I'm now selling these on my website and they have replaceable heads!!! [https://www.3dlocksport.com/products.php#!/Small-Bump-Hammer/p/155655426/category=39551008](https://www.3dlocksport.com/products.php#!/Small-Bump-Hammer/p/155655426/category=39551008)

I bought a Sparrows Bump Key Hammer. It is a great piece of equipment, however it is very large, as are most Bump Key Hammers. I wanted to make a smaller one that could be carried with me or at least in a smaller bag/case. So I designed this one!

One thing to note. Unlike a full sized Bump Key Hammer, you DO NOT fully grip the handle. You should hold the end of the handle between your pointer finger and your thumb and kind of let it "rock/wiggle" has you hit the bump key.

See a video of me using it here:

I made a full size version! Check it out here: [https://www.thingiverse.com/thing:2712872](https://www.thingiverse.com/thing:2712872)

Print Settings

Printer Brand:

Ultimaker

Printer:

No

Supports:

Layer Height 0.1mm

Infill:

Notes:

I printed this with a 8mm 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