01 — Essential Specifications
Choose with confidence
Essential specifications
The facts that matter most when choosing the right product in this family.
02 -- Materials, Applications & Machines
Working compatibility
Materials, applications & machines
Quickly confirm what the tool can cut, the work it is designed to perform, and the equipment it is intended to run on.
Compatible materials
Recommended workpiece materials
- Stainless steel
- Non-ferrous metals
- Steel
Recommended applications
Typical jobs and operations
- steel stainless steel alloys non-ferrous materials
- Holemaking
03 -- Complete Technical Specifications
Technical data
Complete technical specifications
Open only the groups you need to confirm construction, dimensions, and operating requirements.
Construction & identification
Tool typeCountersinks
Tool subtypeThree-Flute Countersinks
Detailed styleHSS · 90°
Manufacturer series799
Series family799
Measurement systemImperial
Tool materialHigh-speed steel
Manufacturer part number799-3/4X90
Dimensions & fit
Size3/4"
Increment1/90 in
Cutting diameter3/4"
Overall length2-13/32
Shank diameter1/2
Pack quantity1
Cutting geometry
Countersink angle90.0°
04 -- Why Choose this series
Series advantage
Why choose the 799 series
799
The three-flute geometry ensures a perfectly balanced cut — reduced chatter + smoother finish = fewer rejected parts.
Features supporting this advantage
- The three-flute geometry ensures a perfectly balanced cut — reduced chatter + smoother finish = fewer rejected parts.
- High-speed steel
05 -- Compatibility & What's Included
06 -- Use Notes & Technical Description
Before you use it
Use notes & technical description
Important fit, operating, and care guidance to review before putting the tool to work.
View the complete technical description
Champion 799-3/4X90 Three-Flute HSS Countersink, 3/4" x 90°
799-3/4X90 is a Champion 799 three-flute HSS countersink with a 90° included angle and 3/4" cutting diameter. The chatter-resistant design is made for countersinking, chamfering and deburring a variety of steels and alloys in portable power drills, drill presses and machine applications.
Key Benefits
- Three-flute HSS design supports smooth, chatter-free countersinking.
- 90° angle matches the selected fastener or finishing requirement.
- 3/4" diameter targets the exact hole size for the job.
- High-speed steel supports repeated work in steel and metal alloys.
- Made for portable drills, drill presses and machine applications.
Applications
- Countersinking and chamfering steel and metal alloys
- Deburring drilled holes before fastening or finishing
- Portable power drills, drill presses and machine tools
- 3/4" diameter holes requiring a 90° countersink angle
Technical Specifications
| Manufacturer part number | 799-3/4X90 |
|---|---|
| Series | Champion 799 |
| Tool type | Three-flute countersink |
| Cutting diameter | 3/4" |
| Countersink angle | 90° |
| Material | High-speed steel |
| Shank diameter | 1/2" |
| Overall length | 2-13/32" |
| Country of origin | Made in USA |
How to Use
Use the 799-3/4X90 in rotary mode with the cutter aligned to the hole. Apply controlled feed pressure and let the flutes cut rather than forcing the tool. Choose the correct speed for the material and clear chips between operations.
Cutting tools may shatter if misused or overloaded. Wear eye protection and follow the tool and machine manufacturer's operating instructions.
How ordering works
A clear process from order to delivery
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1
Order submitted securely
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Secure submission
2
Confirmation sent
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Details confirmed
3
Picking and packing
Our team prepares the correct products and quantities for safe, accurate transportation.
Carefully prepared
4
Tracking provided
As soon as the carrier label is created, the tracking information is sent to you.
Trackable shipment
5
Delivery to your location
Your order travels to the selected address with clear visibility into its progress.
Dependable delivery
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