Anyone working with angle grinders knows that sharp drill bits and reliable sharpening tools can dramatically improve accuracy and efficiency. This guide highlights top drill bit sharpener attachments and diamond drill bit sets designed to work with 125 mm to larger grinders. Each option focuses on extending bit life, improving edge quality, and delivering consistent results across common materials like wood, metal, and tile.
| Product | Brand | Type |
|---|---|---|
| Drill Bit Sharpener Attachment for 125mm Angle Grinders | DEEDRR | Sharpening Attachment |
| General Tools Drill Grinding Attachment #825 | General Tools | Sharpening Attachment |
| Liznkjious Drill Bit Sharpener for Grinder | Liznkjious | Sharpening Jig |
| SALI Diamond Core Drill Bits Set | SALI | Diamond Core Bits |
| 1/4″ Dry Diamond Drill Bit Set (2 Packs) | DECKRKAT | Diamond Drill Bits |
Drill Bit Sharpener Attachment for 125mm Angle Grinders
DEEDRR’s sharpener attachment restores 2–13 mm drill bits to near-factory sharpness, extending tool life and reducing bit waste. Its universal fit works with 125 mm angle grinders and standard drill bits in the common 2–13 mm range. The design emphasizes durability with high-strength materials suitable for regular shop use. This option is ideal for users who frequently switch between metal, wood, or masonry drilling tasks and want quick, reliable re-sharpening on the job site.
General Tools Drill Grinding Attachment #825
This sharpening system extends drill bit life by honing both sides of bits to factory-like precision. It features a pivoting neck to accommodate a range of bit angles and standard angles of 88, 68, 59, 49, and 41 degrees. The tool includes a depth-stop-style non-marking cap to protect surfaces and can be clamped in a vice for steady sharpening. It emphasizes versatility for shop and bench work, ensuring consistent point geometry across many drill types.
Liznkjious Drill Bit Sharpener for Grinder
Liznkjious offers a 5-second sharpening capability with adjustable grinding angles of 118° or 135°, covering a wide range of bit types (HSS, cobalt, carbide). Designed for 2–13 mm bits, this sharpener emphasizes quick setup and compatibility with standard 125 mm angle grinders. The included gloves support safe handling during sharpening. The tool aims to deliver rapid edge restoration and extended bit life for on-demand drilling tasks in metal, wood, and masonry contexts.
SALI Diamond Core Drill Bits Set
The SALI Diamond Core Drill Bits Set includes five 1/4” (6 mm) diamond-coated bits with a 1/4” hex shank, designed for glass, ceramic, porcelain, tile, granite, and similar hard materials. Vacuum brazed construction improves heat and wear resistance, enhancing performance and lifespan. The kit is compatible with most angle grinders (5/8-11 thread) or drills using a suitable adapter. Diamond grit and robust construction enable clean, fast holes in tough substrates with reduced chipping.
1/4″ Dry Diamond Drill Bit Set (2 Packs)
DECKRKAT’s 1/4″ diamond core drill bits come in a two-pack, designed for dry and wet drilling on hard materials such as granite, quartz, porcelain, marble, tile, concrete, and bricks. A 5/8-11 thread enables straightforward attachment to angle grinders, wet polishers, or compatible drills. The bits feature a high-quality diamond coating for sharpness and longevity, with guidance indicating a 45-degree approach for precise hole initiation and steady advancement to a vertical position.
Buying Guide: Key Purchase Considerations
When choosing angle grinder drill bit accessories, consider material compatibility, grinder size, and expected work conditions.
- Bit type and material: Diamond-coated bits excel on hard materials (stone, tile, glass), while HSS and carbide bits suit wood and metal. Match the bit to the job for best results and lifespan.
- Grinder compatibility: Ensure the accessory fits your grinder’s disc diameter (commonly 125 mm) and arbor thread (5/8-11 is common for diamond bits).
- Sharpening vs. cutting: Sharpeners restore dull bits for reuse, reducing waste. Diamond core bits are often single-purpose for cutting; keep spare sets for tile or stone work.
- Angle and technique: Proper sharpening angles (118°, 135° for sharpeners) and drilling stance (45° entry, gradual upright) improve results and reduce bit wear.
- Durability and safety: Look for tools with protective depth stops, non-slip shanks, and ergonomic handles. Always wear gloves and eye protection when sharpening or drilling.
Product Comparisons: What Sets Them Apart
- Sharpeners (DEEDRR, General Tools, Liznkjious): Focus on reviving dull bits and extending life, with adjustable angles and compatibility across common drill sizes. Best for routine maintenance and bench use.
- Diamond core bits (SALI, DECKRKAT): Target hard materials with high durability and precise hole capability. Ideal for tiling, stone, and high-hardness substrates, often require compatible grinders.
- Convenience and safety: Some sets include gloves or come with quick-change features. Consider whether you need a quick-change system for rapid on-site work.