MIYANAGA
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M18 thread type.
High-speed and high-precision drilling is possible with a minimal force.

CHARACTERISTICS

  • M18 thread type.
  • Circumferential cutting, in which cutting area is very small, permits boring large holes with low-powered machines.
  • No need of pilot holes for positioning by using center pin. An inner spring provides easy removal of chips.

APPLICATIONS

  • For drilling in steel, shape steel, stainless steel, and cast iron up to 35mm (MB350) or 50mm (MB500) in thickness.
  • Best for drilling work in shipbuilding, bridge building, framework building, and steel structure building.

SPECIFICATIONS

Cutter size: MB500: ø18mm to 80mm (Max. drilling depth: 50mm)
MB350: ø14mm to 35mm (Max. drilling depth: 35mm)
Number of tips: Cutters of ø14mm to 39mm --- 6pcs.
Cutters of ø40mm to 64mm --- 8pcs.
Cutters of ø65mm to 80mm --- 10pcs.
Tip width: Cutter of ø 14mm --- 3.2mm
Cutter of ø 14.5mm --- 3.4mm
Cutter of ø 15mm --- 3.7mm
Cutters of ø16mm to 80mm --- 3.9mm
Applicable electric drill: Magnetic drill presses, upright drilling machines, radial drilling machines, lathes, and milling machines.
Size A B
MB350 14mm to 25mm 67mm 13mm
MB350 25.5mm to 35mm 63mm 17mm
MB500 18mm to 25mm 82mm  
MB500 25.5mm or larger 78mm  



◆Click here for the guideline for cutting conditions of Metal borers.