Ejecting the core problem for hole saw operators

Hole saw operators will be familiar with the problem of extracting the material that often becomes jammed inside the hole saw after cutting. The classic, method of removing the trapped material with a drift or screwdriver may be effective, but there is an obvious health and safety risk to the operator.

One slip can spell disaster as the teeth of the hole saw are extremely sharp, and the elevated temperature of the saw if it has been recently used poses another threat of injury. Starrett’s Core Ejector is designed to elevate this risk and improve health and safety for the operator.

The spring-based Core Ejector, which can easily be installed onto a hole saw by twisting the spring over the pilot drill, comprises a precision tapered spring and an aluminium pressure plate. As the saw cuts into the material, the pressure plate compresses the spring and when the saw breaks through to complete a cut, the spring will act on the pressure and push the core out of the saw before it becomes trapped.

Marketing Manager at Starrett, John Cove explained: “The Core Ejector tool has been designed with ease of use in mind. The low cost tool is available in a range of sizes for flexibility and it functions effectively on ferrous and non-ferrous sheet metal, sheet Glass Reinforced Plastic (GRP) and composite materials, as well as ceramics and tiles when fitted to diamond hole saws.

Cove added: “It is currently available in six sizes and covers a range of hole saw diameters. The range begins with the small KA8-1 core ejector for saws between 20-24mm in diameter and increases to the largest KA8-6 saws, which reach between 133-210mm in diameter.”