► Alpha | Reduced Shank Drills

High Capacity Drilling with Standard Chuck Compatibility Handling large-diameter drilling without changing equipment, Alpha onsite reduced shank drills allow tradies to achieve bigger hole sizes while maintaining compatibility with standard drill chucks across steel, aluminium & jobsite materials. Oversized drill bits typically require specialised machines or larger chucks, slowing workflow...

High Capacity Drilling with Standard Chuck Compatibility

Handling large-diameter drilling without changing equipment, Alpha onsite reduced shank drills allow tradies to achieve bigger hole sizes while maintaining compatibility with standard drill chucks across steel, aluminium & jobsite materials. Oversized drill bits typically require specialised machines or larger chucks, slowing workflow & limiting flexibility on-site. Reduced shank drill bits eliminate this issue by combining a smaller shank with a larger cutting diameter, enabling efficient drilling with better control, reduced setup time & consistent hole accuracy.

On fast-paced Australian job sites & within workshop environments, adapting to different hole sizes without changing tooling plays a key role in maintaining efficiency & keeping work moving. Industrial Shed supplies Alpha onsite reduced shank drills with dependable stock availability, rapid dispatch & consistent nationwide supply, ensuring tradies can complete larger drilling tasks without delays. Improve drilling performance with Drill Accessories, support cutting efficiency using Cutting Tools & Blades & maintain accurate hole positioning using Measuring & Layout Tools before drilling begins.

Engineered for high-capacity drilling across demanding applications, Alpha onsite reduced shank drills include a complete range of reduced shank drill bits, large diameter drill bits, silver & deming drill bits & heavy-duty drilling solutions suited to steel, aluminium & multi-material use. Selecting the right drill improves torque transfer, minimises slippage & delivers cleaner, more consistent hole finishes when working with larger diameters. Build confidence in high-capacity drilling setups using Drill Bit Sizes Explained: From Pilot Holes to Large Diameter Drilling, understand torque requirements with Corded vs Cordless Drills: What Actually Handles Heavy Loads & extend performance using Tool Maintenance Guide: Extending Drill Bit Life Under Load.

Maximising drilling performance requires the right supporting tools. Ensure correct fastening outcomes using Fasteners & Fixings, reduce heat & extend tool life with Lubrication & Cleaning Gear, maintain accuracy using Precision Engineering Tools & support fabrication environments with Machining & Fabrication Tools.

Designed for Trade, Workshop & Industry

Built for environments where drilling capacity, compatibility & accuracy directly impact job outcomes, Alpha onsite reduced shank drills are used across multiple trades.

  • Fabricators drilling large diameter holes in steel components

  • Automotive technicians enlarging holes for fittings & assemblies

  • Builders handling on-site drilling without specialised equipment

  • Engineers requiring controlled large-hole drilling

  • Maintenance teams performing upgrades & modifications

Shop Alpha Reduced Shank Drills by Category

Reduced Shank Drill Bits for Steel

► Enables large diameter drilling with standard chucks
► Maintains cutting performance under load
► Suitable for fabrication & structural work

Reduced Shank Drill Bits for Aluminium & Soft Materials

► Clean hole finishes without distortion
► Reduced grabbing during drilling
► Ideal for workshop & repair environments

Multi-Material Reduced Shank Drills

► Suitable for steel, aluminium & plastics
► Reduces tool changes across tasks
► Works effectively with Fasteners & Fixings

Heavy Duty Reduced Shank Drills

► Maintains stability during high-load drilling
 ► Designed for repeated heavy use
 ► Extend tool life using Lubrication & Cleaning Gear

When drilling exceeds standard capacity or requires alternative cutting approaches, integrate Hole Saws or expand capability with Metal Cutting & Grinding Tools.

Why Tradies Choose Alpha Onsite Reduced Shank Drills

Drilling larger holes efficiently without changing equipment directly improves workflow speed & job flexibility.

