MAXTEC SDS Plus Wood Auger Drill Bit - Lead Screw Tip and Spur Cutting Edge

MAXTEC SDS Plus Wood Auger Drill Bit

The MAXTEC SDS Plus Wood Auger Drill Bit is built for deep, clean hole boring in structural softwood, hardwood, engineered timber, and composite board using an SDS Plus rotary hammer drill. The lead screw tip pulls the bit into the material under its own rotational force, so the operator guides rather than pushes. The spur scores the hole circumference cleanly before the flute engages, eliminating the splintering that flat bits produce. Available from 6mm to 32mm, the range covers cable penetrations through joists, lock-fitting, dowelling, and large through-holes in beams.

The key practical advantage is the SDS Plus shank. On a site where a rotary hammer is already in use for masonry, switching to rotary-only mode and fitting this bit takes seconds. No second drill required.

Why Choose the MAXTEC SDS Plus Wood Auger Drill Bit

• Lead screw self-feeding action: the threaded tip draws the bit forward as it rotates. On deep bores through 200mm or more of structural timber, the reduction in operator effort compared to a flat bit is significant.

• Spur and cutting edge: the spur scribes the circumference first, then the cutters remove the material within it. The result is a clean, accurate bore with no tearout at entry or exit.

• Wide helical flute: clears chips continuously on deep bores, preventing the binding and stalling that narrower flutes cause in dense hardwood.

• Corrosion-resistant finish: bright and black oxide finish protects the bit in damp, treated, or exposed timber conditions where bare steel corrodes quickly.

• Full range from one supplier: 6mm to 32mm in two lengths covers every structural timber drilling task from cable runs to large structural through-holes.

What's Included

One MAXTEC SDS Plus Wood Auger Drill Bit in the specified diameter and length. 

 Specifications

Compatibility

! How to Select the Right Length

The MAXTEC SDS Plus Wood Auger Drill Bit is available in three overall lengths: 235mm, 450mm (or 460mm on 18mm diameter), and 600mm. Before ordering, always check the working length, not the overall length.

The working length is the cutting section of the bit, measured from the lead screw tip to the shank collar. This is the maximum depth the bit can drill before the collar meets the timber surface and stops further progress. The remaining length is the SDS Plus shank, which sits inside the drill chuck and never enters the material.

Always select a working length at least 50mm greater than your required drilling depth. This margin keeps the flute clear of the bore at full depth so chips can continue to evacuate during the cut.

Example: if you need to drill through a 150mm structural beam, the 235mm variant leaves only 10mm of margin, which is insufficient. Select the 450mm or 600mm variant depending on your required depth.

Not all diameters are available in every length. Check the size reference table above to confirm which length variants are stocked for your required diameter before ordering. If you are unsure, contact the CMT Group sales team.

Size Options and Working Length

Who Is This For?

Site carpenters, joiners, electricians, and plumbers working with structural timber on UK construction sites. Anyone already using an SDS Plus rotary hammer for masonry who needs to drill timber without switching to a second tool.

Typical Applications

• Cable and conduit penetrations through floor joists and wall studs
• Lock-fitting in softwood and hardwood doors
• Dowel hole boring for timber frame connections
• Large through-holes in structural beams and posts for bolt fixings
• Pipe penetrations through sole plates, head plates, and stud walls
• Service runs through engineered timber I-joists and LVL beams
• Through-holes in hardwood sleepers and landscape timber

How to Use

1. Select the correct diameter. For conduit, choose at least 5mm larger than the conduit outer diameter.
2. Insert the SDS Plus shank and confirm it is fully locked in the chuck.
3. Set the drill to rotary-only mode. Confirm hammer action is disengaged before the bit touches timber.
4. Apply light forward pressure to start. Once the lead screw engages, the bit self-feeds. Guide, do not push.
5. Withdraw the bit every 50mm to 75mm on deep bores to clear chips and reduce heat.
6. On through-hole drilling, place a scrap timber backing board against the exit face to eliminate breakout splintering.

Safety and Maintenance

• Wear EN166 safety goggles throughout. Wood chips are a direct eye hazard, particularly overhead.
• Secure the workpiece before starting. The self-feeding lead screw generates a strong rotational pull on unsecured timber.
• Never engage hammer mode with this bit in the chuck. It destroys the lead screw tip and spur immediately.
• Clear resin and chips from the flute after every use. Hardened deposits reduce chip clearance on the next bore.
• Inspect the lead screw tip and spur after each use. A blunt or damaged lead screw forces manual pressure and defeats the auger design. A chipped spur produces a ragged entry hole.
• Store bits separated to prevent spur-to-spur contact. Spur tips chip easily against other tooling.

Frequently Asked Questions

Q: Why use a wood auger bit instead of a flat bit or spade bit?

 A: A flat bit relies entirely on operator forward pressure, produces significant splintering, and leaves a rough bore. The MAXTEC SDS Plus Wood Auger Drill Bit self-feeds via the lead screw, scores the circumference cleanly with the spur, and evacuates chips through the wide flute. The result is a faster cut, less effort, and a far cleaner hole.

Q: Can I use this bit with the hammer action engaged?

 A: No. Hammer mode must be fully disengaged before this bit contacts timber. The lead screw and spur are precision-machined for rotary cutting only. One stroke of percussion will strip the lead screw thread and chip the spur.

Q: What is the difference between the 235mm and 600mm variants?

 A: The 235mm variant has a 160mm working length, covering most standard structural timber tasks up to 150mm depth. The 600mm variant provides up to 530mm of working length for deep through-holes in large beams or multiple-joist drilling from a single entry point. Always select a working length at least 50mm greater than your required drilling depth.

Q: Does it work on hardwood as well as softwood?

 A: Yes. Reduce speed slightly on dense hardwood such as oak or iroko, and withdraw more frequently to clear the heavier chips that hardwood produces.

Q: Will it work on engineered timber such as LVL or I-joists?

 A: Yes. The lead screw maintains directional stability through bonded layers and the spur handles variable grain direction cleanly. Reduce speed at the entry and exit points of I-joist webs to avoid tearout at the face veneers.

Q: Is there a risk of the bit binding in deep bores?

 A: The risk is low with correct technique. Withdraw the bit every 50mm to 75mm on bores deeper than 100mm. If the bit stalls, briefly reverse the drill to loosen the chip pack before withdrawing. Never force the drill forward against a stalled bit.

Q: Why order from CMT Group?

 A: CMT Group has supplied UK construction sites since 2010, operating a fleet of over 100 FORS Silver accredited vehicles covering 90% of the UK mainland. The MAXTEC SDS Plus Wood Auger Drill Bit is available for next working day delivery on orders placed by 7pm online. VIP dedicated delivery dispatches within 30 minutes for urgent site requirements. Trade accounts, volume pricing, and EDGE portal access available.