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
7 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
- 7
- Categories
- 3
- Reading time
- 14 min
- Latest
- Sep 2026
Article archive
The other notes, newest first.
Newest first. Each note is one decision, explained — what to pick, when not to, and the failure mode if you get it wrong.
Categories
6 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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Application Note
2 min
Spindle Speed and Feed for Micro Tools: A Practical Setup Guide
Small tools fail from too much speed, not too little. This note covers practical spindle speed, feed per tooth, chip load and how to reduce them safel
August 11, 2026
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Buying Guide
2 min
What to Include in a Custom Micro Tool Inquiry
A complete inquiry halves the quotation time. Here is the exact information we need to quote a custom micro cutting tool properly, and why each item m
July 30, 2026
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Application Note
2 min
Drilling CFRP and Non-Ferrous Materials with Micro Tools
Carbon-fibre composites, aluminium and copper each fail micro tools in different ways. This note covers which tool geometry and coating handles each,
July 18, 2026
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