Buy Corner Radius End Mills Online in Australia
Corner radius (bull nose) end mills have a flat bottom with a small radius blended into the corner, so they cut a flat floor with a filleted wall-to-floor transition and are less prone to chipping at the corner than a square end mill. AIMS Industrial lists 21 corner radius end mills, all from Sutton Tools, in solid carbide from micro sizes up to 20mm, with corner radii from 0.1 to 6mm, 4, 5 and 6 flute, and regular, long and extra long reach. For help choosing between carbide and HSS tooling see our carbide vs HSS end mill guide and the end mill guide.
What's in the range
| Sutton range | What the range includes |
|---|---|
| AlCrN, 4 flute | E559, E564 and E565 in regular reach, E430 and E431 in long reach, and E437 (6 to 8 flute) in long reach. Metric cutting diameters from 3 to 20mm. E572 is the imperial version, 3/16 to 1 inch cutting diameter. |
| AlNova, 5 and 6 flute | E466 and E467 (5 flute), E470 and E471 (6 flute) in regular reach, and E476 and E477 (5 flute) in extra long reach. Corner radii up to 6mm, cutting diameters from 6 to 20mm. |
| Xceed, 5 flute | E474 and E475, cutting diameters from 6 to 20mm (E474 also lists 2mm), radii 0.5 to 4mm. |
| Helica, 4 flute | E462 and E463 in regular reach. E463 lists radii 0.3 to 3mm in 6 to 20mm diameters. |
| TiSiN, micro and hi-feed | E650 4 flute hi-feed (2 and 3mm, radii 0.3 and 0.5mm) and E598 4 flute hi-feed micro in long reach (1 to 4mm diameter, radii 0.1 to 0.5mm, reach lengths from 4 to 40mm). E581 is a 2 flute micro long reach end mill from 0.2 to 3mm. |
| Roughing | E255 Rougher, corner radius, 10 to 32mm cutting diameter with radii from 2.5 to 6mm. |
Shank style (HA or HB) and reach are shown in each product title, and the size options appear on each product page.
Choosing a corner radius end mill
Match the radius to the print. If the drawing does not call one out, a small radius is usually enough to take the stress off the corner without changing the part geometry much. The radius cannot be larger than the tool's cutting radius, so small diameters are limited to small corner radii. Then choose the reach: regular reach for most work, long or extra long reach where you need to get down into a pocket or past a wall. Flute count follows the job. Fewer flutes leave more room for chips, and more flutes put more cutting edges on the work for finishing in harder material. This range lists 2, 4, 5, 6 and 6 to 8 flute tools.
If you need a true sharp internal corner, use a square end mill instead. For curved 3D surfaces see ball nose end mills.
Always check the data sheet. Confirm the coating, shank, reach and recommended speeds and feeds for your material before you rely on a tool.
Related ranges
See end mills and milling cutters, square end mills, ball nose end mills, corner chamfer end mills and slot drills. Brand: Sutton Tools.
Order from AIMS Industrial
Not sure which diameter, radius or coating suits your job? Call us on (02) 9773 0122, contact our team or request a quote. We have supplied Australian industry since 1988 and can help you match a tool to the material and the machine.
Corner radius end mill FAQs
Is a bull nose end mill the same as a corner radius end mill?
Yes. Both terms describe a flat-bottomed end mill with a radius blended into the corner. Bull nose is the common shop-floor term and corner radius is the more precise one.
What is the difference between a corner radius, ball nose and square end mill?
A corner radius end mill has a flat bottom with a radiused corner. A ball nose end mill has a full radius across the whole bottom and is used for curved 3D surfaces. A square end mill has a sharp corner and is used where the part needs a sharp internal corner.
What corner radii are listed in this range?
Radii run from 0.1mm on the micro tools up to 6mm on the larger AlNova and roughing tools. The options differ by product and diameter, so check the product page for the radii listed for the size you need.
What diameters are available?
Carbide end mills in this range run from 1mm micro sizes up to 20mm, and the E581 micro end mill starts at 0.2mm. The E255 rougher goes up to 32mm. The imperial E572 runs from 3/16 to 1 inch.
Which flute count should I choose?
Fewer flutes give more room for chips, which helps in slotting and softer material. More flutes put more cutting edges on the work, which suits finishing and harder material. This range includes 2, 4, 5, 6 and 6 to 8 flute end mills.
Do you have long reach corner radius end mills?
Yes. E430, E431, E437, E581 and E598 are listed in long reach, and E476 and E477 in extra long reach. The reach length options are on each product page.
Can you help me choose a corner radius end mill?
Yes. Send us the material, the machine and the radius you need, or call (02) 9773 0122, and we will point you to the right Sutton tool.