toolrest

Toolrest is a component used on lathes to support the cutting tool during turning operations. It typically comprises a horizontal tool rest bar, a post or banjo, and a locking mechanism that attaches to the lathe bed or banjo. The bar can be rotated and moved along the post to position the tool at the desired height and distance from the workpiece. In most lathes, the rest is mounted on the banjo above the bed and can be raised, lowered, or angled to place the tool edge near the centerline of the work.

Function and use: The tool rests the cutting tool and guides its motion, helping maintain a consistent edge and control. Proper alignment and proximity to the workpiece influence cut quality and surface finish. A shorter, lower, and closer rest generally offers better control, while excessive height or distance can increase chatter.

Types and materials: Toolrests are commonly made of hardened steel or alloy, with some models using aluminum for lighter duty. They may be curved (for bowls and hollow forms) or straight, and often employ a replaceable surface or insert. Hobby and small-shop rests tend to be simpler and lighter, with straightforward locking screws.

Maintenance and safety: Regular inspection for burrs, wear, or deformation is advised, and all fasteners should be securely tightened before use. Keep the rest clean and free of obstructions. Correct height and alignment reduce tool chatter and the risk of tool slippage or kickback. Always ensure the toolrest is securely locked before starting the machine.

Other uses: In pottery, a tool rest is a small horizontal support attached to a potter’s wheel to hold shaping tools within reach while working with clay.