Yes, installing a cabinet lock on a timber drawer is well within the reach of most DIY-minded homeowners. It requires no licensed trade work, no building consent, and only basic tools. With a bit of care and the right lock for your drawer, you can have it done in under an hour.
Types of Cabinet Locks to Choose From
Before you pick up a drill, it pays to know which lock suits your drawer. The most common options you'll find at Bunnings or Mitre 10 include:
- Cam locks – The most popular choice for timber drawers. A cylindrical barrel fits through a drilled hole in the drawer face, and a rotating cam on the back engages a strike or the cabinet frame. Available in various barrel lengths to suit different timber thicknesses.
- Drawer bolt locks – A sliding bolt mechanism that locks the drawer from the inside. Requires a cut-out rather than just a round hole.
- Hasp and staple with padlock – A surface-mounted option that's very easy to fit but more visible. Good for workshop or garage cabinets.
- Plunger locks – Similar to cam locks but use a spring-loaded plunger instead of a cam. Common on filing cabinets.
For most timber kitchen, office, or bedroom drawers, a cam lock is the simplest and neatest solution.
What You'll Need
| Item | Notes |
|---|---|
| Cam lock (correct barrel length) | Measure your drawer face thickness first |
| Power drill or hand drill | Variable speed is ideal |
| Hole saw or spade bit | Match the diameter specified on the lock packaging — commonly 16 mm, 19 mm, or 22 mm |
| Chisel and mallet | For mortising the cam recess if needed |
| Pencil and tape measure | For marking out accurately |
| Masking tape | Helps prevent timber tear-out when drilling |
| Screwdriver | For tightening the retaining nut |
Step-by-Step Installation
1. Measure and mark your position
Decide where the lock will sit on the drawer face — typically centred horizontally and at a comfortable height. Use a pencil to mark the centre point. Apply a strip of masking tape over the mark; this reduces splintering when you drill through the timber face.
2. Check your drawer face thickness
Measure the thickness of the timber drawer face. Cam locks come in different barrel lengths (often 19 mm, 25 mm, or 32 mm). Choose one where the barrel length is slightly less than your timber thickness so the retaining nut can grip properly without the barrel protruding too far inside the drawer.
3. Drill the hole
Using the correct size hole saw or spade bit (check the lock's instructions — usually 16–22 mm), drill slowly and steadily through the drawer face. Keep the drill perpendicular to the surface. Drilling from the front face through to the inside reduces visible tear-out.
4. Fit the lock barrel
Insert the lock barrel through the hole from the front. On the inside of the drawer, slide on any washers provided, then thread on the retaining nut and tighten firmly with a screwdriver or the appropriate spanner. Don't overtighten on soft timber — you can crush the wood fibres.
5. Position and fit the cam
Insert your key and rotate it to see the arc the cam travels. Hold the cam against the inside rear of the drawer face and mark where it will engage the cabinet frame or a strike plate. You may need to chisel a small recess in the cabinet frame so the cam sits flush when locked.
6. Test before finishing
Test the lock several times with the drawer open and closed before calling the job done. Make sure the cam engages cleanly and the drawer holds firm when locked.
Tips for a Neat, Professional Result
- Pilot holes first – If using a spade bit, drill a small pilot hole at your centre mark to keep the bit from wandering.
- Timber species matters – Hardwoods like rimu or matai (common in older NZ homes) are denser and may need sharper bits and slower drill speeds.
- Avoid splitting thin drawer faces – If your drawer face is very thin (under 12 mm), consider a surface-mounted hasp instead of a through-hole cam lock.
- Keyed-alike locks – If you're fitting locks to multiple drawers or cabinets, look for keyed-alike sets so one key operates them all. Ask at your local hardware store.
Safety Notes
This job involves no electrical, gas, or plumbing work, so there are no restricted-work considerations. However, take care when drilling — secure the drawer firmly so it can't move, and keep fingers clear of the drill bit. If you're working on an antique or high-value piece of furniture, consider practising on scrap timber first.
When to Call a Professional
While cabinet lock installation is a genuine DIY task, there are situations where calling a qualified locksmith makes sense:
- You need to rekey or master-key a set of locks so they all work from one key — this requires specialist tools and knowledge.
- The lock has failed inside the drawer and you can't open it without damaging the cabinet.
- You're fitting high-security locks to a safe, gun cabinet, or commercial fitout where precise installation is critical.
- You're unsure about the right lock type for a unusual or antique cabinet.
A qualified locksmith can also supply commercial-grade cam locks and hardware that may not be available off the shelf. You can find a trusted local locksmith on tradedirectory.co.nz.
