The Moriya Story -- short form !

[bob shutt]

Two I made

 

[TinkerJim]

They look great, Bob. Very fine authentic job. The shield between the front legs is a good addition.

 

[jlchapman]

TinkerJim, I'm fine on materials.

But I'm wondering if you have some bearing part numbers. From what I read so far, the bearing plate needs bearings and the power crankpin.

I do have a question. On the engine base, you have a .332 dia hole that you drill and tap for 3/8-24. What diameter is the hole that goes all the way to the 1.625 cold end hole?

Thanks, Jerry

 

[TinkerJim]

TinkerJim, I'm fine on materials.

But I'm wondering if you have some bearing part numbers. From what I read so far, the bearing plate needs bearings and the power crankpin.

I do have a question. On the engine base, you have a .332 dia hole that you drill and tap for 3/8-24. What diameter is the hole that goes all the way to the 1.625 cold end hole?

Thanks, Jerry

Inch bearings are hard to find these days. BearingsDirect.com and SDP-SI.com both have 5/16" ID bearings (in assorted ODs) that can be used. ABEC 3 grade bearings are plenty good for the Major. Or you could also go metric with 8mm.

The .332 dia hole goes through to the central hole as the drawing indicates - only the end is tapped for a plug.

Jim

 

[jlchapman]

Hi TinkerJim,

Thanks on where to buy the bearings. They arrived today.

My next question is the flexible leather cup seal. Do you have a good source for the seals?

Any recommendations on the gasket material?

Thanks, Jerry

 

[Steamchick]

Look what I found!

Home | Warpfive Fans |Precision Stirling Engine Stove Fans

Discover the full range Warpfive Fans - Stirling engines Stove Fans & Table Fans. Designed, manufactured and beautifully hand-crafted in the UK.

warpfivefans.com

More fun to make your own though... Must buy the book!
K2

 

[TinkerJim]

Hi TinkerJim,

Thanks on where to buy the bearings. They arrived today.

My next question is the flexible leather cup seal. Do you have a good source for the seals?

Any recommendations on the gasket material?

Thanks, Jerry

The leather cup seal is not a stock item. It was homemade using thin very flexible leather stock and formed as leather is commonly wet shaped. In this case a leather disc was soaked, pressed into a die, left to dry and then trimmed. The seal is then thoroughly oil soaked. The goal is to get a cup that seals readily against low pressure yet slides through an open cylinder with very little friction.

I checked and have an extra seal that I made when constructing Moriya Major to which you are welcome. But then you would have to use the exact same tube size for the power cylinder - of which I still have some.

I must say that making a close fitting cast iron piston is more straightforward. So far my leather seal has held up well, but have decided that if it wears out too soon, I will switch to a cast iron or graphite piston as on Moriya and Moriya II.

As to the gasket material I used, it is FEL-PRO #3157 Gasket Material. I found it at our local auto parts store, but I checked and it is available from the amazing Amazon. This material cuts clean and it dry seals superbly.

 

[Steamchick]

Leather cup seals - for around 1/2" bores - are available on-line from companies that supply spares from Paraffin (pressurised) blowlamps, and lights. I bought a few just a year or so ago, as they are better than my home-made ones. Finding leather the right thickness is mot always easy. My gardening gloves welding gloves and old shoes have bits trimmed off for washers, but either too thick, too thin or not durable.
You may be able to make a different piston (aluminium?) To take a size-for-size polyurethane o-ring... if you can find a suitable component. Polyurethane is durable, long lasting, and has a low coefficient of friction and can be lubricated with silicon grease (PVC pipe assembly grease), PTFE spray or furniture polish spray..... if silicon. But you need to size the o-ring to bore so there is n interference, nor clearance as assembled. Just a sliding fit.
K2

 

[jlchapman]

Hi TinkerJim,

As far as tubing, I used what was specified the 1.312 OD x 1.072 ID for the power cylinder. I like the leather cup because its something we would of had back in the day. I'm interested in your offer for the leather cup.

Thanks for the gasket material part number. Amazon delivered it yesterday.

Thanks, Jerry

 

[TinkerJim]

Hi TinkerJim,

As far as tubing, I used what was specified the 1.312 OD x 1.072 ID for the power cylinder. I like the leather cup because its something we would of had back in the day. I'm interested in your offer for the leather cup.

Thanks for the gasket material part number. Amazon delivered it yesterday.

Thanks, Jerry

That's the tube ! Send me a PM with your mailing address and I'll get the cup seal on its way to you.

 

[jlchapman]

PM sent!