A 3D Printed Ratchet That Can Really Take The Torque

Printed tools aren’t exactly known for their durability, but [Gladius] shows us that with some thoughtful design, it’s possible to print a ratcheting wrench that can handle surprising amounts of torque.

Look closely, and you can see that the parts are almost entirely made up of perimeters (click to enlarge).

This particular wrench is inspired by NASA’s 3D printed ratcheting wrench, and also from an early 1900s design. It sports a 1/2 inch square socket into which modern adapters can be fitted, allowing those steel parts to do their job while the wrench itself delivers the muscle.

[Gladius] found that the strongest results came from slicing parts — especially the handle — so that they come out consisting almost entirely of perimeters, with virtually no traditional infill. Want to know more? There’s a discussion on reddit where [Gladius] goes into added detail about measurements and performance.

Over the years, we’ve seen our share of powerful prints. For example, what the Crimson Axlef*cker can do looks downright intimidating. Speaking of printing things that move, we want to remind you about this handy tip for easily and reliably joining motor shafts to printed parts by (mis)using jaw couplings.

Arbor Press Modded For Applying Specific Force

Arbor presses are simple and effective tools made for a particular task: exerting force in a specific spot. A 1-ton arbor press fits on a desktop and is very affordable, but doesn’t offer a lot of particularly fine control over the ram beyond lowering and raising it. [concreted0g] got to thinking about ways to gain more control and knowledge about the amount of force being applied, and made a simple modification to combine his press with a torque wrench.

He removed the spindle which raises and lowers the ram, and drilled and tapped it to fit a bolt. Now, by attaching a torque wrench to the bolt and using the wrench as the handle for lowering the ram, he can take advantage of the wrench’s ability to break at set amounts of force. As a result, he has a repeatable way to accurately apply specific amounts of force with a tool that usually lacks this ability. It looks like this mod is limited to lower forces only (too much could shear off the bolt head, after all) but it combines two tools in an unusual way to gain an ability that didn’t exist before, which is great to see. Mods and presses seem to go very well together; don’t miss this DIY thermal insert add-on¬†for an arbor press, and 3D printed dies for a press brake turned out to be remarkably durable and versatile, not to mention economical.