Starrett 51170 Tapered Feeler Gage Set 9 Piece

Product Description

The STARRETT 51170 is a 9-piece tapered feeler gage set designed for precise gap measurement in mechanical assembly, engine work, and equipment maintenance. Each leaf is manufactured from tempered steel and tapers from 0.25 inches to 0.50 inches in width across a 4.75-inch working length, allowing the technician to find the exact contact point within a gap rather than just checking a single thickness. The set spans a measurement range of 0.1065 inches to 0.1660 inches, making it well-suited for tighter tolerance checks on valve clearances, spark plug gaps, bearing fits, and similar applications. The entire set weighs 0.5 pounds, keeping it light and portable for field use.

This feeler gage set is used by HVAC technicians, machinists, millwrights, diesel mechanics, and general maintenance professionals wherever precise gap or clearance measurement is required. The tapered leaf design is particularly useful in confined spaces where a parallel blade would be difficult to read accurately. It is equally at home in a shop environment and on a service call, and is a standard addition to any precision measurement kit.

Key Features

• 9 tempered steel leaves for durable, repeatable measurements
• Tapered leaf profile allows precise gap location, not just go/no-go checking
• Measurement range: 0.1065 inches to 0.1660 inches
• Leaf length of 4.75 inches provides reach into tight clearances
• Tapered width from 0.25 inches to 0.50 inches across the leaf
• Lightweight at 0.5 pounds for easy portability on the job

Compatibility

Designed as a general-purpose replacement or supplemental feeler gage set for trade professionals requiring tapered-style leaves in the 0.1065 to 0.1660 inch thickness range.

Installation Notes

Feeler gages require no installation tools, but the measuring surfaces and the component gap should be clean and free of debris before use to ensure accurate readings. Do not force a leaf into a gap; select the appropriate thickness by feel with light drag resistance as the standard indicator of correct fit. Store leaves clean and lightly oiled to prevent corrosion and maintain calibration integrity.