Armeg

Armeg wood drill bits for running cables through joists, studs and timber frames on first fix.

We stock Armeg flat wood bits (spade bits) in 16, 20, 25 and 32mm (160mm long, hex shank), Woodbeaver flat bits in 20, 25 and 32mm with long 20 and 25mm versions, and a 7 piece Woodbeaver flat bit set. For deeper or cleaner holes there are Woodbeaver auger bits in 20, 25 and 32mm, a 25mm nail proof bi-metal Woodbeaver, and a 230mm quick change extension rod for hard to reach joists.

Live stock on the common sizes. Need a hand picking bits for a first fix? Call the branch on 01656 765 300.

Armeg wood bit buying questions

Should I use a spade bit or an auger bit for cable runs?

Flat bits, also called spade bits, are quick and cheap for short runs through studs and noggins. Auger bits like the Woodbeaver cut cleaner, pull themselves through the timber and clear chips better, so they suit deep joists and lots of holes on a first fix.

What size hole do I need for twin and earth cable?

It depends on how many cables go through each hole. 20mm suits one or two runs of 2.5mm twin and earth, and 25 or 32mm gives room for several cables or larger sizes. Keep holes in line along the run so the cable pulls through easily.

What is a nail proof wood bit?

A nail proof bit, like the Armeg 25mm Woodbeaver bi-metal, is built to cut through hidden nails and screws in reclaimed or old timber without ruining the bit. It is the safe choice when rewiring older houses.

How do I drill through joists that are hard to reach?

Fit the Armeg 230mm quick change extension rod to give the bit extra reach between joists and under floors. The long Woodbeaver flat bits in 20 and 25mm also help on deeper timbers.

Where should I drill holes in floor joists?

Drill on the centre line of the joist depth, away from the ends and the middle of the span, and keep holes small relative to the joist. Check the building regulations guidance for your job, and if in doubt, ask the building control officer or a structural engineer.