Search found 55 matches

by gamh44
Thu Aug 29, 2019 4:21 am
Forum: Build Log
Topic: My N&W class A 1239 (gauge 5", 1 in 10 scale)
Replies: 178
Views: 70994

Re: My N&W class A 1239 (gauge 5", 1 in 10 scale)

Asteamhead

Thank you so much for these details. The photos are great and you are making steady progress. Are you planning on using superheated steam? If not, how will you drain the cylinders?

Geof
by gamh44
Tue Jun 25, 2019 6:46 pm
Forum: Build Log
Topic: My N&W class A 1239 (gauge 5", 1 in 10 scale)
Replies: 178
Views: 70994

Re: My N&W class A 1239 (gauge 5", 1 in 10 scale)

Asteamhead

Very much looking forward to seeing how the CC pumps turn out. Look great so far. Please provide as much detail as you are willing!

Geof
by gamh44
Sat May 11, 2019 5:16 am
Forum: Build Log
Topic: Constructing The Josslin NYC Hudson Lead Truck
Replies: 65
Views: 18904

Re: Constructing The Josslin NYC Hudson Lead Truck

Carrdo

Following along with your truck build - thanks for posting.
Carrdo wrote:
Fri May 10, 2019 11:13 pm
For these axles, cold rolled steel round bar was used.
So will you just have steel axles in steel axle boxes - or something between?
by gamh44
Sun Apr 21, 2019 4:08 pm
Forum: Build Log
Topic: N&W S1a Project - Tender Build
Replies: 35
Views: 13128

Re: N&W S1a Project - Tender Build

So I did the press test with the wheel that had 0.002" interference and the gauge on the press got to 5T before I decided enough was enough.

So onto the real deal and here is the first of four. Three to go. Quite happy with the result.
58. WheelsAxlesDone.JPG
by gamh44
Mon Apr 15, 2019 4:58 am
Forum: Build Log
Topic: N&W S1a Project - Tender Build
Replies: 35
Views: 13128

Re: N&W S1a Project - Tender Build

Harold Thanks again. I took the test piece to work today and put it in the 20T press. It held well but I did manage to press it out. There was indeed a small amount of galling. I brought it home and redid the whole arrangement with about 0.002" interference. I needed to get the wheel quite a lot hot...
by gamh44
Sun Apr 14, 2019 3:06 pm
Forum: Build Log
Topic: N&W S1a Project - Tender Build
Replies: 35
Views: 13128

Re: N&W S1a Project - Tender Build

Harold Thanks. I don't have a press handy but should be able to get access to one so I will see how that goes. By my calculations, to expand the inside diameter of the wheel 1.4 thousandths, it needs to be at 230*C, which should be about the first colour change of the metal to light straw. If I go t...
by gamh44
Fri Apr 12, 2019 8:42 am
Forum: Build Log
Topic: N&W S1a Project - Tender Build
Replies: 35
Views: 13128

Re: N&W S1a Project - Tender Build

Harold Thanks for your thoughts and apologies for not being clear with my description. Using the 0.001" per 1" rule of thumb, the interference on 0.625" would be 0.000625" or just over 6 tenths of a thousandth as you say. I went for 1 thou over just to be sure so the ID of the wheel was 0.625" and t...
by gamh44
Thu Apr 11, 2019 9:40 pm
Forum: Build Log
Topic: N&W S1a Project - Tender Build
Replies: 35
Views: 13128

Re: N&W S1a Project - Tender Build

Did a test today to see how the shrink fitting the wheel to the axle will go. Since this is something I have not done previously I used the test wheel I turned and machined up a small test stub axle based on the 0.001" per 1" rule of thumb. Unfortunately, not all the wheel boring ended up perfect. A...
by gamh44
Wed Apr 10, 2019 7:23 am
Forum: Build Log
Topic: N&W S1a Project - Tender Build
Replies: 35
Views: 13128

Re: N&W S1a Project - Tender Build

All Just finished the last wheel and here they are. 55. WheelsDone.JPG For reference, I found the receipt for the material, which is grade 1035 and referred to as a mid carbon steel (0.35% Carbon). Described as having good machinability but it is definitely harder than the mild steel (grade unknown)...
by gamh44
Sat Feb 02, 2019 7:34 pm
Forum: Live Steam
Topic: silver soldering steel to steel
Replies: 34
Views: 6843

Re: silver soldering steel to steel

The obvious question is; why not take a couple of pieces of the steel you are going to use and try to silver solder them together? This should give you all the answers you need before you put any significant work in what you want to make. Good advice! I have just done this with the N&W tender bogie...
by gamh44
Tue Jan 01, 2019 2:01 pm
Forum: Build Log
Topic: N&W S1a Project - Tender Build
Replies: 35
Views: 13128

Re: N&W S1a Project - Tender Build

Dan and Harold Thanks once again for sharing your experience. It looks like I am now back on track (pun fully intended) to machining these wheels up in a reasonable amount of time. I dropped the spindle speed just one more pulley and things improved significantly. Cutting through the scale was done ...