Step drill bits are convenient for drilling clean holes in sheet metal and thin panels in one go. They can also be used to enlarge existing holes. Step bits are often used by electricians, but can also be used in other trades and for metal fabrication work.
Earlier this month I had been looking for something on Milwaukee Tool’s website when I discovered that they recently came out with a new line of stepped drill bits.
Milwaukee already offered a line of step bits, and it looks like these new jam-free bits are taking their place.
- Dual flute design for faster and jam-free cutting performance
- Optimized for cordless drills and high speeds for quicker drilling
- Rapid Strike tip for fast accurate starts
- Black oxide coated for corrosion resistance
- Up to 50% more holes per battery charge
- Laser-engraved markings
- 3-flat shanks for reduced slippage
It might seem trivial, but I like that new bits are properly numbered with industry-standard designations, e.g. #1, #2, #4.
All 11 of the new step bits are available individually, and there are also a few money-saving combo kits.
Step Drill Bit Sizes
|Model Number||Hole Diameter||Number & Steps||Increments||Shank Size|
|48-89-9201||1/8″ – 1/2″||#1, 13||1/32″||1/4″|
|48-89-9202||3/16″ – 1/2″||#2, 6||1/16″||1/4″|
|48-89-9203||1/4″ – 3/4″||#3, 9||1/16″||3/8″|
|48-89-9204||3/16″ – 7/8″||#4, 12||1/16″||3/8″|
|48-89-9205||1/4″ – 1-3/8″||#5, 10||1/8″||3/8″|
|48-89-9206||3/8″ & 1/2″||#6, 2||1/16″||1/4″|
|48-89-9208||1/2″ – 1″||#8, 9||1/16″||3/8″|
|48-89-9209||7/8″ & 1-1/8″||#9, 2||NA||3/8″|
|48-89-9211||7/8″ – 1-7/32″||#11, 13||NA||3/8″|
|48-89-9212||7/8″ – 1-3/8″||#12, 5||NA||3/8″|
These new Milwaukee step bits, as well as the older ones, are made in the USA.
Buy Now(via Home Depot)
While Milwaukee’s up to 2X faster-cutting, up to 4X longer-lasting, and requiring up to 50% less battery power claims seem a little hard to fully trust at face value, the Dual-Flute design, with two cutting edges 180° apart instead of just one, should satisfy some of these claims.
I tend to strongly favor Irwin Unibit step bits, but always try to keep an open mind about other brands. The next time I shop for new step bits, I will probably look a much closely at Milwaukee’s.