Projects Finally I get my Flathead powered T Roadster

Rear plate,tubing for rear plate,front torque tube flange and bearing holder this part is made in two parts. The two 3/4" holes in the rear plate are centered in the plate and are 3.000 apart.

 

rear plate radius being machined on precision rotary turn table, another tool you need in the machine shop business.

 

now to the lathe to bore the large hole which is for the pinion bearings to pass thru and locate for the welding jig.Small hole for the lower shaft to pass thru, the counterbore is to locate the lower bearing.These bores are undersize they will be finished later after welding.

 

I'm a mechanic by trade, worked as a welder for a decade. So I'm not a machinist at all, but to me this is almost like workshops p@rn!

That is awesome!

Dident people refer to this kind of work as a welded QC or a banjo QC. As a general that is, this would be known as plain awesome!!

 

Very nice work Mike! I'm glad you are sharing it with us, makes my thread a whole lot more interesting.

 

getting ready to set the welding jigs,plates are bolted on to help to prevent warpage,the turned down lip really helps to hold it. [/ATTACH]

 

The turned down lip is same dia.,as the bell

 

These are the jigs used

 

jigs installed in order

 

A 3/4" shaft is used everything is now centered ready for clamping

 

now the side plates are on and the end jigs ready for welding

 

remove end jigs only weld on rib the side plates are still on. This picture was taken later when was cooled

 

This has got to be one of the best 'how to' threads ..... ever!

 

The QC as built. Thanks for these sequence steps.
The '26-27 is an inspiration, look forward to seeing your build!

 

Very nice!...Well done!

 

I have a very good welder do the welding.When the welding is done let it cool not in a cold place but a warm place.Let it sit for five days, then heat the whole thing to about 400 degrees with a torch just where you cannot touch it.Let it sit two more days in a warm place then remove the jigs.This is a way of removing stress, normalizing.This is the way jig and fixture guys make precision tools, a lot of stress with that much welding.The center section was cast 65 to 75 years ago need to treat it nice give it every chance to be strong and stress free, when it is stress free it will turn smooth forever.

 

Very very very nice job bone 31 Thank you for your very interesting experience

 

I've never cared for quick change rear ends really, but holy shit man i want one of those centres!

 

Also, have you considered TIG welding all of it for a smaller, less heat affected zone weld?

 

Nick I let the welder do it his way as he can tig weld

 

Yeah, I'll call ya weird ;~)
This project will turn out like all your work....... beautiful.
Looking forward to it progressing.

 

while we are waiting to machine the housing,the next thing is to turn and grind the end of the pinion.this is to fit the end bearing in the floating plate.This is one of the hardest things to do as it is about 59 to 62 rc hardness like a coke bottle.Most shops will not touch it or send you to somebody that has a cylindrical grinder, at about $400.00 first rough down with carbide tool bit,must be finish ground or it will not be round plus .000 nothing minus .0001 I have a nice tool post grinder about 60 years old works perfect diamond dressing the wheel.

 

I have internal grinding quills that will turn 35500 rpm I love this old shit, when we cut the splines I will use a dividing head made in 1933 a Van Norman

 

that is .001 minus on the end dim.

 

Got to see your work at b-ville this year bone31 real nice stuff, I threw the water melon in the back of your coupe! Hope it stays dry for 2015!

 

The melon was Oregon sweet very nice thing to do.

 

KISS. built 5 of these. 3 are in my own hot rods. NO milling required. used a hole saw. tube welded to the outside of the banjo. does not extend inside. made a fixture off a Halibrand to install the front bearing retainer. my QC gear housing [ my own pattern] eliminates the extremly heavy 7/8" thick plate. foundry charged me $7.00 a pound for casting. i sold the pattern. plans and fixtures to a guy in AZ.

 

nice love to see all the ways that do the same things, and how they are made.

 

now we have a solid one piece center section that has been stress relieved the pinion has been installed,the machine work has been finished.Before the machining the head on the mill was indicated to the table within .001 that is one thou. the angle plate to .001 with the table travel, the center section to .001 to the pinion wall.If you work this way it will make things much better none of this a couple of thou. here and there or it is pretty close, as a tool and die maker it must be right.The holes for the pinion bearing retainer,the bearing holder, and the rear housing, have been drilled and tapped.

 

this is the torque tube end ford tube pattern,holes for the bearing retainer, bearing pocket .001 over bearing dia.