Bore Gages - Digital MicroGage
Bore Gages - Digital MicroGage
How do you measure a bore smaller than a quarter inch? The MicroGage packs a 2-point electronic head and digital readout into a package the size of a ballpoint pen, reads to 0.0005mm (0.00002″), and sends results over Proximity-RS232 or USB output. Each head zeroes in a setting ring supplied with UKAS certification as standard. Buy heads individually or as sets with head, cone, readout and setting ring, covering 0.037″ to 0.407″ (0.95 to 10.35mm) bores.
Fowler Bowers 0.037 - 0.061"/0.95 - 1.55mm MicroGage
$3,871.80
Price
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How to choose
Right-sizing
Every MicroGage is purpose-built for one bore range
Each MicroGage model is engineered for one narrow span, as tight as 0.037" to 0.061" on the smallest unit, which is exactly what lets it hold accuracy other gages can't reach at that scale. Match the bore diameter to the model's stated range when ordering, and the fit and the reading are both exact.
Validation
What 2-point measurement is built for
A 2-point gage reads diameter directly between two contact points across the bore, which is exactly what a small-bore diameter check calls for. It's built for diameter, not roundness, the same distinction that separates any 2-point and 3-point gage at any size. For verifying bore diameter on small parts, that focus is the whole point.
Not inexpensive...
Why this costs what it does
These sit well above a standard bore gage's price, from roughly $2,500 to $5,000 depending on range. That price buys electronic 2-point accuracy at a scale, under half an inch, that takes real engineering to hold. For bores larger than about a half inch, a standard dial or electronic bore gage is the more economical choice.
Common questions
The two differ in range and mechanism. MicroGage is an electronic 2-point system purpose-built for bores under about a half inch, a scale most dial bore gages aren't designed to reach. For bores above that size, a standard dial or electronic bore gage is the more economical choice.
It's built to hold electronic 2-point accuracy at a bore diameter scale, under half an inch, that takes real engineering to achieve and maintain. The price reflects that specialized manufacturing, not a markup over some comparable standard tool, since nothing standard reaches that range.
Measure or estimate the bore diameter first, then match it against each model's stated range, since the ranges are narrow and don't overlap much. Ordering the correct range matters here more than with a typical adjustable bore gage, since a MicroGage is built for one specific span.