sight glass oiler with MTP threads

[blockmanjohn]

Hi, I am going to need a sight glass oiler for my 1/4 scale Galloway. The one I am looking at has 3/16-40 MTP threads. It sells for around $20.00, and I have no problem with that. The fly in the ointment is that a 3/16-40 MTP tap costs around $40.00,and that is a bit much.

Is there a way to modify the threads on the oiler, maybe by using a standard 3/16-40 die on the threads, so that it will thread into a standard 3/16-40 hole? Will it work without modifying the threads at all? I have never used a taper thread before so this is all new to me.

Does any one know of a source for a similar oiler with standard threads? Thanks in advance, John.

 

[deverett]

Try PM Research.
https://www.pmmodelengines.com/shop/steam/drip-feed-oiler/

I would draw your attention to the Info page about threads
https://www.pmmodelengines.com/model-pipe-threads/
Where they say the tapered threads and straight threads are interchangeable.

Or you could make your own from scratch. An American style 1/4 scale kit can be purchased from M & M for not a lot of money and the drawings will be useful for future projects.
http://morrisonandmarvin.com/order.php

Dave
The Emerald Isle

 

[Jasonb]

Just take it apart and remake the central part with whatever thread you want or why not make the whole oiler, that is what I usually do.

Do your engine drawings not show an oiler, the 1/3rd ones do.

 

[blockmanjohn]

Yes they do, and that is certainly an option.