Value Collection 150-3-100-.2500 Adjustable Stop Countersink

Product Description

The VALUE COLLECTION 150-3-100-.2500 is a 3-flute adjustable-stop countersink designed for precision countersinking operations in metalworking and fabrication applications. Built from high-speed steel (HSS) with a bright, uncoated finish, it features an integral pilot for self-centering accuracy and a 100-degree included angle. The overall length is 2.5 inches, with a 3/8-inch head diameter. The adjustable stop collar allows the operator to set a repeatable countersink depth, reducing the need for constant manual measurement during production runs. This tool is intended for use by machinists, tool and die workers, and maintenance technicians working in shop or field environments.

This countersink is suited for right-hand cutting in ferrous and non-ferrous metals where consistent, controlled countersink depth is required. The 1/4-inch integral pilot diameter guides the tool concentrically into a pre-drilled hole, making it appropriate for aerospace, general machining, and sheet metal assembly work. The 1/4-28 straight threaded shank mounts securely in compatible countersink holders or adjustable-stop assemblies. The 3/16-inch shank diameter and 1.75-inch shank length are sized for standard toolholding systems.

Key Features

• 100-degree included angle for standard countersink geometry in metal applications
• 3-flute high-speed steel construction for durability across ferrous and non-ferrous materials
• Integral pilot (0.25 inches diameter) provides self-centering alignment in pre-drilled holes
• Adjustable stop design enables repeatable, consistent countersink depth without manual gauging
• 1/4-28 straight threaded shank for secure mounting in compatible adjustable-stop holders
• Bright, uncoated finish - suitable for general-purpose dry or lubricated cutting

Compatibility

Designed for use with adjustable-stop countersink holder systems accepting a 1/4-28 straight threaded shank with a 3/16-inch shank diameter. Verify holder thread and shank specifications before installation.

Installation Notes

Installation and use should be performed by qualified machinists or tool operators familiar with rotating cutting tools and applicable shop safety standards. Ensure the spindle is fully stopped and the machine is locked out before mounting or adjusting the tool or stop collar. Pre-drill a pilot hole to the specified pilot diameter before countersinking. Apply appropriate cutting fluid as needed based on the workpiece material.