Micrometers - Digit Counter
Micrometers - Digit Counter
Reading a vernier scale accurately takes practice most shops don't have time to build. A digit counter micrometer solves that by converting the spindle's movement to a mechanical number wheel instead, no battery, and faster to read than lining up two scales by eye. Fowler's line covers standard outside ranges, ball-anvil models for tube walls, disc and point anvils for grooves and threads, and multi-piece sets.
Fowler 0 - 1" Digit Counter Outside Micrometer
$131.00
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How to choose
Standard vs. special anvil
Outside micrometers vs. ball, disc, and point anvils
A standard digit counter micrometer measures between two flat faces, covering most general work. Ball-anvil models reach inside a tube to measure wall thickness, and disc micrometers use large-diameter discs to enter narrow grooves and slots. Point micrometers use a sharp anvil for thread and screw-cutting comparisons. Match the anvil to the feature, not the other way around.
Range
Buying incremental ranges vs. a set
Digit counter micrometers cover 1" of travel each, so a 0 to 4" measuring capability means either four separate micrometers or a set that bundles them. A set costs more upfront but covers the full range in one purchase, worth it if the shop regularly measures parts across several size ranges.
Cost vs. electronic
Where digit counter earns its keep
A digit counter micrometer typically costs more than a comparable mechanical vernier model but less than an equivalent electronic one, while avoiding the battery entirely. It's the middle option: faster to read than vernier, no battery to manage like electronic.
Common questions
It measures wall thickness on tubes and sleeves. The ball anvil reaches inside the tube while the flat spindle contacts the outside, giving a direct wall-thickness reading a standard flat-anvil micrometer can't take.
Each micrometer only covers 1" of travel. A set bundles several ranges, 0 to 1", 1 to 2", 2 to 3", and so on, into one purchase, which is usually cheaper and more convenient than buying each range separately if the shop needs the full span.
Yes. Any precision micrometer, mechanical or electronic, should be checked against a gage block or standard on a regular schedule. The digit counter display doesn't change that requirement.