Search found 1211 matches

by Carrdo
Wed Aug 05, 2020 7:09 pm
Forum: General Discussion
Topic: Machining Setup's with Few Comments
Replies: 91
Views: 50372

Re: Machining Setup's with Few Comments

Pretty much any high silver content silver solder, the same types as when silver soldering copper model locomotive boilers. Either thin strip or small dia. rod (1/32" or 1/16" dia.). Just looked in my "scrap" silver solder box and am reading on one Easy Flo 45 no cadmium and on another Silvaloy A 45...
by Carrdo
Wed Aug 05, 2020 2:17 pm
Forum: General Discussion
Topic: Machining Setup's with Few Comments
Replies: 91
Views: 50372

Re: Machining Setup's with Few Comments

The bandsaw blade silver soldering fixture which I use to make up or repair my bandsaw blade stock. It was made to a design by Harry Hawkins who was a past president of TSME. In my 14" Delta metal bandsaw, I use mostly 1/2" wide DoAll Dart high carbon steel blades bought in 100 foot rolls. After cut...
by Carrdo
Mon Aug 03, 2020 2:31 pm
Forum: Build Log
Topic: A Real Dirty Job
Replies: 172
Views: 81465

Re: A Real Dirty Job

Finishing the cab rear support sheet.

The automatic stoker tunnel cutout in the cab rear support sheet was produced through more band sawing, belt sanding and milling. Nothing special here other than taking the usual care with each operation.
by Carrdo
Sat Aug 01, 2020 4:17 pm
Forum: Build Log
Topic: A Real Dirty Job
Replies: 172
Views: 81465

Re: A Real Dirty Job

Further along after some band sawing, milling, belt sanding, drilling and tapping. Am just doing the minimum drilling and tapping to align with the existing holes in the engine's cradle and cab floor.
by Carrdo
Thu Jul 23, 2020 2:26 pm
Forum: Build Log
Topic: A Real Dirty Job
Replies: 172
Views: 81465

Re: A Real Dirty Job

Pushing on with the angle milling of the cut down angle and the cab rear support sheet.
by Carrdo
Wed Jul 22, 2020 10:36 pm
Forum: Build Log
Topic: A Real Dirty Job
Replies: 172
Views: 81465

Re: A Real Dirty Job

Fly cutting the HR steel angle to finished thickness on the wide face. For HR steel, I had to experiment several times with the clearance angles on the HSS tool bit, increasing them several times and honing the rounded cutting edge to have a fine flat surface finish. DOC was 0.003" - 0.010" at 90-13...
by Carrdo
Tue Jul 21, 2020 8:00 pm
Forum: Live Steam
Topic: Fiddle Fidd.. Fi...e
Replies: 6
Views: 1917

Re: Fiddle Fidd.. Fi...e

Drilling and tapping the pump body for the water outlet. This would complete all of the steam and water inlet/outlets on the pump. I chose to wait until the correct HSS "bottoming" tap arrived from the UK after the excursion with the pump water inlet tapping problem. It was sent over via air mail bu...
by Carrdo
Sun Jul 19, 2020 1:13 pm
Forum: Build Log
Topic: A Real Dirty Job
Replies: 172
Views: 81465

Re: A Real Dirty Job

The first step to produce a new cab rear support sheet was to draw it up, full size, in cardboard. The Hoffman Hudson cab rear support assembly (second photo) is constructed, in my case, from custom machined miniature HR steel angle pieces attached to the rear support sheet. They are only 1/4" by 1/...
by Carrdo
Mon Jul 13, 2020 11:15 pm
Forum: Build Log
Topic: A Real Dirty Job
Replies: 172
Views: 81465

Re: A Real Dirty Job

A different method for the milling of the centre portions of the eye bars. This came about as I chose not to exchange my regular 4.5" 25 lb. milling vise for the 6" 85 lb. heavy duty milling vise without some sort of lifting assist which I don't have. Normally, one would just set the end pins in eac...
by Carrdo
Thu Jul 09, 2020 8:24 pm
Forum: Build Log
Topic: A Real Dirty Job
Replies: 172
Views: 81465

Re: A Real Dirty Job

Following Wolfgang's advice, I decided to make a test drawbar from a scrap piece with the two chaffing plates just touching. It turns out that the centre to centre distance on this locomotive with the two chaffing plates touching is 4-7/8" where as the Langworthy drawings suggest 4- 11/16" but to ch...
by Carrdo
Thu Jul 02, 2020 3:20 pm
Forum: Build Log
Topic: A Real Dirty Job
Replies: 172
Views: 81465

Re: A Real Dirty Job

Wolfgang thank you for the latest reply pointing out the weakness of the existing eye beam design. Yes, I am aware that the intersection of the eye and the beam in both the drawbar and the safety bar represents a stress raiser and a fatigue point if there is not a generous transition radius between ...
by Carrdo
Tue Jun 30, 2020 7:39 pm
Forum: Build Log
Topic: A Real Dirty Job
Replies: 172
Views: 81465

Re: A Real Dirty Job

Some further work on the drawbar and the safety bar.