Drilling metal is generally black drill, drill material is generally high speed steel, in general metal materials (alloy steel, non-alloy steel, cast iron, cast steel, non-ferrous metal) drilling, with the use of metalworking drill. However, pay attention to drilling on metal materials, the speed should not be too high, easy to burn the edge of the drill.
Some are now gold-plated with rare hard metal films, made of tools steel and the like, hardened by heat treatment. The tip is ground to an equal Angle and slightly backward to form an acute edge. Drilling does not harden steel, iron, aluminum heat treatment, which tends to stick to the drill bit, drilling needs to be lubricated with soapy water.
Welcome to Behappy Crafts, we are the professional manufacturer of power tool accessories, we are specilized in drill bits, hole saw, cutting discs, etc. We have our own plant to produce different types of the twist drill bits for metal, aluminium, wood working. Our twist drill bits are processed by Roll Forged and Fully Ground, with the different angle. We can do the differnet surface treament, bright finish, black, tin coated, amber finsh etc. Our twist drill bits are fast working and dural to use. Welcome to visit us and start our cooperation.
Description:
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Description
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25pcs Din 338 HSS M35 Cobalt 5% Twist Drill Bits With Good Price
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Material
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HSS 4241/ HSS 4341/ HSS 6542/ HSS M35
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Technical process
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Roll-forged, half ground, fully ground
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Shank
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straight shank
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Drill surface
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Tin-coated/white/black/amber etc
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Tip angle
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118 degree/135 degree with split point
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Size
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Metric:1.5~6.5mm*0.5mm+3.2mm+4.8mm
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Inch:1/16"~1/4" *1/64"
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Package
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Plastic box
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MOQ
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500 sets
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Application
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Metal, steel plate, stainless steel
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Payment terms
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T/T, D/P, L/C, Paypal, Western Union, ect.
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Delivery time
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15~35 days
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