Fowler DNB Roller
 

I am looking for a steel cover that fits over the front cylinder cover. I dont know if they were casted or pressed. The one
is missing from my roller.

They were pressed. Very heavy pressing mind, would think fabricated would be the way to go. My HP one is bent since being hit by the piston/road but hoping it will straighten out.

I think i've also seen that the drawing is available at Reading.

Fowlers had some very heavy press gear , which they used for such items as mouldboards .

It would not be difficult to turn a pattern to cast one , the most awkward thing might be finding a decent piece of wood to start with . A grey iron casting might not polish up the same colour as your present one , or your other one if yours is a compound . An SG iron casting would be more silver , only possibly more awkward to machine ; it might start to ring and chatter .

I would have thought that some kind person might lend you one which would thicken up inside with filler to make a pattern , complete with a centre boss inside for chucking .

TT's own Basil does a nice line of fabricated decorative cylinder end covers. A recent one in stainless for a Piston Valve Compound Aveling was a work of art.

Big lump of steel - cnc lathe - walk away - big pile of swarf - job done!!!!!

Or just get them spun! I have seen a set of B6 ones done this way and went to the same supplier for my 6" Tasker ones. Was very cost effective, try Slough Metal Spinners.

We have the press tools and the press to make one as original - you need but ask......