1. Linear optical axis material: No. 45 steel is better, low carbon steel is second, and high carbon steel is slightly weaker. Naturally, prices will also vary.
2. Linear optical axis surface hardness: Generally, the surface hardness is above HRC58 (most manufacturers’ sample parameters will be marked as HRC62 positive and negative 2. The specific details still need to be certified, but if it exceeds 58, it is considered extremely Most of them are used). What is more important is the uniformity of the full surface hardening depth and hardness. If the hardness test reaches 2 degrees of Rockwell positive and negative poles, it will meet the standard. The quenching depth is between 1.5 and 5 mm (depending on the diameter). Medium and low-frequency heat treatment is likely to cause too deep quenching, which will have a negative impact on the compressive strength. High-frequency quenching depth is generally shallower and can achieve both. Balanced hardness and compressive strength.
3. Straight line optical axis parallelism: It is related to the accuracy of guidance. Generally, manufacturers will straighten it when entering and exiting the warehouse. However, products with large height and diameter may bend during transportation or due to the impact of their own weight.
4. Linear optical axis plating: A good plating layer thickness should be above 0.02mm. Cheap products may reduce the plating layer thickness and cause spot rust during long-term use.
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