Gearbox help needed

Can someone tell me the depth of the layshaft bearing hole (casing edge down to the retaining shoulder) as the bottom of the hole is full of burrs from a bearing failure and the PO simply glued in a new bearing in without fixing the casing a real bag of shit, probably needs to be thrown but I'll see if I can save it from the scrap heap.

Thanks

Don't have measurements but had my 70 box go there too,and the layshaft end was rattling about unsupported ,chewing up the hole end. Being a poor student a new box was out of the question so got a new layshaft and roller bearing fitted after cleaning up the bottom of the bore with a dremel tool (all the while looking for any cracks). There was the crack between the 2 bearing bores but this is a known thing not to stress out over ,many boxes had this.The sides were protected by the mangled bearing steel outer. The layshaft end had mushroomed a tad so had to be replaced. Worked out fine .

Qaufe shell's bearing race depth = 0.4525". Quafe also has a cut out for the lay shaft end that's an extra 0.125" deeper. Comnoz uses JBW to glue his loose ones in. My Quafe was raced to wallowed/spun damage so I'll grind couple notches in the outer race to give some JBW jamming lock up rather than just iffy adhesion locking when heat and distortion loads applied. Qaufe can be assembled with AMC guts so similar enough

Does anyone know if the outer race is level with the top of the hole or if it protrudes a bit. I have no references so its a bit of guess work how deep to re-cut the shoulder/seat.

I just measured:
- recess depth (where the outer bearing race butts against): 11.4 mm below machined housing surface.
- an old bearing (6203 ball bearing "Portugal"): width is 12 mm. So it protrudes.

great, just what I need to know. Really appreciate the help, just need to figure out how I am going to clean up the mess inside. The shoulder is almost completely distroyed! I might cut the rest out and turn up a small ring which I can push in to replace the old shoulder.

Many thanks

Just rebuilt a Norton gear box with new bearings, the layshaft bearing with a new roller bearing and it protrudes a little but the box went together without any problems at all.

Ashley

My Mk 111 box has the roller layshaft bearing and I paid a machinist to fit a sleeve into mainshaft end hole to press in a roller bearing there as well. Overkill but yes I have done it so just do it.

Well, I bit the bullet late last night and milled out what was left of the shoulder, I took it down to the back face which was seriously gouged out from the original failure. A bit of a nerve job as I could not really see what I was doing. A bit of a worry as I started to remove material, there was a load of sparks and nasty noise which gave me a bit of a fright. Thinking I had screwed it up, I stopped the mill and rechecked but all seemed OK? I continued and after removing the first 1 mm or so, I was machining smoothly. I suspect it was bits of hardened bearing or old cage embedded in the burr material. Anyway, on with turning up a "shoulder" and then pressing it in. I'll pop on some pictures later.

PS thanks for all the great comments - its a motivation to carry on and a fantastic help