EASYDRILL HOLEMAKING
Countersinks
EasyDrill M2 HSS 90° countersinks for controlled chamfering, deburring and countersunk screw-seat preparation in workshop and fabrication applications.
Select the countersink by included angle, hole diameter, shank type, workpiece material and machine setup. The current EasyDrill range includes both straight-shank and Weldon-shank 90° countersinks.
How a Countersink Works
A countersink machines a conical feature at the entrance of an existing hole for screw seating, edge breaking or burr removal.
The cutting edge produces a controlled tapered feature around the top of an existing hole.
The current EasyDrill range uses a 90° countersink geometry.
Light countersinking can remove drilling burrs and sharp edges around completed holes.
Countersink diameter increases as the tool feeds deeper into the workpiece.
When to Use a Countersink
Countersinks are used after drilling where the hole entrance needs a controlled chamfer, cleaner edge or recessed screw-seat feature.
Produce a 90° countersunk seat where the fastener geometry requires the matching included angle.
Light engagement removes burrs and sharp edges left after drilling.
Useful where a defined chamfer is required around the entrance of a hole.
Straight Shank or Weldon Shank?
Both EasyDrill countersink styles use M2 HSS and 90° geometry, with the main difference being how the tool is held in the machine.
Straight shanks are suitable for compatible drill chucks, collets and general workshop setups.
Weldon shanks provide a flat for positive side-lock clamping in compatible toolholders.
Match the Countersink to the Hole and Required Chamfer
The tool must be large enough to produce the required countersink diameter while maintaining the required 90° geometry.
Confirm the original hole diameter before selecting the countersink size.
The tool must cover the required finished chamfer or screw-seat diameter.
Match the countersink angle to the fastener or drawing requirement.
Feed depth determines the final countersink diameter.
Adjust Cutting Conditions to the Material
M2 HSS countersinks can be used across common workshop materials when speed, feed and lubrication are selected appropriately.
Use controlled spindle speed and steady feed for a clean countersink.
Use suitable lubricant, lower speed and positive feed.
Keep cutting edges clean and use suitable lubrication where required.
Confirm tool suitability and use appropriate cutting conditions.
Reduce Countersink Chatter
Countersinking can develop chatter if the tool, spindle or workpiece is not sufficiently stable. Correct speed, feed and setup are important for a clean finish.
Minimise unnecessary overhang to improve rigidity.
Movement or vibration can produce an uneven or faceted countersink.
Reduce spindle speed if chatter or excessive heat develops.
A consistent feed helps the cutting edges work rather than rub.
Countersink or Chamfer Mill?
Both tools can produce chamfers, but they are intended for different machines and machining strategies.
Practical for drill presses, conventional machines and general workshop hole finishing.
Better suited to CNC milling where programmed chamfer paths, edge profiling or repeated features are required.
Check the Complete Countersinking Setup
Confirm 90° matches the required feature.
Check the drilled hole diameter.
Confirm the tool covers the required countersink size.
Select straight or Weldon shank for the machine setup.
Adjust speed, feed and lubrication accordingly.
Use controlled speed to reduce heat and chatter.
Keep tool and workpiece securely supported.
Control depth to achieve the required finished diameter.
Practical Countersink Selection
Choose the straight-shank EasyDrill countersink where a compatible chuck or collet is being used.
Choose the Weldon-shank version where positive side-lock clamping is preferred.
Confirm the fastener requires a matching 90° included angle.
Use light controlled engagement to remove burrs without creating an unnecessarily large chamfer.
Reduce speed, shorten overhang and improve workholding rigidity.
Consider a chamfer mill for programmed CNC edge and profile machining.
Browse Countersinks
Explore EasyDrill M2 HSS 90° straight-shank and Weldon-shank countersinks below.
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EasyDrill HSS M2 90° Straight Shank Countersink
Price range: $19.00 through $49.00 exc. GST This product has multiple variants. The options may be chosen on the product page -
EasyDrill HSS M2 90° Weldon Shank Countersink
Price range: $39.00 through $49.00 exc. GST This product has multiple variants. The options may be chosen on the product page