Starrett 52901 Crankshaft Distortion Dial Gage Kit 12 Pc

Product Description

The STARRETT 52901 is a 12-piece crankshaft distortion dial gage kit designed for precision measurement of crankshaft bore distortion and alignment in engine reconditioning and machining applications. Built around the Series 696 platform, the kit measures up to 18 inches and delivers readings in 0.001-inch dial graduations on a 0-20-0 bi-directional dial face. The kit includes a balancing attachment that extends coverage from 2-3/8 inches to 18 inches, giving technicians a wide measurement range in a single organized package. Machinists, engine builders, and precision measurement professionals install and use this kit for accurate crankshaft bore inspection.

The 52901 kit is suited for automotive and industrial engine rebuilding shops where crankshaft bore distortion measurement is part of the machining and quality-verification workflow. The 18-inch maximum range and included extension attachment allow measurement across a broad range of engine block bore sizes. The kit is organized as a complete unit, reducing the need to source individual components separately. It is appropriate for use in professional machine shop environments where tight tolerances and repeatable measurements are required.

Key Features

• 0.001-inch dial graduation for high-resolution distortion readings
• 0-20-0 bi-directional dial face for direct plus-or-minus deflection reading
• Balancing attachment covers 2-3/8 inches to 18 inches measuring range
• Movable bezel allows zero-setting at any position on the dial
• Non-breakable crystal protects the dial face during shop use
• 12-piece kit includes one extension for flexible setup configurations

Compatibility

Designed as an OEM-style crankshaft distortion measurement solution compatible with STARRETT Series 696 dial gage components and accessories.

Installation Notes

This kit is installed and operated by machinists and precision measurement technicians in engine rebuilding and machine shop environments. Before use, ensure the engine block is secured and all rotating assemblies are stationary. Follow the setup sequence provided in the STARRETT Series 696 documentation to mount the balancing attachment and zero the dial before taking measurements. Do not exceed the rated 18-inch measuring range, as overextension may affect calibration and dial accuracy.