PMS-LB Model Swivel Wheel Lever Type (With Double Stopper)

The PM series are high performance industrial use casters that are strong, turn easily, have light deadweight, and have reduced noise. This was developed with the concept of targeting a higher end compatible product with the conventionally sold J series, which are general industrial use casters. This also suppresses increases in costs.
Firstly, the reasons leading to development of a higher-end compatible product for industrial use casters are as follows. Industrial use casters used for factory carts, etc., are consumable goods. There is an aspect of emphasizing cost over performance, and the J series sufficiently met a specific performance standard.
But this series only met that specific standard, and had much room for improvement when considering the needs of the customers using the product with regards to durability, operability, noise, etc. Conventional products on the market include many casters with the described performance level, but these were not very cost-efficient. Then we wondered whether we could make industrial use casters that maintain the same cost and provide the kind of performance that will satisfy customers, and set out to develop the PM series.

We started PM series development with solid goals, but development was hardly smooth, and we did encounter problems. As you would expect from what you have read above, the performance and costs were difficult to balance. We went through many shape concepts and recalculations.
We arrived at using high-strength material, like an automobile body that uses high tensile steel. Using this material enables attaining higher strength than the conventional product, even though the plate thickness is thinner than the conventional product. This allowed us to balance the cost and lighten the dead weight. We are very satisfied with finding an ideal material. But the press processing method differed from the conventional product when the new material was adopted, and we had some difficulty with processing it to the dimensional accuracy required for functioning as a caster. We thoroughly evaluated every possible factor and went through a trial-and-error process.