Roulette curve formed by a circle rolling along a line.
A pitch circle is an imaginary circle that would produce the same motion as the actual gear through pure rolling motion. The size of pitch circles for a given pair of mated gears fluctuates with center distance because they are imaginary by nature.
A toothed gear with a cycloidal profile.
Gear teeth generated in the internal diameter of a cylinder.
A toothed rotating machine element used to transfer mechanical energy or shaft power between shafts.
A gearwheel with teeth projecting parallel to the wheel's axis.
Also referred to as moment or moment of force; the measure of the rotational or twisting force which causes an object to rotate.
The orientation of the axes—along which the gear shafts lay and around which the gears rotate—in relation to each other.
The percentage value of the ratio of output power (i.e., input power minus power loss) to the input power.
A Module in gear terminology is a measurement unit that shows the size of the gear. Modules of two mating gears must be the same. It is calculated by dividing the gear’s reference diameter by the number of teeth.
The ratio between the output value to the input value; typically expressed as the number of teeth of the driven gear (output) to the number of teeth of the driving gear (input).
A type of epicyclic gear system comprised of spur gears.
Shaped like a triangle; having three sides and three corners.
Down
The gear closest to the power source (motor or engine) and attached to the driving shaft that provides the initial rotational input.
Teeth are made on the outside of a cylinder or cone.
The cross-sectional shape of the gear’s teeth.
A gear placed between the driving gear and driven gear; typically employed to allow for the transmission of motion without a change in the direction of rotation.
The gear or toothed component attached to the driven shaft which is impacted by the driving gear and exhibits the final output.
The outer surface of a hypothetical friction wheel that acts as a reference surface for setting the gear teeth is known as a pitch surface in gear terminology.
The thrust force parallel to the gear shaft.
The profiles of the teeth are involutes of a circle.
The shape of an ellipse, which is an elongated circle, stretched into an oval.
A wheel or bar with a series of projections on its edge, which transfers motion by engaging with projections on another wheel or bar.
A type of cylindrical gear on which the teeth are helicoid, that has teeth that are cut at an angle to the axis of rotation.
Rotating mechanical devices with teeth that enable torque and speed transmission.
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All your puzzles are accessible from your 'My Puzzles' page, which you can access using the navigation bar at the top when you are logged in.
Be sure to log in using the same email address you used when you created your puzzle.
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There is a 'Make Printable' button on the top left of your puzzle that will let you sign up for a plan or purchase a single puzzle.
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Once you publish your puzzle, you can click the print icon or use your browser’s print function.
It looks weird when printed.
First make sure you’ve published your puzzle. See the 'How do I print?' section above for more information.
99% of other printing issues have to do with printer settings. Instead of trying to fiddle with printer settings, which can be time-consuming and frustrating, there are a couple workarounds you can try.
You can try printing from a different browser, since different browsers have different default print settings. Alternately, you can try saving as a PDF (next to the print icon) and print that.
Why isn’t this free?
We invested in building a number of premium features that free sites are unable to offer: the ability to automatically or manually add words to your puzzle, save-as-you-go puzzle editing, the ability to access your puzzles from any computer, an uncluttered and ad-free interface, the ability for friends and colleagues to solve your puzzles online, and quick responsiveness to reported issues.
My Crossword Maker is the lowest-price service we've found that provides these features, and is designed for people who are not satisfied with what free sites are able to provide.
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We’re sorry you thought My Crossword Maker was free, that must have been frustrating.
We’re constantly trying to provide a clear and straightforward user experience, and we’re not trying to hide the price: on the page where you make your puzzle, the price is listed in the overview in the top left (before you log in), below the 'Make Printable' button (after you log in), in the FAQ below the grid, and also in the tour.
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If you haven’t gotten the password reset email, check your spam folder, be sure you’re checking the email account that the email was sent to, and be aware that some school email systems block emails from non-school email addresses.
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Not all my words are in my puzzle.
When you hit the 'Arrange' button, our algorithm will try to arrange all your words on the grid, and will move words around to try to fit the most words.
This will get all the words on the grid about 90% of the time, depending on the word list. For the other 10%, you will get an alert explaining that the words that did not fit were added to the scratchpad.
It prints on two pages.
Big puzzles won’t always print on one page — the clues and grid are the smallest we could make them while keeping them readable for everyone.
That said, different browsers print in slightly different ways, so you could try using 'print preview' using a different browser (or try the PDF button) to see if you like how that looks better.
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Check your spam folder, and be aware that some school email systems block emails from non-school email addresses. Try providing a different email address if you think our emails to you are being blocked.
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