Toroid Button, High-Feed, Square & Octagonal Inserts

Dapra's Toroid Line includes four high-performance inserts, including our new RHINO-CARB™ line, to maximize the versatility of our Toroid cutting tools:

Button, high-feed, square and octagonal inserts

Match the insert R value to the designation on your cutter body.

‡ Fits 1-1/4" diameter and above only.

RHINO-CARB Inserts

Button Inserts

1 – Button Inserts – R3, R4, R5, R6

Round inserts have a strong cutting edge, making them an excellent choice for many applications, including:

  • Mold cavity and core roughing
  • Roughing of complex part contours
  • Helical interpolation (larger diameter hole making)
  • Pocketing
  • Semifinishing
  • Face milling

Follow these links to view the Button Inserts that are available for each R/IC value:

Click here for technical help on optimum feeds for button inserts.


High-Feed Inserts

2 – High-Feed Inserts – R3, R4

(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:

  • Mold cavity and core roughing
  • Roughing of complex part contours
  • Pocketing
  • Helical interpolation
  • Face milling (roughing only)

Follow these links to view the High-Feed Inserts that are available for each R/IC value:

Click here for technical help on feed compensation for high-feed inserts.


High-feed insert loading


** High-feed inserts require a specific program radius in order to provide correct material removal and avoid undercutting.


Square Inserts

3 – Square Inserts – R4

(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:

  • Profiling
  • Step milling
  • Face milling
  • Slotting
  • Helical interpolation (cored holes only)
  • Plunge milling

Follow these links to view the Square Inserts that are available for each R/IC value:

Octagonal Inserts

4 – Octagonal Inserts – R4*, R5, R6

8-sided geometry is excellent for general face milling. 45° lead angle provides increased feed capacity for:

  • Face milling
  • Profiling
  • Helical interpolation
  • Chamfering

Each of the 8 usable edges comes with an integral wiper flat for outstanding surface finishes.

Click here for information regarding 45° lead angle compensation for octagonal inserts.

* R4 Octagonal available in RHINO-CARB style only.


Toroid Insert Grade Selection
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.