Results 1 to 11 of 11

Thread: Tapping/Re-threading service required in Adelaide

  1. #1
    Caffeine Junky
    Join Date
    May 2009
    Posts
    1,103

    Tapping/Re-threading service required in Adelaide

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi apologies if this is in the wrong category but wasnít sure where to place it.

    I am currently restoring an old coffee machine. A couple of the bolts were badly rusted and snapped when trying to unscrew. I need 2 holes drilled & re-threaded where the old bolds are stuck in the thread. I have a tap & die set but really donít want to risk doing a second-rate job of it.

    Can anyone recommend an honest machinist/metal engineering workshop in Adelaide that would do a small job like this?

  2. #2
    Senior Member
    Join Date
    Aug 2007
    Posts
    440

    Re: Tapping/Re-threading service required in Adelaide

    Can you drill into them and get one of those tools to get it out? That would be the ideal thing to do or is the female part of the thread knackered?

  3. #3
    A_M
    A_M is offline
    Guest
    Join Date
    Mar 2006
    Posts
    6,381

    Re: Tapping/Re-threading service required in Adelaide

    Quote Originally Posted by 4C7375726F685944697F6A63060 link=1302052758/1#1 date=1302066886
    Can you drill into them and get one of those tools to get it out?* That would be the ideal thing to do or is the female part of the thread knackered?
    Called an "easy out" and BE careful. Ya break one of these and you in the poo poo.

    Quote Originally Posted by 6C6D67746A6F75060 link=1302052758/0#0 date=1302052758
    I need 2 holes drilled & re-threaded where the old bolds are stuck in the thread.*
    What size was the bolt / screw ? There are many ways but it depends on size / how flush / how long you have soaked AND can you manoeuvre the item with ease ?

  4. #4
    Caffeine Junky
    Join Date
    May 2009
    Posts
    1,103

    Re: Tapping/Re-threading service required in Adelaide

    Thanks for the responses guys.* I tried one of the easy out tools but without any luck.

    The bolts are 6mm and I have so far drilled into one of the bolts with a 5mm drill bit (incrementally starting with smaller bits), which by skill or luck seems to be nice and straight.

    I started trying to tap a new thread which appears to work ok with bolts of the same thread.* I only got about 5mm in before getting nervous and deciding perhaps I should leave it to someone with greater expertise & equipment. I figure if I stuff it up I may end up with a useless hunk of chromed metal.

    I guess if I did stuff it up I could always bore a larger size thread, there appears to be plenty of metal to work with around the bore.

    Perhaps when posting this thread I was hoping thered be a kind souled coffeesnob out there who also happens to be a metal engineer* ;D


  5. #5
    Senior Member Koffee_Kosmo's Avatar
    Join Date
    Apr 2008
    Location
    Brisbane
    Posts
    5,113

    Re: Tapping/Re-threading service required in Adelaide

    Sometimes its also difficult for professionals
    They also use where appropriate, some heat in the surrounding metal to expand prior to extracting

    KK

  6. #6
    A_M
    A_M is offline
    Guest
    Join Date
    Mar 2006
    Posts
    6,381

    Re: Tapping/Re-threading service required in Adelaide

    Quote Originally Posted by 3A3B31223C3923500 link=1302052758/3#3 date=1302072451
    erhaps when posting this thread I was hoping thered be a kind souled coffeesnob out there who also happens to be a metal engineer*
    What, and live in SA.* Now that I would like to see* ;D


    If you can, as you going into a blind hole ?

    Make sure you start with the the taper tap, to be followed by an intermediate* tap and then a bottoming tap to finish the job.*

    Use lube (so many do not) and take it slow and steady.* It is about the journey, not a rush to the end. Also make sure you can flush / clean the work area.

    Opps...* Must stay OT.

    AND as you say you do have plan B* ;)

    Post a pic as you have us all interested now* ;D

  7. #7
    Member
    Join Date
    Nov 2008
    Posts
    42

    Re: Tapping/Re-threading service required in Adelaide

    If you stuff it up and strip the thread, you could consider inserting a helicoil. (Usage example: http://coolercasesuk.co.uk/showthread.php?t=1211 )* Admittedly installation involves drilling and tapping too, but in this scenario you would keep the original 6mm bolt diameter after the job is done. :)

  8. #8
    Caffeine Junky
    Join Date
    May 2009
    Posts
    1,103

    Re: Tapping/Re-threading service required in Adelaide

    Thanks hangdog thats very handy to know.

    I eventually managed to tap & rethread myself. Tapping into brass is not that difficult, as I discovered.

    Am just waiting on some spare parts before I put it all together and fingers crossed!

  9. #9
    Senior Member Coffee2Di4's Avatar
    Join Date
    Sep 2008
    Location
    Ipswich, QLD
    Posts
    1,472

    Re: Tapping/Re-threading service required in Adelaide

    Damn, disappointed reigns - I was going to offer my services as a Tapper (of the dancing kind, that is! ;D )

  10. #10
    Member
    Join Date
    Aug 2010
    Posts
    55

    Re: Tapping/Re-threading service required in Adelaide

    I know this is an old thread, but if you need someone to retap a thread, no matter HOW obscure, go find a music-repair guy who specialises in old instruments.

    In Adelaide, the only guy to see is Simon at Presto musical repairs. He did my naked portafilter for my 70s Europiccola too. Ive known him for about 11 years, and even worked for him for a while, and you can trust him with anything. Hope this info helps someone out...

  11. #11
    KJM
    KJM is offline
    Senior Member
    Join Date
    May 2007
    Posts
    688

    Re: Tapping/Re-threading service required in Adelaide

    Behmor Brazen - $249 - Free Freight
    Just to chuck in my $0.02 here. IMHO the absolute best thing to use when you have a snapped off bolt/stud and need to extract it is a drill bit.

    A left hand drill bit. Regrettably, not something you get at the local hardware, but often the drill itself spins out the remaining bolt once youre into it a fair way. Also regrettable is the fact that my drill press doesnt do backwards - so I have to hand drill. Still, hasnt let me down yet!

    /Kevin



Similar Threads

  1. Service required for Rancilio S26
    By Steve_D in forum Brewing Equipment - Pointy End ($1500-$3000)
    Replies: 1
    Last Post: 10th February 2010, 01:40 PM
  2. Rancilio service in Adelaide, any ideas?
    By coobs in forum Brewing Equipment (non-machine specific)
    Replies: 3
    Last Post: 25th November 2008, 10:41 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •