Author Topic: Boiler Testing Season...  (Read 80 times)

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Offline cabbage

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Boiler Testing Season...
« on: January 11, 2018, 10:42:49 AM »
Being the newest and youngest boiler tester for the G3S I would like to know what size and thread holes people are using to plug into the locos. I know that I will need to make adaptors, (I mainly use ME1/4 32tpi), to connect to my test equipment. Thus I will need to order taps and dies to suit foreign equipment.

So, what sizes and threads are common?

regards

ralph

Offline Andy B

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Re: Boiler Testing Season...
« Reply #1 on: January 11, 2018, 01:15:29 PM »
Ralph,
I have a good collection of 26, 32 & 40 tpi taps & dies in a variety of diameters.
You are welcome to borrow them to make up a set of adapters.

I'll have to check what size my loco's fittings are.

Andy

Offline cabbage

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Re: Boiler Testing Season...
« Reply #2 on: January 11, 2018, 02:18:05 PM »
Great!

Once I know what sizes I can feed 1/4" brass bar into my lathe to make metre long lengths of 32TPI rod with!

regards

ralph

Offline Baggo

  • Posts: 60
Re: Boiler Testing Season...
« Reply #3 on: January 11, 2018, 04:44:00 PM »
Ralph,

As a boiler tester for the N25GA and my local ME club, I find 1/4 x 40 to be the most common size that I use. This fits a lot of the bushes that builders use for water gauges, clacks, blowdown valves etc.

As time goes on you gradually collect an assortment of other sizes as you can guarantee that you will need some odd size that you don't have!

John
Member of North West Leicestershire SME
Secretary National 2½" Gauge Association