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Type: Posts; User: Dave S

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  1. Thread: BST repair

    by Dave S
    Replies
    5
    Views
    532

    BST repair

    We have a clock in the kitchen, cheap quartz one, I think from Tesco some years ago.
    Anyway SWMBO likes it, and a couple of months ago the seconds hand stopped - it just hangs at 6 oclock and doesnt...
  2. Replies
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    Cutter holder made, now its time to sort the...

    Cutter holder made, now its time to sort the blank ready for machining.
    Much the same as for the wheels, knock a hole in the middle, mount on the mandrel and true up in the lathe
    ...
  3. Replies
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    In a minor cockup I made the tool from 5/16th...

    In a minor cockup I made the tool from 5/16th HSS. Turns out that the boring bar holder I indented to use it with would work with 1/4", but 5/16 puts the cutting edge in the wrong place.
    *Sigh*...
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    13,486

    Glad people are enjoying it. I find it nice to...

    Glad people are enjoying it.
    I find it nice to share this stuff - my family has got so used to the impossible just taking a little longer than usual that they look bored when I share.
    I really...
  5. Replies
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    With the pinon pressed into the soft collet next...

    With the pinon pressed into the soft collet next thing is to bore it out.
    Very small, light cuts needed, as the grip on the pinon is not very secure.

    After boring to correct the concentricity and...
  6. Replies
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    A long stick of pinion is not much use, so I...

    A long stick of pinion is not much use, so I parted three pinon shaped pieces off it.

    https://i.postimg.cc/GhBVQZpC/IMG-6830.jpg

    Then I could try a rough positioning of the the train. It all...
  7. Replies
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    Been busy laying a hedgerow, so this took a break...

    Been busy laying a hedgerow, so this took a break for a bit, but now thatís done itís time to get on with it.

    I managed to mis-index the pinions whilst trying at few extra things, and as a result...
  8. Replies
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    1,329

    Fine silver is around 960C, alloys are lower....

    Fine silver is around 960C, alloys are lower.
    Silver solders melt between about 500C and 800C

    Dave
  9. Replies
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    Let me make one train first, then maybe I should...

    Let me make one train first, then maybe I should make another and do the research directly...
    Of course that would mean buying the cutters which the whole point was to avoid....

    I'm not sure...
  10. Replies
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    1,562

    Nice. DMLS or binder fired? What metal? ...

    Nice.
    DMLS or binder fired?

    What metal?

    Dave
  11. Replies
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    13,486

    I have Wilds Wheel and Pinion cutting, though...

    I have Wilds Wheel and Pinion cutting, though itís a few years since I read it. Iíll have another look, but IIRC it just makes a statement to the effect of gear trains for clocks are cycloidal, but...
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    Do you have a source for that statement? Dave

    Do you have a source for that statement?
    Dave
  13. Replies
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    There are a few reasons, but mostly it boils down...

    There are a few reasons, but mostly it boils down to being bloody minded and wanting to try something that is not normal ;)
    Whilst traditionally the cycloid tooth form is used I have failed to...
  14. Replies
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    13,486

    Following a lot of reading about aspects of gear...

    Following a lot of reading about aspects of gear manufacture I've started on the Pinions.

    When I get to Watch sized parts I think I might want to make a slightly smaller setup for cutting.
    (Anvil...
  15. Replies
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    Bit more progress, so a quick update. I hacked...

    Bit more progress, so a quick update.
    I hacked out a couple of more wheel blanks, this time for 96 and 90 tooth wheels.

    https://i.postimg.cc/HW9xcN7M/IMG-6122.jpg

    Then bunged them in in the...
  16. Replies
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    2,466

    I have 2 sets of AF ones. Never had a problem...

    I have 2 sets of AF ones. Never had a problem with them that wasnít caused by Me using them inappropriately (I donít just do watches)

    Dave
  17. Replies
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    View Post

    Brendan, Iíll take that as a complement :)
    I have to make a couple of timepieces - one for each child...
    New book on gears on order - these are involute tooth form rather than the traditional...
  18. Replies
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    13,486

    Ive made some wheels. First trepan out some...

    Ive made some wheels.
    First trepan out some blanks, which avoids making loads of swarf just to get a roughly right sized blank.

    https://i.postimg.cc/Dz2M191V/IMG-6046.jpg

    2 cut out without a...
  19. Thread: Hair Springs

    by Dave S
    Replies
    5
    Views
    707

    Size and number of coils depends on the design....

    Size and number of coils depends on the design. The spring is matched to the balance inertia to give the required oscillation frequency, which in turn is decided by the train. The actual length of...
  20. Replies
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    13,486

    Had to make another cutter as the first one is...

    Had to make another cutter as the first one is too short to make a 144 tooth gear.
    I printed out the 144 tooth gear to compare the lengths and clearance with:
    ...
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    3,032

    Pictures would help. But usually pretty similar ...

    Pictures would help.
    But usually pretty similar

    Dave
  22. Replies
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    Assuming you have the back off locate the main...

    Assuming you have the back off locate the main click. Then figure out which screwhead to use to turn the barrel slightly to unclick the click.
    Use a screwdriver on that screw and (usually) a small...
  23. Replies
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    One step closer...

    One day I intend to make a watch.
    Iím still a long way off, but tonight I made a good step in the right direction :)

    A large part of a timepiece is of course the wheels and pinions. Iíve been...
  24. Replies
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    Very small update on this. The balance module...

    Very small update on this.
    The balance module is now installed back in the clock and ticking nicely.

    https://i.postimg.cc/CBgHNYDr/4-A8911-D9-64-EC-4533-9278-5564-AA07-DF74.jpg

    The clock has...
  25. Not that controversial probably but Spitting...

    Not that controversial probably but Spitting Image, Drop the Dead Donkey and The Mary Whitehouse Experience

    Dave
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