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Spiral drills (HM)

For jewellery materials which are difficult to machine, such as pearl and corals, you need a drilling expert: these twist drills of finest grained hard metal have two cutting edges and two flutes, and have a substantially longer service life than traditional tool-steel or HSS twist drills on pealrs and corals.

Twist drill Fig. 203 "HM"
Material: Finest grain carbide
Execution: 4 grooves
Range of app.: corals, pearls
Shank: 2,35 mm dia.
Rec. speed: 5.000 - 9.000 r.p.m. (freehand drilling)
Rec. speed: 8.000 - 14.000 r.p.m. (upright drilling)
Advantage: durable, solid construction
  • singly
    nameshapehead Øshaft Øunititem No.
    twist drill203 HM0.70 mm2.35 mm1 piece568507
    twist drill203 HM0.80 mm2.35 mm1 piece568508
    twist drill203 HM0.90 mm2.35 mm1 piece568509
    twist drill203 HM1.00 mm2.35 mm1 piece568510
    twist drill203 HM1.10 mm2.35 mm1 piece568511
    twist drill203 HM1.20 mm2.35 mm1 piece568512
    twist drill203 HM1.30 mm2.35 mm1 piece568513
    twist drill203 HM1.40 mm2.35 mm1 piece568514
    twist drill203 HM1.50 mm2.35 mm1 piece568515
    twist drill203 HM1.60 mm2.35 mm1 piece568516
    twist drill203 HM1.80 mm2.35 mm1 piece568518
    twist drill203 HM2.10 mm2.35 mm1 piece568521
    twist drill203 HM2.30 mm2.35 mm1 piece568523
  • Assortment
    nameversionshapehead Øcontentsitem No.
    twist drillassorted203 HM0.70-1.20 mm6 pieces568500
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