I need to replace the guide bars on my 3 1/2 britannia, the challenge is finding some bms of the correct size. They are made from 5/32 × 1/2. Can any suggest a supplier or spare some that I can buy off you. The metric equivalent is 4mm and I can find any bms in that size.
I made the slidebars for "Lyn" from GFS, as Roger suggests, 5/32" x 1/2". I used bronze slippers on the crosshead. If I remember correctly, it was cut for me from a larger piece. That supplier is no longer trading, but I believe M-Machine Metals in Darlington stocks GS and will cut it to requirements. Usual disclaimer, but their service is excellent and their prices reasonable.
Hope that helps.
2.5"g narrow gauge modeller - Bagnall 0-4-2T, L&B 2-4-2T "Lyn" and just completed Burma Mines Rly 0-6-0 - all to 1.25": 1'. Now working on the next 2.5"g model - ex-Mecklenburg Pommersche Schmalspurbahn No.99 3462, until recently on the Waldeisenbahn Muskau near the Polish border....
Roger, it looks like the cross heads are steel. How easy is ground stock to tap as the are held on with 8bs bolts so not massive taps if the material is going to be hard.
Hi Stephen, It's about 50% more difficult to machine Ground Stock compared to Mild Steel, so it's not really a problem. Just take it gently and swap between taps if the resistance gets to the point where you think it will break the tap. Any amount of turn with a tap is a victory, so just swap from say the Second to the Plug for the next small turn and then change back. That way you can cut almost any size thread in any material, even if the tap is a bit blunt.
This is so grown up AIRFIX KIT that I am sure we all dreamed about when we were much Younger. Now for the ULTIMATE PHOTOGRAPH and I did one of my Gemma when I was 27... All the parts laid out just before they all go together. Yes it takes hours but it was lovely to do. Then I got Married!!! Early days Superb and Gemma steamed nicely as well. I did so much back then with a little vice attached to a small box.
David and Lily.
Builder of far too many projects, but I love them all. The more Locomotives you have building, the more solutions to other Projects Problems get Solved. Reworking Simplex into a Fowler Complex. Making a Jinty more to scale. And going up a size in the shape of a Jessie.