DeWalt Angle Grinder Disc Compatibility (2026) — What Fits Every Model
Author: Tool Compatibility Team | Published: March 2026 | Updated: March 2026
DeWalt angle grinders range from compact 18V XR cordless models to the powerful 54V FlexVolt cordless and traditional corded grinders. Each platform—18V, 54V, and corded—uses different disc sizes and specifications. This guide covers every DeWalt grinder model and shows you exactly which discs fit, plus our top recommendations for cutting and grinding across all sizes.
Quick DeWalt Angle Grinder Disc Compatibility Table
| Model | Disc Size | Bore Diameter | Max RPM | Type |
|---|---|---|---|---|
| DCG405N | 125mm | 22.23mm (M14 thread) | 10,000 RPM | 18V XR Cordless |
| DCG412N | 125mm | 22.23mm (M14 thread) | 10,000 RPM | 18V XR Cordless (older model) |
| DCG418NT | 125mm | 22.23mm (M14 thread) | 10,000 RPM | 54V FlexVolt Cordless |
| DCG460N | 230mm | 22.23mm (M14 thread) | 6,000 RPM | 54V FlexVolt Cordless (2x batteries) |
| DWE4206 | 115mm | 22.23mm (M14 thread) | 12,000 RPM | Corded (1100W) |
| DWE4257 | 125mm | 22.23mm (M14 thread) | 11,000 RPM | Corded (1500W) |
Key point: All DeWalt angle grinders use the M14 thread bore (22.23mm), the industry standard. This makes compatibility simple: match the disc diameter to your grinder and stay within the RPM rating.
18V XR Cordless Grinders
DeWalt’s 18V XR platform is their entry-to-mid-range cordless option. Lightweight, convenient for DIY and light trade use, and compatible with thousands of other DeWalt 18V XR tools.
DCG405N (125mm) ठ — The Most Popular DeWalt Cordless
The DCG405N is DeWalt’s bestselling cordless grinder. Trusted by DIYers and tradespeople, it strikes a balance between power, runtime, and portability.
- Disc size: 125mm (5 inches)
- Bore: M14 (22.23mm)
- Max RPM: 10,000
- Battery: 18V XR 1.3–5.0Ah (sold separately)
- Power: Brushless motor for efficiency
- Compatible discs: Any 125mm M14 disc rated for 10,000 RPM or higher
Best for: Cutting and grinding metal, light masonry work, edge finishing. The compact size makes it ideal for tight spaces and overhead work.
Battery note: The DCG405N’s runtime depends on battery capacity. A 1.3Ah battery gives ~15–20 minutes of continuous use; upgrade to a 5.0Ah for ~60–90 minutes. See our 18V XR battery guide for detailed recommendations.
DCG412N (125mm) — Older 18V XR Model
The DCG412N is the predecessor to the DCG405N. Specifications are identical, but it’s increasingly hard to find new.
- Disc size: 125mm
- Bore: M14
- Max RPM: 10,000
- Battery: 18V XR
- Compatible discs: Same as DCG405N—any 125mm M14 disc rated 10,000 RPM or higher
Upgrade path: If you own a DCG412N and batteries are failing, upgrading to the newer DCG405N is seamless—same battery platform, same disc compatibility.
54V XR FlexVolt Cordless Grinders
DeWalt’s 54V FlexVolt platform is their professional-grade cordless system. More powerful than 18V, longer runtime, and designed for sustained job-site work.
DCG418NT (125mm) — 54V FlexVolt Powerhouse
The DCG418NT is a lightweight 125mm grinder that runs on dual 54V batteries (or one 54V battery in reduced-power mode). It delivers consistent torque without the constraints of corded power cables.
- Disc size: 125mm
- Bore: M14
- Max RPM: 10,000
- Battery: 54V XR FlexVolt 2x 5.0Ah (recommended) or 1x 9.0Ah (sold separately)
- Power: 1500W equivalent brushless motor
- Compatible discs: Any 125mm M14 disc rated for 10,000 RPM or higher
Best for: Professional metalworking, fabrication, stainless steel cutting. The dual-battery setup provides excellent sustained power—ideal if you have other FlexVolt tools on site.
