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CoroDrill 861

Excellent chip evacuation

ACM (Advanced Chip Management) flute geometry ensures sufficient flute space along the whole length of the tool and encourages small and manageable chips.

Unique surface treatment provides a very smooth surface in the flutes to decrease torque.

Accurate deep holes

Accurate deep holes to depths of up to 30 × drill diameter, without pecking

Greater productivity

High speeds and feeds allow greater productivity to reduce cost per hole

View More Features
  • Specially designed point geometry helps to reduce thrust forces
  • Consistent edge preparation protects the cutting edge from premature chipping and flaking
  • Double offset margin patented geometry offers greater stability to the drilling operation
  • Internal coolant holes deliver coolant directly to the tip of the drill, even at deep drilling depths
  • Can be reconditioned to tools original specification for extended tool life

Find your tool and buy

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  • Achievable hole tolerance H8−H9
  • Drilling depths: 12−30 × drill diameter
  • Clamp with high precision chucks only
  • A wide range of workpiece materials
  • Conventional drilling, cross holes, angled faces
  • Automotive: crankshafts, engine blocks, cylinder heads
  • Steel
  • Stainless steel
  • Cast iron
  • Non-ferrous metals

Product variants

861-GP

  • Recommended to use on drill lengths above 12 × D
  • Shallow point angle, 150°
    • Initial contact with the chisel of the deep hole drill
    • Better point location—improves centering
    • Less wear—prevents secondary chisel damage
    • Increased accuracy
  • Body tolerance p7
    • Creates a bushing effect without interference fit
    • Prevents outer corner damage

861-GM

  • For drilling deep holes to depths up to 30 × D diameter without pecking
  • Covering a wide range of materials
  • Proven application method for cross holes and angled face drilling
  • Includes pilot drill
  • Depth and diameter capability:
    • 12 × D, Ø 3.0–20.0 mm (0.118–0.787 inch)
    • 15 × D, Ø 3.0–12.0 mm (0.118–0.472 inch)
    • 20 × D, Ø 3.0–12.0 mm (0.118–0.472 inch)
    • 30 × D, Ø 3.0–8.0 mm (0.132–0.315 inch)
  • Hole tolerance IT8 – IT9
  • Grade GC34
  • Internal coolant

CoroChuck<sup>®</sup> 930

Use CoroChuck® 930 with your CoroDrill® 861 to maintain efficient production through quick and easy tool setups and changes.

Highlights

Solid Round Tools catalogue

Download and share your digital version of the Solid Round Tools catalogue.

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Find the right tool

Watch the video to learn more about products that are offered within versatile, optimized, and customized ranges.

Learn more about reconditioning your older tools

Recondition your round tool up to 3 times for major cost savings with our reconditioning service.

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