tap and die size for the swing arm pivot bolt and the frame

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justdave
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tap and die size for the swing arm pivot bolt and the frame

#1

Post by justdave » Sun Aug 23, 2009 2:02 pm

Hello all, anybody know the tap and die size for the swing arm pivot bolt and the frame where it fits into on a '58 FL. Thanks. DaveZ



Bigincher
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Re: tap size

#2

Post by Bigincher » Sun Aug 23, 2009 3:01 pm

Hello Dave. Looks like 5/16"x18tpi. Check this page out of the parts catalog. Sorry about it being sideways, had to do that to fit the upload parameters here. You can copy it and rotate it back. Hope this helps.
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hplhd
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Re: tap size

#3

Post by hplhd » Sun Aug 23, 2009 3:15 pm

dam tom i had to turn my monitor on its side.
Last edited by hplhd on Sun Aug 23, 2009 4:58 pm, edited 2 times in total.

panhead
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Re: tap size

#4

Post by panhead » Sun Aug 23, 2009 3:29 pm

1958 Frame.jpg
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Bigincher
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Re: tap size

#5

Post by Bigincher » Sun Aug 23, 2009 4:58 pm

hplhd wrote:dam tom i had to turn my monitor on its side. this is rich(nuklhd) by the way.
Hey Rich, fancy meeting you here!

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Re: tap size

#6

Post by RUBONE » Sun Aug 23, 2009 6:40 pm

The thread is 5/8 x 18. It is a standard configuration available everywhere.
Robbie

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Re: tap size

#7

Post by FlatHeadSix » Mon Aug 24, 2009 3:25 am

Robbie is correct, the parts book is wrong (at least that version is). It shows that item #14, the nut that fits on the pivot bolt, is a 5/16 x 18 with a 15/16 hex. Whoa, that would have to be one tough 5/16 bolt to handle that!

I think I would go with the 5/8, it wouldn't be the first time they made a mistake in the parts book.

mike

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Re: tap size

#8

Post by panhead_kicker » Tue Aug 25, 2009 2:03 am

the nut that fits on the pivot bolt
Am I silly or what? What's that nut for? A longer pivot bolt and a stripped out frame?

Panacea
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Re: tap size

#9

Post by Panacea » Sun Aug 30, 2009 2:33 am

V-Twin makes a special pivot bolt for stripped out frames. It's on page591 in the catalog...Mike

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Re: tap size

#10

Post by Bigincher » Sun Aug 30, 2009 2:48 am

FlatHeadSix wrote:Robbie is correct, the parts book is wrong (at least that version is). It shows that item #14, the nut that fits on the pivot bolt, is a 5/16 x 18 with a 15/16 hex. Whoa, that would have to be one tough 5/16 bolt to handle that!
I think I would go with the 5/8, it wouldn't be the first time they made a mistake in the parts book.
mike
I agree, sure looks like a typo to me...!

Cotten
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Re: tap size

#11

Post by Cotten » Sun Aug 30, 2009 3:41 am

All the Panheads I have known screwed into the frame, not a nut.
And a helicoil fixes a stripped frame quite well.

It appears to be a string of typos, as even my '65 book lists the phantom "5/16-18" nut.
That's a lot of years to leave a misprint!

Other places where the 7980 nut is used lists the correct 5/8-18.

Perhaps some of the confusion arose from the fact that the pivot bolt itself is fabricated with a nut welded upon it.

...Cotten

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Re: tap size

#12

Post by panhead_kicker » Sun Aug 30, 2009 4:13 am

It appears to be a string of typos, as even my '65 book lists the phantom "5/16-18" nut.
That's a lot of years to leave a misprint!
You still stand by that star hub diagram Cotten? <grin>
Sorry, I had to do it! I was trying to figure out what the nut was for myself.

Cotten
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Re: tap size

#13

Post by Cotten » Sun Aug 30, 2009 2:57 pm

panhead_kicker wrote: You still stand by that star hub diagram Cotten? <grin>
Sorry, I had to do it! I was trying to figure out what the nut was for myself.
Certainly.

At least the hub has alternative diagrams, such as the Armored School Handbook, to verify it.
Have we any alternative swingarm diagrams?

By the way, does anyone know off-hand the difference between '58-'62 47500-58 swingarms and '63-'72 47500-63 units?

...Cotten

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Re: tap size

#14

Post by Bosheff » Sun Aug 30, 2009 4:49 pm

It seems to me that some sort of gusseting or strengthing was done to the swing arm.

indianut
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Re: tap size

#15

Post by indianut » Sun Aug 30, 2009 11:04 pm

Cotten wrote:
By the way, does anyone know off-hand the difference between '58-'62 47500-58 swingarms and '63-'72 47500-63 units?

...Cotten
I believe it is the Grease Fitting?

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