Dieter Schmid's Fine Tools
Multi Purpose Drill Bits

Multi Purpose Drill Bits

A decent drill bit that copes with a wide range of materials? Moreover, one that drills fast and splinter-free? Hard to imagine, but the STAR-M does all that. This drill bit is suitable for European soft- and hardwoods, many types of synthetic materials such as acrylic, ABS, PVC, as well as hard rubber and bamboo. The manufacturers call their STAR-M a bamboo drill bit, and when used on this material it really performs impressively.

This drill bit is a successful combination of a spiral and an auger drill bit. The spur cutters leave a clean hole edge, while the two curved main cutting edges quickly get down to the job even at moderate pressure. Straight cutting edges enter the wood along the full width, curved cutting edges - as on this drill bit - proceed more gradually because initially they do not cut along the full width. This results in a smoother cutting surface. At the same time, the spur cutters perform the function of a chip thickness limiter. The chips do not get too thick and are uniform and you end up with a cleaner hole. Using the drill bit on convex surfaces, such as PVC pipes or bamboo rods, also works very well. Thanks to its sharp centring point the drill bit will not wander.

All these drill bits come with a 6.35 mm hexagonal shank and will thus fit into any drilling machine and be quick to swap in any power screwdriver. The chemically (not electroplated) nickel-plated finish protects the drill bits against rust.
Recommended rpm up to Ø 12 mm: 3000 min-1 or less
Recommended rpm above Ø 12 mm: 1300 min-1 or less

Note: Intermediate sizes will prove surprisingly useful when you want a really tight dowel fit. Simply drill an 11.5 mm hole for a 12 mm dowel! Works particularly well with softwood if the hole is not too near to an edge.

Video, in Japanese
Multi Purpose Drill Bit
Diameter
mm
Total length
mm
Spiral length
mm
CodePrice
3 80 35
Code 312372CartPrice € 8.50
3.5 80 35
Code 312373CartPrice € 8.60
4 80 35
Code 312374CartPrice € 8.70
4.5 80 35
Code 312375CartPrice € 8.80
5 80 35
Code 312376CartPrice € 8.80
5.5 80 35
Code 312377CartPrice € 8.90
6 80 35
Code 312378CartPrice € 8.90
Diameter Total length Spiral length CodePrice
6.5 80 35
Code 312379CartPrice € 8.90
7 80 35
Code 312380CartPrice € 11.50
7.5 80 40
Code 312381CartPrice € 11.60
8 80 40
Code 312382CartPrice € 11.70
8.5 80 40
Code 312383CartPrice € 11.80
9 80 40
Code 312384CartPrice € 11.90
9.5 80 40
Code 312385CartPrice € 11.90
Diameter Total length Spiral length CodePrice
10 80 40
Code 312386CartPrice € 13.50
10.5 80 40
Code 312387CartPrice € 13.60
11 80 40
Code 312388CartPrice € 13.70
11.5 80 40
Code 312389CartPrice € 13.80
12 80 40
Code 312390CartPrice € 13.90
15 116 66
Code 312392CartPrice € 15.90
18 116 66
Code 312394CartPrice € 17.90
21 125 75
Code 312397CartPrice € 21.90

Multi Purpose Drill Bits

Multi Purpose Drill Bits
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