► Allows large diameter drilling with standard drill chucks
► Reduces need for specialised equipment
 ► Maintains consistent hole sizing across larger diameters
 ► Improves efficiency across on-site drilling tasks
 ► Durable construction supports repeated heavy use
► Designed for consistent performance in trade environments

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  • Alpha (10.32mm) Reduced Shank Drill Bit Single Pack
    Alpha - (10.32mm) Reduced Shank Drill Bit Single Pack | 9LI1332R
    Alpha - (10.32mm) Reduced Shank Drill Bit Single Pack | 9LI1332R The Alpha Gold Series Imperial Jobber Drill Bit (9LI1332R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features...
    $13.81
    $15.35
    $13.81
  • Alpha 13mm Reduced Shank Drill Bit Single Pack - Gold Series
    Alpha - 13mm Reduced Shank Drill Bit Single Pack - Gold Series | 9LM130R
    Alpha - 13mm Reduced Shank Drill Bit Single Pack - Gold Series | 9LM130R The Alpha Gold Series Jobber Drill Bit (9LM130R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ►...
    $19.73
    $21.93
    $19.73
  • Alpha 14.5mm Reduced Shank Drill Bit Single PackALPHA 14.5mm Reduced Shank Drill Bit Single Pack
    Alpha - 14.5mm Reduced Shank Drill Bit Single Pack | 9LM145R
    Alpha - 14.5mm Reduced Shank Drill Bit Single Pack | 9LM145R The Alpha Gold Series Jobber Drill Bit (9LM145R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features Fully...
    $34.42
    $38.27
    $34.42
  • Alpha 14mm Reduced Shank Drill Bit Single Pack with 3/8"
    Alpha - 14mm Reduced Shank Drill Bit Single Pack with 3/8" | 9LM140R38
    Alpha - 14mm Reduced Shank Drill Bit Single Pack with 3/8" | 9LM140R38 The Alpha Gold Series Jobber Drill Bit (9LM140R38) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key...
    $30.96
    $34.42
    $30.96
  • Alpha 14mm Reduced Shank Drill Bit Single Pack with 1/2"ALPHA 14mm Reduced Shank Drill Bit Single Pack with 1/2in Shank
    Alpha - 14mm Reduced Shank Drill Bit Single Pack with 1/2" | 9LM140R12
    Alpha - 14mm Reduced Shank Drill Bit Single Pack with 1/2" | 9LM140R12 The Alpha Gold Series Jobber Drill Bit (9LM140R12) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key...
    $30.96
    $34.42
    $30.96
  • Alpha 15.5mm Reduced Shank Drill Bit Single PackALPHA 15.5mm Reduced Shank Drill Bit Single Pack
    Alpha - 15.5mm Reduced Shank Drill Bit Single Pack | 9LM155R
    Alpha - 15.5mm Reduced Shank Drill Bit Single Pack | 9LM155R The Alpha Gold Series Jobber Drill Bit (9LM155R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features Fully...
    $37.35
    $41.52
    $37.35
  • Alpha (23.81mm) Reduced Shank Drill Bit Single Pack
    Alpha - (23.81mm) Reduced Shank Drill Bit Single Pack | 9LI1516R
    Alpha - (23.81mm) Reduced Shank Drill Bit Single Pack | 9LI1516R The Alpha Gold Series Imperial Jobber Drill Bit (9LI1516R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features...
    $61.62
    $68.51
    $61.62
  • Alpha (11.91mm) Reduced Shank Drill Bit Single Pack
    Alpha - (11.91mm) Reduced Shank Drill Bit Single Pack | 9LI1532R
    Alpha - (11.91mm) Reduced Shank Drill Bit Single Pack | 9LI1532R The Alpha Gold Series Imperial Jobber Drill Bit (9LI1532R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features...
    $19.34
    $21.49
    $19.34
  • Alpha 15mm Reduced Shank Drill Bit Single PackALPHA 15mm Reduced Shank Drill Bit Single Pack
    Alpha - 15mm Reduced Shank Drill Bit Single Pack | 9LM150R
    Alpha - 15mm Reduced Shank Drill Bit Single Pack | 9LM150R The Alpha Gold Series Jobber Drill Bit (9LM150R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features Fully...
    $36.83
    $40.94
    $36.83
  • Alpha 16.5mm Reduced Shank Bit Metal Drilling
    Alpha - 16.5mm Reduced Shank Bit Metal Drilling | 9LM165R
    Alpha - 16.5mm Reduced Shank Bit Metal Drilling | 9LM165R The Alpha Gold Series Jobber Drill Bit (9LM165R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features Fully ground...
