|Item Weight||4 ounces|
|Product Dimensions||6 x 4 x 1 inches|
|California residents||Click here for Proposition 65 warning|
|Item model number||10193A|
|Material||High Speed Steel|
|Item Package Quantity||1|
|Number Of Pieces||3|
|Cutting Diameter||0.125 inches;0.5 inches|
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Neiko 10193A Titanium Step Drill Bit Set, High Speed Steel | 3-Piece Set | Total 28 Sizes
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- TITANIUM | HIGH SPEED STEEL: classic high speed steel with titanium coating for proven capability and durability in drilling holes in plastic, aluminum, copper, stainless steel and many other types of sheet metal
- 135° SPLIT POINT TIP: increases cutting speed with self-centering and prevents walking
- TWO-FLUTE DESIGN: clears chips faster and allows particles to escape easily
- TRI-FLATTED SHANK: fits into power tools chuck securely and eliminates slip
- SET INCLUDES: Bit #1 (6 steps): 3/16", 1/4", 5/16", 3/8", 7/16", 1/2"; Bit #2 (13 steps): 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"; Bit #3 (9 steps): 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"
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This compact set replaces 28 individual drill bits. 3pc Step Drill Bits. 1/8"- 1/2", 3/16"- 1/2", 1/4"- 3/4". Two-flute design for faster, smoother cutting. Package comes with one 3/16-inch to 1/2-inch six-step bit, titanium coated. One 1/4-inch to 3/4-inch nine-step bit, titanium coated.
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I needed four 3/4” holes in a thick post for driveway gate hinges. They are J-hinges with 3/4” bolts that go through the post.
To drill the holes, I placed painters tape on the post and marked where the holes should go on each side. I then used a spike and heavy hammer to punch a small indention into the metal. All of the drilling was done with a Ryobi cordless drill, which I had to recharge about half way through. I used a regular 1/8” drill bit to make an initial hole all the way through the metal (this was a regular black bit that had come as a starter set with my cordless drill). I then put this step bit in to widen the whole all the way to 3/4”.
As for technique, I used a very very slow speed to essentially scrape away the metal. I used firm steady pressure. But did not use any kind of oil.
A great titanium step drill set for the money
Next project was in wood to enlarge the holes in a guitar headstock from 5/16 to 3/8, without moving the existing center of the holes. These are perfect for the job. For deeper cuts (deeper than this bit's shoulder depth) as in my wooden headstock, I started the hole diameter with this step drill to get the perfectly centered hole, then I finished it to the final depth with the same sized Forstner bit.
For the price these are great to have around instead of trying to rough out a hole to enlarge it. I keep these in my tool box close at hand so I will grab these and do it right when the job calls for it, instead of hacking with a regular drill bit.
I haven't tied using them on anything thicker than a 1/4" but for anything thinner these drill fine.