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Ball Nose Modular Heads

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Ball Nose End Mill Screw-On Modular Heads

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 W/M8 THREAD
40835
GWR-12-MOD-C W/M8 THREAD
0.500" 0.500"/12mm 1.050" M8 In Stock
UOM : EA
GWR-12-MOD-C-M6
40835-6
GWR-12-MOD-C-M6
0.500" 12mm 1.050" M6 In Stock
UOM : EA
GWR-16-MOD-C
40840C
GWR-16-MOD-C
0.625 16mm 1.110" M8 In Stock
UOM : EA
GWR-20-MOD-C
40855
GWR-20-MOD-C
0.750" 20mm 1.280" M10 In Stock
UOM : EA
GWR-25-MOD-C
40865
GWR-25-MOD-C
1.000" 25mm 1.650" M12 In Stock
UOM : EA
GWR-32-MOD-C
40875
GWR-32-MOD-C
1.250" 32mm 1.780" M16 In Stock
UOM : EA
GWR-12-MOD-C W/M8 THREAD
40835
GWR-12-MOD-C W/M8 THREAD
  • 0.500"
  • 0.500"/12mm
  • 1.050"
  • M8
GWR-12-MOD-C-M6
40835-6
GWR-12-MOD-C-M6
  • 0.500"
  • 12mm
  • 1.050"
  • M6
GWR-16-MOD-C
40840C
GWR-16-MOD-C
  • 0.625
  • 16mm
  • 1.110"
  • M8
GWR-20-MOD-C
40855
GWR-20-MOD-C
  • 0.750"
  • 20mm
  • 1.280"
  • M10
GWR-25-MOD-C
40865
GWR-25-MOD-C
  • 1.000"
  • 25mm
  • 1.650"
  • M12
GWR-32-MOD-C
40875
GWR-32-MOD-C
  • 1.250"
  • 32mm
  • 1.780"
  • M16