Mechanical Holtest (Type II) Three-Point Internal Micrometer Complete Set

The Mitutoyo mechanical Holtest internal micrometer set includes complete gages (micrometer head units and measuring heads) for each size. Three alloy steel anvils evenly spaced at 120° for true alignment of the axis bore for accurate, easily repeatable measurements. Hardened steel spindles with a carbide ball and cones with a carbide pin ensure accuracy and durability when extending and retracting the anvils. The holtests ratchet stop mechanism provides a constant measuring force on the hardened steel spindle to ensure accurate, even measurements.

• Available in Metric and Inch models
• Contact points are constructed of hardened steel
• Optional extension rod allows for measuring deep holes
• Optional setting rings for zero point adjustment are available
• Design allows for measurements closer to the bottom of blind bore holes
• Scale on thimble and sleeve is laser etched for easier reading in all conditions
• Holtests up to 100mm/4” diameter measurements supplied in a fitted plastic case
• Holtests over 100mm/4” diameter measurements supplied in a wooden case