A printable hammer with TPU grips meant for light duty, not construction sites. I couldn't make a sturdy 3D printed nail puller, so that is omitted from this design. The hammer has a nice weight and is well balanced when the appropriate metal bolt is installed.

Bolt Compatibility

I recommend 5/8in (~15.6mm) bolts for the hammer face. The bolt can be screwed directly into the hammer.

Bolts that are smaller will work if they are around 3.5-4 inches (90mm) total length. Use a nut to secure it into the hammer head.

A 3D printed bolt is also included in the files with a printed pin to secure it in place. I would only use this to print a soft hammer face out of TPU.

Grips

There are several grip styles to choose from, but none are required. To install the grip, press or hammer (ironic) the hammer into the grip. There is a horizontal line on the hammer shaft which shows where the top of the grip should reach.

Why bother?

The cheapest 10oz hammer I found was $7.50 at the hardware store. So it was more expensive for me in time and effort to make this hammer. By a lot. BUT, now that it's made, anyone can print a hammer for…$3? I was tired of various hammers being lost around the house so it's nice to have a few cheap ones around. And they do look cooler than a generic wood handle hammer. Anyway, consider this as a case study, I suppose.