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Straight DIN 9
- Tooth grinding accuracy: DIN 9 (German standard)
- Material: C45
- Hardness: HRC 50–55
- Heat treatment: High-frequency tooth quenching
After high-frequency quenching, the rack surface is blackened, providing high rust resistance and making it less prone to corrosion. The tooth surface has high hardness and excellent wear resistance, making it suitable for linear motion equipment with frequent reciprocating operation.