Screw End Conditions

Joyce supplies Ball screws, Acme and Stub Acme machine screws, and Metric (trapezoidal) screws with standard end configurations. Joyce also provides precision end machining to meet customer specifications. Select the end fixity that is needed for the application then view the specific machining details below or use the Screw & Nut Selection Guide to communicate your requirements.

Select the type of screw used in the assembly to view machining details:
Machine Screw End Conditions
Ball Screw End Conditions
Metric Screw End Conditions 

End Fixity

Machining for Simple Single Bearing Supports (SB)

  • Simple radial supports
  • Designed for radial loads only
  • Float of bearing in the housing allows for thermal shaft expansion
  • Predrilled for face or foot mounting

Machining for Simple Double Bearing Supports (DB)  

  • Simple support
  • Designed to support a combination of radial and axial loads
  • Predrilled for face or foot mounting
  • Industry standard for interchangeability

Machining for Fixed Double Bearing Supports (FB)  

  • Fixed bearing supports increase angular dynamic system stiffness
  • Allow greater compressive column strength
  • Increase effective length of column and critical speed capability of system
  • Designed to support a combination of radial and axial loads
  • Predrilled for foot mounting
  • Predrilled taper pin reaming to suit final assembly