Turn button

Overview

A turn button (also called a turn catch or cabinet turn) is a short bar held by a screw through its middle. It turns on the screw to cover the door or lid edge, and holds it shut by friction against the screw head. It is made in wood or in metal and is common on dust-proof backs, small cabinet doors, display cases, sewing boxes and anywhere a quiet, hand-operated catch is wanted. Wikipedia's latch entry places it in the family of simple latches that join and release surfaces.

Types and sizes

• Wooden buttons, shop-made from the same species as the case, about 40 x 15 mm (1-1/2 x 5/8 in), are the traditional choice.
• Brass and steel buttons come as turn buttons with a washer.
• Cam-style and cabinet turn types have a profiled end.
• The screw sets the hold: fixed with a washer for friction, loose for spin.
• Size is the length of the button; 25 to 50 mm (1 to 2 in) covers most uses.

Where it is used

A common country and workshop catch, still used on case backs, small cupboard doors and boxes. It is easy to make in the shop and can be sized to the work.

Choosing and sizing

Use a button long enough to cover the door edge by about 10 mm (3/8 in) when turned. One at the top and one at the bottom for a tall door. Use a hard wood (Hard maple, White oak) so the button does not break; screws should be in side grain.

Installation

1. Cut and shape the button; drill the centre hole slightly oversize for the screw shank.
2. Fix it to the cabinet frame next to the door edge with a pan or round-head screw and a washer.
3. Adjust the screw until the button turns with firm friction.
4. Check the button covers the door edge by about 10 mm (3/8 in); trim if it does not.

Wood movement and species

The button is small, but the door edge moves with the season: allow a 2 mm (1/16 in) margin so it still covers the door at its narrowest. A wooden button swells slightly in humid weather and can tighten; leave a small tolerance. Do not choose steel buttons near oak, where tannins stain.

Common mistakes

• Button too short to hold the door.
• Screw too tight: the button will not turn.
• Screw too loose: the button swings down and releases the door.

Related

• Magnetic catch and Roller catch: alternatives.
• Wood screw: fixing the button.
• Cabinet and chest lock: when security matters.