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Electronic Bore Gage # 770BXTZ-4

Range: 3.25-4.00"/80-100mm

Resolution: .00005"/.001mm

Price: $1717 $1699.83
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Product Description

770BXTZ-4 Starrett 770BXT Electronic Bore Gage: 3.25-4.00″/80-100mm

The Starrett 770BXTZ-4 Electronic Bore Gage has the following specifications:

  • Range: 3.25-4.00″/80-100mm
  • Resolution: .00005″/.001mm
  • Accuracy: .0002″/.005mm
  • Measuring Depth: 4″/100mm

770BXT Electronic Internal Micrometers provide IP67 level of protection against coolant, water, dirt and dust in hostile shop environments. In addition, they offer extended travel, reducing the need to exchange anvils.

The Starrett 770BXTZ-4 Electronic Bore Gage is made up of the following:

  • Electronic Readout
  • Measuring Head: 3.25-4.00″/80-100mm
  • Setting Ring: 3.250″/82.55mm


  • Wide measurement range without changing anvils
  • IP67 Protected
  • Large high-contrast LCD digital readout is easy to read and reduces error
  • Carbide measuring faces on sizes above 1/2″ (12.5mm) diameter
  • Extensions available for deep holes
  • Includes instant inch/millimeter conversion and preset + and – functions
  • Precision ratchet stop provides correct contact pressure for accurate readings
  • Each micrometer bore gage with head comes with a wooden case, complete with setting ring, contacts, adjusting wrench, spare battery, and instructions

Starrett 770BXT Electronic Bore Gages:

Individual Ranges:

  • 770BXTZ-100 2-Pt Electronic Bore Gage: .080-.100″/2.0-2.5mm
  • 770BXTZ-120 2-Pt Electronic Bore Gage: .100-.120″/2.5-3.0mm
  • 770BXTZ-160 2-Pt Electronic Bore Gage: .120-.160″/3-4mm
  • 770BXTZ-200 2-Pt Electronic Bore Gage: .160-.200″/4-5mm
  • 770BXTZ-250 2-Pt Electronic Bore Gage: .200-.250″/5-6mm
  • 770BXTZ-312 3-Pt Electronic Bore Gage: .250-.312″/6-8mm
  • 770BXTZ-375 3-Pt Electronic Bore Gage: .312-.375″/8-10mm
  • 770BXTZ-500 3-Pt Electronic Bore Gage: .375-.500″/10-12.5mm
  • 770BXTZ-625 3-Pt Electronic Bore Gage: .500-.625″/12.5-16mm
  • 770BXTZ-750 3-Pt Electronic Bore Gage: .625-.750″/16-20mm
  • 770BXTZ-1    3-Pt Electronic Bore Gage: .750-1.00″/20-25mm
  • 770BXTZ-138 3-Pt Electronic Bore Gage: 1.00-1.375″/25-35mm
  • 770BXTZ-2    3-Pt Electronic Bore Gage: 1.375-2.00″/35-50mm
  • 770BXTZ-258 3-Pt Electronic Bore Gage: 2.00-2.625″/50-65mm
  • 770BXTZ-314 3-Pt Electronic Bore Gage: 2.625-3.25″/65-80mm
  • 770BXTZ-4    3-Pt Electronic Bore Gage: 3.25-4.00″/80-100mm
  • 770BXTZ-5    3-Pt Electronic Bore Gage: 4.00-5.00″/100-125mm
  • 770BXTZ-6    3-Pt Electronic Bore Gage: 5.00-6.00″/125-150mm
  • 770BXTZ-7    3-Pt Electronic Bore Gage: 6.00-7.00″/150-175mm
  • 770BXTZ-8    3-Pt Electronic Bore Gage: 7.00-8.00″/175-200mm
  • 770BXTZ-9    3-Pt Electronic Bore Gage: 8.00-9.00″/200-225mm
  • 770BXTZ-10  3-Pt Electronic Bore Gage: 9.00-10.0″/225-250mm
  • 770BXTZ-11  3-Pt Electronic Bore Gage: 10.0-11.0″/250-275mm
  • 770BXTZ-12  3-Pt Electronic Bore Gage: 11.0-12.0″/275-300mm


  • S770BXTBZ 2-Pt Electronic Bore Gage Set: .080-.250″/2-6mm
  • S770BXTCZ 3-Pt Electronic Bore Gage Set: .250-.375″/6-10mm
  • S770BXTDZ 3-Pt Electronic Bore Gage Set: .375-.750″/10-20mm
  • S770BXTEZ 3-Pt Electronic Bore Gage Set: .750-2.00″/20-50mm
  • S770BXTFZ 3-Pt Electronic Bore Gage Set: 2.00-4.00″/50-100mm
  • S770BXTKZ 3-Pt Electronic Bore Gage Set: 4.00-6.00″/100-150mm
  • S770BXTGZ 3-Pt Electronic Bore Gage Set: 4.00-8.00″/100-200mm
  • S770BXTLZ 3-Pt Electronic Bore Gage Set: 6.00-8.00″/150-200mm

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