Precision dial bore gages for internal diameter inspection

Bore Gages · Fowler · Mitutoyo · Starrett · Mahr · INSIZE

Bore Gages

Bore Gages for Internal Diameter Inspection

Precision dial and electronic bore gages for comparative measurement of internal diameters — from small-bore .7" instruments through 4"–12" large-range models, complete .7"–6" sets and the setting masters that keep them accurate.

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ISO/IEC 17025Accredited
ISO 9001Certified Quality Management
ANSI/NCSL Z540-1Accredited Calibration Lab
Made in USASince 1989

WESTport offers precision bore gages for comparative measurement of internal diameters from leading metrology manufacturers including Mitutoyo, Fowler, Starrett, Mahr and INSIZE. Bore gages measure not only diameter but bore conditions such as ovality and taper, making them essential instruments for machine shops, manufacturing facilities, quality-control departments and calibration laboratories.

Choose from economical dial bore gages for everyday shop inspection through electronic models with preset and minimum-hold functions, complete multi-range sets, and premium self-centering systems for micron-level precision work.

Why Buy Bore Gages from WESTport?

  • Mitutoyo, Fowler, Starrett, Mahr and INSIZE models
  • Measuring ranges from .7" through 12" and 18–160 mm
  • Dial and electronic/digital measurement
  • Individual gages and complete multi-range sets
  • Carbide and tungsten-carbide contacts throughout
  • Bore gage setting masters available for accurate, repeatable zeroing
  • ISO/IEC 17025 accredited calibration services available
  • Technical product assistance from our metrology team

Contact WESTport for pricing and current availability.