Hard-alloy crowns D=59 - 171 mm

Hard-alloy crowns are intended for rotary core drilling "dry" / with washing / with airflush. Geomash offers to delivery cutting heads for drilling of low-abrasive grounds of SM-5, SM-6 and mikrocutting self-sharpening drill crowns SA-5, SA-6 for drilling of abrasive half-hard grounds. Diameters of the delivered drill hard-alloy crowns of d = 59-171 mm.

Crowns SM-5 are intended for drilling low-abrasive monolithic and lowcrumbling grounds of the V-VI categories on drilling capacity (dolomite, limestones, clay and sandy shists, etc.).

Crowns SM-6 are intended for drilling of low-abrasive monolithic and crumbling grounds of the VI-VII categories on drilling capacity (dolomite, limestones, serpentinit, peridotites, etc.).

Crowns SM-9 are intended for rotary and rotary-shock core drilling in even and interbedded low-abrasive monolithic and crumbling grounds of the V-VII, partially the VIII categories of drilling capacity.

Crowns of SA-5 and SA-6 types are intended for drilling of mainly abrasive monolithic and interbedded grounds of the VI-VIII, partially the IX categories on drilling capacity (sandstones, diorites, gabbro, porfirit, quartz limestones, etc.).
Name Outside diameter, mm Inside diameter, mm
Drill hard-alloy crown SM-5 D=59 59 44 Order
Drill hard-alloy crown SM-5 D=76 76 59 Order
Drill hard-alloy crown SM-5 D=93 93 75 Order
Drill hard-alloy crown SM-5 D=112 112 94 Order
Drill hard-alloy crown SM-5 D=132 132 114 Order
Drill hard-alloy crown SM-5 D=151 151 133 Order
Drill hard-alloy crown SM-6 D=59 59 42 Order
Drill hard-alloy crown SM-6 D=76 76 58 Order
Drill hard-alloy crown SM-6 D=93 93 78 Order
Drill hard-alloy crown SM-6 D=112 112 92 Order

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