Dapra’s Toroid Line now includes four high-performance inserts (Button, High-Feed, Square, Octagonal) to maximize the versatility of our Toroid cutting tools:

Match the insert R value to the designation on your cutter body. Reference the "Insert" column in our Cutter Body ordering information charts to match available inserts to a specific cutter.
• Stocked standard
o Available upon request

Precision-ground round inserts have a strong cutting edge, making them an excellent choice for many applications, including:
Click here for technical help on optimum feeds for button inserts.
| "R" Value | Insert | IC | Thickness | Radius | Uncoated | Coated | |||
|---|---|---|---|---|---|---|---|---|---|
| DMK30 DMP25 DMK15 |
DMP253 DMK153 |
DMK30-HP DMP25-HP DMK15-HP |
DMK307 DMP257 DMK157 |
DMK30-GLH DMP25-GLH DMK15-GLH |
|||||
| R3 | RDCH-32-D | .375" | .125" | .187" | • | • | • | • | • |
| R3 | RDCH-32-T | .375" | .125" | .187" | • | • | • | • | • |
| R4 | RDCH-43-D | .500" | .187" | .250" | • | • | • | • | • |
| R4 | RDCH-43-T | .500" | .187" | .250" | • | • | • | • | • |
| R5 | RXCH-53-D | .625" | .187" | .312" | • | • | • | • | • |
| R5 | RXCH-53-T | .625" | .187" | .312" | • | • | • | • | • |
| R6 | RXCH-63-D | .750" | .187" | .375" | • | • | • | • | • |
| R6 | RXCH-63-T | .750" | .187" | .375" | • | • | • | • | • |
(R4 is 1-1/4" dia. and above only)
Ultra-aggressive geometry takes advantage of chip thinning to allow feed rates up to 6x faster than normal! Use high-feed inserts for:
Click here for help on feed compensation for high-feed inserts.
| "R" Value | Insert | IC | Thickness | Max. DOC | Program Radius** | Coated | |||
|---|---|---|---|---|---|---|---|---|---|
| DMK303 DMP253 |
DMK30-HP DMP30-HP |
DMK307 DMP257 |
DMK30-GLH DMP25-GLH |
||||||
| R3 | HFDCH-32-T | .375" | .125" | .020" | .165" | • | • | • | • |
| R4 | HFDCH-43-T | .500" | .187" | .040" | .220" | • | • | • | • |
** High-feed inserts require a specific program radius in order to provide correct material removal and avoid undercutting.
HFDCH-43 inserts are suitable for 1-1/4" diameters and above only.
High-Feed Insert Loading Instructions
Incorrect loading of the high-feed insert will cause it to perform like a chamfer mill, incapable of the extreme feeds for which the high-feed is designed. Take care to load the insert like the "correct" picture at left to avoid potential insert and cutter breakage.
(1-1/4" dia. and above only)
Your Toroid cutter can now be used for the most common applications involving 90° milling. Utilize the more economical 4-sided inserts for:
| "R" Value | Insert | IC | Thickness | Corner Radius | Coated | |||
|---|---|---|---|---|---|---|---|---|
| DMK303 DMP253 DMK153 |
DMK30-HP DMP25-HP DMK15-HP |
DMK307 DMP257 DMK157 |
DMK30-GLH DMP25-GLH DMK15-GLH |
|||||
| R4 | SXEH-432-T | .500" | .200" | .031" | • | • | • | • |
| R4 | SXEH-432-D | .500" | .200" | .031" | • | • | • | • |
SXEH inserts are suitable for 1-1/4" diameters and above only.
8-sided geometry is excellent for general face milling. 45° lead angle provides increased feed capacity for:
Click here for information regarding 45° lead angle compensation for octagonal inserts.
| "R" Value | Insert | IC | Thickness | Radius | Uncoated | Coated | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| DMK30 DMP25 DMK15 |
DMK303 | DMP253 DMK153 |
DMK30-HP DMP25-HP DMK15-HP |
DMK307 DMP257 DMK157 |
DMK30-GLH DMP25-GLH DMK15-GLH |
|||||
| R5 | OXCH-534-D | .625" | .187" | .062" | • | • | • | • | • | • |
| R5 | OXCH-534-T | .625" | .187" | .062" | • | o | • | • | • | • |
| R6 | OXCH-634-D | .750" | .187" | .062" | • | o | • | • | • | • |
| R6 | OXCH-634-T | .750" | .187" | .051" | • | o | • | • | • | • |
| Shock & Wear Resistance | Uncoated (Base Grade) | with Coating | Description | Specifications |
|---|---|---|---|---|
| TOUGHEST Shock Resistance |
DMK30 | Moderate wear resistance/high shock resistance. Recommended for interrupted or unstable steel, most 300 series stainless steel, high- temperature alloys and cast iron applications. | ANSI C1-C2, ISO K25-K40, M25-M35 | |
| DMK303 | PVD TiCN coating. Excellent wear resistance for low-to-medium operating temperatures. | |||
| DMK30-HP | High-performance medium-temperature grade. Optimum performance and wear resistance in most soft steels, soft stainless steels and cast irons. | |||
| DMK307 | PVD AlTiN coating. For higher-temp. applications including tougher stainless steels, high-temperature alloys, high-speed machining and heat-treated materials. | |||
| DMK30-GLH | Premium high-temperature grade. Unbeatable performance and wear resistance in high-heat applications such as harder steels, tough stainless steels and high- temperature alloys. | |||
| MEDIUM Shock and Wear |
DMP25 | High wear resistance/moderate shock resistance, recommended for most steel and 400 series stainless steel applications. | ANSI C5-C6, ISO P25-P40 | |
| DMP253 | PVD TiCN coating. Excellent wear resistance for low-to-medium operating temperatures. | |||
| DMP25-HP | High-performance medium-temperature grade. Optimum performance and wear resistance in most soft steels, soft stainless steels and cast irons. | |||
| DMP257 | PVD AlTiN coating. For higher-temperature applications including high-speed machining and heat-treated materials. | |||
| DMP25-GLH | Premium high-temperature grade. Unbeatable performance and wear resistance in high-heat applications such as harder steels, tough stainless steels and high-temperature alloys. | |||
| HARDEST Wear Resistance |
DMK15 | Highest wear resistance with reduced shock absorption capabilities. Micro- grain carbide provides excellent edge strength for abrasive applications in nonferrous materials. Suitable for castings, aluminum and smoother cuts in tough stainless steels, high-temperature alloys and hardened steel. | ANSI C2-C3, ISO K15-K25, M15-M25 | |
| DMK153 | PVD TiCN coating. Excellent wear resistance for low-to-medium operating temperatures. Good resistance to built-up edge for aluminum machining. | |||
| DMK15-HP | High-performance medium-temperature grade. Optimum performance and wear resistance in most soft steels, soft stainless steels and cast irons. | |||
| DMK157 | PVD AlTiN coating. Appropriate for higher-temperature applications such as high-velocity cast iron machining, tough stainless steels, high-temperature alloys and hardened steel. | |||
| DMK15-GLH | Premium high-temperature grade. Unbeatable performance and wear resistance in high-heat applications such as harder steels, tough stainless steels and high- temperature alloys. |
DMP25-HP is a good first choice for most applications. Additional coatings available on request. Contact Dapra for details.
Dapra Toroid products are made in the USA.