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Modular Heads for Ball Nose Single-Sided Insert Platform

Screw-on Ball Nose end mill modular heads fit industry-standard cutting systems.

Note – All Dapra Ball Nose cutter bodies and modular heads accept BOTH inch inserts and metric inserts (interchangeable).

  • Compatible with ISO-standard modular systems
  • Greater effective reach than solid end mills
  • Close-tolerance mounting minimizes runout
  • Standard inch wrench flats – no special metric wrenches needed
  • Modular extensions are also available: carbide core, solid carbide and heavy metal
Ball Nose screw-on modular heads
SBN Modular Head dimensions

** M8 modular extensions not available. Use ISO standard bars.

"C" denotes thru-tool coolant.

Modular extensions

Looking for inserts for these cutters?


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Item Dia Insert Size Effective Length Mounting Thread Price Inventory
GWR-12-MOD-C-M6
40835-6
 GWR-12-MOD-C-M6 		0.500" 0.500" / 12mm 1.050" M6
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In Stock
UOM : EA
GWR-16-MOD-C
40840C
 GWR-16-MOD-C 		0.625 0.625" / 16mm 1.110" M8
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In Stock
UOM : EA
GWR-20-MOD-C
40855
 GWR-20-MOD-C 		0.750" 0.750" / 20mm 1.280" M10
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In Stock
UOM : EA
GWR-25-MOD-C
40865
 GWR-25-MOD-C 		1.000" 1.000" / 25mm 1.650" M12
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In Stock
UOM : EA
GWR-32-MOD-C
40875
 GWR-32-MOD-C 		1.250" 1.250" / 30,32mm 1.780" M16
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In Stock
UOM : EA
GWR-12-MOD-C-M6
40835-6
GWR-12-MOD-C-M6
  • 0.500"
  • 0.500" / 12mm
  • 1.050"
  • M6
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EA
GWR-16-MOD-C
40840C
GWR-16-MOD-C
  • 0.625
  • 0.625" / 16mm
  • 1.110"
  • M8
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EA
GWR-20-MOD-C
40855
GWR-20-MOD-C
  • 0.750"
  • 0.750" / 20mm
  • 1.280"
  • M10
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EA
GWR-25-MOD-C
40865
GWR-25-MOD-C
  • 1.000"
  • 1.000" / 25mm
  • 1.650"
  • M12
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EA
GWR-32-MOD-C
40875
GWR-32-MOD-C
  • 1.250"
  • 1.250" / 30,32mm
  • 1.780"
  • M16
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EA