Why don't your guideposts last long? Dissecting the "four longevity genes" of precision-grade guideposts: The important roles of SUJ2 and sub-zero treatment.
"Four Major Longevity Genes" of Precision Grade Guide Posts
Abnormal noise and cumulative errors are caused by insufficient rigidity of the guide post assembly. Handway extends mold life by 3 to 5 times.
1. SUJ2 Bearing Steel: High fatigue strength that does not bend even after tens of millions of reciprocations.
2. Hardening & Sub-Zero: Hardness HRC 58-62. Residual stress is eliminated, resulting in zero dimensional change.
3. Super Finishing (<Ra 0.1): Minimizes friction heat. The black oxide coating absorbs oil film and prevents wear.
4. 2µm Tolerance & JIS Grade 5 Balls: "Zero Clearance" guidance with aluminum retainers and high sphericity steel balls.
FAQ Highlights
Q1. Reason for Sub-Zero: Prevents aging deformation and maintains 2µm tolerance. Prevents seizure due to thermal expansion.
Q2. Effect of Black Oxide: The fine pores on the surface absorb and retain oil, maintaining the oil film even with high-frequency operation.
Q3. Advantages of Aluminum Retainers: High rigidity without embrittlement from oil. Significantly reduces impact force due to inertia.
Q4. Prevention of Eccentric Breakage: "Chamfer f8" makes centering easy. Confirms coaxiality and avoids excessive pushing.

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