Ergonomic Eraser(Rubber) Case/Extension/Adapter

This product is meant to be a simple solution to that common rubber in your pencil case that keeps getting dirty all because of potential pencil shavings and graphite. A dirty rubber is often inevitable so this solution helps to change that. It's designed to fit common (vinyl) rubbers in a snug fit. That said, this rubber is my fifth iteration and offers a clean surface without any trademarks present because, well…lets be honest…nobody likes something that's made to be aesthetic to have a maker logo on it when the product is so frequently in use - that's just UNCOMFORTABLE.

The SIZES are as follows:

• Small (for rubbers that I would think are less frequently bought)
  • Width (13mm) x Length (16mm) - height is not included as it can vary depending on how much of the rubber you've already used (More on that under the "HEIGHT" heading)
  • ….Or for you geeks out there - 13 x 16mm
• Medium (Your common rubber)
  • Width (13mm) x Length (19mm) - Again,.. height isn't included as it varies. (More on that under the "HEIGHT" heading)
  • …13 x 19mm
• Large (Also your common rubber)
  • Width (13mm) x Length (23mm) - Height not included. (Please check under the “HEIGHT” heading)
  • …13 x 23mm

…By now you have probably realised that all of these rubbers have a WIDTH of 13mm that's because…well…most rubbers are. For those that are looking for a universal fit for all rubbers that just so happen to NOT be 13mm wide, I'm sorry. Creating a universal rubber design for all rubbers was not what I was aiming for as that wouldn't ensure an ergonomic fit, neither and arguably provide the final product with an aesthetic look.

I should also mention that each of these has a "Normal" and “Short” variant. I would advise getting the longer ("Normal") variant for those that have larger hands or if you have a rubber that's more than ~55mm long. If you need a more compact design or have a smaller rubber your best bet is the shorter ("Short") variant.

HEIGHT:

I've attached 5mm and 3mm Blocks as a way to push the rubber upwards so you always have access and control over how much of the rubber you want to see. These so called “Blocks” can be found in their corresponding folders. - the ones depicting the different Lengths of rubbers.

WHAT YOU NEED:

You need is pretty self explanatory but I'll take the time to explain it anyway. You need a “Main-Top”, “Main-Bottom”, and any number of “Blocks” provided in folders in the file section below. Blocks are optional.

INSTRUCTIONS:

To ensure that you don't screw up, or worse, - rip the rubber when putting it into the rubber case make sure that you…:

1) Wrap the rubber in a paper sheet cut to size (so the amount of rubber you want the rubber to display doesn't get covered) - for those that have a new rubber, well…guess, but I'd advise you to measure ~15mm from the top. For a tighter fit you can try wrapping it twice.

2) Use Cello tape (or any kind of glossy tape - by that i literally mean any tape with a smooth finish but to be honest masking tape should do too) and apply it around the paper sheet that you cut to size and put around the rubber. This will make sure that the rubber is more easily fitted and doesn't tare in case you use anger and sheer force to try to get it inside the case as I know a lot of you will. ;)

3) Put the rubber (with the paper sheet wrapped around the outside) inside the case from the bottom . - PLEASE NOTE this is/should be a tight fit. In case it isn't or the fit is loose then make sure your printer/slicer settings are optimal for a print like this, that includes: Flow Multiplier/rate, print speed, jerk settings, fan speed etc. 

4) If necessary, put the blocks inside the rubber case from the bottom to push the rubber upwards so every time the rubber gets small you can just add an extra block. Then obviously close it off with the dovetail-looking bottom piece.

For those that wanna know:

I printed this on a Bambu Labs P1P printer with…:

• 15% infill
• Supports, EMPHASIS ON SUPPORTS - only on the “Main-Top” piece so overhangs are printed correctly 
• With a Brim around the “Main-Top”
• Layer Height of 0.2mm but I'd advise using variable layer height on the “Main-Top” and “Main-Bottom” pieces to slice it correctly so the designed tolerances are the same as the printed ones for a better fit 
• Oh and just so you know I used eSun PLA+ when printing this just for the extra durability but I don't see why it shouldn't work on PLA from other brands.
• Outer perimeter print speed 100mm/s

However, unless you live under a rock, you can print this with practically any 3d printer.

One last thing:

This is one of my first designs aimed at a larger target audience so please consider that this product might not be a perfect fit for your rubber. The one i did test is the 13 x 23 rubber which gives a pretty snug fit and the others are yet to be tested, but as far as I know it should work just as well, if not let me know I might be bothered to change it…or not, that's what communities are for. :)

Thank you and remember, any review is a good review. Leave a like if you think this product is worth it. :D

And for those select few that realised that the picture I used to show the “Short” variant of the eraser case was not the same as the one in the 3d print files…well that's because I didn't want to print it again after having to minimally change the design.