Bosch Angle Grinder Disc Compatibility (2026)
Complete guide to finding the right discs for every Bosch grinder model
Bosch is synonymous with quality power tools, and their angle grinders—both cordless and corded—are trusted by professionals and DIY enthusiasts across the UK. But with multiple model ranges (GWS, GWX, BITURBO) and three common disc sizes (115mm, 125mm, 230mm), choosing compatible discs can feel overwhelming.
This guide cuts through the confusion. We’ll walk you through every current Bosch model, explain the revolutionary X-LOCK system, and recommend the best discs for your specific grinder.
Quick Compatibility Table: Bosch Angle Grinder Models (2026)
| Model | Type | Disc Size | Bore Diameter | Max RPM | X-LOCK? | Battery System |
|---|---|---|---|---|---|---|
| GWX18V-7 | Cordless | 115mm | 22.23mm | 11,500 | ✓ Yes | ONE+18V |
| GWX18V-10 | Cordless | 115mm | 22.23mm | 11,500 | ✓ Yes | ONE+18V |
| GWS18V-7 | Cordless | 115mm | 22.23mm | 11,500 | ✗ No (standard) | ONE+18V |
| GWX18V-15SC | Cordless | 125mm | 22.23mm | 10,000 | ✓ Yes (BITURBO) | BITURBO 18V |
| GWS18V-10 | Cordless | 125mm | 22.23mm | 10,000 | ✗ No (standard) | ONE+18V |
| GWS7-115 | Corded | 115mm | 22.23mm | 11,000 | ✗ No | Mains (230V) |
| GWS13-125CIE | Corded | 125mm | 22.23mm | 12,250 | ✗ No | Mains (230V) |
| GWS22-230 | Corded | 230mm | 22.23mm | 6,600 | ✗ No | Mains (230V) |
Key note: All Bosch grinders use the standard 22.23mm (7/8 inch) bore diameter. This means virtually any angle grinder disc designed for this bore will fit—whether Bosch-branded or a third-party alternative.
X-LOCK System Explained: The Game-Changer
Bosch’s X-LOCK system is one of the most significant innovations in angle grinder technology. Here’s what you need to know:
What Is X-LOCK?
X-LOCK is a tool-free, bayonet-style disc mounting system. Instead of using a spanner to tighten a conventional nut, X-LOCK discs simply snap onto the spindle—no tools required. A quarter-turn clockwise and the disc is locked in place. Removal is equally simple: quarter-turn anticlockwise and lift off.
Key Advantages
- Speed: Change discs in seconds, not minutes. Perfect for switching from cutting to grinding mid-job.
- Safety: Reduces risk of hand injuries from wrenches. No pinch points when mounting/removing.
- Consistency: X-LOCK discs are always secured at the correct tension—human error eliminated.
- Professional workflow: Favoured by contractors who swap discs frequently.
X-LOCK Compatibility Rules
Rule 1: X-LOCK discs fit X-LOCK grinders.
Models with “GWX” in the name (e.g., GWX18V-7, GWX18V-15SC) have the X-LOCK system. They accept X-LOCK discs exclusively for optimal performance.
Rule 2: Standard discs fit X-LOCK grinders (backwards compatible).
If you have a GWX model but only standard discs available, they will still fit using a conventional nut—the grinder is backwards compatible. You lose the tool-free convenience, but the grinder works normally.
Rule 3: X-LOCK discs do NOT fit standard grinders.
The GWS models (without the X) cannot accept X-LOCK discs. The spindle design is different. Attempting to force an X-LOCK disc onto a GWS grinder will damage the spindle.
Which Bosch Models Have X-LOCK?
- GWX18V-7 — 115mm X-LOCK cordless
- GWX18V-10 — 115mm X-LOCK cordless (newer, brushless)
- GWX18V-15SC — 125mm X-LOCK BITURBO cordless (heavy-duty)
All other Bosch models in this guide use standard mounting.
X-LOCK Discs Available
Bosch produces a full range of X-LOCK cutting discs, flap discs, and wire wheels. Major third-party manufacturers (Makita, DeWalt, 3M, Pferd) also make X-LOCK compatible discs. You’ll find them clearly labelled “X-LOCK compatible” or “Bosch X-LOCK” on packaging and product listings.
18V Cordless Models: GWS vs GWX
GWS18V-7 (Standard 115mm)
Disc size: 115mm | Bore: 22.23mm | RPM: 11,500 | X-LOCK: No
The entry-level cordless angle grinder. Perfect for occasional cutting and light grinding. Works with any standard 115mm disc. Powered by Bosch ONE+18V batteries (1.3–5.0Ah). Lightweight and easy to handle for extended use.
