The Ford Barn

mrfirebird73 · 11-09-2011, 10:21 AM

How do you press on the worm gear without bending the steering shaft

. Any help will be greatly appreciated. Thanks Scott

700rpm · 11-09-2011, 11:16 AM

You need to have or find someone who has a special jig to hold the shaft firm just below the area where the gear is pressed on. KRW had such a jig, of course, but they aren't just everywhere. My local Model A genius fabricated one of his own, but it has to be (and his is) super heavy duty and machined just right. If you are located near Portland, OR, let me know and I can direct you to him.

Peter J · 11-09-2011, 11:24 AM

Scott,
A lot of machine shops will have a jig that should be able to do the job.

James Rogers · 11-09-2011, 11:24 AM

I have a jig I made that clamps the shaft just below the gear and holds it tight for the last 1/2" of pressing. It also doubles to press the gear off.

mrfirebird73 · 11-09-2011, 12:45 PM

Quote:

Originally Posted by James Rogers

I have a jig I made that clamps the shaft just below the gear and holds it tight for the last 1/2" of pressing. It also doubles to press the gear off.

Do you have a picture of the jig? I am interested in this for sure. Thanks

mrfirebird73 · 11-13-2011, 03:07 PM

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ajanke · 11-13-2011, 03:48 PM

I tap the end of the shaft with a 5/8 x 18 tap and then use a piece of grade 8 all thread with three washers and a nut. I tap all the way in and run the all thread in about 1 to 11/2 inches. I line up the worm, put three washers against it and then the nut. A little oil on the washers helps. I secure the shaft in a vice and then tighten the nut pulling the worm onto the shaft. There is plenty of room for the light switch rod.

Ned · 11-13-2011, 09:13 PM

Put the worm gear in the oven at about 300 degrees for 15 -20 minutes. It will expand and should slide on the sterring shaft. This also works with the gear on the front of the cranskshaft.

Robert1936 · 08-05-2012, 10:38 PM

I'd be a bit worried tapping into the "shaft" to pull the worm on as this would weaken the shaft allowing it to shrink slightly when the worm slides on and the interference fit would not be so tight, IMO.
robert1936

Richard/Ca · 08-05-2012, 11:28 PM

Quote:

Originally Posted by ajanke

I tap the end of the shaft with a 5/8 x 18 tap and then use a piece of grade 8 all thread with three washers and a nut. I tap all the way in and run the all thread in about 1 to 11/2 inches. I line up the worm, put three washers against it and then the nut. A little oil on the washers helps. I secure the shaft in a vice and then tighten the nut pulling the worm onto the shaft. There is plenty of room for the light switch rod.

OK! I am game to try your way. How many times have you done this way to press on a worm gear. I tried the heat it up way and now I have a worm gear stuck about half way on the shaft. And trying to figure out a way to get it off. Does the worm gear go on flush with the end of the shaft or does the shaft stick out a little.

quickchange · 08-06-2012, 12:01 AM

Like ajanke i have done several this way , A rattle gun works well , no problem with weakening the shaft by threading it , should finish flush. This method is recommended in the videos put out by Diablo Model A club , Of which our club purchased the lot to view on tec nights .

James Rogers · 08-06-2012, 07:09 AM

Quote:

Originally Posted by mrfirebird73

Do you have a picture of the jig? I am interested in this for sure. Thanks

Made from 1 piece of steel with all holes bored before it was cut into 2 pieces. Bolts are 1/2". Works great.

JoeWay · 08-06-2012, 09:17 AM

James, that's a nice tool. Do I see some residue of valve-grinding compound applied as insurance against slipping?

Joe

James Rogers · 08-06-2012, 11:38 AM

Quote:

Originally Posted by JoeWay

James, that's a nice tool. Do I see some residue of valve-grinding compound applied as insurance against slipping?

Joe

Actually Joe, that is dirt off of the last shaft I did. If this slips it can't be put on and valve grinding compound won't help much. When I did this I drilled the hole for the shaft and honed it to a tight fit and when it was cut the kerf of the saw made it tight enough to not crimp the shaft but tight enough to keep it from slipping. Never had any problem so far.

Hicktick · 08-06-2012, 12:11 PM

Have you tried putting the shaft in the freezer overnite .

Works for me on a lot of things that need pressed .

So they said ,,,,,Pops

James Rogers · 08-06-2012, 04:32 PM

Quote:

Originally Posted by Hicktick

Have you tried putting the shaft in the freezer overnite .

Works for me on a lot of things that need pressed .

So they said ,,,,,Pops

I have tried freezing the shaft overnight and heating the worm to 450 and it still won't go on properly. This is the only way I have ever been able to install a worm right.

Bob C · 08-06-2012, 04:57 PM

James, what size is your fixture, looks about 3X4X6.

