I'm now selling these on my site and they have replaceable heads!!! [https://www.3dlocksport.com/products.php#!/Bump-Hammer/p/155651360/category=39551008](https://www.3dlocksport.com/products.php#!/Bump-Hammer/p/155651360/category=39551008)

I bought a Sparrows Bump Key Hammer. It is a great piece of equipment. I wanted to see if I could replicate it and make one cheaper. From Sparrows the cost of the hammer is about $12 USD. This hammer costs about $5 USD in materials to make.

See a video of me using it here:

If you are looking for the mini version it is here: [https://www.thingiverse.com/thing:2707828/](https://www.thingiverse.com/thing:2707828/)

Print Settings

Printer Brand:

Ultimaker

Printer:

No

Supports:

Layer Height 0.1mm

Infill:

Notes:

I printed this with a 4mm brim.

Post-Printing

Nothing Much To Do!

I just had to trim off the brim. If you don't print with a brim, then there is no post-printing work to be done.

How I Designed This

I designed the whole thing in Tinkercad

Category: Tools