Micrometer INSIZE 0–25 mm, point/anvil tip (model 3230-25A)

INSIZE micrometer 0–25 mm, point/anvil tip (model 3230-25A) is a precision external measuring tool designed to measure small diameters, stepped surfaces and recessed features with high repeatability. The instrument combines a pointed contact on one side and a flat anvil on the other, allowing accurate measurement of external diameters, thicknesses and projections in tight spaces. A calibrated spindle and a stable frame deliver fine adjustment and consistent contact pressure for workshop, machining and inspection tasks that require reliable dimensional control.

Advantages

The point/anvil configuration enables measurement of small grooves, ridges and features inaccessible with standard flat-faced micrometers. A finely threaded, calibrated spindle provides smooth travel and precise reading, reducing measurement error. The robust frame maintains alignment and minimizes deformation under normal use, while the compact 0–25 mm range offers convenience for frequent small-scale checks. Materials and build quality are suitable for regular workshop conditions and metrology benchtops.

Suitable for

• Measuring external diameters of small shafts and pins
• Checking thickness or step heights in machined parts
• Inspecting grooves, recesses and protrusions where flat anvils cannot reach
• Quality control and inspection tasks in workshops and small production runs
• Precision carpentry or model making where fine external dimensions are required

Key specifications

• Measuring range: 0–25 mm
• Contact type: pointed contact on one side, flat anvil on the other
• Spindle: calibrated, finely threaded for precise adjustment
• Frame: rigid design for stable holding and minimal distortion
• Scale/readout: graduated spindle for direct reading (mechanical)
• Typical accuracy class: precision instrument suitable for workshop metrology

How to use

Clean the anvil and pointed contact before measurement and ensure the workpiece surface is free of debris. Rotate the thimble to bring the pointed contact and anvil into light contact with the feature to be measured; use the spindle to make fine adjustments until a firm but not excessive contact is achieved. Read the measurement from the graduated spindle according to standard micrometer reading procedures. For repetitive checks, close the micrometer on a reference gauge to verify zero and adjust as needed.

Usage recommendations

Store the micrometer in a protective case when not in use, avoid exposing it to heavy shocks or corrosive environments, and periodically check calibration against standards. Use gentle and consistent finger pressure on the ratchet or friction thimble (if fitted) to ensure repeatable contact force and reduce measurement variation.