 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
| HomeDiscussion Groups General ModelsRailroadsRocketsRadio Controlled Air ModelsHelicoptersLand ModelsWater ModelsModelGeeks.com Contact UsLink To UsSearch & Site Map |
Model Forum / General / Models / October 2006Getting aluminium out of fine pitch tap
Hi I got some aluminium smeared in a few threads of a good quality tap - its small - 4mm x 0.7 so I cannot pick it out. Any suggestions ? Thanks Tim > I got some aluminium smeared in a few threads of a good quality tap - > its small - 4mm x 0.7 so I cannot pick it out. NaOH or Fe3Cl. The later being not so nasty (except the nice tint on your skin). Nick  SignatureThe modular DRO <http://www.yadro.de> Engine models <http://www.motor-manufaktur.de> >> I got some aluminium smeared in a few threads of a good quality tap - >> its small - 4mm x 0.7 so I cannot pick it out. > > NaOH or Fe3Cl. The later being not so nasty (except the nice tint on > your skin). NaOH is probably better - FeCl3 will (albeit slowly) etch steel, NaOH won't. SignaturePeter Fairbrother > FeCl3 will (albeit slowly) etch steel Yes? Did that recently and had no problems. But it didn't take much time (some minutes) to get the aluminium-smear off (piston ring, the cylinder doesn't count because it was Nikasil coated). But the "official version" is with NaOH. Nick SignatureThe modular DRO <http://www.yadro.de> Engine models <http://www.motor-manufaktur.de> >> FeCl3 will (albeit slowly) etch steel > > Yes? Did that recently and had no problems. But it didn't take much time > (some minutes) to get the aluminium-smear off (piston ring, the cylinder > doesn't count because it was Nikasil coated). It's pretty slow, especially when cold - but people etch stainless with FeCl3 at 50 C. It's not hugely important in either case, especially if eg you don't leave it overnight - but if you did that with FeCl3 you might not have any threads left, whereas if you did it with NaOH it wouldn't matter - for the steel, NaOH is safer. SignaturePeter Fairbrother > Hi > [quoted text clipped - 5 lines] > Thanks > Tim Cheap ultrasonic bath might do it in water. I'm just cleaning a small oil filter in one now. Joules > Hi > [quoted text clipped - 5 lines] > Thanks > Tim Caustic soda eats aluminiuminimum SignatureBigEgg Hack to size. Hammer to fit. Weld to join. Grind to shape. Paint to cover. http://www.workshop-projects.com - Plans and free books - *Now with forum* > Hi > [quoted text clipped - 5 lines] > Thanks > Tim Oven cleaner. Tom SignaturePosted via a free Usenet account from http://www.teranews.com >> Hi >> [quoted text clipped - 9 lines] > >Tom ...Most of which contain NaOH or something similar. David SignatureDavid Littlewood > >> Hi > >> [quoted text clipped - 15 lines] > -- > David Littlewood Maybe that was why I suggested it, perhaps.. Tom SignaturePosted via a free Usenet account from http://www.teranews.com Thanks to all for the suggestion. It took me a while to get around to it but the caustic soda worked well. Thanks Tim > Thanks to all for the suggestion. > It took me a while to get around to it but the caustic soda worked > well. Could someone explain, in small words please, why you couldn't file a groove inside a 4mm nut and screw it on - like a die? > Could someone explain, in small words please, why you couldn't file a > groove inside a 4mm nut and screw it on - like a die? I did not try this because some alumnium swarf got stuck in the threads while I was backing the tap out. No parafin (kerosen ?) or working it up or down in small increments would help so I decided to just back it out - I did without incident but it did strip all the threads (of the part)on the way out. I reasoned that if the tap thread was jammed enough to strip the aluminium thread in the part than there was a good chance that it would break if I tried using a nut to clean it. Also the aluminium in the tap was smoothy formed into the tread with no definate shoulder so I think the nut thread would ride up onto it and jam without disloging the swarf. Tim tap a new thread in brass or syeel this will remove ali from threads MB -- malbenbu |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.