GWS18V-10 (Standard 125mm)
Disc size: 125mm | Bore: 22.23mm | RPM: 10,000 | X-LOCK: No
A step up from the GWS18V-7. The larger 125mm disc provides greater cutting capacity without significantly increasing weight. Ideal for DIY projects and professional light-duty work. Accepts any standard 125mm disc.
GWX18V-7 (X-LOCK 115mm)
Disc size: 115mm | Bore: 22.23mm | RPM: 11,500 | X-LOCK: Yes
The X-LOCK version of the 115mm grinder. Same cutting power as the GWS18V-7, but with tool-free disc changes. If you own other Bosch X-LOCK tools, this grinder integrates seamlessly into your ecosystem. Requires X-LOCK discs for the quick-change benefit (standard discs still work with a conventional nut, but defeat the purpose).
GWX18V-10 (X-LOCK 115mm, Brushless)
Disc size: 115mm | Bore: 22.23mm | RPM: 11,500 | X-LOCK: Yes
The newest X-LOCK 115mm model. Brushless motor delivers longer runtime, higher efficiency, and less maintenance compared to the older GWX18V-7. Recommended if you’re building a Bosch X-LOCK ecosystem or value cutting-edge technology.
GWX18V-15SC (X-LOCK 125mm BITURBO)
Disc size: 125mm | Bore: 22.23mm | RPM: 10,000 | X-LOCK: Yes | BITURBO battery: Yes
The professional-grade cordless grinder. BITURBO batteries deliver twice the power of ONE+18V, enabling sustained high-torque grinding and cutting without bogging down. X-LOCK system for rapid disc changes. The larger 125mm disc and powerful motor make this the go-to cordless choice for professionals tackling heavy jobs. Expect longer runtimes and more aggressive cutting performance.
Corded Grinder Models: Power Without Limits
GWS7-115 (115mm Entry-Level)
Disc size: 115mm | Bore: 22.23mm | RPM: 11,000 | Power: 700W
Budget-friendly corded grinder ideal for occasional DIY use. Lightweight and nimble. Perfect for cutting rebar, angle iron, and light grinding. Works with any 115mm disc. No batteries to charge—unlimited runtime as long as there’s mains power.
GWS13-125CIE (125mm Professional)
Disc size: 125mm | Bore: 22.23mm | RPM: 12,250 | Power: 1,300W
A serious workhorse. The larger disc and powerful motor make this ideal for sustained cutting and heavy grinding. The “CIE” designation includes Bosch’s constant-electronics system, which maintains RPM under load. Professional-grade reliability. Accepts any 125mm disc.
GWS22-230 (230mm Heavy-Duty)
Disc size: 230mm | Bore: 22.23mm | RPM: 6,600 | Power: 2,200W
The big brother. A 230mm disc cuts deeper and faster than 125mm. Lower RPM (6,600) reflects the larger mass and need for safety at higher rim speeds. Essential for serious construction, fabrication, and metalworking. Requires two hands and proper technique, but delivers unmatched cutting capacity. All 230mm discs (22.23mm bore) fit.
Bosch-Branded Discs: Quality and Selection
Bosch manufactures a full range of angle grinder discs under the brand. Bosch discs are known for:
- Superior abrasive quality: Consistent grain and binder deliver clean cuts and longer life.
- Safety focus: Bosch discs are manufactured to strict safety standards and rarely delaminate or shatter.
- Broad selection: Cutting discs, flap discs, wire wheels, diamond blades, and grinding wheels across all common sizes.
- Premium pricing: You pay more, but you get reliability and performance.
Popular Bosch Disc Ranges
Rapido Cutting Discs
Fast cutting, long life. Ideal for steel, stainless steel, and cast iron. Available in 115mm, 125mm, and 230mm. Price: £1.20–£2.50 per disc (depending on size).
Expert Flap Discs
Combination of grinding and finishing. Better surface finish than cutting discs. Ideal for weld preparation and finishing. £1.80–£3.20 per disc.
Standard Grinding Wheels
Traditional grey grinding stones for metal and concrete. Lower cost than cutting discs. £0.80–£1.50 per disc.
X-LOCK Discs (GWX models)
Full range available: cutting, flap, grinding, wire wheels—all with the X-LOCK interface. Prices comparable to standard discs (no premium for the mounting system).
Best Discs for Bosch Grinders (Recommendations & Affiliate Links)
While Bosch-branded discs are excellent, there are competitive alternatives. Here are our top picks for different applications:
Best All-Around Cutting Discs
Bosch Rapido Cutting Discs (125mm, 10-pack)
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Fast, reliable, and consistent. If you’re loyal to the brand, these deliver excellent value in bulk packs. Ideal for cutting steel, stainless, and cast iron.
Makita Cutting Discs (125mm, 10-pack)
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Comparable quality to Bosch at slightly lower cost. Fit all Bosch grinders (22.23mm bore). Trusted by professionals.