    $37.99
    $42.24
    $37.99
  • Alpha 17.5mm Reduced Shank Drill Bit Single PackALPHA 17.5mm Reduced Shank Drill Bit Single Pack
    Alpha - 17.5mm Reduced Shank Drill Bit Single Pack | 9LM175R
    Alpha - 17.5mm Reduced Shank Drill Bit Single Pack | 9LM175R The Alpha Gold Series Jobber Drill Bit (9LM175R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features Fully...
    $40.38
    $44.88
    $40.38
  • Alpha (13.49mm) Reduced Shank Drill Bit Single Pack
    Alpha - (13.49mm) Reduced Shank Drill Bit Single Pack | 9LI1732R
    Alpha - (13.49mm) Reduced Shank Drill Bit Single Pack | 9LI1732R The Alpha Gold Series Imperial Jobber Drill Bit (9LI1732R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features...
    $27.61
    $30.69
    $27.61
  • Alpha 17mm Reduced Shank Drill Bit - Single PackAlpha - 17mm Reduced Shank Drill Bit - Single Pack | 9LM170R
    Alpha - 17mm Reduced Shank Drill Bit - Single Pack | 9LM170R
    Alpha - 17mm Reduced Shank Drill Bit - Single Pack | 9LM170R The Alpha Gold Series Jobber Drill Bit (9LM170R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features...
    $39.21
    $43.59
    $39.21
  • Alpha 18.5mm Reduced Shank Drill Bit Single PackALPHA 18.5mm Reduced Shank Drill Bit Single Pack
    Alpha - 18.5mm Reduced Shank Drill Bit Single Pack | 9LM185R
    Alpha - 18.5mm Reduced Shank Drill Bit Single Pack | 9LM185R The Alpha Gold Series Jobber Drill Bit (9LM185R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features Fully...
    $45.77
    $50.88
    $45.77
  • Alpha 18mm Reduced Shank Drill Bit Single PackALPHA 18mm Reduced Shank Drill Bit Single Pack
    Alpha - 18mm Reduced Shank Drill Bit Single Pack | 9LM180R
    Alpha - 18mm Reduced Shank Drill Bit Single Pack | 9LM180R The Alpha Gold Series Jobber Drill Bit (9LM180R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features Fully...
    $43.03
    $47.84
    $43.03
  • Alpha 19.5mm Reduced Shank Drill Bit Single PackALPHA 19.5mm Reduced Shank Drill Bit Single Pack
    Alpha - 19.5mm Reduced Shank Drill Bit Single Pack | 9LM195R
    Alpha - 19.5mm Reduced Shank Drill Bit Single Pack | 9LM195R The Alpha Gold Series Jobber Drill Bit (9LM195R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features Fully...
    $48.81
    $54.26
    $48.81
  • Alpha (15.08mm) Reduced Shank Drill Bit Single Pack
    Alpha - (15.08mm) Reduced Shank Drill Bit Single Pack | 9LI1932R
    Alpha - (15.08mm) Reduced Shank Drill Bit Single Pack | 9LI1932R The Alpha Gold Series Imperial Jobber Drill Bit (9LI1932R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features...
    $34.47
    $38.32
    $34.47
  • Alpha 19mm Reduced Shank Drill Bit Single PackALPHA 19mm Reduced Shank Drill Bit Single Pack
    Alpha - 19mm Reduced Shank Drill Bit Single Pack | 9LM190R
    Alpha - 19mm Reduced Shank Drill Bit Single Pack | 9LM190R The Alpha Gold Series Jobber Drill Bit (9LM190R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features Fully...
    $46.30
    $51.47
    $46.30
  • Alpha 1" (25.40mm) Reduced Shank Drill Bit Single Pack
    Alpha - 1" (25.40mm) Reduced Shank Drill Bit Single Pack | 9LI1R
    Alpha - 1" (25.40mm) Reduced Shank Drill Bit Single Pack | 9LI1R The Alpha Gold Series Imperial Jobber Drill Bit (9LI1R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key...
    $66.97
    $74.45
    $66.97
  • Alpha 20.5mm Reduced Shank Drill Bit Single PackALPHA 20.5mm Reduced Shank Drill Bit Single Pack
    Alpha - 20.5mm Reduced Shank Drill Bit Single Pack | 9LM205R
    Alpha - 20.5mm Reduced Shank Drill Bit Single Pack | 9LM205R The Alpha Gold Series Jobber Drill Bit (9LM205R) is engineered for serious trade use. Made for tradies, fabricators, and toolmakers who need cutting tools that perform shift after shift. ► Key Features Fully...
    $53.13
    $59.06
    $53.13

