6PCS HSS Straight Titanium Coated Metal Hole Step Drill Bit Set For Cutting Metal

Short Description:

Features:
1. The ladder of its unique structure, a bit can open a variety of specifications of aperture.
2. Do not need to use center punch, compared with the ordinary twist drill is not easy to be broken.
3. Deburring, chamfering, elliptic hole enlargement, twist drill, the function of them was unable,but it is possible.
4. The use of tools: drill, bench drill.Work while water cooling, can effectively extend the service life of drill bit, recommend
drilling rate of 250-250 RPM.

Specification:
Material: HSS(High Speed Steel)
Shank: Hex Shank/triangle shanke
Shank Dia: 6mm
Shank Length: 30mm
Overall Length: 110mm
Size: 6-35mm( 6-8-10-12-16-18-20-22-25-28-30-32-35mm) 13 Step

order no.	type	groove	steps	each step shk	shk	CEL	color
305044125	HSS 4241 4-12mm	straight	5	7mm	6mm	42mm	gold
30504420	HSS 4241 4-20mm	straight	9	4.5mm	8mm	52mm	gold
30504432	HSS 4241 4-32mm	straight	15	4mm	10mm	78mm	gold
305034125	CO M35 4-12mm	straight	5	8mm	6mm	43mm	cooper
30503420	CO M35 4-20mm	straight	9	4.5mm	8mm	52mm	cooper
30503432	CO M35 4-32mm	straight	15	4mm	10mm	78mm	cooper

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Product Detail

Product Tags

4-12 4-20 4-32 mm Step Drill Bit Drilling Power Tools for Metal High Speed Steel Wood Hole Cutter Cone Drill
1, A unique ladder structure, a drill can open a variety of specifications size aperture, a ladder drill on a box of drill bit.
2, Do not use the center red, compared with ordinary twist drill is not easy to break. Site construction, a ladder drill a variety
of specifications apply.
3, Deburring, chamfering, open hole expansion, twist drill can not complete the function it becomes possible.
4, Compared with ordinary twist drill. Shaking small, without leading the use of the center can also open out the beautiful
aperture out.
5, The use of tools: pistol drill, bench drill. While working while cooling water, can effectively extend the drill bit
Life, recommended drilling speed 250 – 400 turn.
TIPS:
the SET include:step drill 4-12mm/4-20mm/4-32mm+Saw drill 3/6/8mm
Material: high speed steel 4241 (suitable for use in hardness under 25 ° artifacts, such as
Iron plate, aluminum board, PV panel, insulation board)