... materials 2.Hardened ball guide bushes 3.Custom ball bearing bushes 4.Factory price 5.Fast delivery Item No.: ... accurate grinding)- Grinding (Precision Centerless Grinding)Process (Brass Ball Bearing): Sawing material- Lathing (CNC Lathe or Common Lathe)- Drilling ... Guide bushing, Guide Pillar, Leader Pin, Guide post sets, Ball retainer, Punch, Button dies, Non-standard mould inserts, Springs, Mould ...