A 13mm keyed chuck for SDS and SDS Plus machines, supplied complete with chuck key and SDS adapter, conforming to DIN6349.
- Capacity: 13mm, suitable for rotary and impact drilling applications
- Compatibility: For use with SDS and SDS Plus machines
- Mount: Half-inch x 20 UNF thread
- Includes: Chuck key and SDS adapter supplied as standard
- Standard: DIN6349
SDS Keyed Chuck - 13mm Capacity with Adapter
A 13mm keyed chuck for SDS and SDS Plus machines, supplied complete with chuck key and SDS adapter, conforming to DIN6349.
- Capacity: 13mm, suitable for rotary and impact drilling applications
- Compatibility: For use with SDS and SDS Plus machines
- Mount: Half-inch x 20 UNF thread
- Includes: Chuck key and SDS adapter supplied as standard
- Standard: DIN6349
- Buy 6 for £12.44 £10.37 each and save 13%
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| BULK DISCOUNT | 6 | 12 |
|---|---|---|
| Price | £10.37 £12.44 | £9.22 £11.06 |
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Log in to access trade discountsSDS Keyed Chuck
The SDS Keyed Chuck converts an SDS or SDS Plus drill into a platform that accepts standard round-shank drill bits up to 13mm. It mounts to the SDS spindle via the included half-inch x 20 UNF adapter and is tightened using the supplied chuck key, giving a positive, mechanically secured grip on the bit shank. Conforming to DIN6349, it is suited to both rotary and impact drilling applications. Everything needed to fit and use the chuck is included in the box: the chuck itself, the chuck key, and the SDS adapter.
Why Choose the SDS Keyed Chuck?
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Complete kit supplied: The chuck key and SDS adapter are included. No separate purchases are needed to get the chuck working on your machine. This matters on site where missing accessories cause delays.
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Keyed tightening for maximum grip: A chuck key provides a mechanical tightening advantage over hand tightening alone. For heavy rotary and impact drilling where maximum clamping rigidity is the priority, a keyed chuck delivers a more secure and consistent grip on the bit shank than a keyless alternative.
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13mm capacity: Covers the full range of standard round-shank bits used in general construction and trades work, from small-diameter HSS bits up to 13mm wood and masonry bits.
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SDS and SDS Plus compatible: The included adapter fits both SDS and SDS Plus machine spindles, making this chuck compatible with the two most widely used SDS formats on UK construction sites.
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Half-inch x 20 UNF thread: The standard thread specification ensuring compatibility with the included adapter and with replacement adapters if needed.
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DIN6349 conformance: DIN6349 is the German industrial standard for drill chucks, specifying dimensional and performance requirements. Conformance to this standard confirms the chuck meets recognised engineering specifications for its class.
What is in the Box?
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1 x SDS Keyed Chuck, 13mm capacity, half-inch x 20 UNF thread
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1 x Chuck key
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1 x SDS adapter
Specifications
| Specification | Detail |
|---|---|
| Product Name | SDS Keyed Chuck - 13mm Capacity with Adapter |
| Product Code | CHUCK12 |
| Capacity | 13mm |
| Mount | 1/2" x 20 UNF |
| Application | SDS and SDS Plus Machines |
| Drilling Type | Rotary and Impact |
| Standard | DIN 6349 |
| Includes | Chuck Key and SDS Adapter |
Compatibility
| Compatible With | Status |
|---|---|
| SDS Machines | ✓ Compatible |
| SDS Plus Machines | ✓ Compatible |
| Rotary Drilling | ✓ Compatible |
| Impact Drilling | ✓ Compatible |
| Round-Shank Drill Bits (Up to 13mm) | ✓ Compatible |
| HSS Twist Bits | ✓ Compatible |
| Wood Twist Bits | ✓ Compatible |
| Round-Shank Masonry Bits | ✓ Compatible |
| SDS-Shank Bits | ✗ Not Recommended |
| Bits Over 13mm Shank Diameter | ✗ Not Recommended |
| SDS Max Machines | ✗ Not Recommended |
Who Is This For?
This chuck is for contractors, groundworkers, electricians, plumbers, and general site operatives who use an SDS or SDS Plus drill as their primary machine and need to run standard round-shank tooling on the same drill. It is particularly suited to operatives who prioritise maximum clamping rigidity over speed of bit change, and who use the chuck for sustained rotary or impact drilling rather than frequent tool changes throughout the shift.
Typical Applications
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Heavy rotary drilling with large-diameter HSS or wood bits on an SDS machine
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Impact drilling with standard round-shank bits where SDS-format equivalents are not available
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General construction drilling where a single SDS machine is used for multiple bit types across the working day
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Any application requiring a positive, mechanically tightened grip on a round-shank bit up to 13mm
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Trade and site use where carrying a second drill is not practical
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Applications where maximum clamping security is more important than speed of bit change
How to Use
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Ensure the SDS drill is switched off and the battery is removed or the machine is unplugged before fitting any chuck or changing any tooling.
