Portable Line Boring Machines

SPR’s Portable Line Boring Machines deliver the precise bore your application requires, while the end-mount design makes it easy to set up so you can get your job done fast. These machines accommodate a wide range of bore diameters and are extremely rigid due to their dual guide bar design.  They can be set up both horizontally and vertically and are portable enough to get into challenging locations. Along with variable speed feed and rapid traverse, these machines use our Universal Mounting System providing a single, interchangeable set-up for both line boring and SPR’s Auto Bore Welding Systems.


  • Cover boring diameters from 1.5 in to 120 in (38.1 mm to 3048 mm)
  • Dual Guide Bar for Rigidity
  • Easy-to-Handle Design
  • Effortless Setup Reduces Downtime
  • Setup Horizontally and Vertically
  • Highly Engineered Rotation Drive
  • Optional ID Support Bearings
  • Electric or Hydraulic Options
  • Universal Mounting System
  • Single Setup for Line Boring and Bore Welding