Custom Shafts and Bearings CNC Machining for Industrial Machinery Industry

For long shafts exceeding 10:1 length-to-diameter ratios, we utilize steady rests and tailstock support systems during turning operations to prevent deflection and chatter. Our precision turning centers feature programmable steady rest positioning that automatically adjusts during machining. For extremely long shafts, we employ between-centers grinding techniques. All long shafts undergo straightness verification using precision dial indicators with measurements taken at multiple points along the length.
 

For bearing journals and press-fit seats, we routinely achieve 8-16 Ra surface finishes through precision grinding operations. For applications requiring superior bearing life and reduced friction, we can deliver 4-8 Ra finishes with superfinishing processes. External shaft surfaces typically range from 32-63 Ra depending on application requirements. All critical surfaces are verified using surface profilometry to ensure specification compliance.
 

Yes, we offer comprehensive heat treatment services including through-hardening, case hardening (carburizing), induction hardening for selective areas, and stress relieving. We work with certified heat treatment partners and can achieve hardness ranges from HRC 28-32 for general shafts to HRC 58-62 for bearing races. All heat-treated components undergo hardness testing verification and post-heat treatment grinding to restore precision dimensions.
 

Yicen Precision routinely achieves concentricity of 0.0003″ to 0.0005″ TIR on multi-diameter shafts through single-setup machining in our turning centers. For critical spindle applications, we can deliver 0.0001″ to 0.0002″ TIR using precision grinding with in-process gauging. All shafts are verified using CMM inspection or precision dial indicator measurements with full documentation provided.