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Best quality HSS M42(Co8%) straight shank twist drill bits for metal stainless steel drilling

Short Description:

1. We are the factory ,so we can supply all size diameters and best quality HSS M42 twist drill bits.

2. HSS M42 twist drill bits,the angle of the bifurcated tip is 118 and 135 degrees, making drilling operations more convenient and efficient.

3. DIN338 standard high speed steel M42 Cobalt straight shank twist dirll bits can drill all metal ,such as stainless steel, iron, aluminium, steel and so on. Notice pls increase in coolant when you drill is hot for increase life.

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Product Description

HSS twist drill bit M42(8%Co) is the best drill bits in the word. It’s Rockwell hardness HRC65-67 degrees and must drilling metal <40 degrees, which is harder than M35 twist drill bits, more wear-resistant, smoother chip removal and more efficient.
The larger the diameter, the slower the required speed, generally suggestion 100-800R/MIN.For stainless steel, steel plate, cast iron, aluminum alloy drilling.
Notice: Don’t used to drill concrete, tile, wall, stone and other materials drilling. HSS twist drill bits are Used for 650W hand drill, table drill, milling machine.Lithium-ion drill has less power and is suitable for punching materials with low hardness. Punching more than 2mm add coolant to continue punching, is to extend the life of the drill bit.

Material	HSSM42, HSSM35, HSSM2(6542), HSS4341, HSS4241
Process	fully ground, edge ground/half ground, roll forged, milled
Standard	DIN338, DIN340, DIN1897, DIN1869
Split Point	118°and 135° tip both available
Stamping	laser marking and (letter) stamping.
Shank	Straight shank(Tri-Flats shank,Hex shank,Round shank,Morse taper shank)
Available Packing	single sleeve packing, sandwich packing, blister packing, square plastic box packing( with hanger or without hanger), Bosch plastic box packing, flat plastic box packing, 5/10 PVC bag packing, paper bag,
Surface Color	black flute & golden shank, black flute & white shank, bright finished, black oxide,Tin-coated, amber(coffee) finished.
Diameter Size	0.5-20mm. 1/16"-1", A-Z, 1# - 90#
Total Length	2.5-140mm
Features	1.HSS m42 drill bits are more expensive than other drill bits, but if you regularly drill through metal, they are a good investment since they tend to last longer. 2.No center punch is needed—the aggressive 135° Quick-Cut points are self-centering and penetrate quickly with less pressure. Will not "walk" or "wander". 3.Precision ground point, flutes, body, clearance and drill diameter for the ultimate in accuracy and performance.

Product Details

We have DIN338 standard all size HSS M42 twist drill bits.

118° and 135° split points

The 118° point angle is mainly used for softer materials such as mild steel and cast iron.
The 135° split point is used for cutting hard steel, especially for deep holes that are more than 4 times the diameter of the drill bit. Using the 135° split point, cutting harder materials produces thicker chips, minimizing work hardening of the cavity.

Spiral fluted shank

Fully ground body construction. High flow spiral design for the fastest removal speed and for thick material

Straight shank

Straight shank for standard chuck,
less "walking" or "wandering."
The end of the shank is chamfered
to allow an easy and firm grip.
Special SST heat treatment of bronze
and surface.

HSS Twist Drill Bits RPM

Suggestions: Bigger diameters, slower RPM speed.

Twist Drill Bits Diameters(mm)	RPM(R/Min)	Application
1mm-2mm	3000-1800(r/min)
2mm-3mm	1800-1400(r/min)
3mm-4mm	1400-1000(r/min)
4mm-5mm	1000-800(r/min)
5mm-6mm	800-700(r/min)
6mm-7mm	700-600(r/min)
7mm-8mm	600-500(r/min)
8mm-9mm	500-400(r/min)
9mm-10mm	400-350(r/min)
10mm-11mm	350-300(r/min)
11mm-12mm	300-280(r/min)
12mm-13mm	280-250(r/min)
14mm	220(r/min)
15mm	200(r/min)

Product Application

Material	Suitable for drill holes
Material	Stainless Steel	Cast Plain	Plain Carbon Steel	Bronze	Brass	Copper	Aluminium	Plastics	glass, tile floors, wall
HSS4241	×	√	×	√	√	√	not good	√	×
HSS6542/M2	not good	√	√	√	√	√	√	√	×
HSS Co/M35	√	√	√	√	√	√	√	√	×
HSS Co/M42	√	√	√	√	√	√	√	√	×