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Class 22 Diesel (next project)

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Ron Laden30/08/2019 11:10:15
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1355 forum posts
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The axle die springs arrived which I have fitted to the bogies, I went for the red ones which I consider to be medium/heavy and it looks as if they are just about right. Each pair of batteries (14kg) will sit directly over the centre of the bogie plus I estimate a further 4 kgs at each bogie from chassis/body. The piccie below shows one of the bogies with a pair of batteries plus some ballast which I added to make up the weight. The spring compressed approx 2.5 mm which leaves 6mm of travel in the suspension which I think should be ok.

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Edited By Ron Laden on 30/08/2019 11:12:58

Ron Laden31/08/2019 15:19:33
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1355 forum posts
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Fancied some lathe work this morning so made a start on the buffers using the guide rod method for creating the convex face. I did the 0-4-0 buffers this way after some of you guys told me of it, it is so simple to do and works a treat. I put a square up to the face to show the convex, I went with a 220mm radius on 50mm diameter.

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Edited By Ron Laden on 31/08/2019 15:20:15

Ron Laden02/09/2019 09:19:29
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1355 forum posts
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Turned the first of the buffers to a shape and type I,m happy with. To the mill next as the base mounting plate is square plus I currently dont have a deep enough parting tool so I will cut it off with a slitting saw. The buffer face is the oval type and I think I will shape that by hand.

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SillyOldDuffer02/09/2019 10:31:36
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Posted by Ron Laden on 02/09/2019 09:19:29:


Turned the first of the buffers to a shape and type I,m happy with. To the mill next as the base mounting plate is square plus I currently dont have a deep enough parting tool so I will cut it off with a slitting saw. The buffer face is the oval type and I think I will shape that by hand.

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Very nice!

As you seem to pick skills up quickly why not have a go at turning the oval as well? In theory, offsetting the job's centre in a 4-jaw will cut one side of an oval, then offset equally in the opposite direction to put the same curve on the other side. It won't be a perfect geometric oval, but could be finished to look good by hand as necessary. The advantage of turning is producing four identical buffers without lots of manual work. This assumes there's enough swing on your lathe; check with a dimensioned drawing.

Be warned - I've never tried it myself and would practice on lots of scrap first!

Dave

Ron Laden02/09/2019 16:54:41
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1355 forum posts
240 photos

Thanks Dave, thats a good idea so I did a quick rough and ready check with the buffer offset in the 4 jaw and a marker pen in the tool holder. I will obviously need to calculate the offset and the tool position more accurately to bring me close to the finished shape but as you suggest it should reduce the hand work and will be repeatable on all four buffers.

Thanks again, Ron.

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Ron Laden05/09/2019 08:24:20
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1355 forum posts
240 photos

Just experimenting with a bit of added detail, turned up some bearing caps and added some pipe work. This was a bit thrown together this morning, the final finish will be better plus there is more to add but it doesnt take much to improve the look of it I think.

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Ron Laden13/09/2019 08:02:41
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1355 forum posts
240 photos

Chain drilling the chassis rail side walls for clearance at the bogie positions, 2" x 1" x 3/16" alu angle back to back to get a matched pair. I did remember (just) to set the depth stop to prevent drilling the vice..smiley

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Ron Laden14/09/2019 08:08:11
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1355 forum posts
240 photos

You cant beat some early morning (5am) smiley machining to get the day off to a good start.

Anyway, 2 x 46 holes later, waste pieces removed and the angled ends cut and filed to shape it was back on the mill to clean back the drilled edges. Its a case of sliding the work along so as not to get too far away from the vice but it works well enough.

I would have used a 10mm 2 flute carbide alu cutter but its past its best so need to get another one. So it was a case of having to use a 8mm 3 flute coated HSS cutter from ARC,s premium range. I am really impressed with this cutter I have used it on both steel and alu with great results, think I will get a 10mm version also.

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Ron Laden16/09/2019 18:01:16
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1355 forum posts
240 photos

Today I machined and fitted the bogie mounting plates to the chassis rails so obviously I just had to offer up the bogies to see how it looks, something must be wrong....it all fits..smiley

A lot more to add to the chassis but awaiting some material to continue, also material for the traction engine. I must admit I thought I was mad and biting off more than I could chew running the engine and loco builds side by side but it seems to work. I,m enjoying both of them and its good fun which is what its all about I guess.

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Edited By Ron Laden on 16/09/2019 18:01:48

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