Buy Auger Drill Bit Sets Online in Australia
Auger Drill Bit Selection — Quick Reference (Timber)
Auger drill bits are designed for DEEP hole boring in TIMBER — framing + formwork + sleepers + posts + heavy structural timbers where twist bits clog + spade bits lack depth. Selection by diameter + length + drive type + intended power tool.
| Auger Bit Type | Best For | Common Sizes |
|---|---|---|
| Standard Timber Auger | Framing + general carpentry deep-bore | 6mm – 32mm dia × 200-300mm long |
| Long Reach Auger (450mm+) | Structural + post + formwork deep holes | 10mm – 32mm dia × 450-600mm |
| Ship Auger (Single-Twist) | Heavy timber + sleeper drilling | 10mm – 32mm — extra-deep boring |
| Auger with Screw Pilot Tip | Self-feeding into timber — quick start | Drill press + cordless typical |
| Hex-Shank (1/4" Quick-Change) | Cordless drill quick-change format | Common workshop sizes |
| Square-Drive (Brace Bit) | Traditional brace + bit — manual deep boring | Vintage + restoration work |
| Multi-Auger Set (Common Sizes) | Workshop assortment — 6 to 9 bit set | Mixed sizes 6mm-25mm typical |
Workflow: Auger pulls itself into the work via centre screw tip — operator controls feed + back-out periodically to clear chips. Critical: never overload an auger in tough timber — let the bit cut at its own rate; forcing = broken bit or jammed drill. Use slow speed (200-500 RPM) for control + chip ejection. Companion: drilling, drill accessories, cordless power tools.
Auger Drill Bit Sets
Auger drill bits are designed for deep hole boring in timber — framing, formwork, sleepers, posts and heavy structural timbers where standard twist bits would clog and standard spade bits lack depth. AIMS Industrial stocks auger drill bit sets in standard timber auger configurations for use in cordless drills, drill presses and specialised long-reach auger drills.
Auger Bit Design
The key features of an auger drill bit are the lead screw (which pulls the bit into the timber and centres the hole), the spurs (which score the hole perimeter cleanly before the main cutting edges break through, essential for clean entry and exit holes in visible timber), and the deep spiral flute (which augers timber chips out of the hole continuously, preventing clog-up in deep boring). These features combine to produce clean, consistent holes in green or seasoned timber at depths a standard twist drill cannot reach.
Applications
Auger bits are the tool of choice for electrical and plumbing rough-in in timber frame construction (passing cables and pipes through top and bottom plates), drilling holes for coach screws and large bolts in structural timber connections, creating drainage holes in posts and sleepers, and boring large-diameter holes for door hardware with a swing-brace or right-angle drill drive. Standard brace-shank auger bits work in traditional braces; hex-shank augers work in modern cordless drills.
Set Contents
Auger bit sets typically cover the most common timber boring sizes — 10mm through 25mm — providing the range needed for most construction and joinery applications. For help selecting the right auger bit set for your application, contact our team. AIMS Industrial has been supporting Australian tradespeople since 1988.
People Also Ask — Auger Drill Bit Sets
Q: What's an auger drill bit?
An auger bit is a wood-boring drill bit with a screw-point tip and continuous spiral flute — designed for cutting clean, deep holes in timber. The screw-point pulls the bit through the work without requiring axial pressure; the spiral flute clears chips efficiently. Used for drilling joinery holes, plumbing/electrical pass-throughs in framing, and any deep wood-drilling application. Auger bits are timber-specific — don't use on metal or masonry.
Q: What sizes do auger bits come in?
Common metric sizes: 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 20mm, 25mm, 32mm. Imperial: 1/4", 5/16", 3/8", 7/16", 1/2", 5/8", 3/4", 1". Auger bit sets typically cover 6-25mm or 1/4" to 1" in matched sizes. Lengths: standard 200mm, extended 300-450mm for deep through-drilling in framing timber. Match length to the typical hole depth — long bits give more flex in shorter holes.
Q: Auger bit vs spade bit for wood drilling?
Auger bit: cleaner hole, deeper drilling capability, screw-point self-pulls, better chip clearance. Premium choice for joinery and finish work. Spade (flat) bit: cheaper, faster drilling in some applications, requires more axial pressure, leaves rougher hole. Workshop choice for rough holes in framing where finish doesn't matter. For trade carpentry and joinery, auger bits are the standard. For rough construction drilling, spade bits are common.
Q: Can I sharpen auger bits?
Yes — auger bits sharpen with a small triangular file or specialised auger-bit file. Sharpen the spurs (the outer cutters that score the hole perimeter), the cutting lips, and the screw point. Maintains the original geometry — don't change spur angles or screw point. With moderate care, an auger bit lasts for years of trade use. Replace when the spurs have been filed away or the screw point thread is stripped.
Q: How do I drill clean exit holes with auger bits?
The screw-point design means auger bits tend to chip the exit side of the hole. Two methods to avoid: (1) drill from both sides — drill until the screw-point just breaks through, withdraw, finish from the back side. (2) clamp a sacrificial backer block on the back side — the bit drills through into the backer, preventing chip-out. For visible finish work, both methods are workshop standard. For rough framing where exit appearance doesn't matter, drill straight through.