Disc note: Whilst the DCG418NT and DCG405N share identical disc compatibility (125mm M14, 10,000 RPM), the FlexVolt delivers more consistent power for heavy-duty applications.
DCG460N (230mm) ठ — 54V FlexVolt Large Disc Beast
The DCG460N is DeWalt’s cordless 230mm grinder—a rare and impressive tool. Two 54V batteries deliver serious stock-removal power without a mains cable.
- Disc size: 230mm (9 inches)
- Bore: M14
- Max RPM: 6,000
- Battery: 54V XR FlexVolt 2x 5.0Ah minimum (2x 9.0Ah recommended for long jobs)
- Power: 2000W equivalent
- Compatible discs: Any 230mm M14 disc rated for 6,000 RPM or higher
Game-changer: The cordless 230mm format eliminates cable management on large jobs. Pair with a 2x 9.0Ah battery set for nearly unlimited runtime on job sites.
Large disc safety: 230mm discs generate high torque. Always wear a full face shield, ensure guards are correctly positioned, use both hands, and brace yourself for kickback. Check the clamping flange for damage before each use.
Corded Grinders
DeWalt’s corded angle grinders are traditional, reliable, and deliver consistent mains-powered performance. No battery dependency, ideal for stationary workshop use or extended job-site deployments.
DWE4206 (115mm)
A compact 115mm corded grinder—lightweight, single-handed, and quick for detail work. Often overlooked in favour of cordless, but excellent value.
- Disc size: 115mm (4.5 inches)
- Bore: M14
- Max RPM: 12,000
- Power: 1100W
- Compatible discs: Any 115mm M14 disc rated for 12,000 RPM or higher
Best for: Finishing work, precision cutting, edge grinding, detail metalworking. The high RPM is excellent for thin cuts and flap disc finishing.
DWE4257 (125mm)
DeWalt’s mid-range corded 125mm grinder. Solid choice for workshop use, fabrication, and trade work where extended runtime is essential.
- Disc size: 125mm
- Bore: M14
- Max RPM: 11,000
- Power: 1500W
- Compatible discs: Any 125mm M14 disc rated for 11,000 RPM or higher
Workshop standard: The DWE4257 is a workhorse in small workshops. No battery anxiety, consistent power, and ready whenever you need it.
DeWalt-Branded Discs vs Third-Party Alternatives
DeWalt sells their own range of grinding and cutting discs, typically available through major tool retailers and online. Should you buy DeWalt-branded?
Pros of DeWalt-branded discs:
- Guaranteed compatibility with all DeWalt grinders
- Tested for exact RPM specifications
- Convenient multipacks reduce reorder frequency
- Available at most UK tool retailers
Cons:
- Premium pricing compared to independent brands
- Fewer specialist disc types (e.g., stone-specific, masonry) than Norton or Silverline
Third-party discs are perfectly legal and safe as long as they are:
- The correct diameter (115mm, 125mm, or 230mm)
- M14 bore (standard for DeWalt)
- Rated for your grinder’s maximum RPM or higher
- From an established manufacturer (Norton, Silverline, Draper, Makita)
My recommendation: Buy third-party discs from brands like Silverline or Norton for cutting work (better value), and DeWalt-branded if you want guaranteed matching with your grinder’s exact specifications.
