Brake Calliper Piston Popper

Boost Me

DO NOT USE THIS IF YOU DON'T KNOW WHAT YOU ARE DOING This is an adapter to allow you to use a standard compressor airgun to pop out a piston from a brake calliper.  Assuming you have lost the little rubber tip that came with your airgun, this will give you a snug fit between the airgun nozzle and the banjo bolt hole. Based upon my popular can recharger, this is another model that comes with a warning.  DO NOT USE THIS IF YOU DON'T KNOW WHAT YOU ARE DOING.  The piston may fire out at high speed (use a bit of wood to reduce chances). Brake fluid may spray back out at you and at the end of the day you are playing with car brakes which are kind of important and doing so can be dangerous if you don't know what you are doing so…  DO NOT USE THIS IF YOU DON'T KNOW WHAT YOU ARE DOING.

 

I printed it out in PLA.  I snapped it when I was using it as I was too lazy to put the calliper in a vice when I started but it still worked when snapped anyway (remains screwed out with a carefully jammed in screwdriver).  If you print it in something more robust or flexible and/or secure the calliper before attempting piston removal, you may well not snap your one.  I printed it on end with a small brim as some people found my other similar model fell over during printing.   Will certainly print fine without a brim if you look after your build plate. 

 

Keen to see results, get comments and of course very happy to receive boosts.

 

If you have a compressor and limited sense of self-preservation you may also like my adapter to recharge compressed air cans.  This is also dangerous but useful. https://makerworld.com/en/models/1346255-aerosol-spray-can-charger#profileId-1387811