CoroDrill® 861
CoroDrill® 861 provides the high stability essential for drilling deep holes, with high speed and efficiency, up to 30 × D.
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
- 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
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 drillBetter point location—improves centeringLess wear—prevents secondary chisel damageIncreased accuracy
- Body tolerance p7 Creates a bushing effect without interference fitPrevents 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.
Deep hole - Drilling strategy
For maximum performance and productivity, Sandvik Coromant recommend applying a machining strategy when using CoroDrill 861-GM.
Highlights
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Sandvik Coromant US - Mebane, NC
+1-800-Sandvik