Makerbot Replicator 1 & 2 Delrin Plunger Extruder Upgrade Kit - Bearing Replacement
This is the latest upgrade kit for the Delrin Plunger. It can be used for many RepRap based 3D printers including Makerbot Replicator 2 and 1. - If you are experiencing print failures every time you use a new filament, that is because of the existing plunger on your extruder that cannot adapt to the diameter tolerance of the cheaper filaments. I have had issues even with some of the Makerbot filaments, but this upgrade will solve this issue. - You are buying a Makerbot Delrin Plunger replacement kit/Extruder Upgrade kit as shown in the first image. This is a picture of the actual item you will get (it does not include the stepper motor/drive gear).  This kit includes everything needed to replace the delrin plunger on your Makerbot Replicator 2 and 1 with a spring-loaded ball bearing assembly. - There are two models:      1- PU manual cast (not printed, not injection molded). It has much higher resistance to heat compared to PLA or ABS.      2- Printed (Printed in PLA with makerbot) Each unit has been tested separately. - One-piece arm with a stainless steel holder and ball bearing, so no worries about wear of the bearing holder after few hours. - An aluminum bushing has been replaced with the 3d printed plastic pivot in the existing products for a maximum durability.Specification:      PU Model: Base; PU, 65 shore D. Arm; PU, 72 shore D.     Printed Model: Base; PLA 100% infill, 0.15 mm layer. Arm; PLA 15% infill, 0.15 mm layers.   AssembledThis kit includes:The Back PlateThe Swing Arm14mm flat-top hex screws - for the pivot joint of the swing arm10mm aluminum bushing - for the pivot joint of the swing armTwo 10mm flat-top hex screws - One to mount the back plate to your stepper motor (Top Right hole on the back plate) and the other to mount the ball bearing inside the swing armNew Stainless Steel Ball BearingNew Compression Spring - You will receive random color parts