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 Post subject: EMD, F-Unit speedometer, need parts, CP-Speed Recorder
PostPosted: Tue Mar 24, 2020 10:51 pm 

Joined: Sun Jun 03, 2012 9:21 am
Posts: 17
I am in need of two gears for a CP-SPEED RECORDER. Numbers on gears are 38-T and 27-T, now that i type that, I think that is most likely the tooth count. Either way, see photos, anyone parting out an old speedometer?
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File comment: Complete Speed recorder
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Attachment:
File comment: location gears go
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Attachment:
File comment: gears needed
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Thanks
Glenn


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 Post subject: Re: EMD, F-Unit speedometer, need parts, CP-Speed Recorder
PostPosted: Wed Mar 25, 2020 7:13 am 

Joined: Tue Aug 24, 2004 6:30 am
Posts: 680
Get them 3D printed or have a machine shop make them in metal.


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 Post subject: Re: EMD, F-Unit speedometer, need parts, CP-Speed Recorder
PostPosted: Wed Mar 25, 2020 8:30 am 

Joined: Sun Jun 03, 2012 9:21 am
Posts: 17
OK, appears when the engine was converted the entire "dashboard" was changed out. We actually have a CF7 and the speedo was changed out during the conversion. Never the less, you see the photos. Does anyone have a locomotive on permanent display with that type of speedo in it? the two gears are behind a cover and would never be missed.


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 Post subject: Re: EMD, F-Unit speedometer, need parts, CP-Speed Recorder
PostPosted: Wed Mar 25, 2020 8:32 am 

Joined: Sun Jun 03, 2012 9:21 am
Posts: 17
k5ahudson wrote:
Get them 3D printed or have a machine shop make them in metal.


Might have to, was hoping for someone to have one setting around that has no plans to ever work again. The gears are inside and would not affect the display value of the unit.


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 Post subject: Re: EMD, F-Unit speedometer, need parts, CP-Speed Recorder
PostPosted: Wed Mar 25, 2020 9:55 am 

Joined: Fri Feb 13, 2015 2:48 pm
Posts: 116
Probably can get them from Boston Gear https://www.bostongear.com/products/open-gearing


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 Post subject: Re: EMD, F-Unit speedometer, need parts, CP-Speed Recorder
PostPosted: Thu Mar 26, 2020 10:08 am 

Joined: Thu Oct 08, 2015 11:54 am
Posts: 718
Location: New Franklin, OH
You’ll need to contract someone to design the new gears in 3D software. Designing gears isn’t very complicated but if done wrong the gears will wear out quickly. Your gears look hefty enough to be printed and last a while. Thicker is sometimes better if there’s room. Nylon would be a good material.

Disclaimer: no expert here but I’ve checked into the possibility of doing gears for something else a couple years ago. Cost? No clue.

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 Post subject: Re: EMD, F-Unit speedometer, need parts, CP-Speed Recorder
PostPosted: Thu Mar 26, 2020 10:08 pm 

Joined: Fri Dec 21, 2012 4:32 pm
Posts: 194
I've seen the antique car guys use 3D printing to make gears and parts. These should be a piece of cake. Just document the surviving parts well!


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