Forming pony truck frames

[edinthecloudsParticipant @edintheclouds]

[edinthecloudsParticipant @edintheclouds]

Hi,

I've been reading about normalising steel before machining, I'm about to make a start on a pair of pony truck frames that have been laser cut.

Should I heat treat (normalise ) the frames as they need two bends/curves formed to make a gentle 'Z' shape to attach the pivot bearing to the loco.

Also would it be worth milling a line few thou. (.010/.020" deep) on the inside of each bend about 1/16" wide to make sure the bends are square to the frames, as the compressed metal will form a bulge and maybe over stretch the outside surface.

Is anyone building or built a SR Mogul 260 'Ashford' by Martin Evans?

Les

[Michael ToppingParticipant @michaeltopping17870]

Les,

Laser cut steel in normally hot rolled pickled and oiled so it will be in the normalised condition as received.

I built an Ashford some years ago when the series was first in the model engineer. Don't remember having any major issues and it was a very good running loco.

Michael

[edinthecloudsParticipant @edintheclouds]

Thanks Michael.

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