Starrett 50154 Drop Indicator Split Bushing 80 Dial Indicators

Product Description

The STARRETT 50154 is a drop indicator split bushing designed to mount and secure dial indicators in precision measurement applications. The split bushing configuration allows technicians to clamp the indicator firmly in place without marring the instrument housing. With an inside diameter of 0.375 inches and an outside diameter of 0.5 inches, this bushing provides a snug, repeatable fit that maintains indicator alignment during measurement tasks. It is a small but critical accessory used in machine shops, production environments, and field service settings where accurate runout, deflection, or surface variation readings are required.

This split bushing is intended for use with 80 series dial indicators. It fits standard indicator holding fixtures, magnetic bases, and surface gauge arms that accept a 0.5-inch OD bushing. Machinists, quality control technicians, and precision measurement professionals will find it suited for both bench and in-machine applications where a secure indicator mount is essential for repeatable readings.

Key Features

• Split design allows tool-free or minimal-hardware clamping of the dial indicator stem
• Inside diameter of 0.375 inches fits 80 series STARRETT dial indicator stems
• Outside diameter of 0.5 inches compatible with standard indicator holders and fixtures
• Compact and lightweight at 0.5 pounds, adding negligible mass to the measurement setup
• Sold as a single unit for targeted replacement or addition to existing setups

Compatibility

Designed for use with STARRETT 80 series dial indicators as stated by the manufacturer. Fits indicator holders, magnetic bases, and gauge arms that accept a 0.5-inch OD bushing bore.

Installation Notes

Installation is performed by machinists or metrology technicians as part of setting up a dial indicator assembly. Ensure the indicator stem seats fully within the bushing bore before tightening the clamping mechanism on the holder. Do not overtighten the split clamp, as excessive force can distort the bushing bore and affect indicator alignment. Verify indicator freedom of movement along the spindle axis after mounting.