Would you not be better off holding the drill on the other side ? so the belt is running in the opposite direction to the spin of the drill ,be a lot quicker . And this isn't very precise is it ,can you not use a Lathe ?
Hello, thank you so much for posting this. Some people like to hide knowledge and keep it for themselves. It is great that you are man enough to share you personal experience and knowledge. Just a couple questions if you dont mind, what is the grit sand paper you are using on the belt grinder? Also, are you running the Bosch revolution towards the sand paper on the belt grinder or away? Meaning is the the Bosch going clockwise and the grinder counter clock wise....if you get my meaning. Thanks again, this is terrific information and I do appreciate your sharing. Alan
Why would you do this. Ive watched all. 4 vids and you dont answere questions. I gather it smooths the action and gives more compresion. That to me means more power. Wouldnt that take you in to FAC law. I think you need to explain why and what for to novices like myself.
When you turn the delrin rings, how do they fall in to the grooves, do you cut them so you can fit them as delrin is quite a hard plastic , a bit like nylon with no give in it
John Williams do you have access to a lathe and plastic? Measure the depth of your cut on the piston. Make about 6mm from the end of the piston. I make it roughly around 2/3s of the piston body thickness. This takes a bit of trial and error. Make the cut around 6mm in from the tail. The "plastic " you use make the first bearing , make the bearing hole the depth of the piston groove. Say the piston is 30mm diameter (A hw80) The piston is 3mm thick. Your cut in the tail is 2mm deep. The internal diameter of the bearing will be 28mm. Leave the o/s diameter. With your 28mm bearing , boil a cup of water and put it in it . It give It a little stretch. Try and put the bearing over the piston. It should be a struggle Then it will literally snap into place and shrink.if it fails Then try with a 28.10mm then a 28.15mm one will fit like an elastic band. When you find a perfect fit. Put on the lathe and skim it Like the video of this makes sence
I am a turner by trade but haven't been near one for 16 years, I am hoping to be able to jump on one in a shop that I am still on good terms with the owners. I swore that I wouldn't get back on a duckboard again but I still have all my tooling,mics etc and miss being able to make things.Thanks for your advice, I have never used delrin, I know there is a fair bit of give in ptfe but I think that would probably be too soft for the bearings. Also, why don't you turn off instead of sanding off the raised section of the piston?
If you had access to carbide tipped tools even if hardened I would have thought it would be able to be machined but if you only had HSS then your method would be the obvious choice. If I can't get access to a lathe do you offer this service yourself and if so what would you charge
