Stainless Steel Ball Spline for Cleanroom Use: No Rust Oil, Low Particles

Answer: Yes - for cleanroom applications (semiconductor packaging, IC test, medical devices), UVT supplies stainless steel spline shafts with a no-rust-oil option: corrosion resistance without oil vapor, minimizing particle generation compared with standard steel shafts shipped with rust-prevention oil. Stainless shafts are also compatible with low-outgassing grease selection for vacuum and cleanroom processes.

Why standard steel is a problem in cleanrooms

Standard ball splines are protected by rust-prevention oil, which can migrate, vaporize and attract particles in cleanroom environments. A stainless steel shaft eliminates the need for that oil layer while keeping the precision-ground spline grooves that the balls run in.

Material comparison

What stays identical

• Same precision-ground spline grooves and 4-point contact ball design
• Same preload classes (T0 / standard / T1) and precision grades (H / P)
• Same torque and linear motion capability, including rotary ball splines

Typical cleanroom applications

• Semiconductor packaging and IC test handlers - vertical shafts with high reciprocation
• SMT mounters in electronics assembly - nozzle Z-axis, limited stroke type
• Medical device assembly lines - washable / sterile environments
• Precision inspection and metrology stages

For cleanroom motion, specify stainless shaft + no rust oil + low-outgassing grease on your inquiry, and confirm load and duty cycle for life calculation. See our ball spline range including the THK BNS-V alternative series on the product page, and certification evidence on our honor page. UVT Transmission - precision motion components that do not compromise your cleanroom.