NSK Bearings for Machine Tools & Spindle Rebuilds

Machine tool spindles typically use angular contact ball bearings in matched sets, often with cylindrical roller bearings at specified shaft positions. High speed, heat, and cutting loads make arrangement, preload, and precision class critical, whether building a new spindle or rebuilding an existing one. Spindle builders and service teams need bearings that match the original or approved specification exactly.

• Confirm the set arrangement, such as back-to-back or face-to-face, because it determines the spindle's moment stiffness and how it handles thermal growth.
• Quote preload and precision class on every line of a rebuild enquiry so the offered bearings can be checked against the spindle specification.
• Check the internal clearance of cylindrical roller bearings for high-speed positions, as it changes with fit and operating temperature.
• Treat any change of contact angle, cage, or execution as an engineering change that needs separate review rather than a routine substitute.