Spohn 743-DS - Manual (Page 3)

Part# DS34TB-RH Del-Sphere ™ Pivot Joint Instructions & Notes
The Del-Sphere™ pivot joints are slightly greased for assembly purposes. The bushings inside
of the Del-Sphere™ pivot joints are made of Delrin®, which is self-lubricating. We do not
recommend greasing the pivot joint any further than as it is supplied as further grease will
only attract and retain dirt and grit. The pivot joints are equipped with grease fittings simply
because we know certain customers would want/request them no matter what we say.
Our Del-Sphere™ pivot joints are 100% rebuildable. We doubt you will ever need to rebuild
them, but they certainly can be. The Delrin® bushings should last the life of your vehicle. To
disassemble the joint remove the snap ring using a snap ring pliers. Re-assembly will required
the use of a press (or vise) to push the bushings in hard enough to be able to re-install the
snap ring.
Dimensions: This Del-Sphere™ assembly must be mounted inside of a minimum 1-9/16” i.d.
mounting bracket to insure the housing does not contact the bracket at full rotation. The joint
will provide for 22° of articulation. The housing has a 2.05” outside diameter and is 1.20”
wide. The ball is 0.875” wide and has a 0.75” through hole. The thread length is 2.50” and the
size is 3/4”-16. The overall length of the joint end to end is 4.92”. The length from the center
of the ball hole to the start of the threads is 1.50”. The length from the center of the ball hole
to the end of the threads is 4.0”.
What is a Del-Sphere™ pivot joint? Think of the Del-Sphere™ pivot joint as a Delrin®
bushed spherical rod end. Designed and manufactured exclusively by Spohn Performance, we
have taken suspension performance to the next level. This Del-Sphere™ pivot joint features a
one piece forged and heat treated 4130 chrome moly housing, a heat treated and hard
chrome plated chrome moly spherical ball, Delrin® bushing races, heat treated retainer
washer and snap ring, an external grease fitting, and a beautiful silver zinc plated housing
finish. The Delrin® bushing races absorb shock and road noise so you get the quiet and
smooth ride of a bushing as well as 22° of rotation!
What is Delrin®, and why did you choose to use it? Delrin® is an acetal homopolymer
made by DuPont. It is characterized as having an excellent combination of physical properties
that make it suitable for numerous applications. With extremely low moisture absorption and a
low coefficient of friction (self-lubricating), Delrin® is uniquely tailored for wear applications in
high humidity or moisture environments. Delrin® will maintain constant physical properties
under high moisture conditions and out-perform Nylon or polyurethane under these conditions.
Delrin® has a 10,000 psi tensile strength and a 120 Rockwell Hardness rating making it ideal
for our Del-Sphere™ pivot joint application.
Replacement Parts:
Part # Description
DS34TB-RH Forged Del-Sphere™ Assembly - 3/4"-16 RH x 3/4" Bore
DS34TB-Wash Track Bar Del-Sphere™ End Washer
DS34TB-SR
Track Bar Del-Sphere™ Snap Ring
DS34TB-Bush Track Bar Del-Sphere™ Delrin® Bushing (2 per assembly)
DS34TB-Ball
Track Bar Del-Sphere™ Hard Chrome Plated Spherical Ball