Author Topic: CONWAY 0-4-0 3 1/2" GAUGE LOCO  (Read 54036 times)

Offline Admiral_dk

  • Full Member
  • ****
  • Posts: 978
  • Søften - Denmark
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #330 on: January 13, 2018, 08:21:04 PM »
Nice progress with many parts completed and to go too. I like the zink plating - it pretties things up in a very useful way  :ThumbsUp:

Online Kim

  • Full Member
  • *****
  • Posts: 3084
  • Portland, Oregon, USA
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #331 on: January 14, 2018, 12:46:33 AM »
Great progress Rich!

It's been a while since I've been able to catch up on your build here.  I often read at work during the week and for some reason, it seems that your hosting service has been blocked by my work's firewall.  So I can't see any of your picture when I read during lunch.  But today, reading from home, I could catch up on your pictures and your eccentric rods look great!  As do all the other little sundry pieces you made today :)

Kim

Offline Firebird

  • Full Member
  • ****
  • Posts: 872
  • East Midlands UK
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #332 on: February 08, 2018, 06:48:53 PM »
Hi

I said it would be a while until my next post but at long last here it is.

Thanks Admiral and Kim  :ThumbsUp:

A couple of countersunk washers



Next on the list are the cranks. They are made fron 1/2" thick mild steel. Print out some actual size drawings and glue to a bit of 1/2" x 2" steel bar as a guide



Using the DRO to accurately centre drill the positions



Then drill and ream 9/32" for the crank pins



Followed by drilling and reaming 7/16" for the axle



Cut off in the bandsaw





Fits here



Much of the waste removed in the mill






Cheers

Rich



Offline Firebird

  • Full Member
  • ****
  • Posts: 872
  • East Midlands UK
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #333 on: February 09, 2018, 08:34:22 PM »
Hi

Having got the cranks roughed out I held them together with a short length of 7/16" silver steel and a 9/32" drill and set them level in the mill vise.



A face cutter skims all four at once



Flip them over and face cut the other side



Turn a mandrel and mount in the rotary table and machine the large end






Turn another mandrel and machine the small end





Cheers

Rich


Online crueby

  • Full Member
  • *****
  • Posts: 6801
  • Rochester NY
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #334 on: February 09, 2018, 09:19:09 PM »
Nice!

How do the mandrels clamp down on the parts, is the piece on the top a bolt screwing into the base in the chuck?

Offline Firebird

  • Full Member
  • ****
  • Posts: 872
  • East Midlands UK
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #335 on: February 10, 2018, 10:22:32 AM »
Hi Crueby

Its a stub of steel about 1" diameter. The ends have been turned down to 7/16" and 9/32" to just under 1/2" in length. The 7/16" end is drilled and tapped 6mm and the 9/32" end drilled and tapped 5mm





The mandrel is held in the chuck.

Here the same mandrel is being used in the lathe to turn the 1/32" boss





The finished cranks





Cheers

Rich
« Last Edit: February 10, 2018, 11:35:27 PM by Firebird »

Offline Firebird

  • Full Member
  • ****
  • Posts: 872
  • East Midlands UK
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #336 on: February 11, 2018, 12:49:01 PM »
Hi

And now for something completely different.

Looking through the plans to see what part to make next I came across the smokebox front plate. This is available as a casting for about £25.00. The casting would still need maching so I looked at whether or not I could fabricate it.



Next job was to look through available materias and I came up with a bit of 1/8" brass plate and a length of 1/8" x 1/2" brass bar



Print out an actual size drawing and stick it to the plate leaving 1/2" extra at the bottom for fixing




I have a 7" rotary table that I built some time ago, here's a link to the build

http://www.modelenginemaker.com/index.php/topic,2375.0.html

Unfortunately photosuckit have removed all the images but there art a few videos still viewable

A scrap of 18mm MDF cut into a 7" circle



The rotary table is centred under the mill, dials set to zero and the X and Y tables locked



Drill and countersink 4 6mm holes in the MDF and fix to the rotary table with 4 countersunk cap head screws



The brass plate is centre punched in the centre of the hole and centred on the mill. 4 large (5.5mm) self tapping screws
hold the plate down





move the table over and drill a start hole.



Change to 1/4" cutter and cut out the centre



Then take lighter cuts to finish to size



Move 2 of the screws and machine the outer profile



Move the other 2 screws and machine off the bottom edge








Using my home made bending rolls, http://www.modelenginemaker.com/index.php/topic,5751.0.html 

to curve the brass bar





I couldn't get the shape quite right without it springing so I silver soldered  just a part of it then clamped the next piece and silver soldered and so on





Cut off the waste





After a spell in the pickle




Looks ok  :)

Cheers

Rich







Online sco

  • Full Member
  • ****
  • Posts: 1499
  • Location: Northants UK
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #337 on: February 11, 2018, 01:17:33 PM »
Looks more than ok from here!  Nice job Rich,

Simon.
Ars longa, vita brevis.

Offline Firebird

  • Full Member
  • ****
  • Posts: 872
  • East Midlands UK
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #338 on: February 11, 2018, 02:34:20 PM »
Hi

Thanks Simon  :ThumbsUp:

Here's a bit of video


Cheers

Rich

Online Kim

  • Full Member
  • *****
  • Posts: 3084
  • Portland, Oregon, USA
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #339 on: February 11, 2018, 03:32:29 PM »
Very nicely done, Rich!
The silver soldering must have taken a while, soldering a short bit then waiting for it to cool and reclamping all the time.  But nice results!
Kim

Offline Firebird

  • Full Member
  • ****
  • Posts: 872
  • East Midlands UK
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #340 on: February 13, 2018, 07:30:45 PM »
Hi

Thanks Kim

The silver soldering didn't take too long, all done in 3 operations. There is a little more work to do yet, the lugs for the smoke box door hinge and I might have to machine down the flange . The plans show it as 5/16" where as I have used 1/2". It might not need machining down as it is just where the outer of the smokebox is fixed to.

Cheers

Rich

Offline zeeprogrammer

  • Full Member
  • *****
  • Posts: 6232
  • West Chester, PA, USA
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #341 on: February 14, 2018, 12:03:18 AM »
Trying to catch up here. I always enjoy your posts and the last several have been awesome.  :ThumbsUp:
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Online b.lindsey

  • Global Moderator
  • Full Member
  • *****
  • Posts: 12173
  • Dallas, NC, USA
    • Workbench-Miniatures
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #342 on: February 14, 2018, 12:28:52 PM »
Just getting caught back up myself Rich. really nice work and wonderful results!!

Bill

Offline Firebird

  • Full Member
  • ****
  • Posts: 872
  • East Midlands UK
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #343 on: February 15, 2018, 08:02:41 PM »
Hi

Thanks Carl and Bill  :ThumbsUp:

To make the little firebox door hinge lugs I machined a bit of 3/16" brass



Cut off from the parent material and drill the 1/16" hole



Machine the backside






Machine a slot in the smokebox front



And silver solder in





2 little steel brackets



In place with 2 temporary screws. Rivets will be fitted later



A start on the slide bars. 4 lengths of ground stock are cut a little over length




The 3/16" holes have been drilled in one end. A piece of ally bar has 4 holes drilled and tapped and the slide bars bolted down



Cheers

Rich



Offline Firebird

  • Full Member
  • ****
  • Posts: 872
  • East Midlands UK
Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #344 on: February 17, 2018, 06:46:06 PM »
Hi

To machine the slide bars I had to do a lot of messing about with angle gauges, clamps and various cutters but in the end they turned out ok.










Cheers

Rich