This castor with polyurethane coating and cast iron rim will help compensate for the heavy weight of a swing gate. The vertical travel is minimal (20 mm maximum) at the spring, but it will absorb a gravel or a floor bump. To compress the spring to 50% of its stroke (i.e., 10 mm), a force of 85 kilos must be applied, and to compress it to 100%, a force of 245 kilos (20 mm of travel) must be applied.
The plate to be screwed or welded onto your gate is offset from the wheel. This means that the castor can rotate 360 degrees completely without touching the gate. We have compensated for this significant overhang with reinforced welds and steel thicknesses of 6 mm. This plate has 6 fixing holes. For fixing, we recommend passing through with a bolt and securing it with a nut on the other side. However, simple self-drilling screws may suffice if the total load is not too high. The assembly has a greaser, which will help protect the ball crown of the castor.
The maximum footprint once fixed and the castor rotated to its maximum is 275 mm.
We can, of course, manufacture this model to any dimension.
The compression spring has spaces between the coils when it is not loaded. The distance between the coils decreases when the spring is loaded and compressed. In principle, a compression spring should never be compressed to the point where the coils touch. Its lifespan would be significantly shortened. The ideal solution is to use 60% of the maximum force and maximum stroke. A compression spring should never serve as a physical stop.
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