Axle box Timken Covers Part 1

The axle box castings have dummy Timken Bearing covers cast in. These were quite rough and oversize so I have turned up a 19mm stub mandrel  from some scrap aluminium bar and cleaned them up.

Axle box was super glued (cynoacrylate adhesive)  to the stub mandrel and left for 5 minutes to bond.




 Front face had the barest minimum removed to clean it up.


Diameter reduced to around 20.3mm, then length reduced to 7/16" (5.56mm) to match the drawings.


I bought a box of shaped lathe tools from Myfords before they shut down the Beeston Site and sold everything off to RDG Tools. A quick rummage found a nice curved tool, it did need a bit of work with a stone to sharpen it but nicer than making one from scratch.


Machining the rounded corner.


The full size engine has a more gentle curve, but I have been true to LBSCs drawings, this will make it easier to Engrave the Timken logo on the front face.


The valve on my chefs mini butane torch has failed so I had to get a big burner fired up to release the axle box from the mandrel.


Need to keep the mandrel in the chuck so it remains nice and concentric.


Another spot the difference competition.


Next job is to drill holes for the 4 cover plate studs. I may make a centring jig of some kind to make setup easier. 


 I will use the Mill's PCD drilling feature if I can figure out how to use it!

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