Converting a TT HS worm to an AA

AA Ford Discussion Group relating to the repair and restoration of your AA Ford.
Post Reply
Ford Truck Nut
Posts: 205
Joined: December 9th, 2010, 5:21 am
Model Year: 1928
Location: Plainview MN

Converting a TT HS worm to an AA

Post by Ford Truck Nut »

Project ive been working on, I took a TT worm and Converted it to fit in to an AA axle. The TT is about an Inch shorter and the splines are different, The AA and the TT are identical up until the splines.
I took a low speed AA worm and cut the splines off in the bearing surface then faced it off in the lathe until it was the correct length (holding it next to the TT shaft) The outside is case hardened so it is kinda hard to cut. I drilled a hole 3 1/2 inches in the new coupler 5/8 diameter. I decided to machine the hole square so the drive on the worm would rely on the square and not the weld where it could break off.
i cut out a set of carbons on the milltronics, one rougher and a finisher and then set the part up in the EDM and cut the square in to it.
The shaft was set up in two vices and 2 Vblocks in the mill and all 4 sides were indicated and milled flat to make the 3/4 drive square. after roughing i reindicated it back into the mill and measured every side and marked every side to fit it to a side in the new coupler. gauge blocks were used and an indicator was run along it to insure every thing was milled to the right size.
After all 4 sides were finished i put the shaft in the lathe and cut a chamfer on both the shaft and the coupler so it could be welded together. And to finish it turned the weld true so the bearing can ride on it
Attachments
670560d9-6ba6-4d76-90b7-16a898618d0f.jpg
670560d9-6ba6-4d76-90b7-16a898618d0f.jpg (38.19 KiB) Viewed 3803 times
00c0e1db-7a65-41c6-8ed8-a667757577e6.jpg
00c0e1db-7a65-41c6-8ed8-a667757577e6.jpg (30.06 KiB) Viewed 3803 times
66fa7628-fd04-4fdc-9ec9-27aa3c9828bd.jpg
66fa7628-fd04-4fdc-9ec9-27aa3c9828bd.jpg (23.21 KiB) Viewed 3803 times
"Bear Down, try Hard, and never quit, NEVER"
Tuff Headman
Ford Truck Nut
Posts: 205
Joined: December 9th, 2010, 5:21 am
Model Year: 1928
Location: Plainview MN

Re: Converting a TT HS worm to an AA

Post by Ford Truck Nut »

more pics
Attachments
57fff4f8-16d2-4187-982b-0335a48fdf4e.jpg
57fff4f8-16d2-4187-982b-0335a48fdf4e.jpg (47.17 KiB) Viewed 3802 times
399756a8-75e7-4652-81ec-89cfa8e95ec5.jpg
399756a8-75e7-4652-81ec-89cfa8e95ec5.jpg (10.81 KiB) Viewed 3802 times
"Bear Down, try Hard, and never quit, NEVER"
Tuff Headman
User avatar
1crosscut
Posts: 877
Joined: December 25th, 2010, 7:22 pm
Body Type: 82-A
Model Year: 1929
Location: Lincoln, NE

Re: Converting a TT HS worm to an AA

Post by 1crosscut »

Very impressive indeed!!
------------
Dave
KimVanOrder
Posts: 753
Joined: August 11th, 2013, 4:25 pm
Body Type: 82-A Platform
Model Year: 1928
Location: Hamilton, Mich.

Re: Converting a TT HS worm to an AA

Post by KimVanOrder »

Wow !!! I'm tired.
KVO
Dec. '28 AA
Post Reply