Shop tools, built in
Six things you would otherwise reach for a chart, a phone calculator or a website to work out — sitting in a rail beside whatever you are already doing, so you do not lose your place.
The reference charts on these pages are free to read with no account. The tools themselves are inside MechCircle, which is free to start.
Tap Drill
Hole sizes for cutting and forming taps, metric and inch, at the engagement you choose.
Read more →Surface Finish
Convert between Ra in microns, Ra in microinches, RMS and ISO N grades.
Read more →Fit Tolerance
Deviations and limit sizes for shaft and hole grades, 1 to 250 mm.
Read more →Material Calculator
Weight and material cost per part from round, hex or square bar, with your own allowances.
Read more →PDF Merge and Split
Combine drawings into one PDF, or pull a page range out of a set, in your browser.
Read more →Calculator
A calculator that stays open beside your work, with a running history.
Read more →Why they are here and not on six other websites
Each one opens over the page you are on, keeps what you typed for the session, and remembers the settings that are really yours — your parting-off allowance, your material rates. Nothing you enter leaves your device.
Ready to get started?
All six are included, along with tasks, files and direct communication with your customers, suppliers and consultants.