Product Details

Step drill bit are drill bits that are shaped like a cone and are comprised of multiple sizes, or steps, in a single package. These can be anywhere from two to 13 different bit sizes in increments of 1/32 inch to 3/4 inch, or 4 to 12 millimeters. The user simply starts the drill bit into the part to be drilled and pushes the bit in until the desired size hole has been drilled. The benefit is a step drill bit is that most are rated to last up to six times longer than a conventional drill bit.

Step drill bit are are not intended for use on wood, however. One particular use for these drills is with sheet-metal work. When the need for multiple sized holes would require the user to change drill bits over and over, step drills save time and expense in many cases over conventional drill bits. Use a drill bit with step increments slightly larger than the materials thickness that is to be drilled. By design, step drills are limited to use on thin material.

Beyond being a versatile drill bit, step drill bit can also serve as a countersink, which allows for screws and fasteners to be drilled below the surface. Counter boring is another use for these bits.

Specification	Steps	OAL	Shank Size	Material
4-12	5	65mm	6mm	HSS 4241/4341/M2/M35
4-12	9	65mm	6mm	HSS 4241/4341/M2/M35
4-20	9	75mm	8mm	HSS 4241/4341/M2/M35
4-30	14	100mm	10mm	HSS 4241/4341/M2/M35
6-38	12	100mm	10mm	HSS 4241/4341/M2/M35
6-26.75	8	75mm	10mm	HSS 4241/4341/M2/M35
4-39	13	107mm	10mm	HSS 4241/4341/M2/M35
6-32	8	75mm	10mm	HSS 4241/4341/M2/M35
6-30	9	80mm	10mm	HSS 4241/4341/M2/M35

Product display

Service

OEM are accept

Supply small order for test

Quick delivery

Replied in 24 hours

Your any requirement will receive our prompt and careful attentions.

shipping

Company Information

Shandong Osn Tools Co., Ltd is one of the leading tools factory in China specialized in manufacture and export abrasives, drills, bearings and we also supply the chuck and grinding fluid. Ever since established in year 1989, our business has expanded to worldwide. Our own brand is OSN and OEM service available as per clients’ demand.

Initially, our OSN mainly manufacture of abrasives products such as grinding wheel, sharpening stone and abrasive segment. With the development of business more and more clients demand the relevant products from us, so we set up new production lines for bearings, drills, lathe chuck and grinding fluid. Now our company occupies an area of 60,000 square meters with staff more than 500. Our goods have been entitled as State Industrial Products and the quality ensuring system has passed the authentication of ISO 9001:2000.

Our company equipped with advanced production facilities and test equipment, in order to ensure the good quality. Meanwhile the good quality and service, fast delivery also make us develop rapidly. Our products are exported to America, Europe, Middle East, Southeast Asia over 20 countries and regions

What’s clients’ need what’s our OSN pursues. Welcome friends worldwide come our factory for visit.