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Fit the included SDS adapter to the SDS spindle of your drill following the adapter instructions.
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Thread the SDS Keyed Chuck onto the half-inch x 20 UNF adapter. Hand tighten until secure.
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Insert the chuck key into one of the key holes on the chuck body and tighten firmly to fully seat the chuck on the adapter.
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To open the chuck jaws, insert the chuck key and rotate anticlockwise until the jaws open wider than the bit shank you intend to use.
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Insert the drill bit shank fully into the chuck, centring it between the jaws.
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Rotate the chuck key clockwise to close and tighten the jaws firmly onto the bit shank. Tighten using each key hole in turn to ensure even clamping pressure.
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Refit the battery or reconnect power and proceed with the task.
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To remove a bit, insert the chuck key and rotate anticlockwise to release the jaws.
Safety
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Always remove power from the drill before fitting, adjusting, or removing the chuck or any drill bit.
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Do not insert bits with a shank diameter exceeding 13mm. Exceeding the rated capacity places stress on the jaws and the mount.
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Inspect the chuck before each use for visible damage to the body, jaws, or mount thread.
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Ensure the chuck is tightened firmly using the chuck key before operating the drill. Never operate with a hand-tightened chuck only.
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Keep the chuck key away from the chuck body before switching the drill on. A chuck key left in the chuck is a serious ejection hazard.
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Wear appropriate eye protection during all drilling operations.
Maintenance
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Remove accumulated swarf and dust from the jaw area and key holes after use. Debris build-up reduces tightening effectiveness and accelerates wear.
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Store the chuck key with the chuck. A missing chuck key makes the chuck unusable.
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Inspect the half-inch x 20 UNF thread on the chuck mount regularly. Damaged or cross-threaded mounts must not be used.
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Apply a small amount of light machine oil to the jaw mechanism periodically to maintain smooth operation, particularly in dusty or damp site environments.
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Store in a dry location away from moisture to prevent corrosion on the jaw mechanism and chuck key.
Frequently Asked Questions
Q: What is the difference between the SDS Keyed Chuck and the CMT SDS Keyless Chuck?
A: The SDS Keyed Chuck is tightened using a chuck key, which provides a mechanical tightening advantage and a more rigidly secured grip on the bit shank. This makes it better suited to heavy rotary and impact drilling where maximum clamping force is the priority. The SDS Keyless Chuck is tightened by hand, making bit changes faster but with less mechanical tightening force. The keyed option also includes the SDS adapter in the box, whereas the keyless chuck requires the adapter to be purchased separately.
Q: Does this chuck come with everything I need to fit it to my SDS drill?
A: Yes. The SDS Keyed Chuck is supplied complete with a chuck key and an SDS adapter. No additional purchases are required to fit and use the chuck on an SDS or SDS Plus machine.
Q: What does DIN6349 mean and why does it matter?
A: DIN6349 is a German industrial standard that specifies dimensional and performance requirements for drill chucks. Conformance to this standard confirms the chuck meets recognised engineering specifications for its class, giving confidence that the product is manufactured to consistent and verifiable tolerances rather than to an unspecified internal standard.
Q: Can I use this chuck for impact drilling as well as rotary drilling?
A: Yes. The SDS Keyed Chuck is rated for both rotary and impact drilling applications. The keyed tightening mechanism provides the clamping rigidity needed to maintain bit grip under the additional stress of impact operation.
Q: Will this chuck fit my SDS Plus drill as well as a standard SDS drill?
A: Yes. The included SDS adapter is compatible with both SDS and SDS Plus machine spindles. These are the two most widely used SDS formats on UK construction sites and both are covered by this product.
Q: What size drill bits can I use with this chuck?
A: The chuck accepts any round-shank bit up to 13mm in shank diameter. This covers HSS twist bits, wood twist bits, spade bits, and round-shank masonry bits across the full range used in general construction and trades work. Do not attempt to fit bits with shanks exceeding 13mm.
Q: What happens if I lose the chuck key?
A: Without the chuck key the jaws cannot be tightened or loosened correctly. Store the chuck key with the chuck at all times. Replacement chuck keys are available from CMT Group.
Q: Why buy the SDS Keyed Chuck from CMT Group?
A: CMT Group has supplied construction and trade professionals across the UK since 2010. The SDS Keyed Chuck is held in stock for next working day delivery on orders placed online by 7pm. Our EDGE procurement portal gives trade account holders agreed contract pricing, full order visibility, and live delivery tracking from order through to arrival on site. Place your order online at cmt.co.uk.
