Author Topic: Melted Axle Muffs  (Read 2553 times)

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Lemosteam

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Re: Melted Axle Muffs
« Reply #15 on: November 17, 2020, 09:28:52 PM »
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I've just got my calipers to them and the results are:

Kato: Axle dia 0.97mm, muff length 7.51mm, muff length required to achieve NMRA back-to-back spacing 7.72mm.  It may be best to reduce the diameter of the inside of the muff by say 0.02mm and one could ream or drill to get a perfect fit - that's got to be better than finding 0.97mm is sloppy.

Bachmann: Axle dia 1.17mm, muff length 7.46mm, muff length required to achieve NMRA back-to-back spacing 7.85mm.  The axle has a knurled part which means it's going to end up being a push-fit.

I'm pretty sure these measurements will end up being ok, but if anyone cares to check them I won't be offended :)

Thanks for the measurements. I can have them ready by the weekend. Yes best to finish the hole. Btw, CA works excellent to reassemble.

narrowminded

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Re: Melted Axle Muffs
« Reply #16 on: November 18, 2020, 11:15:20 PM »
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Got to this late but if needed, Delrin muffs could be precisely machined and a few spares made.  I could also log the dimensions for future use. 

With size choices from an assortment of over 200 drills between .006" and .250" diameter, parts like these are pretty easy to machine very accurately.  If this was chosen sample wheels would be preferred to be sure of the dimensions and final fits.  If you would like to pursue this, PM to make arrangements.
Mark G.

Chinapig

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Re: Melted Axle Muffs
« Reply #17 on: November 19, 2020, 03:48:59 AM »
+1
Thanks for the offer, Mark, but it looks like Lemostream has already picked it up.

Ted
Ted

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modeling oNeTrak modules.

Lemosteam

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Re: Melted Axle Muffs
« Reply #18 on: November 19, 2020, 03:34:12 PM »
+2
« Last Edit: November 20, 2020, 06:04:14 AM by Lemosteam »

narrowminded

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Re: Melted Axle Muffs
« Reply #19 on: November 19, 2020, 03:44:45 PM »
+1
Looks like you're good to go, Ted. 8)  Nice John!   :)
Mark G.

Chinapig

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Re: Melted Axle Muffs
« Reply #20 on: November 21, 2020, 05:01:49 AM »
+1
Thanks, John.  Order placed :)

Cheers, Ted
Ted

Member of Gosport Model Railroad Club, England: www.gosportrailroadgroup.org.uk
modeling oNeTrak modules.

Chinapig

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Re: Melted Axle Muffs
« Reply #21 on: November 25, 2020, 04:30:22 PM »
+2
Muffs arrived today, John, and they did the job perfectly.

Many thanks, Ted
Ted

Member of Gosport Model Railroad Club, England: www.gosportrailroadgroup.org.uk
modeling oNeTrak modules.

Lemosteam

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Re: Melted Axle Muffs
« Reply #22 on: November 25, 2020, 06:50:33 PM »
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Excellent!

thomasjmdavis

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Re: Melted Axle Muffs
« Reply #23 on: November 25, 2020, 07:32:42 PM »
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How on earth did you get a 4 day (21 to 25) turn around from Shapeways?  I usually wait 2 weeks and I think best time has been 10 days.
Tom D.

I have a mind like a steel trap...a VERY rusty, old steel trap.

Chinapig

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Re: Melted Axle Muffs
« Reply #24 on: November 26, 2020, 03:53:13 AM »
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Ah!  Must be because I live in England and Shapeways is in the Netherlands :)
Ted

Member of Gosport Model Railroad Club, England: www.gosportrailroadgroup.org.uk
modeling oNeTrak modules.