myke pocock
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| posted on 11/4/21 at 04:28 PM |
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Making a trigger wheel
I am converting my Skoda Estelle engine to electronic ignition and am making the trigger wheel. It is 125 mm in diameter. My plan was to drill 36
holes in the correct position and then skim the disc on my lathe to size. Does that sound OK in that will the holes, when skimmed down be sufficiently
deep and for that size of wheel what size drill should I use?. Hope that all sounds OK and not to dim!!
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gremlin1234
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| posted on 11/4/21 at 04:55 PM |
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I thought trigger wheels had one blank space, so you would only want 35, each spaced 10 degrees apart, and then the one blank
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r1_pete
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| posted on 11/4/21 at 05:33 PM |
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For the drill size calculate the circumference of the finished wheel, and divide by 72.
It would work, but you'll be spending as much time grinding lathe tools as machining.
Is it worth it when you can buy trigger wheels sub £30?
I like making my own stuff but wouldn't entertain this....
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coyoteboy
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| posted on 11/4/21 at 09:36 PM |
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You don't need much in the way of tooth depth.
Your teeth don't need to be equal width to the gap, it's the vertical edge of the metal that generates the signal, so you just don't
want rampy teeth.
Doing it with a lathe and drills seems like a fair old faff I must admit, but fun if you like tinkering.
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JAG
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| posted on 12/4/21 at 09:29 AM |
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Try these guys?
http://trigger-wheels.com/store/index.html
Justin
Who is this super hero? Sarge? ...No.
Rosemary, the telephone operator? ...No.
Penry, the mild-mannered janitor? ...Could be!
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myke pocock
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| posted on 12/4/21 at 10:48 AM |
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Thanks for the replies folks. I like to make so will go that route besides I can match it as I want to the Skoda crank pulley. The face of that will
need skimming anyway so I will also machine it so the ring fits in a rebate.
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JAG
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| posted on 12/4/21 at 12:22 PM |
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Myke - absolutely. If that's what you like to do then enjoy the making process. Your method sounds relatively simple and should produce a
'wheel' that works (as far as I know anyway!)
However it is worth checking the TriggerWheels site just for reference images etc...
Justin
Who is this super hero? Sarge? ...No.
Rosemary, the telephone operator? ...No.
Penry, the mild-mannered janitor? ...Could be!
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MikeRJ
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| posted on 12/4/21 at 12:37 PM |
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quote:
Originally posted by gremlin1234
I thought trigger wheels had one blank space, so you would only want 35, each spaced 10 degrees apart, and then the one blank
He'd need 34 regular sized holes, and then a slot with a length of 3 holes, assuming the metal between the holes is the same as the hole
diameter. The "blank" is normally a missing tooth which would be equivalent to an extra hole joined to the holes either side of it in
this case.
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Bigheppy
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| posted on 12/4/21 at 03:49 PM |
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Wrong link can't find the one I was looking for sorry
[Edited on 12/4/21 by Bigheppy]
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snapper
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| posted on 12/4/21 at 08:41 PM |
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Search Trigger wheel diagram on this forum, I’ve seen one which shows the radius required for the trigger wheel
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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