Bosch has come out with a new line of Turbo step drill bits, which they’re manufacturing in Switzerland.
The new Bosch Turbo step drill bits feature two cutting edges for “double cutting power,” a self-starting tip, optimized angles and steps for bur-free drilling performance, and spiral flutes for efficient cutting and fast drilling speeds.
These step drills are said to be optimized for cordless performance. These step drill bits can be used in a variety of thin materials up to 1/8″ thick, such as sheet metal, ducts, steel, non-ferrous metals, plastic, vinyl siding, plasterboard, PVC, stainless steel, and other materials.
Some of the new Bosch Turbo step drill bits have 1/4″ hex shanks and are said to be Impact Tough and suitable for use in impact drivers.
Bosch Turbo step drill bits are said to provide 2X longer life and also 2X the number of drilled holes per [cordless drill or impact driver] battery charge.
At the time of this posting there are only a couple of individual sizes and sets, and I would anticipate seeing more in the future. Bosch says the Turbo line will include a “Full range of diameters with options for use with cordless drill drivers or impactors.”
Curiously, a 3pc set with drill-compatible shanks is less expensive than a 3pc set with 1/4″ hex shanks ($84 vs. $105). All of the Bosch Turbo step drill bits are made from high speed steel, and so the only difference seems to be the shank.
Diablo is also coming out with new impact-rated step drill bits. They’re said to feature a split point tip design and increased step heights for common hole sizes.
Looking at product images, the Bosch bits also look to have greater step heights for certain sizes.
Here’s their marketing blurb:
Diablo’s new Step Drill Bits bring exclusive technology to the Electrician, Plumber and HVAC contractor with fast, accurate cuts and increased stability in thin metals, PVC other plastic materials.
As you might know (see also: tool brands, who owns what?), Freud and Diablo are owned by Bosch. At this time, it’s not clear if or how the Bosch and Diablo step drill bits might differ from each other, aside from highlight markings on the Diablo bits. If I were to choose between the two brands, I’d go by size/style and then price.