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Reinforcing Clutch Fork

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Old 08-28-08 | 11:24 PM
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Reinforcing Clutch Fork

Stold this mod shamelessly from DeSlow. I liked the way his turned out, so I copied it. Probably overkill, but I don't want to worry about it down the line somewhere. This dude should stand up to even the angriest pressure plate. I've read that the pivot ball is the weak link, so I already have one drafted up in solidworks.

Doing this is much easier than it looks. Talked to my boss at the fabrication shop about how to cold bend the rod. Once he showed me how to do it with two cresent wrenches, it was all money. Just takes a little patience.

I started out by bead blasting the fork to ensure it was clean. I used 1/4" 304 ss square stock which fits perfectly in the clutch fork fingers. Then, I layed the rod in the fingers, and just marked the bend locations, one at a time and went down the line. Fitting time was only about 1/2 hr per side. You have to notch the rod to fit around the location of the slave cylinder rod, which I did with a drum roll. I also left some space at the finger end for the weld to wrap around. Finally, just skip weld the rods in place giving the piece lots of time to cool to keep it from warping. Made sure not to weld the outer edges of the fork fingers so the throwout bearing tabs have a nice flat place to sit.

Viola........bomb proof clutch fork.
Attached Thumbnails Reinforcing Clutch Fork-clutch-fork-bending.jpg   Reinforcing Clutch Fork-clutch-fork-mark-bends.jpg   Reinforcing Clutch Fork-clutch-fork-mock-up.jpg  
Old 08-28-08 | 11:26 PM
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More pics.....
Attached Thumbnails Reinforcing Clutch Fork-clutch-fork-1.jpg   Reinforcing Clutch Fork-clutch-fork-2.jpg   Reinforcing Clutch Fork-clutch-fork-3.jpg   Reinforcing Clutch Fork-clutch-fork-4.jpg   Reinforcing Clutch Fork-clutch-fork-5.jpg  

Old 08-28-08 | 11:26 PM
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Looks nice. Make sure you post up some pictures of your super pivot ball when it's done.
Old 08-28-08 | 11:40 PM
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4-sho. I'll post the drawing incase anyone else wants to have one machined too.
Old 09-03-08 | 04:44 AM
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BA......cant wait to see the final pics
Old 12-16-08 | 10:11 PM
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Waiting on the picture of your small ball
Old 12-17-08 | 08:23 PM
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Why stainless rod? Aren't you then welding dissimilar metals? What was the weldment made of? Does the fact that it was TIG makes these questions moot?
Old 12-18-08 | 09:37 AM
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Originally Posted by HotRodMex
Why stainless rod? Aren't you then welding dissimilar metals? What was the weldment made of? Does the fact that it was TIG makes these questions moot?
They are both "steels" so they are actually considered similar materials even if one is stainless and one is not. You can use Welding Rod 308 or 309 to weld regular steel to stainless steel with great results.

OP want to confirm?

Chris
Old 12-20-08 | 11:05 AM
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10-4. 308 or 309 rod and it's good to go.
Old 12-20-08 | 08:03 PM
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The model of the "super pivot ball". The cross sectional area of the shaft is 56% larger than stock. I'm thinking 4140 steel hardened to RC 58. Haven't had it made yet though.
Attached Thumbnails Reinforcing Clutch Fork-povit-ball-1.jpg   Reinforcing Clutch Fork-povit-ball-2.jpg  
Old 12-20-08 | 11:00 PM
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Those, I would think would sell like hot cakes - your *****. The re-enforced clutch fork wouldn't be worth your time to make a tone of mainly becuase of the cheapness of the FC crowd. The ***** however, I would post up and see how many people would be interested. I would put my name down for sure. Economies of scale cold get you yours cheaper and make a few bucks while doing it. Just a thought though.

PS - Excellent welds
Old 12-25-08 | 03:28 PM
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Originally Posted by HotRodMex
Why stainless rod? Aren't you then welding dissimilar metals? What was the weldment made of? Does the fact that it was TIG makes these questions moot?
It's perfectly fine. But if you're very particular you would use 309L. Anyway, I have nothing to do right now so here's my speach.

308L (including ER308LSi) is predominately used on austenitic stainless steels, such as types 301, 302, 304, 305 and cast alloys CF-8 and CF-3. For high temperature applications such as in the electrical power industry, the high carbon 308H electrode provides better creep resistance than does 308L.

316L (including ER316LSi) filler metal should be used with 316L and 316 base metals. CF-8M and CF-3M are the cast equivalents of 316 and 316L, respectively.


Use 309L (including ER309LSi) when joining mild steel or low alloy steel to stainless steels, for joining dissimilar stainless steels such as 409 to itself or to 304L stainless, as well as for joining 309 base metal. CG-12 is the cast equivalent of 309. Some 308L applications may be substituted with 309L filler metal, but 316L or 316 applications generally require molybdenum and 309L contains no molybdenum.

Type 347 stainless steel filler metal is ideal for 347 and 321 base materials because it matches these stabilized grades. CF-8C is the cast equivalent of 347. Type 347 filler metal is also suitable most 308L filler metal applications.
Old 12-25-08 | 05:07 PM
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I would also be intersted in the asking price of these parts.If you figure it out let me know i may even purchase a pair.Thanks!!
Old 01-17-09 | 02:18 PM
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The rare thing here is the pivot ball. The clutch fork can be done at any local fabrication shop.
Old 01-17-09 | 10:30 PM
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im down for cool *****
Old 06-07-09 | 07:29 PM
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Here's some pictures of my *****. Stock vs. Super Pivot Ball. It goes to heat treat tomorrow.
Attached Thumbnails Reinforcing Clutch Fork-pict0281.jpg   Reinforcing Clutch Fork-pict0279.jpg  
Old 07-07-09 | 05:51 AM
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sell me one of them *****
Old 07-07-09 | 10:35 AM
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I'd be interested in one of those as well!!
Old 07-07-09 | 11:12 AM
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I'd like to get my hands on your *****.
Old 07-07-09 | 05:46 PM
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i would also like to have some of those *****
Old 07-07-09 | 06:05 PM
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so your saying my stock ball could break one day? how
Old 07-07-09 | 08:09 PM
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From: Ft Worth, Tx
Originally Posted by maac0953
so your saying my stock ball could break one day? how
From what I have read on this forum, they tend to break at the skinny part of the shaft, directly under the mushroom tip when using a heavy pressure plate. Never had any experience with it myself, but I'd rather not take the chance.
Old 07-07-09 | 08:13 PM
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From: Ft Worth, Tx
Let me see what I can do about getting some more made..........
Old 07-08-09 | 10:21 AM
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Originally Posted by maac0953
so your saying my stock ball could break one day? how
As he said, when you're using a super heavy duty PP (the most usual culprit is ACT's "extreme" version) that pivot is under alot of stress and will have the head pop off occaisionally

Originally Posted by 13brenova
Let me see what I can do about getting some more made..........
Sweet
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