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View Full Version : The Patented "LocoLarry Centerpoint Steering Tab Jig"



SirJoey
09-14-2009, 08:21 PM
Thanx a TON to LocoLarry for sending me pics of his welding jig!
Loco was too modest to post this, so (with permission) I'm taking the initiative!

This ingenious, simple little jig makes it a snap to not only get
the centerpoint steering angle correct, it also enables one to
achieve uniformity of the 2 parts! Just brilliant!

http://img132.imageshack.us/img132/3013/kingpinanglejig3.jpg

http://img42.imageshack.us/img42/5797/kingpinanglejig4.jpg






My humble copycat version:

http://img32.imageshack.us/img32/4978/steeringtabjigjoey1.jpg

http://img509.imageshack.us/img509/2461/steeringtabjigjoey2.jpg

On mine, the edge of the board represents the centerline of the tire.
This thing helped me out TREMENDOUSLY! :D


http://img384.imageshack.us/img384/7131/sirjoeysigmedij1.gif

trikeman
09-14-2009, 08:44 PM
Beautiful work. I love jigs. As you say it makes things so much easier to get right more than once for those of us who aren't exceptionally coordinated when holding a welding wand.

Radical Brad
09-14-2009, 08:46 PM
Great stuff!
Ad when you are done, the jig becomes your seat.

Brad

SirJoey
09-14-2009, 08:53 PM
...And when you are done, the jig becomes your seat.
A distinct possibility... :D


http://img384.imageshack.us/img384/7131/sirjoeysigmedij1.gif

locolarry
09-14-2009, 10:35 PM
Awww..Shucks...
:rolleyes4:

savarin
09-15-2009, 04:33 AM
Like all brilliant ideas its so clever and simple that we all think "why didnt I think of that".
A most excellent idea, thanks.

likebikes
10-23-2009, 01:00 PM
Do you weld the steering head to the strut with it attached to the jig?
Pardon the dumbness of the question, I know that what I'm looking at is the answer I seek but I don't even know enough at this stage to ask the right questions.
I want to build a trike (haven't decided which, probably get both on a CD) and I don't want it to be crooked.

SirJoey
10-23-2009, 01:27 PM
Do you weld the steering head to the strut with it attached to the jig?
Pardon the dumbness of the question, I know that what I'm looking at is the answer I seek but I don't even know enough at this stage to ask the right questions.
I want to build a trike (haven't decided which, probably get both on a CD) and I don't want it to be crooked.No dumb questions, only dumb answers! :)
And yes. That's the whole point of the jig! :)

Well, at least TACK it solidly, anyway.
Then, you can remove it from the jig & weld it up solid!


http://img3.imageshack.us/img3/49/signaturehalloween.jpg

likebikes
10-24-2009, 05:31 PM
Thanks Sir Joey. So the jig is laid down and the strut that connects it to the frame uses one of those angles drawn on the jig and is then tacked to the steering head. The strut and steering head would then be welded to the frame.
Is that the correct idea? Would another jig be employed to do the strut to frame operation?
I'll get this eventually!

SirJoey
10-25-2009, 08:30 AM
YVW, LB.

This is just an easy method of getting the correct angle for
center-point steering, & for getting both kingpins identical.

Once you get the plans, you'll understand the rest. If not, we're here to help! :)


http://img3.imageshack.us/img3/49/signaturehalloween.jpg

PeterT
10-25-2009, 04:20 PM
YVW, LB.

Once you get the plans, you'll understand the rest. If not, we're here to help! :)

http://img3.imageshack.us/img3/49/signaturehalloween.jpg

that is if we don't need professional help ourselves!

PeterT

kevinp
11-03-2009, 02:33 PM
I just wanted to add that this jig works great, I made it today and welded up my kingpins

http://img.photobucket.com/albums/v437/kenderworld/trike/DSCF0463copy.jpg

minus the spacers
http://img.photobucket.com/albums/v437/kenderworld/trike/DSCF0464copy.jpg

And the both came out the same perfect :)

http://img.photobucket.com/albums/v437/kenderworld/trike/DSCF0462copy.jpg

Cheezy Rider
04-20-2010, 12:03 AM
Do you just offset the tab by 10 degrees?

Odd Man Out
04-20-2010, 01:49 AM
Do you just offset the tab by 10 degrees?

Cheezy
Read through the plans -- they tell you clearly how to figure the angle. It will be a bit different for each depending on size of rim and tire.

Cheezy Rider
04-20-2010, 06:35 PM
Yea I know, but I like jigs. It takes all the guess work out and helps move things along alot quicker. I figured the jig is posted, and evidentally worked good for one person, it should work for me. Can there really be that much difference between head tubes, 20" tires, and 20mm hubs, that it would make it that critical?

Odd Man Out
04-20-2010, 11:26 PM
Can there really be that much difference between head tubes, 20" tires, and 20mm hubs, that it would make it that critical?

Probably not -- it all depends on how precise one wants to be. It is one of my flaws. I set my angles at XX.22 degrees. I just sent you a PM with the real angle. Hope it helps.


Well, at least I tried -- you have elected not to receive them...

Cheezy Rider
04-21-2010, 01:00 PM
OMO: Yea, I just saw where there SHOULD'T have been a checkmark. Please try again and see if it works. It should. Let me know if it doesn't.
Thanks!

Cheezy