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Nope, ok here. Stu G

Ian wrote.....If the drill self feeds it breaker its grip with the taper and slips....... This only happens if the forces are excessive. The depth of cut on each lip will be less than 8 thou. The rate

Sulphate... shmulphate. You guys are so far over my head here I can't even participate. I do believe I've learned something here though, thanks for that. Given what I've read though, I think I'd opt

No, I just downloaded 2 DOC files and watched a MOV of the Adj. Backplate. :) However, are we back to duplicate posts again? Some look very familiar. 8-|

Hello Folks, To be pedantic, I think that the sterilising stuff is sodium metabisulphite (Na2 S2 O5), rather than metabisulphate, but I don't suppose that would make any practical difference. I might

G'day Ellis Drilling from the tail stock is OK but the drill or chuck is held by a taper. If the drill self feeds it breaker its grip with the taper and slips. An exercise in futility. You have to

Roy wrote.....The practical problem is controlling the feed of a large drill enlarging a hole; they tend to self feed at their spiral rate.......... I believe this is only true with lever operated

Anyone else having problems trying to download files in the files section?

Thankee Sir! Will head down there tomorrow, I only have a little of that left in the homebrew supplies. Time to stock up for another batch anyway. Unfortunately too late in the year to lager another

Reaming it provides a smooth bore & ensures it's actually as big as it claims to be. Roy wrote:

The practical problem is controlling the feed of a large drill enlarging a hole; they tend to self feed at their spiral rate. It's easier to control a reamer's feed. Roy hole, a drill would do just as

wrote: Hi Vikki, Well, I didn't mention that when I sat my last chemistry exam I burnt all my lecture notes BEFORE the results came back. No way I was repeating that subject even if they did let me

Yup! That's the same sodium bisulphate as the pH down product for pools/spas. It's quicker than alum (any of the common variants) & easy to get. Roy wrote: the they productid=285&cat=0&page=1

Ian, Am no chemist but have used Sodium Bisulphate (meta too I think) for broken drills etc in gold, silver, and aluminium. For aluminium somewhat dilute nitric would be faster but much harder to

Found this at my local homebrew store: http://www.cellar-homebrew.com/store/product.php?productid=285&cat=0&page=1 Would that work? Convenient place to get to (something special in Seattle) and I do

G'day Jeff, Andy, et al. I'm not quite sure by your comments whether you have used Sodium Bisulphate to extract broken taps. If you have then that substantiates my assessment that it is the sulphate

Ian, For some more info to confuse the chemistry freaks... the jewellery pickle is labelled " Sodium Bisulfate". The PH down might be a 'sodium meta bisulfate' but it is reported to be a cleaner (and

G'day Andy, Perhaps you could do a few extra-curricular experiments. Drill a hole in pieces of aluminium and then drive steel screws into into each then. No need to thread the hole. Not quite the same

Thanks, Ian. My chemistry stopped with school "A-level" (the exams that qualify you for uni). We had opportunities for extra-curricular experiments making gun-cotton, benzedrine etc. Much more

Hi Jeff, What a neat idea. After the work's been buggered I can save the tap to present to the tool store as evidence! Yeah, Ian sorted me out on that. But I'm still not repeating CHEM- 101. <G> John