Toroid Button, High-Feed, Square & Octagonal Inserts

Dapra’s Toroid Line now includes four high-performance inserts (Button, High-Feed, Square, Octagonal) 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. 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

T-Land Edge and Dished Face Insert Geometries

Button Inserts

1 – Button Inserts – R3, R4, R5, R6

Precision-ground 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

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

Button Inserts, Button Cutters
"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" • • • • •
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
  • Helical interpolation
  • Pocketing
  • Face milling (roughing only)

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

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 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.

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
Square Inserts
"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.


Octagonal Inserts

4 – Octagonal Inserts – 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

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

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 • • • •

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.