Thanks
Bob

Richard/Ca · 08-07-2012, 01:24 PM

Quote:

Originally Posted by quickchange

Like ajanke i have done several this way , A rattle gun works well , no problem with weakening the shaft by threading it , should finish flush. This method is recommended in the videos put out by Diablo Model A club , Of which our club purchased the lot to view on tec nights .

Thanks Quickchange

Richard/Ca · 08-07-2012, 01:26 PM

Thanks quickchange for the information on the worm gear.

James Rogers · 08-07-2012, 05:33 PM

Quote:

Originally Posted by bob c

james, what size is your fixture, looks about 3x4x6.

Thanks
bob

2.5 x 3.5 x 6

11-09-2011, 10:21 AM	#1
mrfirebird73 Member Join Date: May 2010 Posts: 77	Steering worm gear install How do you press on the worm gear without bending the steering shaft. Any help will be greatly appreciated. Thanks Scott

11-09-2011, 11:16 AM	#2
700rpm Senior Member Join Date: May 2010 Location: Portland, Oregon Posts: 6,039	Re: Steering worm gear install You need to have or find someone who has a special jig to hold the shaft firm just below the area where the gear is pressed on. KRW had such a jig, of course, but they aren't just everywhere. My local Model A genius fabricated one of his own, but it has to be (and his is) super heavy duty and machined just right. If you are located near Portland, OR, let me know and I can direct you to him.

11-09-2011, 11:24 AM	#3
Peter J Senior Member Join Date: Jul 2010 Location: Olympia, WA Posts: 691	Re: Steering worm gear install Scott, A lot of machine shops will have a jig that should be able to do the job.

11-09-2011, 11:24 AM	#4
James Rogers Senior Member Join Date: May 2010 Location: Asheville,NC Posts: 3,104	Re: Steering worm gear install I have a jig I made that clamps the shaft just below the gear and holds it tight for the last 1/2" of pressing. It also doubles to press the gear off.

11-13-2011, 03:07 PM	#6
mrfirebird73 Member Join Date: May 2010 Posts: 77	Re: Steering worm gear install Sponsored Links (Register now to hide all advertisements) ttt

11-13-2011, 03:48 PM	#7
ajanke Junior Member Join Date: May 2010 Posts: 14	Re: Steering worm gear install I tap the end of the shaft with a 5/8 x 18 tap and then use a piece of grade 8 all thread with three washers and a nut. I tap all the way in and run the all thread in about 1 to 11/2 inches. I line up the worm, put three washers against it and then the nut. A little oil on the washers helps. I secure the shaft in a vice and then tighten the nut pulling the worm onto the shaft. There is plenty of room for the light switch rod.

11-13-2011, 09:13 PM	#8
Ned Member Join Date: May 2010 Location: Maryland Posts: 51	Re: Steering worm gear install Put the worm gear in the oven at about 300 degrees for 15 -20 minutes. It will expand and should slide on the sterring shaft. This also works with the gear on the front of the cranskshaft.

08-05-2012, 10:38 PM	#9
Robert1936 Senior Member Join Date: May 2010 Location: Sydney, Australia Posts: 109	Re: Steering worm gear install I'd be a bit worried tapping into the "shaft" to pull the worm on as this would weaken the shaft allowing it to shrink slightly when the worm slides on and the interference fit would not be so tight, IMO. robert1936

08-06-2012, 12:01 AM	#11
quickchange Senior Member Join Date: May 2010 Location: Nelson. New Zealand Posts: 2,026	Re: Steering worm gear install Like ajanke i have done several this way , A rattle gun works well , no problem with weakening the shaft by threading it , should finish flush. This method is recommended in the videos put out by Diablo Model A club , Of which our club purchased the lot to view on tec nights .

08-06-2012, 09:17 AM	#13
JoeWay Senior Member Join Date: May 2010 Location: Quincy CA Posts: 752	Re: Steering worm gear install James, that's a nice tool. Do I see some residue of valve-grinding compound applied as insurance against slipping? Joe __________________ 1929 Tudor since 1962 Feather River A's

08-06-2012, 12:11 PM	#15
Hicktick Senior Member Join Date: Aug 2011 Location: Hickory Tavern , SC Posts: 422	Re: Steering worm gear install Have you tried putting the shaft in the freezer overnite . Works for me on a lot of things that need pressed . So they said ,,,,,Pops

08-06-2012, 04:57 PM	#17
Bob C Senior Member Join Date: May 2010 Location: So Cal Posts: 9,360	Re: Steering worm gear install James, what size is your fixture, looks about 3X4X6. Thanks Bob

08-07-2012, 01:26 PM	#19
Richard/Ca Senior Member Join Date: May 2010 Location: Manteca,Ca, Posts: 368	Re: Steering worm gear install Thanks quickchange for the information on the worm gear.