As part of my ultimate goal to reduce workshop clutter, I have now turned my attention to my drill bit drawer.
I have self-centering bits, brad-point bits, jobber-length twist drill bits, mechanics-length bits, Forstner bits, spade bits, self-feeding bits, and auger bits.
There is a lot of overlap, and while I’m not throwing anything away I need to pick and choose which drill bits stay in the workshop and which are given away or sent to offsite storage.
These Irwin Speedbor Max drill bits are not quite spade bits, nor are they true auger bits. I suppose you could consider them hybrid self-feeding auger spade bits.
Pros: 3-spur fluted design for quick chip removal, self-feeding screw tip, 1/4″ hex shank, less drilling pressure and effort needed.
Cons: 1/4″ hex shank, somewhat short flute lengths reduce performance in deep holes.
Irwin Speedbor Max drill bits bore quick clean holes in wood. I wish their shanks were thicker, but I don’t have any reason to believe they need to be thicker. The 1/4″ shanks mean they fit common 1/4″ hex chucks, but I typically use these bits with cordless drills equipped with keyless 3-jaw chucks.
Speedbor Max drill bits are pricier than regular flat spade bits, but they’re still very affordable. They perform decently, but the screw tip and triple flute spur design make these bits better suited for more powerful drills. On the other hand, less effort is needed on the user’s part.
Sizes range from 7/16″ to 1-1/2″. The two largest bits have 3/8″ shanks. You can buy these bits individually or as part of 3pc, 6pc, and 10pc sets.
Transparency: I have purchased Speedbor Max drill bits and sets in the past, and would purchase them again. Irwin has also provided a set or two of these bits as well. I have lost track as to whether the bits on-hand now were purchased or supplied by Irwin.