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Old 11-07-2010, 03:46 PM   #1
subaru_steve
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Default Screw Thread patterns

I am finally working on a lathe in my major (Automated Machining Engineering) and want to try my hand at making a few shift knobs, as well as a new short throw shifter. However I don't have the size of thread I need for either.

So if someone can supply me with the following:

- Thread for the shifter knob/short throw shifter
- Size of the pivot ball of the shifter
- Depth of the threading for the shifter

I know I know, I have a shifter outside so you must be wondering why I have to ask. The previous owner bought a shifter that wasn't the right thread pattern so he decided he would crank it down as hard as he could till it would hold, needless to say it spins, wont come off, and the threads are destroyed. So I need to start from scratch with making this.

**JUST ADDED**

I want to make some knobs for some buddies.
- I just wanted to verify the M12x1.25 thread was the same for the 2.5rs and 2.5i 5MT?
- What are the dimensions of the boot collar?
- The WRX shifter and WRX Short Throw shifter both have the same thread correct?
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Last edited by subaru_steve; 11-17-2010 at 08:19 PM.
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Old 11-07-2010, 05:20 PM   #2
2006whitesti
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I believe the shifter is the same as the lug studs. To be sure try screwing a lug nut on the shifter. 12x1.25 should be right.

To measure the depth of the shift knob just remove the knob and stick a pencil in it. Make a mark when you bottom out. Pull out the pencil and measure from the end to the mark that you just made. Should give you a pretty accurate depth measurement.

Hope this helps.
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Old 11-07-2010, 05:23 PM   #3
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- Thread for the shifter knob/short throw shifter 12X1.25mm
- Size of the pivot ball of the shifter ~19mm
- Depth of the threading for the shifter All depends on how big the shift knob is. roughly 30mm?
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Old 11-07-2010, 05:38 PM   #4
subaru_steve
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Quote:
Originally Posted by 2006whitesti View Post
I believe the shifter is the same as the lug studs. To be sure try screwing a lug nut on the shifter. 12x1.25 should be right.

To measure the depth of the shift knob just remove the knob and stick a pencil in it. Make a mark when you bottom out. Pull out the pencil and measure from the end to the mark that you just made. Should give you a pretty accurate depth measurement.

Hope this helps.
Like I said, can't really take it off and see since its A) Stuck and B) threads are destroyed, haha thanks though

Quote:
Originally Posted by [email protected] View Post
- Thread for the shifter knob/short throw shifter 12X1.25mm
- Size of the pivot ball of the shifter ~19mm
- Depth of the threading for the shifter All depends on how big the shift knob is. roughly 30mm?
Awesome, thank you!
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Old 11-08-2010, 09:55 PM   #5
subaru_steve
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Read "Just Added" Thank You!
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Old 11-16-2010, 06:46 PM   #6
subaru_steve
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Bumpedy Bump
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Old 11-17-2010, 08:20 PM   #7
subaru_steve
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Anyone have the "Just Added"? Need the Collar Dimensions

Thanks!
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Old 11-17-2010, 10:37 PM   #8
tobylazur
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standby

Here's roughly what I used:


for this:

Last edited by tobylazur; 11-17-2010 at 10:49 PM.
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Old 11-17-2010, 10:56 PM   #9
subaru_steve
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^ Thanks Man!

I saw a post of your shift knob somewhere on this forum, I just don't have a shift knob with the boot collar, helps a ton man!
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Old 11-17-2010, 10:58 PM   #10
tobylazur
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no problem. You're just lucky I already had the drawing done. Let us know how it turns out.
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