republic of south africa 1/4" Hex Shank Quick Change Step drill High Speed Steel Cobalt Multiple Hole Step Drill Bit Set

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republic of south africaStep Drill Bits

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Product Description

1/4" Hex Shank Quick Change Step drill High Speed Steel Cobalt Multiple Hole Step Drill Bit Set

Step drill is mainly used for drilling thin steel plates within 3mm. One drill bit can be used instead of multiple drill bits. It can process holes of different diameters according to the needs, and can realize the processing of large holes at one time without changing the drill bit and drilling positioning holes.

Material: tungsten carbide / HSS / HSS Co / steel
Coating: No / TIN or as you request
Hardness (HV): 1475~1675
Hardness (HRC): 45/50/55/58/60/65
Surface Treatment: Bright finished, Tin-coated, Cobalt-coated, Black-oxidized
Shank: Round Shank, Three-Side Shank, Hex Shank, Hex Shank With a Step
Flute: HSS Spiral/Straight/Double Flute Step Drill Bits
Application: Aluminum, Iron, Carbon Steel, Stainless steel, Plastic, etcThe product can be used in automobile processing, aerospace, sheet metal processing, electrical installation and maintenance and other industries. At the same time, the product is easy to carry and can be used for high-altitude operations with hand drills and other tools.

size	steps	Length
4-12	5	65
4-12	9	65
4-20	9	75
4-30	14	100
6-38	12	100
6-26.7	8	75
4-39	13	107
6-32	8	75
5-28	7	69
6-30.50	9	80
6-37	12	100
4.8-10.65	5	54
6-25	7	65
6-32	9	76
6-40	16	105

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