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Starrett 124A Solid-Rod Vernier Inside Micrometers Set, 2-8" Range, 0.001" Graduation, +/-0.0001" Accuracy, Without Case

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Specifications for this item
0.5  inches
Part Number
Brand Name
Measurement Accuracy
Maximum Measurement
Style Name
Special Features
Without Case
Number of Items
Manufacturer Series Number
Solid-Rod Inside Micrometers Set
Gradient Spacing
0.001  inches
System of Measurement

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Key Features

  • Rods marked with length, are adjustable from 2" to 8", and have a shoulder to set in the micrometer head that locks in position to ensure accuracy
  • Hardened and ground anvils on 1/4" diameter¬† solid rods, for accuracy
  • Numbered every thousandth of an inch for quick readings
  • Lightweight for ease of use
  • Includes one 1/2" spacing collar

Package Details

Shipping Weight: 0.05 pounds
Package Size: 7.3 x 1.7 x 1.4 inches

Product Description

The Starrett 124A solid-rod inside micrometer set offers a range from 2” to 8” and has figures numbered every 0.001”. The hardened, radius-ground anvils on rods are accurate. Solid-rod inside micrometers are often used for measuring the inside diameter of a cylinder or ring and when measuring parallel surfaces. The micrometer head, rods, and spacing collars are assembled to the desired range and then adjusted to obtain the measurement.

Micrometers are precision measuring instruments that use a calibrated screw to measure small distances. These measurements are translated into large rotations of the screw that are then able to be read from a scale or a dial. Micrometers are typically used in manufacturing, machining, and mechanical engineering. There are three types of micrometer: outside, inside, and depth. Outside micrometers may also be called micrometer calipers, and are used to measure the length, width, or outside diameter of an object. Inside micrometers are typically used to measure interior diameter, as in a hole. Depth micrometers measure the height, or depth, of any shape that has a step, groove, or slot.

The L. S. Starrett Company was founded in 1880, originally manufacturing bench vises, squares, and other tools. They acquired other companies throughout the years, expanding their services into making precision measurement instruments and tools, such as calipers, micrometers, saw blades, and gauges. Starrett is headquartered in Athol, Massachusetts and has manufacturing facilities in Brazil, the United Kingdom, China, and other locations.

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