The Ford Barn

habbott · 08-17-2011, 04:48 AM

Any done this themselves. In the process of converting my diff to the Hot rod works axle modification. Needing to check diff for straightness due to welding on lugs and axle bearing ends. Starting to make up the mandrels to fit in each bell bearing location. Going to use a 1.500 inch shaft what clearance would you use to machine the shaft hole in the mandrels.

Dak Rat · 08-17-2011, 07:38 AM

Made-up aluminum "donuts" on the lathe. Two for the wheel bearings and two for the carrier bearings on the inside of the "bells" This will keep everything in perfect alignment when you weld and nothing moves around. When I was done I could pull the 1-3/4 shaft out with one hand.

habbott · 08-17-2011, 02:14 PM

What was the shaft to hole clearance you use when you machine the mandrels? I was thinking around 5 thou clearance is this too loose?

Bassman/NZ · 08-17-2011, 03:24 PM

Welding right around a bell is unlikely to cause problems, but welding brackets on requires equal and opposite welds to maintain straightness. The excess welds can be ground off after cooling.

habbott · 08-17-2011, 07:12 PM

Anyone know what tolerance is used for the mandrel holes?????

Ray With · 08-17-2011, 08:13 PM

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.002 is fine and you actually have more than that in the bearing movement.

habbott · 08-17-2011, 09:10 PM

Thank you
I was think around 4-5 thou for that same reason (movement in the bearing and the axle splines)

habbott · 08-18-2011, 01:39 PM

Had a discussion last night with a toolmaker he was saying a tolerance of around .005 to .010 thou should be fine. Because of the amount of mandrels used and there position. We talk about welding the bearing ends on with this jig set up. He said to use some brass shim stock to remove most of the clearance on the end mandrel for welding.
What is your thoughts on this process?

08-17-2011, 04:48 AM	#1
habbott Member Join Date: Feb 2011 Posts: 55	Banjo diff straighting Any done this themselves. In the process of converting my diff to the Hot rod works axle modification. Needing to check diff for straightness due to welding on lugs and axle bearing ends. Starting to make up the mandrels to fit in each bell bearing location. Going to use a 1.500 inch shaft what clearance would you use to machine the shaft hole in the mandrels.

08-17-2011, 07:38 AM	#2
Dak Rat Senior Member Join Date: May 2010 Location: Minot, ND Posts: 218	Re: Banjo diff straighting Made-up aluminum "donuts" on the lathe. Two for the wheel bearings and two for the carrier bearings on the inside of the "bells" This will keep everything in perfect alignment when you weld and nothing moves around. When I was done I could pull the 1-3/4 shaft out with one hand.

08-17-2011, 02:14 PM	#3
habbott Member Join Date: Feb 2011 Posts: 55	Re: Banjo diff straighting What was the shaft to hole clearance you use when you machine the mandrels? I was thinking around 5 thou clearance is this too loose?

08-17-2011, 03:24 PM	#4
Bassman/NZ Senior Member Join Date: May 2010 Location: Napier, New Zealand Posts: 2,001	Re: Banjo diff straighting Welding right around a bell is unlikely to cause problems, but welding brackets on requires equal and opposite welds to maintain straightness. The excess welds can be ground off after cooling.

08-17-2011, 07:12 PM	#5
habbott Member Join Date: Feb 2011 Posts: 55	Re: Banjo diff straighting Anyone know what tolerance is used for the mandrel holes?????

08-17-2011, 08:13 PM	#6
Ray With Senior Member Join Date: Jul 2011 Location: Montgomery,Texas Posts: 115	Re: Banjo diff straighting Sponsored Links (Register now to hide all advertisements) .002 is fine and you actually have more than that in the bearing movement. __________________ Hotrodchat's Picture Gallery 26,000 pictures to keep you looking

08-17-2011, 09:10 PM	#7
habbott Member Join Date: Feb 2011 Posts: 55	Re: Banjo diff straighting Thank you I was think around 4-5 thou for that same reason (movement in the bearing and the axle splines)

08-18-2011, 01:39 PM	#8
habbott Member Join Date: Feb 2011 Posts: 55	Re: Banjo diff straighting Had a discussion last night with a toolmaker he was saying a tolerance of around .005 to .010 thou should be fine. Because of the amount of mandrels used and there position. We talk about welding the bearing ends on with this jig set up. He said to use some brass shim stock to remove most of the clearance on the end mandrel for welding. What is your thoughts on this process?