Round shank HSS tin-coated step drill bit

Unique step structure, a drill can open a variety of sizes of aperture, a step drill against a box of drill.  Does not need to use the center punch, compared with the ordinary twist drill is not easy to break. Site construction, a step drill for a variety of specifications.  Deburring, chamfering, opening elliptical hole reaming, twist drill could not complete the functions it became possible.  Compared to a regular twist drill.  Small shaking, do not need to use the center can also open a beautiful aperture out.  Tools: handgun drill, bench drill.  While working, water injection cooling can effectively extend the service life of the drill bit, and the recommended drilling speed is 250-400 RPM.  

Model Number GM0330001

Material HSS 4241/ HSS 4341/ HSS 6542/ HSS M35

Size 1/4"~1 -3/8" *10 steps

Color TiN-coated

Package double blister card / plastic box

MOQ 1pc for sample testing

10000pcs for mass production

Feature New HSS Steel Large Step Cone Drill Titanium Bit Set Hole Cutter,

which is made from high quality HSS steel, and with the Titanium coated to reduce friction and heat

Delivery time 15~45 days, according to order quantity

Payment terms T/T, D/P, L/C, Paypal, Western Union, ect.

Certificated BSCI

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