Micro Drill Selection: Diameter, Depth, Material and Point Geometry
Choosing a micro drill is a four-variable problem: diameter, hole depth as a multiple of diameter, workpiece material and point geometry. Getting the
Insights
4 notes on choosing a tool.
Geometry, coatings, cutting conditions and custom tooling — written for the person who has to choose a part number, not for the one selling it. If a number here ever contradicts a product page, the product page wins.
- Notes
- 4
- Categories
- 3
- Reading time
- 8 min
- Latest
- Sep 2026
Article archive
Every note in Technical Guide.
Newest first. Each note is one decision, explained — what to pick, when not to, and the failure mode if you get it wrong.
Categories
3 of 7 notes
Technical Guide
2 min
Micro End Mill Selection Guide for Miniature Features
Flat, ball nose, V-bit or chamfer? Micro end mill selection comes down to the feature geometry, the chip load available at small diameters and how muc
September 16, 2026
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Technical Guide
2 min
Micro Reamers: Achieving Tight Hole Size Control
Reamers exist because drills cannot hold the tolerance. This guide covers spiral versus straight reamers, taper reamers, runout sensitivity and how to
September 4, 2026
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Technical Guide
2 min
Cutting Tool Coatings Explained: TiN, TiAlN, AlCrN and DLC
Coatings do not make a bad tool good. They extend the life of a correctly designed tool in the right material. Here is what each coating actually does
August 23, 2026
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