Losning Counter Sink
The Losning Counter Sink is a 90-degree HSS countersink used for deburring drilled holes and creating the conical seat needed for countersunk (flat-head) screws and rivets. Losning is a well-known European brand for hole-making and finishing tooling, and SAN Tools stocks a wide range of these countersinks from its Dubai Al Quoz, Sharjah and Ajman branches for supply across the UAE.
Key features
- 90-degree included angle — matches the standard head angle of countersunk screws, bolts and rivets used across metalwork and fabrication.
- High-speed steel (HSS) construction — holds a sharp edge on steel, aluminium and other common workshop metals.
- M35 cobalt HSS options — available in tougher M35 grade for extended tool life in harder or more abrasive materials.
- TiN-coated variants — the M35 TiN-coated range adds a titanium nitride coating for reduced friction and longer service life in higher-volume work.
- Wide size range — supplied from small diameters up to 60mm, covering fastener sizes from light-gauge sheet metal through heavy structural work.
Applications
- Deburring the edges of drilled holes before assembly or painting
- Cutting a countersink for flat-head screws, bolts and rivets
- Chamfering hole edges on steel, aluminium and cast components
- Use on pillar drills, radial drills, milling machines and by hand with a tap wrench
Specifications
| Attribute | Detail |
|---|---|
| Brand | Losning |
| Type | Countersink |
| Angle | 90 degrees |
| Material | HSS (standard and M35 cobalt); M35 TiN-coated option available |
| Sizes / variants available | Standard HSS: 6.3, 8.3, 10.4, 12.4, 16.5, 20.5, 25, 31mm. M35 HSS: 6.3, 8.3, 10.4, 12.4, 16.5, 20.5, 25, 31mm. M35 TiN-coated HSS: 4.5, 6.3, 8.3, 10.4, 12.4, 14, 16.5, 18, 20.5, 23, 25, 30, 35, 40, 45, 50, 60mm |
How to choose
- Pick the diameter that matches the head diameter of the screw, bolt or rivet you are countersinking — check the fastener's datasheet rather than guessing.
- Choose an M35 cobalt or TiN-coated version for harder materials, stainless steel or high-volume production where tool life matters.
- Standard HSS is usually sufficient for mild steel, aluminium and general fabrication work.
- For hand use, pair the countersink with a tap wrench or drill chuck rated for the shank size.
Frequently asked questions
What is a 90-degree countersink used for?
It cuts a conical recess around a drilled hole so a flat-head (countersunk) screw, bolt or rivet sits flush with, or below, the surface, and it removes the sharp burr left after drilling.
What is the difference between the standard, M35 and M35 TiN-coated versions?
Standard HSS suits general steel and aluminium work. M35 is a cobalt-alloyed HSS with better heat resistance for harder materials, and the M35 TiN-coated version adds a hard titanium nitride coating for reduced friction and longer tool life in demanding or repetitive use.
Is this available for delivery in the UAE?
Available from our Dubai, Sharjah and Ajman branches with UAE-wide delivery; request a quote or WhatsApp +971 52 132 7742.
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