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    https://www.youtube.com/watch?v=OjFwcsSU0oc&t=293s

    https://www.youtube.com/watch?v=OjFwcsSU0oc&t=293s
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    The Australian cast steel tank never saw real...

    The Australian cast steel tank never saw real action, but I think did appear in a movie.
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    I guess that's possible if a suitable ratio...

    I guess that's possible if a suitable ratio speedo gearbox could be found.
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    Yesterday I posted a message replying to some...

    Yesterday I posted a message replying to some questions.
    It has mysteriously disappeared today, but anyway the gist is that I'd prefer to keep the original speedo.
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    I appreciate all suggestions, thank you folks. I...

    I appreciate all suggestions, thank you folks.
    I will see what I can do.
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    That's the type that gets chewed out when used on...

    That's the type that gets chewed out when used on my bike.
    It's for the standard type brakes, not the 4 leading shoe I have, unfortunately.

    I know that website, and other Ducati forums.
    Alas,...
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    That website caters for more modern Ducatis. I...

    That website caters for more modern Ducatis.
    I did put feelers out amongst fans of older Ducatis - no response.
    It doesn't help that my brake is very rare, with a factory modification to 4 leading...
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    A self-contained gearbox like this would not...

    A self-contained gearbox like this would not work, because it is a double sided brake with 4 shoes (2 each side).
    The gearbox would only work if one side is rotating with the wheel, which is normal...
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    There are a few there with 11 teeth, and they may...

    There are a few there with 11 teeth, and they may well be 12mm OD.
    Maybe there's one with the correct helix angle, maybe not.
    It could cost a fair bit to try, with no guarantee of success....
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    Unfortunately I don't think it's so simple. The...

    Unfortunately I don't think it's so simple.
    The driven gear shaft needs to be a specific angle coming out of the brake backing plate, and there could be many different helix angles for the same...
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    I want a speedo.

    I want a speedo.
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    It's a 350, almost identical to look at. I...

    It's a 350, almost identical to look at.

    I used to think the Ducati 50cc pullrod 4 stroke bicycle motor was the ultimate of its type, until I learnt about the Bugatti effort.
    It has twin overhead...
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    That's right, I've seen that too, now that you...

    That's right, I've seen that too, now that you mention it.
    It could be another solution to try.
    Getting the software right could be a challenge though?
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    Thanks, it's a modified 1974 model, originally a...

    Thanks, it's a modified 1974 model, originally a 350 trail bike.
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    Another photo shows the more usual type of brake,...

    Another photo shows the more usual type of brake, which has one lever on the brake plate.
    Mine has two levers with a linking rod, which is an obstruction that requires the speedo cable to exit at a...
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    Due to the popular demand of one, here's some...

    Due to the popular demand of one, here's some pics.
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    Can you do metric module gears? It's on an...

    Can you do metric module gears? It's on an Italian bike.
    They can't be straight because the pair of mating gears aren't on parallel shafts.
    Rather, they are skewed so the speedo cable exits at an...
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    Wow, it's been a rapid exchange of messages, and...

    Wow, it's been a rapid exchange of messages, and it sounds like I might have a couple of possible helpers after all.

    I will try to get the module, PA and helix info to progress the project!
    ...
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    I don't know, but I haven't seen anything...

    I don't know, but I haven't seen anything convincing about affordable 3D printing of metal parts.
    Maybe there's an existing gear out there, but there are so many variables the chances of identifying...
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    It has shoulder each end, as seen in the photo....

    It has shoulder each end, as seen in the photo. The overall length is 22mm, the toothed part is 14mm long.
    OD=12mm, and it's pressed onto a 6mm shaft.
    It has 11 teeth.
    The gear in the photo does...
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    Right, now I'm getting an idea of the cost. It's...

    Right, now I'm getting an idea of the cost. It's not justifiable, sadly.
    There's no real market for this gear so no chance to amortise the cost with some sales to others.
    Thank you and others for...
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    I think I could work out the PA and helix, other...

    I think I could work out the PA and helix, other specs are easy.

    Assuming all parameters can be supplied, what do you estimate the cost to be?
    - for machining only, or including hardening if...
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    It's a speedo drive gear so not subjected to...

    It's a speedo drive gear so not subjected to great loads I think, but some degree of hardness is probably good.
    Is that really expensive to get done?
    I'm thinking some oil hardening steel could be...
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    Yes but I linked a short video to illustrate...

    Yes but I linked a short video to illustrate briefly what is required.