Built for Real Trade Applications

Automotive & Mechanical

Used for enlarging holes, modifying components & preparing fittings where larger diameters are required.

Construction & Site Work

Handles on-site drilling where equipment limitations require flexible drilling solutions.

Engineering & Fabrication

Supports controlled large-hole drilling across fabricated components.

Maintenance & Industrial

Performs upgrades & modifications where larger fasteners or fittings are needed.

How to Choose the Right Alpha Onsite Reduced Shank Drills

  • Match drill size to required hole diameter
  • Select heavy duty drills for steel applications
  • Use multi-material drills for flexible job requirements
  • Reduce speed for larger diameters to maintain control
  • Ensure drill motor capacity matches load requirements
  • Apply lubrication to reduce heat & extend tool life

Keep your setup organised with Tool Storage to ensure tools stay accessible & protected between jobs.

Trade Tip

Reduce speed when drilling larger diameters — slower speeds improve control, reduce heat & prevent tool overload.

Best Selling Alpha Onsite Reduced Shank Drills

  • Reduced shank drill bits for steel
  • Multi-material reduced shank drills
  • Heavy duty reduced shank drills
  • Large diameter drill bits

Why Buy Alpha Onsite Reduced Shank from Industrial Shed

✔ Reliable supply ready for immediate dispatch
✔ Bulk ordering support for workshops & contractors
✔ Fast Australia-wide delivery
✔ Consistent availability across large diameter drilling ranges
✔ Competitive trade pricing
✔ Australian-owned supplier supporting real jobsite needs

High Capacity Drilling Without Changing Your Setup

When larger hole sizes, flexibility & control matter, Alpha onsite reduced shank drills deliver high-capacity drilling using standard equipment. Built for fabrication, mechanical & site applications, they reduce setup changes, improve efficiency & keep work moving. Order now with Same Day Dispatch & keep your gear performing with Warranty & Parts Support — because downtime isn’t an option on the job.

Frequently Asked Questions

They allow large diameter drilling using standard chucks, removing the need for specialised equipment while maintaining flexibility on-site.

Worn chuck jaws, poor tightening or excessive torque under load can reduce grip when drilling larger diameters.

Use lower speeds, steady pressure & ensure the drill has enough power to handle the load without stalling or grabbing.

Use reduced shank drills for solid material drilling & accurate sizing, while hole saws are better suited for thinner materials or oversized diameters.

Yes — using large diameter bits with underpowered drills can overload the motor, leading to overheating or reduced performance.

Start with a pilot hole where required, maintain alignment & allow the drill to cut progressively to prevent wandering or uneven sizing.

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