Thanks for the reply Robert the material in mind is "ordinary ? " mild steel, … just frames for garden loco items for the grandsons. Seem to remember oxy acetylene/propane cutting gave a hard surface skin?

Pete

Thanks for the reply Paul. I intend to bore the holes on the mill, so was hoping to do one cut per hole, move the frame along onto a 28 mm dia location peg and then bore the other bearing seat?

I was hoping to get away with one set up of the boring head and was really trying to gauge how well my hs steel bit would stand up to 16 holes 12 mm deep?

Haven't got and never used a carbide boring cutter? Come to think of it, never used a boring head much, but don't want to mess up my lasered frames !

Pete

Edited By Pete White on 17/08/2020 13:34:19

Edited By Pete White on 17/08/2020 13:37:14

Please tell me more Bazyle, 6mm is thick on reflection, thank you, so 5 or even 4mm then.

I am new to this rail stuff, don't understand,"one fixed axle", we are talking two bogies for a driving truck here, to manage long wheel base and tight radius corners ?

Input welcome, even thinking of acetal collars now for the bearings housings , bolted with a locating spigot into the laser cut holes in the frames?

Not looking for exhibition standard here, just some engineering, even with plastic? that is quick to build and works.

Pete

Pete