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Starrett 78MXTZ-300 Inside Bore Gage Micrometer, 275-300mm, 0.005mm, 0.009mm

$5,599.00

The Starrett 78MXTZ-300 3-point contact gage has a measurement range of 275mm to 300mm with a measuring depth of 118mm. It can measure the inside diameter of cylindrical holes in steel and other materials.

Add 5-7 days for calibration

Product Description

The 78MXTZ-300 Bore Gage features extended travel, reducing the need to exchange anvils. The ground contact points seat the internal micrometer faster and more accurately than the spherical contacts found in other gages. The rugged and accurate 78MXTZ series internal micrometers are available individually or in economical sets from .080-12″ (2-300mm).

Designed to measure internal cylindrical holes and grooves, this gage can measure in metal, plastics, and other materials. The 78MXTZ-300 features a 3-point contact with a hardened point to ensure accurate measurements. The 275-300mm range allows for the measurement of holes between 275 and 300 millimeters in diameter. The 118mm measuring depth allows this model to measure holes up to 4.6 inches deep.

Features

  • Wide measurement range without changing anvils
  • Resolution from .0001″ (0.0025mm) on the 2-point contact tools up to 3/4″ (20mm) and .00025″ (0.005mm) on the 3-point contact tools ranging from 3/4″-12″ (20mm – 300mm) 
  • Tungsten carbide measuring faces on all 3-point heads above 1/2″ (12.5mm)
  • Ratchet stop ensures consistent measurements
  • Self-centering contacts for true readings
  • Blind bore measuring capability above 1/2″ (12.5mm) diameter
  • Extensions available up to 6″ (150mm) for deep hole measuring
  • Setting rings included
  • Depth stop/collar also available for .080″-.250″ (1-6mm) range
  • Each micrometer bore gage comes in a case, complete with a setting ring, contacts, wrenches, and instructions

Applications

  • Manufacturing
  • Machining
  • Automotive
  • Aerospace
  • Energy
  • Defense

Uses

  • Check bore holes prior to assembly or maintenance
  • Check the accuracy of machining operations after completion
  • Measure the inside diameter of a hole
  • Test the quality of pistons, rods, and sleeves
  • Ensure products meet certain size requirements

About Starrett

The L.S. Starrett Company is a world leader in precision measuring tools and instruments. Since 1880, they have been an industry standard. Starrett’s high quality and durability have made the brand an industry standard for decades. They produce products for various industries, including aerospace, automotive, manufacturing, and commercial construction. Today, they’ve expanded into metalworking, making saw blade products for manufacturing operations worldwide.

Additional Information

Weight 48 lbs
Dimensions 23 × 16 × 9 in
Range

275-300mm

Resolution

0.005mm

Movement of Screw

1"

Operation Type

Mechanical

Thimble Type

Friction

Reading

Metric

Includes

Contacts; Setting Ring; Wrenches

Lock Nut Type

Screw

Accuracy

±0.009 mm

Max. Measuring Depth

118mm

Contact Point Material

Carbide

Inside Micrometer Type

3-Point Inside Micrometer

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