Feature control frames, datums A-B-C, MMC and bonus tolerance, position, flatness, parallelism, profile, runout and CMM checks: in the standard it's a wall of text. Here each topic fits on one page, with the drawing and what you need to remember. 64 illustrated pages.
🔒 Secure checkout · PDF by email · 30-day guarantee
One concept per page, the drawing that shows you how it works and the boxes with what you need to know:
Swipe to see more →
These are real pages from the book. The table of contents is the full one: 11 parts and 60 topics.
You've read what ⌖ | Ø.010 Ⓜ | A | B | C means three times. You close the book...
...and you can't say what the Ⓜ applies to, or which datum the part sits on first. It was just lines of text.
Here the frame is one page, drawn large, box by box: symbol, Ø, tolerance, modifier, then datums A, B and C, each box with its phrase in plain words.
And on the pages next to it, each control gets its own: flatness, parallelism, position, profile and runout.
First you understand why it's read that way. Then the order sticks on its own.
GD&T and the standard, rules and symbols, the feature control frame, datums, form, orientation, position, bonus tolerance, profile and runout, measurement and reading full prints: 64 pages, all drawn
Picture this:
Instead of rereading half a page about bonus tolerance without being able to see it...
...you open the page and find the hole drawn at its smallest and at its largest size, with the position zone growing from Ø.010 to Ø.016 right beside it.
And datums, flatness, position, profile and runout turn into drawings and tables you can read at a glance.
You stop memorizing and start understanding.
That's exactly what The GD&T Sketchbook does. It's not “just another manual.” It's 11 parts and 60 drawn topics, and at the end a fully toleranced bracket walkthrough, the frequent mix-ups and an exam day checklist. Because what your brain sees in order, it remembers.
Because what your brain sees organized, it remembers.
What GD&T adds to a drawing, Y14.5-2018 and its status in 2026, the two levels of the optional GDTP, its exam weights, passing score and retakes, and how to use the book.
Features and features of size, basic dimensions, MMC and LMC on holes and pins, Rule #1 and Rule #2, the 12 symbols and where concentricity and symmetry went.
The frame read box by box, the Ø symbol and the shape of the zone, material condition modifiers, datum feature symbols and the projected tolerance zone.
Datum, datum feature and simulator, six degrees of freedom, the 3-2-1 rule on a block, how A-B-C precedence changes the setup, holes and shafts as datums, and datum targets.
Straightness of surface lines and of an axis, flatness, circularity, cylindricity, and how a form control works with Rule #1.
Parallelism, perpendicularity of a surface and of an axis, angularity with its basic angle, how orientation also limits flatness, and the location-orientation-form hierarchy.
Plus-minus vs position, the square vs cylindrical zone and the 1.57 factor, true position from basic dimensions, hole patterns, floating and fixed fasteners, and coaxial features.
Bonus tolerance worked step by step on a hole and on a pin, LMC and minimum wall, virtual condition, and inner and outer boundaries.
Profile of a line and of a surface, bilateral, unilateral and unequal zones, profile with and without datums, and circular and total runout.
Surface plate grades, dial indicator setups, go/no-go gages, functional gages for position at MMC, CMM points and fitting, and checking at 20 °C (68 °F).
Reading a print from title block to frame, a fully toleranced bracket, which Y14.5 edition is on the drawing, frequent mix-ups and a GDTP exam day checklist.
At the end of the book: A fully toleranced bracket walkthrough, the frequent mix-ups and a GDTP exam day checklist.
All 12 Y14.5-2018 geometric characteristic symbols on one printable page, each with its tolerance zone sketched beside it, to pin up next to your bench.
Review the vocabulary in short sessions: the term on the front, a one-line definition and a tiny sketch on the back, so MMC, virtual condition and datum feature simulator stop blurring together.
📄 This is a digital PDF book sent to your email: nothing is printed or shipped.
PDF by email: The GD&T Sketchbook reaches your inbox as a PDF, and the two free books come by email too. One-time payment, no installments or hidden costs.
One concept per page, from features of size to datums and position, to study on your breaks and keep next to the print.
The Y14.5-2018 concepts in a set order, the two exam levels laid out, and an exam day checklist at the end.
A quick reference for daily calls: bonus tolerance with numbers, the A-B-C setup on the surface plate and how each callout is checked on a gage or a CMM.
📄 This is a digital PDF book sent to your email: nothing is printed or shipped.
30-day guarantee: tell us what didn't work and we'll refund 100%.
You have 30 days to try The GD&T Sketchbook and the two bonus books. If it doesn't work for you, write to us, tell us what didn't work and we'll refund 100% of what you paid. One-time payment, no subscriptions, no surprises.
After you buy, you get an email with The GD&T Sketchbook as a high-resolution PDF, to read on your phone or print. The two bonus books, The 12 Symbols Card and 250 GD&T Terms on Cards, also come by email.
One-time payment of US$ 37. No installments, no subscription.
For quality inspectors, machinists, CNC programmers, drafters and design engineers who work with GD&T prints, and for anyone preparing for the optional ASME GDTP. It builds up from features of size, so it works whether GD&T is new to you or you have years of ± prints behind you. Check the table of contents above to see the topics.
Yes. It's based on ASME Y14.5-2018 (reaffirmed 2024), explained in our own words and drawings, and on the ASME GDTP Applicant Information Handbook for the exam pages. The frame, datums, position and bonus tolerance read the same way on 2009 prints. One page shows how to tell which edition is on the drawing and what changed, such as concentricity and symmetry, which the 2018 edition removed.
No. It's an independent study book, not affiliated with or endorsed by ASME, and it doesn't come with a certificate or a GDTP credential. It doesn't reproduce the text or the figures of the standard, and every drawing is our own. If you need the official wording, you'll need to buy Y14.5 from ASME.
No. It's a visual reference to study and review. It doesn't replace the standard, a GD&T course, your company's quality procedures or what your customer's drawing requires.
No. The book itself doesn't include test questions. The practice questions in the optional add-ons are original, exam-style questions written for this material, not official ASME GDTP questions.
Yes. It's a high-resolution PDF you can print at home or at work and keep next to the bench. The 12 Symbols Card is made to pin up.
You have 30 days. Write to us, tell us what didn't work and we'll refund 100% of what you paid.
You don't have to reread the same page hoping it sticks this time.
You don't have to memorize callouts you can't picture.
And you certainly don't have to face the next print without knowing where to start.
There's an easier way. And it's one click away. Now it's your turn.
One-time payment: US$ 37 · Guarantee: 30 days · PDF by email
YES, I WANT THE GD&T SKETCHBOOK FOR US$ 37📄 This is a digital PDF book sent to your email: nothing is printed or shipped.
