingsWhen assessing the load rating of a castor remember that a smooth floor ? free from cracks, uneven joints, gullies etc ? will be needed to overcome the shock loads created by the defect. The configuration of the castors on the trolley also makes a difference to load calculations. Because floors are not perfectly flat, as a trolley moves, one castor may float and not be supporting any load. An allowance must be made for this and below are the castor load calculations for each configuration.
WheelsCastor wheels are designed to be supported at both ends. They are intended for use in units with manual propulsion with speeds up to four miles per hour. Do not use on power towing without specialist advice as this application introduces many extra stresses and strains. Wheels can be categorised into two groups, hard treads and soft treads. Hard Tread WheelsAre the easiest to push because they have the least tractive resistance. The disadvantage of them is that they are noisy and are liable to cause excessive floor wear. The main types of hard tread wheels are as follows:
Soft Tread WheelsAre resilient, making the quieter with generally less marking and floor wear. Tractive resistance however is much higher. Recent developments in new grades of polyurethane and rubber have now increased load capacities and reduced tractive resistance. There are many types of soft tread wheels, which is increasing all the time the advance in rubber and elastomer technologies.
Wheel BearingsThe choice of bearings is determined by the application, working environment and load.
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0 comments Thursday 03 Jul 2008 | Bob | Storage & Handling
























If you’ve ever felt an electric jolt when getting out of your car or taking clothes out of the tumble dryer then you’ve felt ESD. Charges of static electricity build up from all the materials rubbing together and then pass through your body when they’re able to escape. Large jolts of ESD can create a visible spark, with the most impressive being that of lightning.2
In order to protect your manufacturing area against ESD you need to turn it into an anti static EPA (ESD Protected Area).4 The principle of an EPA is that all your workbenches, trolleys, storage bins and other industrial furniture is connected to the ground so that static electricity can be dissipated (dispersed) safely. Your personnel can also be equipped with conductive shoes and wrist straps to dissipate built up static electricity safely.