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The materials of gear rack
- Jan 22, 2019 -

Rack material is widely used according to its material selection. In some toys, plastic injection moulding such as PVC and POM can be used. Metal aspect is 45# steel. Now most of the racks are made of S45C medium carbon steel or SCM440 chromium-molybdenum alloy steel. If imported materials are used, the hardness of S45C medium carbon steel can reach about 45 degrees, while SCM440 chromium-molybdenum alloy steel can reach about 60 degrees. The point can reach 65 degrees

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