    Do you have a universal mill?
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    A big company could charge a hefty price....

    A big company could charge a hefty price.
    Someone with an horizontal mill with a geared dividing head setup could do it.
    I don't have such. I'd be happy to talk to anyone who could take it on as a...
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    Is it one of ebay cheapies?

    Is it one of ebay cheapies?
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    Helical gear maker?

    I want a small helical gear to fit a speedometer drive gearbox on a motorbike.
    Is there some place that does this work?
    It probably needs to be hardened too.
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    Search: 6" ring light...

    Search: 6" ring light
    https://www.ebay.com.au/itm/393313388488?hash=item5b934e07c8:g:UUwAAOSwHd5gm3WB
  29. Steel wool and elbow grease?

    Steel wool and elbow grease?
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    I read it in a few different places, that...

    I read it in a few different places, that grinding a centre punch should be such that any grooves (tiny but there) should be towards the conical tip.
    I thinks it's to minimise the effect of any...
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    Note that grinding should be parallel to the axis...

    Note that grinding should be parallel to the axis of the punch, not across it.
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    The heavier the chuck, the heftier an impact...

    The heavier the chuck, the heftier an impact driver would need to be.

    A last ditch method that I've used a couple of times sounds savage, but worked out well:

    Place a sturdy board across the...
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    Sticky: UNF was based on Sellers thread, devised in the...

    UNF was based on Sellers thread, devised in the 1860s.
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    Get a grip. 392066

    Get a grip.

    392066
  35. Could it be 316 you bought - a type of stainless...

    Could it be 316 you bought - a type of stainless steel?
    It's more difficult to machine than mild steel or leaded steel.

    Some info: https://geospacemfg.com/blog/machining-304-316-stainless-steel/...
  36. If you're using carbide toolbits, try HSS for...

    If you're using carbide toolbits, try HSS for better finish. Have a keen edge on a rounded point, slow speed, fine feed. Maybe use coolant.
    A single cut lathe file (I bought one from USA) is good...
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    Well done BC. If you scan it, you can undercut...

    Well done BC.
    If you scan it, you can undercut Ozark and make a killing!
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    That would be welding to the cable wire? I'd be...

    That would be welding to the cable wire?
    I'd be concerned that the very high temperature could detrimentally change features of the wire metal.
    Mind you, I don't know a thing about working with...
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    Would you accept a proper nipple? That nut...

    Would you accept a proper nipple? That nut arrangement doesn't look too convincing.
    Just give a diameter, from the holes on the caliper.
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    Cable wire is pretty hard stuff, and filing it...

    Cable wire is pretty hard stuff, and filing it could be difficult.
    Better to grind it.
    But heat build up can be enough to melt solder.
    Have water nearby so you can dip the cable end in it...
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    The photos of the Peugeot's front brake show that...

    The photos of the Peugeot's front brake show that there is no soldered connection on the main cable.
    Instead, it is clamped to the balance piece, as is often the way on pushbikes.
    That is good news...
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    Like many other owners of old motorbikes, I...

    Like many other owners of old motorbikes, I sometimes need to make cables.
    In the past I used a soldering iron but then found out that a solder pot makes for easier and better jobs.
    Started with a...
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    Any plastic parts on these tools?

    Any plastic parts on these tools?
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    Just in case somebody's thinking of welding...

    Just in case somebody's thinking of welding Duragal, I will report my unhappy experience with that.
    All nice and straight when bought, the 65x65 angle, 5mm thick piece got badly out of shape upon...
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    We need a little more information to be able to...

    We need a little more information to be able to help.

    Do you have a Hercus 9 inch or "260"?

    Does your lathe have a metric or imperial leadscrew?
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    Good score. May the Swarf be with you.

    Good score.
    May the Swarf be with you.
  47. Or an electric "drive by wire" throttle pedal?

    Or an electric "drive by wire" throttle pedal?
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    I thought I might catch someone out. :) Before...

    I thought I might catch someone out. :)

    Before Lorch two Americans named Webster and Whitcomb developed a type of watchmakers' lathe and collet system that became established as the worldwide...
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    Nice one. Those Americans sure know how to...

    Nice one.
    Those Americans sure know how to design machine tools.
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    In a hurry once, I removed a ball race from a...

    In a hurry once, I removed a ball race from a dead-end hole in a light alloy case, by welding a threaded rod to the inner race.
    Then I could pull it out, and no harm done (except to the bearing).
    ...
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