Dart Red Ten MR-6 Mortar Raking Premium Diamond Blades

The Dart Red Ten MR-6 mortar raking blade is one of the more popular choices on site for a reason. It cuts fast, it lasts, and it does exactly what a mortar raking blade is supposed to do without any fuss. Available in 115mm and 125mm with a 22mm bore, it fits straight onto most standard angle grinders. The 8mm segment height is what sets it apart from cheaper alternatives — more diamond, longer life, less time swapping blades mid-job.

Mortar raking is one of those jobs that sounds simple until you’ve done a couple of hours of it in the August sun. The right blade makes a serious difference. A blade that grabs, drags, or glazes over quickly turns a one-day repointing prep into two. The MR-6 is designed to stay sharp and cut cleanly through standard brick and block mortar joints, which means you spend your time doing the job rather than fighting the tool.

Where the Dart Red Ten MR-6 Gets Used

This blade is built specifically for mortar raking prior to repointing. It removes old, weathered, or failing mortar from joints cleanly so fresh mortar or coloured repointing compound can bond properly. Without a clean rake, repointing fails early — the new material sits on dust and loose debris rather than bonding to the masonry face. Using the right blade here is not optional, it is part of doing the job correctly.

Segment Life and Cut Quality

The 8mm segment height on the MR-6 gives you noticeably more working life than blades running 6mm or less. Diamond blades wear from the tip inward, so the extra height directly translates to more linear metres of joint before the blade needs replacing. Combined with the fast cutting action Dart built into this design, you get a blade that moves through work at pace without burning out prematurely. The Red Ten range sits in Dart’s performance tier — not a budget blade, not overpriced. Just a reliable tool that earns its place in the bag.