ER32 Chuck Problem

  1. slim_boy_fat

    slim_boy_fat Forum Supporter

    Well, news from Numpty Corner :ashamed:. I've no problem fitting/removing those collets which have obviously been used before, but the new/unused ones in the lot I bought are proving unwilling to fit easily. [hangs head in shame :doh:]
     
    ukracer likes this.
  2. fizzy Member

    Messages:
    6,358
    uk
    Perhaps there are burrs on them or bits of swarf? Perhaps a bit of emery cloth will ease things into place.
     
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  3. slim_boy_fat

    slim_boy_fat Forum Supporter

    One other thing, the chuck is advertised as taking a 10mm drawbar and I thought I'd have a go at making one. But, when I tried to screw a length of 10mm threaded rod into the end, it only caught for a few threads and wouldn't go any further without 'excess persuasion'.

    What am I missing here? :dontknow:
     
  4. MattH

    MattH Member

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    3,891
    Location:
    Bristol
    Fine, normal, course M10?
     
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  5. fizzy Member

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    6,358
    uk
    Mine is M12 as it is an MT3. I bought some 12mm threaded rod from screwfix and it fitted very nicely. Only trouble is just a fraction too short!

    Perhaps you need a different piece of m10?
     
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  6. slim_boy_fat

    slim_boy_fat Forum Supporter

    The thread in the collet chuck looks to be fine pitch, I'll need to check the thread on the bar using my gauge. What is the 'normal' tpi on 'ordinary' threaded bar?

    EDIT: I'm thinking this might be the stuff I need? [without going out to the shed to measure my present stuff, which was just lying about :ashamed:]

    https://www.ebay.co.uk/itm/8mm-10mm...hash=item41ee64cb41:m:maANTudauHAAW0EL4aQrEoQ
     
  7. doubleboost

    doubleboost Member

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    2,983
    Location:
    Newcastle upon Tyne England
    7/16 UNF is the normal draw bar thread​
     
  8. fizzy Member

    Messages:
    6,358
    uk
    Not on Chinese collet chucks!
     
  9. doubleboost

    doubleboost Member

    Messages:
    2,983
    Location:
    Newcastle upon Tyne England
    All 3 of mine are UNF
     
  10. addjunkie

    addjunkie Member

    Messages:
    6,041
    Location:
    Northumberland. Reet oot in the sticks
    Mine are a selection, I have 7/16 unf, an m12 and an m10. The metrics are all standard threads, not fine.
     
  11. ukracer Forum Supporter

    I dont need pics. Lol
     
  12. slim_boy_fat

    slim_boy_fat Forum Supporter

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