Hands-Free (hammer) drill dust collector

Everyone needs to drill holes. It would be nice to have a tool to collect that dust, though. And it would be nicer if that tool is hands-free. That's what this project is all about.

This is especially useful when drilling holes into concrete walls, with a hammer drill. Then you really need both your hands to do it. But it works with a regular cordless drill as well.

This dust collector has springs, to allow the dust collector head to stay firmly on the wall when positioning the drill bit and drilling the hole. 

It also has 4 guides that allow for better precision and a fixed length stop.

It can actually be used in 3 configurations:

1. both springs and guides - it has the best precision 
2. just with the springs - it's stable enough and allows using the full compression length of the springs
3. just with the guides - it gets the job done and it's easier to print and assemble, however, it requires manual repositioning after each usage

The dust collector head can be rotated, to position it with the collecting side down, after the device is mounted on the drill, and is easy to remove and clean. It has good adherence to the wall too.

For a regular hammer drill this allows drilling 30mm holes, using 55mm hammer drill bits and using the front handle, in the configuration with the 90mm springs and the 30mm dust collector head. 

If you want to use the drill without the front handle, it allows drilling 40mm holes, using the 100mm springs and the 40mm dust collector head.

If using the longer 105mm hammer drill bits, holes up to 60mm can be made, using the 110mm, 120mm, 130mm springs and the 50mm or 60mm. Actually, you can use whatever combination suits your needs. Here are some tips about how to chose the best configuration.

Choosing the configuration for your use case:

Before choosing the configuration of the dust collector, first mount the drill bit you want to use and measure the distance from the tip of the bit to the zone where the dust collector base will be, on the drill. Then, choose the springs length and the dust collector length so that, when installed, the dust collector's head extends to the minimum possible over the drill bit's head. Here's a picture to clarify what I'm talking about:

See how the collector's head extends just a tiny bit over the tip of the drill bit? This is the optimal scenario. You don't want the drill bit to be longer,  because, at the beginning, you'll lose some dust, and you don't the collector to be much longer, because then you'll end up with a less deeper hole.

Note:

I know there are a ton of types of drills out there, so if these dimensions don't work for you, drop me a message and I'll add parts to fit your needs.

Printing instructions

The recommended material for this is PETG, for all parts.

Walls count: 5

Infill: 10% rectilinear

Assembly instructions

1. Prints 4 springs and the corresponding cases for them. For example, if using the 90mm spring, print the inner_case_for_90mm_spring.stl and the outer_case_for_90mm_spring.stl to go with it.
2. Assemble the springs with cases as shown below: 

  3.  Print the terminal support ring and a base support ring. For the base support ring,  try first with the hard_grip one. If it's not working, try the softer_grip one. If none of them works, send me a message with info about the drill you're using and I'll create a new ring type of adjust the existing ones.

4. Mount the springs and the rings together, like this:

5. Install the 4 guide pillars with the corresponding dimensions. Insert them through the holes in the terminal ring and snap them in the slots from the base ring.

6. Finally, add the dust collector head. The whole assembly should look like this: