Dapra's Toroid Line includes three high-performance inserts, including our RHINO-CARB™ line, to maximize the versatility of our Toroid cutting tools:
Match the insert R value to the designation on your cutter body.
‡ Fits 1-1/4" diameter and above only.
|Cutting Edge||Edge Strength||Tool Pressure||Heat Creation|
|"T" inserts have a strong, negative reinforced cutting edge for steels, irons and hard milling.|
|"N" inserts (round and octagonal only) are more positive than the "T" edge, but stronger than "D." The "N" should be your go-to geometry for most steels, cast irons and 400-series stainless applications.|
|"D" inserts have a high-positive cutting edge for stainless steels, high-temperature alloys and gummy materials.|
Dapra's RHINO-CARB™ high-performance inserts are designed for very aggressive metal cutting and long tool life.
Important: These thicker pressed inserts may cause your cutter to cut a slightly larger diameter than with ground inserts. Always measure tool diameter before use.
Round inserts have a strong cutting edge, making them an excellent choice for many button cutter applications, including:
Follow these links to view the Button Inserts that are available for each R/IC value:
(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:
Follow the link below to view available Square Inserts:
8-sided geometry is excellent for general face milling. 45° lead angle provides increased feed capacity for:
Each of the 8 usable edges comes with an integral wiper flat for outstanding surface finishes (RHINO-CARB only).
* R4 Octagonal available in RHINO-CARB style only.
|Shock & Wear Resistance||Uncoated (Base Grade)||with Coating||Description||Specifications|
|DMK30||Moderate wear resistance/high shock resistance. Recommended for interrupted or unstable steel, most stainless steel, hightemperature alloys and cast iron applications.||ANSI C1-C2, ISO K25-K40, M25-M35|
|DMK30-HP||High-performance medium-temperature grade. Optimum performance and wear resistance in most soft steels, soft stainless steels and cast irons.|
|DMK30-TCI||High-performance medium- to high-temperature grade. Outstanding shock and wear resistance in steels, irons and stainless steels. Best suited for materials < 44 Rc.|
|DMK30-GLH||Premium high-temperature coating. Best resistance to heat for high-shock applications. Excellent for tough stainless steels, high-temperature alloys and many tool steels.|
Shock and Wear
|DMK25†||Micro-grain carbide providing higher wear resistance and good shock resistance for applications in tough stainless steels, high-temperature alloys, irons and many tool steels.||ANSI C2-C3, ISO K15-K30, M15-M30|
|DMK25-HP||High-performance medium-temperature grade. Optimum performance and wear resistance in most soft steels, soft stainless steels and cast irons.|
|DMK25-GLH||Premium high-temperature coating. Outstanding performance and wear resistance in high-heat applications involving tough stainless steels, hightemperature alloys and many tool steels.|
Shock and Wear
|DMP25||High wear resistance/moderate shock resistance. Recommended for most steel and many ductile iron applications.||ANSI C5-C6, ISO P25-P40|
|DMP25-HP||High-performance medium-temperature grade. Optimum performance and wear resistance in most soft steels and cast irons.|
|DMP25-TCI||High-performance medium- to high-temperature grade. Outstanding wear resistance in steels and ductile. Best suited for materials < 44 Rc.|
|DMP25-GLH||Premium high-temperature grade. Unbeatable performance and wear resistance in high-heat applications such as higher speed machining in steels (< 44 Rc) and ductile irons.|
|DMK15||Highest wear resistance with reduced shock absorption capabilities. Micro-grain carbide provides excellent edge strength. Suitable for all materials under stable conditions. Optimum cast iron substrate.||ANSI C2-C3, ISO K15-K25, M15-M25|
|DMK15-HP||High-performance medium-temperature grade. Optimum performance and wear resistance in most soft steels, soft stainless steels and cast irons.|
|DMK15-TCI||High-performance medium- to high-temperature grade. Great for higher-speed gray iron applications and lighter cuts in steels <52 Rc or ductile iron.|
|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.|
The older "3" coating has been replaced by the new "TCI" grade. "3" is available upon request, but will typically have a 1-2 week delivery time.
The older "7" coating has been replaced by the new "GLH" grade. "7" is available upon request, but will typically have a 1-2 week delivery time.
DMK30-GLH is a good first choice for most applications. Additional coatings available on request. Contact Dapra for details.
† DMK25 substrate is available for RHINO-CARB D and N geometries only.
Dapra Toroid products are made in the USA.