Annular Cutters
Achieve burr-free finished holes, without predrilling or stepdrilling – Faster and more accurate than twist drilling

Benefits of the CS Unitec Cutter Design:
Precision-ground flutes provide efficient chip clearance, increasing drilling productivity and decreasing cutter breakage.
Double-action tooth geometry cuts, splits and ejects chips more efficiently,
- increasing cutting speed
- reducing tooth load
- minimizing tool wear
- lengthening cutter life
Engineered with a tapered inner wall for smooth, easy slug ejection.
Center hole for pilot pin accurately aligns the cutter, allows for internal lubrication and removes the slug.
Perfect drilling to close tolerances without runout. The result: a burr-free finished hole.
Your Choice of Unibroach® Cutter Materials:
Pilot Pins: How they work...
1. Centering: The Pilot pin accurately centers cutter over area to be drilled.
2. Oiling: During drilling, the pilot pin retracts and allows internal coolant to reach the cutting teeth.
3. Ejecting: When hole is complete, the slug is automatically ejected from the cutter.
High-speed steel for drilling 3x faster than twist drills
- Fully ground HSS annular cutters
- Ideal for heavy-duty use on-site or in the shop
| Tool shank: |
3/4" Weldon 1-1/4" Weldon |
HSS Cutter Sizes
| Cutting depth: | 1" |
| Drilling Ø: |
7/16" - 5-1/8" |
| Cutting depth: | 2" |
| Drilling Ø: |
7/16" - 5-1/8" |
| Cutting depth: | 3" |
| Drilling Ø: |
3/4" - 5-1/8" |
| Cutting depth: | 4" |
| Drilling Ø: |
3/4" - 5-1/8" |
Metric cutters available on request. Unibroach™ Stack Cutters are available in diameters from 7/16" to 1-1/8" in 1", 2" and 3" depths. Drill multiple layers of steel without stopping to remove the center slug.
Get more information and view order numbers for 6-Series HSS Cutters.
TiAlN coating for up to 4x tool life, less friction and more power
- Fully ground HSS annular cutters with TiAlN hard coating
- At 90Rc hardness, ARMOR-PLATED Cutters are the state-of-the-art in hole cutting technology
- Withstand higher working temperatures and prevent cold weld
- Ideal for structural steel and hard metal
| Tool shank: |
3/4" Weldon 1-1/4" Weldon |
ARMOR-PLATED TiAlN Cutter Sizes
| Cutting depth: | 1" |
| Drilling Ø: |
7/16" - 5-1/8" |
| Cutting depth: | 2" |
| Drilling Ø: | 7/16" - 5-1/8" |
| Cutting depth: | 3" |
| Drilling Ø: | 3/4" - 5-1/8" |
Metric and larger-diameter ARMOR-PLATED cutters are available on request.
Get more information and view order numbers for 8-Series ARMOR-PLATED TiAlN Cutters.
Tungsten carbide-tipped for high-speed cutting
- Sintered carbide annular cutters with Tungsten Carbide tips
- Ideal for drilling steel with rust or paint
- Will outlast High-speed Steel cutters
| Tool shank: |
3/4" Weldon 1-1/4" Weldon |
TCT Hornet Tungsten Carbide-tipped Cutter Sizes
| Cutting depth: | 1" (1-3/8" depth for diameters larger than 1-1/2") |
| Drilling Ø: |
1/2" - 2" |
| Cutting depth: | 2-3/8" |
| Drilling Ø: |
1/2" - 5-1/8" |
| Cutting depth: | 3" |
| Drilling Ø: |
3/4" - 5-1/8" |
Metric cutters are available on request.
Get more information and view order numbers for 9-Series TCT Hornet Tungsten Carbide-tipped Cutters.
Carbide-tipped Hole Saws
Cut holes in sheet metal up to 3/8" thick
- Tungsten carbide-tipped cutting edges last longer and can be run at higher feeds and speeds to create holes of exceptional quality and accuracy
- Diameters from 9/16" to 2-1/2"
- 3/8" (12mm) drilling depth; 1" (28mm) effective length
- Designed for use with portable drilling machines
- 1/2" and 3/4" hex shanks
Contact us for more information.
- Unibroach® Cobalt Cutters are made with 5% cobalt to increase resistance to wear
- Excellent results when drilling high-tensile steel and difficult-to-machine materials
- Available with TiAlN coating upon request
- 3/4" shank is standard for cutters up to 3" dia.
- Available for hole sizes up to 5" dia. – click here for sizes and ordering information
- Metric cutters available on request
Unibroach® Large-diameter Hole Cutting
Drill perfect holes up to 5-1/8" diameter without runout
- Standard with 3/4" or 1-1/4" shank diameters
- More cutting teeth to distribute the load evenly
- Increase tool life and achieve faster feed rates
- Use on milling machines, drill presses, CNC and other equipment
- A solid slug has a higher value for scrap metal
- Available in TCT Carbide, HSS, Cobalt and ARMOR-PLATED Unibroach™
Contact us for more information.
Unibroach® Cutter Kits
Kits include one each: 9/16", 11/16", 13/16", 15/16", 1-1/16" (for cutter depth of 1" or 2"), pilot pin and plastic case.
Contact us for more information.