Starrett 51290 Taper Gage 0.1 to 0.5 Inch 8 Leaf

Product Description

The STARRETT 51290 is an 8-leaf taper gage used to measure hole sizes, slot widths, and gap dimensions in dies and machined workpieces. It covers a measurement range of 0.1 to 0.5 inches with 0.001-inch graduation, giving the user precise readings in tight spaces. Each leaf is constructed from tempered steel for durability and resistance to wear. At 2.5 inches in length, the gage is compact enough for bench work and in-line die inspection. A locking device holds the leaf position once the correct fit is found, allowing the reading to be transferred without slip. Weighing 0.125 pounds, it is a lightweight addition to any machinist or toolmaker kit.

The STARRETT 51290 is suited for machine shops, tool and die operations, and general metalworking environments where accurate inside measurement of holes and gaps is required. It is commonly used during die setup, quality inspection, and part fitting tasks. The 8-leaf configuration provides multiple thickness steps across the 0.1 to 0.5 inch range, making it practical for a variety of workpiece geometries encountered in production and maintenance settings.

Key Features

• Measurement range of 0.1 to 0.5 inches with 0.001-inch graduation for precise readings
• 8 tempered steel leaves for durability and consistent feel across repeated use
• Locking device secures leaf position for accurate measurement transfer
• Compact 2.5-inch length suitable for die work and confined workpiece access
• Lightweight at 0.125 pounds for easy single-hand operation

Compatibility

Designed as a standard taper gage for determining hole sizes in dies and other machined workpieces where inside measurement across the 0.1 to 0.5 inch range is required.

Installation Notes

Taper gages are hand tools and require no installation. Ensure the workpiece is secure and free of debris before inserting the leaf to obtain an accurate measurement. Do not force the leaf beyond its rated range, as this may damage the tempered steel leaves or distort the graduation markings. Store the gage in a dry location to prevent corrosion and maintain calibration integrity.