Timco hex shank speed auger bit with four flute cutter and screw point for fast, clean drilling in timber. High grade carbon steel construction with 1/4 inch quick release hex shank. Available in 16mm, 20mm and 25mm diameters.
Available options and pricing for Timco Hex Shank Speed Auger Bit 16–25mm x 159mm, with quantity selectors and a running total
Size
SKU
Price
QTY
Total
16 x 159mm
SPA16
£3.78£4.54
—
20 x 159mm
SPA20
£4.67£5.60
—
25 x 159mm
SPA25
£6.42£7.70
—
The Timco Hex Shank Speed Auger Bit is built for one thing: drilling clean, fast holes through timber without faff. Whether you are running cable, installing fixings, or boring out for pipe work, this bit gets the job done at pace. The four flute cutter design is what sets a speed auger apart from a standard auger — more cutting edges, faster chip ejection, less heat build-up, and a noticeably cleaner bore than you get from older single-flute designs. The screw point pulls the bit into the timber on contact, so you are not fighting the tool to get started.
High grade carbon steel gives the bit enough toughness for sustained use in softwood and hardwood alike. These are not the kind of bits you baby — they are meant to be used hard on site, switched between jobs, and still deliver a decent hole at the end of the day. The 1/4 inch hex shank with quick release means you can swap bits in seconds on any compatible drill or impact driver without rummaging for a chuck key. On a busy first fix day, that matters more than it sounds.
Where the Hex Shank Speed Auger Bit Gets Used
First fix joinery is the obvious home for this bit. Electricians boring through floor joists, plumbers running pipe through stud walls, joiners dropping holes for barrel bolts and hardware — this is that kind of bit. The 159mm overall length gives you enough reach to work through standard stud depth without needing an extension bar for most common jobs.
Choosing the Right Diameter
Three sizes cover most common site requirements. The 16mm is well suited to cable runs and small fixings. The 20mm handles pipe and conduit work comfortably. The 25mm is the go-to for barrel bolts, larger cable bundles, and anything where you need a bit of clearance around whatever is passing through. All three run at 159mm length, so you get consistent feel across the range regardless of which size you reach for.
Available individually at a sensible trade price, with bulk pricing available if you need to stock the van properly.
Pro Tip: Run the screw point into the timber before you apply full drill speed, letting it self-centre first, as this prevents the bit from skating across grain on awkward entry angles.
Speed auger bits like these are everyday tools for electricians and plumbers on first fix, where you need to drill multiple holes through joists and studs in quick succession. They work well in construction timber, engineered joists, and general structural softwood. Joiners reach for them when fitting barrel bolts, hinges with cylindrical housings, or any hardware that calls for a clean, accurately sized through-hole. The quick release hex shank also makes them practical for use with cordless impact drivers where speed and bit changes matter.
Best For
Cable runs through floor joists
Pipe and conduit holes in stud walls
Barrel bolt and hardware installation
First fix electrical and plumbing work
General timber boring on site
Compatible With
1/4 inch hex chuck drills
Cordless impact drivers with quick release
Standard drill drivers with hex adaptor
Drill stands with hex collet
Key Specifications
Available diameters: 16mm, 20mm, 25mm
Overall length: 159mm
Shank: 1/4 inch hex quick release
Cutter: four flute design
Point: self-feeding screw point
Material: high grade carbon steel
Not suitable for: Not designed for use in masonry, metal, or composite sheet materials. These bits are for timber use only and will dull quickly if used on anything harder.
Fit the hex shank into a compatible drill or impact driver and ensure the quick release mechanism has engaged fully before you start. Mark your hole position and let the screw point do the initial work at low speed to get the bit seated correctly. Once it has pulled in, increase speed and apply steady forward pressure to let the flutes clear the waste efficiently.
On deeper holes or when drilling through multiple layers, withdraw the bit periodically to clear chips from the flutes. This keeps the cut clean and reduces the chance of the bit binding mid-bore, which is the main cause of broken bits and stripped hex shanks on site.
Select the correct diameter for the job before you start — measure twice, drill once
Insert the hex shank fully into the chuck or quick release collar until it clicks into place
Mark the hole position clearly on the timber surface
Start at low speed and let the screw point pull the bit into the timber to self-centre
Increase drill speed once the bit has seated and apply steady forward pressure
Withdraw the bit periodically on deeper holes to clear chips from the flutes
Reduce speed as the bit breaks through the far face to avoid splitting the timber
Can I use these speed auger bits with an impact driver?
Yes. The 1/4 inch hex quick release shank is directly compatible with standard impact driver chucks. Many tradespeople prefer an impact driver for repetitive boring work as it maintains speed under load better than a standard drill driver.
What is the difference between a speed auger and a standard auger bit?
A speed auger uses multiple flute cutters rather than a single spiral, which means chips are ejected faster, the bit runs cooler, and you get a cleaner hole in less time. The trade-off is that speed augers are less suited to very deep, slow bores where a traditional auger's spiral would pull chips out over a longer distance.
Are these bits suitable for hardwood as well as softwood?
They will work in hardwood, but expect slower progress and more wear compared to softwood. High grade carbon steel is capable in both, though for sustained hardwood drilling you may find HSS or carbide-tipped options give longer bit life. For occasional hardwood use on site, these are perfectly adequate.
Constructed from high grade carbon steel, these speed auger bits offer a practical balance of hardness and durability for general timber boring applications. The four flute cutter geometry increases the number of cutting edges per revolution, improving material removal rate and reducing friction heat at the bore wall. A self-feeding screw point ensures positive engagement with the workpiece on contact. The 1/4 inch hex shank conforms to standard quick release chuck fitment used across most cordless drill and impact driver platforms.
Brand
Timco
Available Sizes
16 x 159mm, 20 x 159mm, 25 x 159mm
Shank Type
1/4 inch hex quick release
Cutter Type
Four flute
Point Type
Screw point
Material
High grade carbon steel
Overall Length
159mm
Application
Timber drilling
Size
16 x 159mm, 20 x 159mm, 25 x 159mm
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