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Gage bench toolkit

Everything for the gage bench

Tools, worked examples and a care checklist in one place. Ticks stay on your device.

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Gage bench toolkit

The Gage bench toolkit is a simple free page: links to the gage block tools and worked examples on AskMachinist, plus a care checklist. No login, works on your phone, and anything you tick stays on your device.

Gage block toolkit

Gage block stack calculator: the fewest-block stack for any size, inch or metric.
Worked gage block stacks: common sizes solved step by step.
Temperature correction: how much blocks and parts grow away from 20 °C.
Sine bar calculator: stack height for any angle.
Compound sine plate: two stacks for two angles.
Magnetic sine chuck: stack height for angle grinding.
Blade micrometer: groove diameters, checked on gage blocks.
V-anvil micrometer: 3- and 5-flute tool diameters.
Tube micrometer: wall thickness, checked on gage blocks.
Indicating micrometer: sort parts against a gage block master.
Toolmaker's microscope: small features and angles.
Ultrasonic thickness gage: calibrate on gage blocks.
ISO 286 fits: set bore and mic limits on gage blocks.
Thermal correction: correct readings to 68 °F.
True position: hole location with MMC bonus.
Box parallels: tall setups with gage block fill.
Check a taper with a sine bar: half-angle stack and sweep.
How to choose a gage block set and gage block grades explained.
How to wring gage blocks and care and wear blocks.
Check a micrometer and check calipers with gage blocks.

Gage block care checklist

General good practice. Your ticks are saved in this browser only.

Wipe blocks with a lint-free cloth and solvent before use
Let blocks and part soak to the same temperature (aim for 20 °C / 68 °F)
Check wear blocks and faces for burrs or nicks; stone lightly only if your quality system allows it
Wring the largest blocks first, then the smaller ones
Handle blocks with gloves or tongs to limit body heat
Unwring right after use; never leave a stack wrung overnight
Clean, then coat with rust preventive before storing
Return each block to its marked slot and close the case
Note the calibration due date on your set

Care and setup guides

Check and calibration guides

Before a critical check

A quick routine before a first-article or final inspection reading. Saved in this browser only.

Confirm the gage is in calibration (sticker or log in date)
Clean the gage, the part and the plate or anvils
Let gage, part and masters soak to the same temperature
Zero or master the gage against a gage block or setting standard
Check the drawing for the feature, datum and tolerance you are verifying
Use steady measuring force (ratchet, friction thimble or consistent feel)
Take at least two readings and check repeatability
Record the reading, gage ID and who checked it

FAQ

What is the Gage bench toolkit?

A free AskMachinist page that gathers gage block calculators, care guides, check guides and two checklists in one place. No login.

Where are my checklist ticks saved?

Only in your browser's local storage on this device. Nothing is sent to a server, and Clear ticks resets them.

How often should gage blocks be calibrated?

Many shops use one to three years depending on use, grade and quality system. See the calibration interval guide.

Is the gage block calculator free?

Yes. The Gage Block Calculator at gageblockcalc.com builds inch and metric stacks with no login.

General shop information only — follow your quality system and the block maker's instructions for compliance work.

More free calculators on the tools page, and more reading in the guides.