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  1. #1
    Registered User f.webster's Avatar
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    Default Howard Miller (Hermle 340-020A) Wrench?

    I have a Howard Miller clock that I am repairing. It needs bushing work and so I need to seperate the plates. What has stopped me is the removal of the locking plate and the chime locking cam. They are held in place with what I thought was a hex nut. I have search for a hex wrench to fit and have had no luck. Then I thought it might be a star(?); yet, still no luck.

    Then I was told by a guy in a little hardware store that if it is a Howard Miller Hermle movement it takes a 'special' tool.

    Is this true? If so, where do I get this 'special' tool?

  2. #2

    Default Re: Howard Miller (Hermle 340-020A) Wrench? (RE: f.webster)

    I think you mean that they are held by socket set screws and you need a hex key, commonly called an Allen wrench. I don't know the size off hand, but they are metric and only a metric wrench will fit.

    If I have misunderstood completely, please accept my apologies and post a picture of what you are trying to remove.

    Joe

  3. #3
    Registered User f.webster's Avatar
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    Default Re: Howard Miller (Hermle 340-020A) Wrench? (RE: Joe D.)

    Joe,

    You are right. I do mean allen wrench. I have searched for a metric allen wrench and those that I found were either too big or too small.

    Help!?! Is there a special size?

    Thanks

  4. #4

    Default Re: Howard Miller (Hermle 340-020A) Wrench? (RE: f.webster)

    Sorry, I don't have one to check the size right now, but I don't think it's anything special. Hopefully someone else will chime in.

    Joe

  5. #5

    Default Re: Howard Miller (Hermle 340-020A) Wrench? (RE: Joe D.)

    Probably unlikely that Hermle would be manufacturing off-size Allen screws. Something normal in either metric or American ought to fit.

    Unless it's Torx, rather than Allen.

    bangster
    1. Check out the Clock Parts Wanted forum. You may be able to help someone!

  6. #6

    Default Re: Howard Miller (Hermle 340-020A) Wrench? (RE: bangster)

    It is a 1.3mm size. We have the allen wrench for it. Also fits the hermle moon gears. $1 each flate rate mailing of $2.

  7. #7

    Default Re: Howard Miller (Hermle 340-020A) Wrench? (RE: MARK A. BUTTERWORTH)

    Mark's number is 563-263-6759

  8. #8
    Registered User Scottie-TX's Avatar
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    Default Re: Howard Miller (Hermle 340-020A) Wrench? (RE: shutterbug)

    I know it's not good to recommend the wrong tool for the job and I would buy a metric assortment but:
    I have had success removing cap screws by grasping them with a pair of pliers or inserting a tight fitting screwdriver into the hex.
    Works in a pinch.

  9. #9
    Registered user. Jay Fortner's Avatar
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    Default Re: Howard Miller (Hermle 340-020A) Wrench? (RE: Scottie-TX)

    Industrial suppliers sell small allen screwdrivers in sets both metric and SAE. I've got one of each and wouldn't part with them for love nor money.
    -> posts merged by system <-
    Quote Originally Posted by Scottie-TX View Post
    I know it's not good to recommend the wrong tool for the job and I would buy a metric assortment but:
    I have had success removing cap screws by grasping them with a pair of pliers or inserting a tight fitting screwdriver into the hex.
    Works in a pinch.
    Hey man, I think your latest avatar cat is allergic to himself.
    Gun control is the ability to hit the target.

    http://rosewoodregulators.com/

  10. #10
    Registered User f.webster's Avatar
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    Default Re: Howard Miller (Hermle 340-020A) Wrench? (RE: Jay Fortner)

    Thanks Mark for the information.

    1.3mm allen wrench is the right tool.

  11. #11
    Registered User Scottie-TX's Avatar
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    Default Re: Howard Miller (Hermle 340-020A) Wrench? (RE: f.webster)

    Yeah; Self inflicted - cat scratch fever.

  12. #12

    Default Re: Howard Miller (Hermle 340-020A) Wrench? (RE: Scottie-TX)

    For what it's worth: This same allen wrench is also used and included with a Bergeon reamer adapter for an electric screwdriver, part #22911, Timesavers Catalogue #36, page 111, which I have, AND have lost a time or two much to my chagrin. Good to know you have some Mark. I'll be calling you soon!................doc

    Post Script: It is also used on part #'s 22910 and 22912 in the Timesavers catalogue.
    http://clocksandwatchesrestoration.blogspot.com

    Exodus 31:6 "...and I have given to all able men ability, that they may make all that I have commanded you."

  13. #13

    Default Re: Howard Miller (Hermle 340-020A) Wrench? (RE: doc_fields)

    Quote Originally Posted by doc_fields View Post
    For what it's worth: This same allen wrench is also used and included with a Bergeon reamer adapter for an electric screwdriver, part #22911, Timesavers Catalogue #36, page 111, which I have, AND have lost a time or two much to my chagrin. Good to know you have some Mark. I'll be calling you soon!................doc
    Mine came with a screw Maybe it's been modified recently.

  14. #14

    Default Re: Howard Miller (Hermle 340-020A) Wrench? (RE: shutterbug)

    I know this thread is old but it seemed to fit. I was looking for the hex tool to remove the Chime Locking Plate (cam) on a Howard Miller 341-020A movement. I bought a 1.3 mm hex tool but it is too small. Still looking for the right size. I am assuming it's metric. I will keep trying and post if I can find it. Any additional suggestions are welcome.

  15. #15

    Default Re: Howard Miller (Hermle 340-020A) Wrench? (RE: John Rausch)

    1.5 mm works. Also I have a .050" square that fits the moon gear and several other things too.
    A man with a clock always knows the time. A man with two clocks is never sure.

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