Best Discs for DeWalt Angle Grinders
Best 115mm Cutting Discs for DeWalt DWE4206
Silverline 10-Pack 115mm Metal Cutting Discs
- M14 bore, 22.23mm thickness
- Rated for 13,200 RPM (safe for DWE4206 at 12,000 RPM)
- Clean, precise cuts on steel and aluminium
- ~£0.60 per disc
Norton Expert Metal Cutting Discs 115mm
- Premium cutting performance
- Rated for 13,200 RPM
- Excellent for stainless steel and tough materials
- ~£0.85 per disc
Best 125mm Cutting Discs for DeWalt (DCG405N, DCG418NT, DWE4257)
Silverline 10-Pack 125mm Metal Cutting Discs
- M14 bore, rated for 12,200 RPM
- Safe for all DeWalt 125mm models (DCG405N, DCG418NT, DWE4257)
- Fast, clean cuts on ferrous and non-ferrous metals
- ~£0.70 per disc
Draper Expert 125mm Metal Cutting Discs (5-Pack)
- UK-made, premium quality assured
- Rated for 13,000 RPM
- Slightly higher cost but superior longevity
- ~£1.10 per disc
Best 230mm Cutting Discs for DeWalt DCG460N
Silverline 230mm Metal Cutting Discs (5-Pack)
- M14 bore, rated for 8,500 RPM (safe for DCG460N at 6,000 RPM)
- Heavy-duty construction for extended cuts
- ~£2.50 per disc
Norton Expert 230mm Metal Cutting Discs
- Premium choice for professional 230mm work
- Rated for 8,500 RPM
- Excellent for high-volume fabrication
- ~£3.20 per disc
Best Flap Discs for DeWalt Grinders (All Sizes)
Silverline 115mm Flap Discs (10-Pack, 60 Grit)
- For DWE4206, ideal for grinding and finishing
- Rated for 13,200 RPM
- ~£0.50 per disc
Silverline 125mm Flap Discs (10-Pack, 60 Grit)
- Works on DCG405N,$DCG418NT, DWE4257
- Rated for 12,200 RPM
- Excellent for stock removal and surface preparation
- ~£0.60 per disc
Watch: Video Guide
Frequently Asked Questions (FAQ)
What disc fits the DeWalt DCG405N?
The DeWalt DCG405N accepts 125mm discs with an M14 bore (22.23mm) and a maximum RPM rating of 10,000 or higher. Compatible disc types include cutting discs, flap discs, grinding wheels, and stone cutting discs. Any disc that meets these specifications—whether DeWalt-branded, Silverline, Norton, or Makita—will fit and work perfectly on the DCG405N.
Is the DeWalt DCG418NT worth upgrading from the DCG405N?
The DCG418NT (54V FlexVolt) and DCG405N (18V XR) share identical disc compatibility (125mm M14, 10,000 RPM), but the FlexVolt delivers more consistent power and longer runtime. Upgrade if: (1) you already own FlexVolt batteries for other tools, (2) you do heavy-duty cutting or fabrication, or (3) you need extended runtime without recharging. For light DIY use, the DCG405N is sufficient and more affordable. The choice depends on your existing tool ecosystem and workload intensity.
Can I use Makita or Bosch discs on a DeWalt angle grinder?
Yes, absolutely. DeWalt, Makita, and Bosch all use the M14 bore standard on their angle grinders. A Makita 125mm disc with M14 bore and 10,000+ RPM rating will fit and work on any DeWalt 125mm grinder. Cross-brand compatibility is guaranteed as long as you verify: (1) disc diameter (115mm, 125mm, 230mm), (2) M14 bore, and (3) RPM rating meets or exceeds your grinder’s maximum. Brand is irrelevant—compatibility is determined by these specs alone.
What’s the advantage of the cordless DeWalt DCG460N 230mm over a corded grinder?
The DCG460N 230mm cordless delivers mobility without mains cable constraints—ideal for site work, outdoor locations, and jobs where cable routing is difficult. Corded grinders offer unlimited runtime (no battery swap). Choose cordless if you prioritise portability and already own FlexVolt batteries; choose corded if you work stationary and want zero downtime. Both use identical 230mm discs (M14, 6,000–8,500 RPM).
Summary: DeWalt Angle Grinder Disc Compatibility
All DeWalt angle grinders—18V XR, 54V FlexVolt, and corded—use the M14 bore standard. This means compatibility is straightforward and consistent across the entire range. Whether you own a compact DCG405N or the powerful 230mm DCG460N, you can buy discs from any reputable manufacturer by matching:
- Disc diameter: 115mm, 125mm, or 230mm
- Bore: M14 (22.23mm)
- RPM rating: Equal to or higher than your grinder’s maximum RPM
DeWalt-branded discs offer guaranteed compatibility; Silverline and Norton provide excellent value and identical performance. Stock a mix of cutting and flap discs, and you’ll be equipped for any cutting or grinding task.
