Rotary Engine Pilot Bearing & Seal Tool (RX-7 12A Engine)

thingiverse

I whipped this up in a hurry because I was replacing the clutch in my RX-7 and needed to swap out the pilot bearing and seal quickly. I figured it would be a good idea to have someone hold the bearing and position it just right into the eccentric shaft, making sure there's enough room for the pilot bearing seal. Place the bearing on the small end of the tool and push until the large diameter is flush with the end of the 20mm bore in the eccentric shaft. This sets the bearing depth exactly as needed. Next, place the seal around the small end of the tool, then insert it into the bearing that's already been set in place. Drive the seal until its diameter is flush with the end of the eccentric shaft. By extending into the bearing already in position, this method will help drive the seal squarely and securely into the eccentric shaft. Don't try to install the seal and bearing at the same time! The seal will get crushed beyond recognition. This technique might just work for 13B engines, but I've got no way to verify it. As long as the taper depth in the end of the eccentric shaft is identical to that of my 12A engine, this method should set the bearing to the correct depth (5mm -0.0/+2.0mm below the start of the 20mm ID after the taper). Printer Settings Printer: Velleman K8200 Rafts: It doesn't matter Supports: Yes Resolution: 0.2mm Infill: 25% Notes: Printed with the small diameter facing up, supports for the big end.