Drill Bit & Chuck Compatibility Guide — UK Tool Compatibility Hub
Finding the right drill bit for your tool shouldn’t be confusing. Yet every week, UK DIYers and professionals accidentally purchase incompatible bits, waste money, and damage equipment. The problem: different chuck systems, SDS variants, and proprietary designs mean a bit that fits one drill won’t fit another.
This complete guide cuts through the complexity. Whether you’re working with SDS-Plus, SDS-Max, standard three-jaw chucks, or specialised systems like Festool’s Centrotec, you’ll find definitive answers on what fits what—and why compatibility matters more than you might think.
The Compatibility Problem: Why It Matters
Drill bit compatibility isn’t just about physical fit. Using the wrong bit shank in an incompatible chuck creates dangerous runout (wobbling), reduces precision, and can damage both the drill and the bit. SDS rotary hammers, for example, rely on groove-locking to transmit hammer force—a standard round shank simply won’t grip properly.
The core issue: manufacturers use different chuck systems to suit different applications. A 13mm three-jaw chuck works perfectly for general-purpose drilling in wood and metal. An SDS-Plus system excels at hammer drilling into masonry. But mixing them causes problems.
Understanding Chuck Types & SDS Systems
Most UK power tools fall into one of these categories:
- Standard three-jaw chucks: Grip smooth, round shanks. Universal fit for general drilling. Found on budget and mid-range drills.
- SDS-Plus: 10mm grooved shank. Entry-level rotary hammers and professional cordless drills.
- SDS-Max: 18mm grooved shank. Heavy-duty rotary hammers and breakers.
- Proprietary systems: Festool Centrotec, Bosch Uneo SDS-Quick, Hilti CPC—brand-specific solutions.
You can’t interchange these. A SDS-Plus bit won’t fit a SDS-Max drill. And a standard bit won’t work safely in an SDS chuck, even with adapters.
Browse by Topic
SDS-Plus vs SDS-Max
Confused about which SDS system your drill uses? This detailed comparison breaks down the physical differences, size ranges, and compatibility between SDS-Plus and SDS-Max. Learn when adapters might help—and why they often don’t.
Using SDS Bits in Standard Drills
Can you use SDS bits in a normal drill? The short answer is no—but we explain exactly why, what adapters exist, and what you should do instead. Includes budget-friendly SDS drill recommendations.
Bits by Material
Which bit type for wood, steel, brick, concrete, or ceramic? Our material-by-material reference covers bit types (HSS, TCT, carbide, diamond), speeds, feeds, and common mistakes. Includes recommended products.
Browse by Brand
Find compatibility information for your tool brand:
Quick Reference: Chuck Type & Compatible Shanks
| Chuck Type | Shank Diameter | Shank Design | Compatible Bit Shanks | Typical Use |
|---|---|---|---|---|
| 3-jaw standard | 6–13mm | Smooth round | Round shanks only | General drilling, wood, metal |
| SDS-Plus | 10mm | 2 open + 2 closed grooves | SDS-Plus bits only | Rotary hammers, percussion drilling |
| SDS-Max | 18mm | 3 open + 2 closed grooves | SDS-Max bits only | Heavy breaker hammers, industrial |
| SDS-Quick | 10mm | Proprietary slot design | SDS-Quick bits (Bosch Uneo only) | Bosch Uneo cordless drills |
| Festool Centrotec | Rotary coupling | Magnetic quick-change | Centrotec-compatible bits | Festool drills, precision drilling |
Common UK Questions About Drill Bit Compatibility
Can I use any bit in an SDS drill?
No. SDS chucks are designed to lock groove-sided shanks and transmit hammer force through those grooves. A smooth round shank (like a standard HSS bit) will slip and won’t grip securely. You can fit a keyless chuck adaptor to use standard bits, but you’ll lose hammer functionality. For rotary hammer work, always use proper SDS bits.
What’s the difference between SDS-Plus and SDS-Max?
Shank size and groove design. SDS-Plus uses a 10mm shank with 2 open grooves and 2 closed grooves. SDS-Max uses an 18mm shank with 3 open grooves and 2 closed grooves. They’re physically incompatible—different tools use different systems based on intended power and precision. See our detailed comparison guide for full technical details.
Are SDS adapters reliable?
Adapters that let you use standard bits in SDS chucks exist, but they’re not ideal. They introduce runout (wobbling), reduce precision, and you lose hammer functionality. Similarly, SDS-Max to SDS-Plus adapters exist but reduce accuracy due to the size difference. For best results, buy the correct bit for your tool’s chuck type.
Which brands make the best SDS bits?
The manufacturers themselves—Makita, DeWalt, Bosch, Milwaukee, and Hilti—produce excellent branded bits optimised for their tools. Aftermarket brands like Silverline and Irwin also offer good value. Always match the SDS type and size to your drill. Budget bits may save money upfront but often wear faster and deliver poor results in hard masonry.
How do I know what chuck my drill has?
Check your drill’s user manual or spec sheet. Look for one of these clues: (1) If the shank of your bits has grooves, it’s SDS-Plus (10mm) or SDS-Max (18mm). (2) If the shank is smooth and round, your drill has a standard three-jaw chuck. (3) If your drill is a Festool, it likely uses Centrotec. (4) When in doubt, measure the shank of a bit that fits your drill.
Do I need brand-matched bits?
Not necessarily, but branded bits are engineered to match your tool’s performance. A Makita bit in a Makita drill will perform better than a generic alternative. However, any properly sized bit with the correct shank type (SDS-Plus, standard chuck, etc.) will physically fit and function. The difference is durability and precision.
Next Steps: Choose Your Guide
Use the topic and brand sections above to find the specific compatibility information you need. Each guide includes detailed technical specs, compatibility matrices, and recommended products with Amazon UK affiliate links.
If you have questions about a drill or bit not listed here, check the manufacturer’s spec sheet—they’ll confirm the chuck type and compatible shank designs.