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Working with a Wall Chaser

If you want to create grooves in walls to conceal piping, a wall chaser – also known as a wall groove router – is the tool for the job. However, there are several things to keep in mind for a neat result and safety when using a wall chaser.

How Does a Wall Chaser Work?

Spit wall chaser with vacuum cleaner

A wall chaser cuts two parallel grooves into the wall. These machines have two cutting discs, which can be adjusted closer together or further apart to carve out a narrower or wider slot. The depth of the groove can also be adjusted. After cutting, remove the strip in the middle of the groove with a chisel.

Preparation

First and foremost, it’s crucial to know what type of wall you’ll be cutting into. Interior walls of brick or sand-lime brick pose no problem for the standard cutting discs that most wall chasers are equipped with. However, for a concrete wall, you will need to use special diamond cutting blades.

Clean the area where you’re going to cut the groove and remove any wallpaper if necessary. Then, draw the line of the groove on the wall. Use a spirit level or plumb line to work straight. Another option is to screw a thin wooden slat along the drawn line on the wall and hold the side of the chaser against the slat while cutting.

Set the cutting discs to the desired width of the groove and adjust the depth. Most chasers allow you to adjust both the width and depth of the groove between approximately 8mm and 30mm, enabling you to cut grooves of the correct dimensions for both electrical cables and water pipes.

Cutting a Groove

Turn on the wall chaser and place the soleplate against the wall. Let the spinning discs drop into the wall and move the machine across the wall surface at a constant speed without forcing it. The direction of progress should be opposite to the rotation direction of the discs to prevent the wall chaser from being pushed out of the cutting area. When you reach the end of the groove, lift the machine out of the groove before turning it off. Now, you can easily chisel away the remaining material between the cuts.

Safety Tips for Using a Wall Chaser

professional works with wall chaser
  • Using a wall chaser creates a lot of dust. Preferably, use a machine you can connect a vacuum cleaner or protect yourself with a dust mask, safety goggles, and ear protection.
  • Be aware that the cutting discs continue to spin for a moment after the machine is turned off.
  • Be especially careful in corners or where there are sharp edges to prevent the machine from jamming or causing kickback.
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