Because my machine is still not assembled I spent about 4 hours measuring the V wheels I received. First thing I did was make up a go no go plug that fits the wheel bore. Then using a depth micrometer I measured from the top of the wheel down to the plug and then from the top of the wheel down to the top of the center rib. By subtracting one for the other I got the width of the center rib that according to the drawing I downloaded from Inventables.
Drawing says rib should be 1.0mm +.0 -.08. so the rib can be .92 to 1 mm.
I measured all 20 V wheel my highest reading was 1.092 mm and lowest was .939 mm with an average of 1.00498mm. 10 of the wheels were greater than 1.0mm and 10 were less than 1mm.
I also measured all the washers that go between the bearings on assembly. They are sold as 1mm thick. All washers were greater than 1mm high was 1.03 and low was 1.01 with average of 1.0177.
I also measured all the ODs of the 40 bearings. They are sold as 16 OD 5 ID and 5 thick.
All bearings were less than 16mm high was 15.99 and low was 15.95 with the average being 15.9695.
My go nogo guage has a small end of 15.93mm for go and 16.0 for no go. All wheels fit the go side and none were loose on the no go side. Specs from the drawing show a bore of 15.95 +0.026 -0.026 this gives a small ID of 15.924mm and none of my wheels were tight at 15.93mm of my gauge plug.
Conclusion is that 10 of my wheels would slide on the bearings and 10 would not.
Here are photos of the operation.