3M Silver Cutting Discs (115mm/125mm)
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Premium option. Exceptional surface finish and cut quality. Longer life per disc offsets higher cost. Excellent for precision cutting.
Best Budget Cutting Discs
Silverline Cutting Discs (125mm, 10-pack)
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Solid value. Not Bosch quality, but reliable for general cutting. Great for occasional users or high-volume work where cost matters.
Faithfull Cutting Discs (115mm/125mm)
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British brand with a long heritage. Budget-friendly without sacrificing reliability. Popular with UK DIY enthusiasts.
Best Flap Discs (Grinding & Finishing)
Bosch Expert Flap Discs (125mm, 40 grit)
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Superior finish quality. Ideal for weld grinding and surface finishing. Lasts longer than standard grinding wheels. Recommended if you value the final finish.
Makita Flap Discs (125mm, mixed grit pack)
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Variety pack with 60 and 120 grit. Excellent versatility for different finishing jobs. Cost-effective per disc.
Best for X-LOCK Models
Bosch X-LOCK Cutting Discs (115mm/125mm, 5-pack)
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Engineered specifically for X-LOCK grinders. Snap on and off in seconds. No compromise on cut quality. Recommended if you own a GWX model.
Makita X-LOCK Compatible Discs
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Third-party X-LOCK alternative. Same tool-free convenience as Bosch X-LOCK discs, often at lower cost. Fully compatible with GWX grinders.
Best Wire Wheels for Rust Removal
Bosch Knotted Wire Wheel (125mm)
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Aggressive rust and paint removal. Knotted design resists tangling. Perfect for restoration work.
Makita Twisted Wire Wheel (115mm/125mm)
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Finer wire for more delicate surfaces. Better for finishing than the knotted style.
Watch: Video Guide
Frequently Asked Questions
Can I use standard discs on a Bosch X-LOCK grinder?
Yes, standard discs will fit X-LOCK grinders—but only with a conventional nut. The grinder is backwards compatible. You lose the tool-free convenience of X-LOCK, but the grinder functions normally. However, it defeats the purpose of owning an X-LOCK model. If you regularly use standard discs, a GWS model is more cost-effective.
Can I use X-LOCK discs on a standard Bosch GWS grinder?
No. X-LOCK discs will not fit GWS grinders. The spindle design is completely different. Attempting to force an X-LOCK disc onto a GWS grinder will damage the spindle and is dangerous. Always match the disc type to your grinder model.
What’s the difference between GWS and GWX Bosch models?
“GWS” = standard mounting (spanner required for disc changes). “GWX” = X-LOCK tool-free mounting. Both use the same 22.23mm bore discs. Choose GWS for cost savings if you rarely change discs; choose GWX if you frequently swap discs or prefer modern convenience.
Do all Bosch discs fit all Bosch grinders?
Not quite. All Bosch grinders use the same 22.23mm bore, so disc diameter doesn’t restrict compatibility. However, X-LOCK discs only fit X-LOCK grinders (GWX models). Standard discs fit all grinders. Always check your grinder model before purchasing discs.
What’s BITURBO, and why does the GWX18V-15SC use it?
BITURBO is Bosch’s dual-power battery system that delivers twice the power of standard ONE+18V batteries. The GWX18V-15SC is marketed as a heavy-duty professional tool, and BITURBO ensures it can handle sustained, high-torque grinding without losing power. If you already own ONE+18V batteries, this grinder still works (at reduced power)—but BITURBO batteries unlock its full potential.
Is a 230mm grinder worth it over 125mm?
Yes, if you regularly cut thick steel or make long cuts. The 230mm disc cuts deeper and faster. However, it’s heavier, requires more experience to control safely, and the discs are more expensive. For occasional DIY use, 125mm is sufficient. For construction, fabrication, or professional work, 230mm is the standard.
Summary: Choose Your Bosch Grinder and Discs Wisely
Bosch offers a comprehensive range of angle grinders for every use case—from cordless 115mm DIY tools to heavy-duty 230mm corded professionals. The X-LOCK system is a genuine innovation for users who value speed and safety when changing discs.
Quick decision guide:
- Occasional DIY use: GWS18V-7 (115mm cordless) with budget cutting discs.
- Regular DIY / light professional: GWS18V-10 or GWX18V-10 (125mm cordless) with Bosch or Makita discs.
- Professional heavy-duty: GWX18V-15SC BITURBO (cordless) or GWS22-230 (corded).
- Tool-free disc changes: Any GWX model paired with X-LOCK discs.
All Bosch grinders accept the standard 22.23mm bore discs, making your choices flexible. Whether you stick with Bosch-branded discs or explore third-party alternatives, you’ll find compatible options across every price point.
