Starrett 211XP Outside Micrometer with Rounded Anvil 0-1" Range

The Starrett 211XP is a precision outside micrometer featuring a rounded anvil design, purpose-built for measuring curved, convex, or irregular surfaces where a standard flat anvil cannot achieve accurate contact. Manufactured by L.S. Starrett Company — a trusted name in precision metrology for over 140 years — this micrometer delivers the accuracy and reliability expected in professional machining, inspection, and quality control environments.

Key Features:

• Measurement Range: 0–1 inch
• Rounded Anvil: Specially designed for contact on curved or convex workpiece surfaces such as tubing walls, ball bearings, and formed parts
• Graduation: 0.0001" (1/10,000 inch) reading resolution
• Hardened and Ground Measuring Faces: Ensures long-term accuracy and wear resistance
• Solid Steel Frame: Heat-treated for stability and durability under shop conditions
• Lock Nut: Spindle lock for secure readings during recording or transfer
• Thimble: Knurled thimble and sleeve for smooth, controlled adjustment
• Conforms to applicable ANSI/AGD standards for micrometer accuracy

The 211XP is ideal for machinists, toolmakers, and quality inspectors who need to measure wall thickness, convex radii, or other surfaces incompatible with flat-anvil micrometers. The rounded anvil ensures a consistent, single-point contact for repeatable measurements across varying surface geometries.