Making my own offsets
Moderator: Eric Wallgren
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Frank Henn
- Posts: 110
- Joined: Fri Jan 30, 2004 4:41 pm
- Location: Jacktown Misahippie
- Contact:
Making my own offsets
I've been looking for some specs or anything so I can make my own offset trucks. Anyone have something to go by?
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Eric Wallgren
- Geezer-X
- Posts: 67
- Joined: Tue Jan 07, 2003 1:00 am
Offsets.
What a huge pain in the ass.
I applaud you, though, so here goes. What you're trying to do, is to relocate the centerline of the axle as close as possible to the intersection of the axis of rotation of the hanger about the kingpin, and the centerline of the kingpin.
Starting with a Tracker or Indy hanger, face the ends square, leaving the OEM axle untouched, taking the hanger down to about 75mm.
Make your offset links from steel. I like 1020 bar .250x.750.
Drill @ 19/64 and ream to a final diameter of .312 for the hanger ends, .315 (8mm) on the other ends.
Make your stub axles from 8mm 4140 CrMo, or cut 8mmx1.25 bolts to length. You'll need to make shouldered spacers to get your wheels away from the links. I use 1/2" mild steel tubing faced to length @ 9.5mm.
Make a fixture which will hold the link and stub axle in alignment.
Make a fixture which will hold 2 links and a hanger in alignment.
Countersink the .312" dia holes in the links @45*, .10" deep. Cut the axles in the hanger off @ .200
using your fixture, Tig (preferably) or Mig weld the links to the stubs. I recommend assembling the complete truck including wedged risers to assure that you're getting the links on @ the correct angle.
Dress the welds with a die grinder/scotchlock disc
using your other fixture, silver braze the axles and spacers to the links.
Clean up the joints with a wire wheel.
Use a lathe or drill press to hold one axle while rotating the hanger about that axis. Tweak as necessary.
OR-
Just buy one from Chicken @ Pocket Pistols.
What a huge pain in the ass.
I applaud you, though, so here goes. What you're trying to do, is to relocate the centerline of the axle as close as possible to the intersection of the axis of rotation of the hanger about the kingpin, and the centerline of the kingpin.
Starting with a Tracker or Indy hanger, face the ends square, leaving the OEM axle untouched, taking the hanger down to about 75mm.
Make your offset links from steel. I like 1020 bar .250x.750.
Drill @ 19/64 and ream to a final diameter of .312 for the hanger ends, .315 (8mm) on the other ends.
Make your stub axles from 8mm 4140 CrMo, or cut 8mmx1.25 bolts to length. You'll need to make shouldered spacers to get your wheels away from the links. I use 1/2" mild steel tubing faced to length @ 9.5mm.
Make a fixture which will hold the link and stub axle in alignment.
Make a fixture which will hold 2 links and a hanger in alignment.
Countersink the .312" dia holes in the links @45*, .10" deep. Cut the axles in the hanger off @ .200
using your fixture, Tig (preferably) or Mig weld the links to the stubs. I recommend assembling the complete truck including wedged risers to assure that you're getting the links on @ the correct angle.
Dress the welds with a die grinder/scotchlock disc
using your other fixture, silver braze the axles and spacers to the links.
Clean up the joints with a wire wheel.
Use a lathe or drill press to hold one axle while rotating the hanger about that axis. Tweak as necessary.
OR-
Just buy one from Chicken @ Pocket Pistols.
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Terry Kirby
- Team RoeRacing
- Posts: 529
- Joined: Thu Aug 22, 2002 2:00 am
- Location: Hampton, NH USA
-
Frank Henn
- Posts: 110
- Joined: Fri Jan 30, 2004 4:41 pm
- Location: Jacktown Misahippie
- Contact: