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Details

 Details

Big-Set-32-20-12
Drills	Drill Size Combinations	Material	Coating	SKU	Price [without VAT]
Big Drill	Ø 4,6,8,10,12,14,16,18,20,22,24,26,28,30,32	HSS	Titanium	1104001	5.10 €
Middle Drill	Ø 4,6,8,10,12,14,16,18,20
Small Drill	Ø 4,6,8,10,12
Small-Set-20-12-12
Big Drill	Ø 4,6,8,10,12,14,16,18,20	HSS	Titanium	1104002	3.60 €
Middle Drill	Ø 3,4,5,6,7,8,9,10,11,12
Small Drill	Ø 4,6,8,10,12
Spiral-Set-32-20-12
Big Drill	Ø 4,6,8,10,12,14,16,18,20,22,24,26,28,30,32	HSS	Titanium	1104003	8.40 €
Middle Drill	Ø 4,6,8,10,12,14,16,18,20
Small Drill	Ø 4,6,8,10,12
Images
Big-Set-32-20-12   Small-Set-20-12-12   Spiral-Set-32-20-12
Pictures, dimensions,table data and technical drawings of this product are made with reasonable care and liability is excluded for the accuracy and correctness of this data.

 Applications

Can be used for drilling holes in:

• Steel
• Stainless Steel
• Copper
• Brass
• Aluminum
• Plastic and Laminates

Stepped Drills and Unibits work exceptionally well on sheet metal. They can be used on other materials as well, but you won’t get a straight smooth-walled hole in solid materials thicker than the step height. Step drills are designed to combine several drilling operations as well as countersinking and or counterboring operations into one step.

Stepped Drills is a drill bit that has the tip ground down to a different diameter. The transition between this ground diameter and the original diameter is either straight, to form a counterbore, or angled, to form a countersink. The advantage to this style is that both diameters have the same flute characteristics, which keeps the bit from clogging when drilling in softer materials, such as aluminum; in contrast, a drill bit with a slip-on collar does not have the same benefit.

 Practical Use

Stepped Drills are commonly used on sheet metal and in general construction. One drill bit can drill the entire range of holes necessary on a countertop, speeding up installation of fixtures. They are most commonly used on softer materials, such as plywood, particle board, drywall, acrylic, and laminate. They can be used on very thin sheet metal, but metals tend to cause premature bit wear and dulling.Unibits are commonly used on sheet metal and in general construction.

One drill bit can drill the entire range of holes necessary on a countertop, speeding up installation of fixtures. They are most commonly used on softer materials, such as plywood, particle board, drywall, acrylic, and laminate. They can be used on very thin sheet metal, but metals tend to cause premature bit wear and dulling.
Unibits are ideal for use in electrical work where thin steel, aluminum or plastic boxes and chassis are encountered. The short length of the unibit and ability to vary the diameter of the finished hole is an advantage in chassis or front panel work. The finished hole can often be made quite smooth and burr-free, especially in plastic.

An additional use of unibits is deburring holes left by other bits, as the sharp increase to the next step size allows the cutting edge to scrape burrs off the entry surface of the workpiece. However, the straight flute is poor at chip ejection, and can cause a burr to be formed on the exit side of the hole, more so than a spiral twist drill bit turning at high speed.