Bertho Boman

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Instructions Included in the zip file are: Solid Edge files (.par) 3D model files (.stl, .igs, .stp) For detailed instructions see: vinland.com/UM_Extruder_Bearing.html The bearing can be purchased for $7.41 at mcmaster.com/#standard-ball-and-roller-bearings/=i853dw It is a Dynaroll SMR128ZZ A5 bearing. The spring has an outer diameter of 7.72mm, with 8 turns of 1.14mm wire and a free length of 20.9mm. Unfortunately, the spring does not have a part number as it was sourced from a large collection of spare parts. To measure the spring used for the Ultimaker Upgrade, both high-accuracy and simplified procedures are documented at vinland.com/Spring-Testing.html Note that the spring for the upgrade is not critical, offering a significant adjustment range. A new section has been added to cover Extruder Drive Force Measurements: vinland.com/Extruder_Drive_Force.html The long screw measures 50mm in length. To ensure proper fitment, the shaft screw should be 20mm in length as the yoke is 18mm.