Starrett 52880 Feeler Gage Parallel Tempered Steel

Product Description

The STARRETT 52880 is a parallel-leaf feeler gage used to measure precise gaps, clearances, and tolerances in mechanical assemblies. The single leaf measures 0.4 mm thick, 12.7 mm wide, and 300 mm long, providing a consistent cross-section across the full length of the blade. Constructed from tempered steel, the leaf resists wear and maintains dimensional accuracy under repeated use. Machinists, HVAC technicians, engine builders, and millwrights use feeler gages like this to set valve clearances, bearing endplay, air gaps, and contact-point tolerances where precise measurement is critical.

This feeler gage is suited for both shop and field applications where a single-thickness blade is preferred over a folding set. The 300 mm length allows reach into deep assemblies or extended measurement runs. The 12.7 mm blade width provides a stable seating surface in slots and between mating components. It is commonly used in residential and commercial HVAC servicing, diesel and gas engine maintenance, industrial machinery alignment, and precision fabrication work.

Key Features

• Parallel leaf profile maintains uniform 0.4 mm thickness from end to end
• Tempered steel construction for durability and resistance to deformation
• 300 mm blade length for reaching deep or extended clearance points
• 12.7 mm blade width provides stable contact surface during measurement
• Single-leaf format for targeted use where a specific thickness is required

Compatibility

Designed as an OEM-style precision measuring blade for use in any application requiring a 0.4 mm feeler gage leaf, including engine valve adjustment, HVAC component gap setting, and general mechanical assembly inspection.

Installation Notes

Power down or de-energize any equipment before inserting the feeler gage into live assemblies. Insert the blade with light, consistent pressure — forcing the blade can introduce measurement error or damage the leaf. Clean mating surfaces of debris or oil film before measuring to ensure accurate contact. This tool requires no installation but should be stored flat and protected from corrosive environments to maintain calibration accuracy.