R-Countersinks
Solid-carbide countersink for machining steel and stainless steel, for countersinking and hole chamfering. Available uncoated or OK Premium coated, Ø5–14 mm in fine sub-millimetre increments (20 catalogue items). Ships in 2 coating options. Rated for ISO P/M material classes.
Engineered for performance
Solid-Carbide Substrate, Uncoated or OK Premium
Ships in 2 coating options — uncoated or OK Premium coated — across all 20 catalogue sizes.
R-Radius Countersinking Geometry
The catalogue's own "R" (radius) countersink profile is available across corner radii from 0.5 to 5 mm, for rounded-profile countersinking and hole chamfering rather than a flat conical angle.
Steel & Stainless Coverage
Rated for ISO P (steel) and M (stainless steel) material groups.
Ø5–14 mm, 50–75 mm Overall Length
Diameters run Ø5–14 mm in fine sub-millimetre increments, with overall lengths from 50 to 75 mm across 20 sizes.
Sizes & part numbers
RCS3A 🔍 Click to zoom No sizes match those filters.
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| ORDER NO. | Ø | CORNER R | SHANK | COATING |
|---|---|---|---|---|
| RCS3-050R | 5 mm | 0.5 | 6 | Uncoated |
| RCS3-075R | 5.5 mm | 0.75 | 6 | Uncoated |
| RCS3-100R | 6 mm | 1 | 6 | Uncoated |
| RCS3-125R | 6.5 mm | 1.25 | 8 | Uncoated |
| RCS3-150R | 7 mm | 1.5 | 8 | Uncoated |
| RCS3-200R | 8 mm | 2 | 8 | Uncoated |
| RCS3-250R | 9 mm | 2.5 | 10 | Uncoated |
| RCS3-300R | 10 mm | 3 | 10 | Uncoated |
| RCS3-400R | 12 mm | 4 | 12 | Uncoated |
| RCS3-500R | 14 mm | 5 | 12 | Uncoated |
| RCS3A050R | 5 mm | 0.5 | 6 | OK Premium |
| RCS3A075R | 5.5 mm | 0.75 | 6 | OK Premium |
| RCS3A100R | 6 mm | 1 | 6 | OK Premium |
| RCS3A125R | 6.5 mm | 1.25 | 8 | OK Premium |
| RCS3A150R | 7 mm | 1.5 | 8 | OK Premium |
| RCS3A200R | 8 mm | 2 | 8 | OK Premium |
| RCS3A250R | 9 mm | 2.5 | 10 | OK Premium |
| RCS3A300R | 10 mm | 3 | 10 | OK Premium |
| RCS3A400R | 12 mm | 4 | 12 | OK Premium |
| RCS3A500R | 14 mm | 5 | 12 | OK Premium |
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