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Bertho Boman
By Bertho
Instructions
Included in the zip file are:
.par =Solid Edge
.stp
.igs
.stl
For detailed instructions see:
vinland.com/UM_Extruder_Bearing.html
The bearing can be found here for $7.41:
mcmaster.com/#standard-ball-and-roller-bearings/=i853dw
It is a Dynaroll SMR128ZZ A5
The spring OD is 7.72mm, has 8 turns of 1.14mm wire, and a free length
of 20.9mm. Sorry, I do not have any part number since it came from my
big junk box...
Since I needed to measure the spring used for the Ultimaker Upgrade I
documented the steps both for a high accuracy measurement procedure and a
simplified one.
vinland.com/Spring-Testing.html
Note, the spring for the upgrade is not critical. There is a tremendous adjustment range.
I added a section on Extruder Drive Force Measurements:
vinland.com/Extruder_Drive_Force.html
The long screw is 50mm.
The shaft screw needs to be 20mm since the yoke is 18mm.
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