Best Mortar Rake for Grinder: Top Diamond Bits for Brickwork and Repointing
Finding the right mortar rake or mortar bit for an angle grinder is essential for clean, precise repointing and mortar removal. The following selections focus on diamond-coated tools designed for fast cutting, long life, and minimal chipping. Each product is compatible with standard 5/8-11 grinder spindles and offers options for delicate work behind pipes or behind masonry as needed. The list covers a range of diameters and lengths to fit various projects, from tight joints to larger mortar removal tasks.
| Product | Brand | Thread | Length | Notes |
|---|---|---|---|---|
| KURSTOL Diamond Mortar Raking Bit (5/16″ x 4″) | KURSTOL | 58-11 | 4″ (100 mm diamond height) | Intricate work, long reach |
| KURSTOL Diamond Mortar Raking Bit (5/16″ x 4-4/5″) | KURSTOL | 5/8″-11 | ~4.5″ (114 mm diamond height) | Carbide head option for fast removal |
| Faithfull FAIMMR10 Masonry And Mortar Rake | Faithfull | – | 10 mm diameter routing tool; typical length varies | Versatile masonry routing |
| KURSTOL Diamond Mortar Raking Bit (5/16″ x 1″) | KURSTOL | 58-11 | 1″ (25 mm diamond height) | Precise prep for repointing |
| HIGHDRIL Tuck Point Diamond Bit (4 5/8″ length) | HIGHDRIL | – | 4 5/8″ length | Mortar pin grooving and removal |
KURSTOL Diamond Mortar Raking Bit — 5/16″ x 4″
Designed for brickwork joint mortar removal and masonry grinding, this 5/16″ bit features a 4″ length with 58-11 thread. Vacuum brazed diamonds deliver fast grinding, longer life, and cost efficiency. The 100 mm diamond height supports deeper repointing tasks, including work behind pipes or complete brick removal. Ideal for intricate joints and delicate work, it excels in prep for repointing and in extended mortaring scenarios.
KURSTOL Diamond Mortar Raking Bit — 5/16″ x 4-4/5″
This variant combines a 5/8″-11 thread with a longer 168 mm total length and a 114 mm diamond height. The carbide head adds abrasion resistance for tougher spots, while the vacuum brazed diamonds ensure faster material removal and longer service life. Suitable for aggressive mortar removal and larger joints, it supports efficient workflows in masonry restoration projects.
Faithfull FAIMMR10 Masonry And Mortar Rake
This multi-purpose 10 mm diameter routing tool is designed for use with mains-powered drills with a 1/2 inch chuck. It is ideal for removing old and soft mortar between brick courses before repointing. The versatile design supports channeling for cables and piping, offering a practical option when multiple tasks are required in the same project.
KURSTOL Diamond Mortar Raking Bit — 5/16″ x 1″
This 5/16″ bit with a 1″ length fits precise repointing tasks in tighter spaces. Vacuum brazed technology offers fast grinding and extended bit life, while the 58-11 thread ensures compatibility with most standard angle grinders. The bit’s design supports both delicate joint work and controlled removal behind fixtures or corner details.
HIGHDRIL Tuck Point Diamond Bit — 4 5/8″
The HIGHDRIL option covers tuck point applications with a 4 5/8″ length diamond bit designed for wet or dry mortar removal. A 7.2 mm diameter and a 74 mm diamond height provide robust performance for grooving and shaping in concrete and stone. Vacuum brazed diamonds enable efficient cutting with durable wear resistance, suitable for deep joint work and detailed mortar shaping.
IRWIN 10507267 Mortar Rake Starter Kit
IRWIN’s starter kit includes a carbide-tipped mortar rake designed for fast, efficient removal of mortar joints. It is suitable for brickwork re-pointing and for chasing channels for cables and pipes. The kit is commonly used with small angle grinders and an accompanying sole plate, providing a standardized setup for quick restoration work.
PRODIAMANT Carbide Brick Mortar Grout Cutter 8mm
With an 8 mm diameter and 26 mm length, this ProDiamant grout cutter supports precise joint cleaning and renovation in clinker and lime/cement mortar applications. The three carbide cutting edges deliver clean cuts and extended service life. It’s designed for 5/8-11 thread mounting on angle grinders, enabling efficient rapid mortar removal tasks.
PRODIAMANT Carbide Brick Mortar Grout Cutter 10mm
This 10 mm cutter offers a similar European-engineered design, with a 26 mm working length and 3 carbide cutting edges for thorough joint renovation. Its 5/8-11 thread is common for angle grinders, matching the requirements for professional masonry work, brick facades, and clinker restoration projects.
Buying Guide
When selecting a mortar rake or grinder bit, consider these factors:
- Diameter and length: Choose a size that fits your joint width and reach needs. Longer bits reach behind pipes and thicker joints, while shorter bits offer more control in narrow gaps.
- Thread compatibility: Most angle grinders use 5/8-11. Verify thread type to ensure proper fit and safe operation.
- Diamond vs carbide: Diamond-coated bits excel at cutting through hard masonry with minimal chipping, while carbide heads provide strong abrasion resistance for faster junk removal and edge shaping.
- Vacuum brazed diamonds: Look for vacuum brazing as it yields exposed diamonds that grind faster and last longer, with less risk of detaching segments.
- Material applicability: Some bits are optimized for brick, mortar joints, or clinker. Match the tool to the substrate (brick, stone, concrete) and joint type (soft lime mortar vs. cement-based mortars).
- Wet vs. dry use: Some bits are designed for wet grinding to control dust and reduce heat; others are suitable for dry operation. Consider dust management and workspace safety.
- Carbide head options: For particularly tough or abrasive joints, carbide-tipped versions can improve abrasion resistance and edge retention.
- Depth of cut: Deeper cuts remove more material per pass but may require slower feed rates to avoid overheating and bit wear. Plan multiple shallow passes if needed.
- Usage environment: Behind fixtures, pipes, and in tight cavities, long-reach bits reduce the need for repositioning and reduce the risk of tool snagging.
- Maintenance: Check for wear on diamond edges and verify that the bit remains securely mounted. Replace worn bits to maintain clean joints and avoid undercutting adjacent masonry.