FMS Ridge Racer U4 Upper Control Arm
Print Profile(1)
Description
Broke my upper control arm on my FMS Ridge Racer U4 while bashing. Replacement parts are near impossible to get.
Made a 3D printable replacement due to impatience with shipping.
12-8-2025: v3 uploaded. Removed inset face to decrease stress points. Still working on ideal print orientation. This so far has been heavily dependent on the material. PETG, ABS, and PA have held up differently in different orientations.
Replaces part number APSC71107. Uses OEM spindle ball joint APSC71002.
MATERIAL TESTING CURRENTLY IN PROGRESS 12/8/2025
Current methods and materials being tested:
Theory: Fiber filled Nylon may be too “stiff” and has a greater chance of snapping. Exploring non-fiber filled nylons to allow some flex for energy absorption.
- PETG (Held up better than ABS, still broke after some decent-ish >14in jumps)
- PA12 SLS Printed (TBD)
- PA12-GF SLS Printed (TBD)
- ABS (Brittle, didn't last long on very small <12in jumps)
- ASA (TBD)
- Fiberon PA612-CF15 (Better than ABS but still “fragile”)
- Fiberon PA612-CF15 Annealed (WIP) - Annealing completed, currently in Moisture Conditioning. Testing will happen Thursday 12-11-2025
- CNC Aluminum (I mean, I would love to, but I don't got small batch CNC aluminum $$. Maybe one day?)
PETG or PA Currently recommended.
Retaining pin retaining screw self threads into the 3D printed part.
Ball joint is hard to press in, but can go in. It is slightly loose on the tolerance to prevent any binding with layer lines or printing defects.
License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.
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