Fiat Spider 124 Trailing Arm Bushings
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TPU rear suspension trailing arm bushings for vintage Fiat Spiders
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Informacje o modelu
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- Printables
- Kategoria
- Automotive
- Licencja
- Open Community License v1.1 + GAtt v1 + RnD v1
These are cost effective bushings for old 124 spiders. New rubber costs ~$6/ea Poly bushings cost ~$11/ea. These cost ~$1.50/ea for me using Siraya Tech 85A TPU.
A lot of folks are understandably skeptical of using 3D printed suspension bushings. Check out Garage 54 on Youtube and saintchief_ on Instagram for some people who have done some testing/long term running of TPU bushings.
Instructions:
Press the old bearings out (I made a jig to do it with a bearing puller).
Press or cut off the rubber to salvage the inner sleeve.
Clean and de-rust the inner sleeve and mounting point in the arm.
Press in the new TPU bushing (silicone brake grease can help with that - do not get it on the inside of the TPU).
With the bushing in place, use a polyurethane based adhesive to glue the inner sleeve to the bushing. (Smear the adhesive on the outside of the sleeve and the inside of the bushing and make sure all the ribbing in the bushing is filled.)
Notes:
TPU 85A or lower hardness recommended (new rubber is ~72A).
USE 100% INFILL
95A WILL NOT WORK - it does not deform enough to be pressed in. I have not tested 90A but I suspect it will not work either
Use my jig to help with pressing the old bushings out and the new ones in.
I use Loctite PL3 Premium PU based construction adhesive for any TPU gluing
Smaller (short arm bushing) should fit the panhard bar, too - but I haven't confirmed that yet