Mitutoyo Holtest Bore Gages now Titanium Nitride Coated

Holtest Bore Gages provide durability and abrasion resistance while making 3-point bore diameter measurements in range above 8 mm bore diameter. Pins made of hardened steel exhibit 1,700-2,000 Hv hardness and shear strength of 4,000 N/mm². Equipped with digital display and ABS scale with absolute origin, gauge also features constant-force ratchet that minimizes measurement variations between different operators.

The new line of Holtest bore gages from Mitutoyo America Corporation employ a titanium nitride coating to offer increased durability and abrasion resistance while making high accuracy, three-point bore diameter measurements.

The measuring pin contact faces of the new Mitutoyo Holtest bore gages are coated with titanium nitride (Holtest and Digimatic Holtest models). As a result, the pins can be made of hardened steel instead of more brittle carbide, providing extra toughness to reduce the likelihood of contact faces being chipped during measurement.

The three-point design of the Holtest bore gages assures smooth, highly stable measurement in the ranges above 8mm bore diameter while a constant-force ratchet minimizes measurement variations between different operators. Optional extension rods can be fitted to enable measurement of deeper holes.

Digimatic Holtest bore gages are also equipped with an easy to read digital display and the ABS (Absolute) scale with absolute origin, which eliminates the necessity to set the origin at every power-on. The system also eliminates over-speed errors for increased reliability.