Does 0.02mm sound like a reasonable interference for this if tests show 0.03 expansion after heating above what normal operation will experience? Smaller than this might be hard to replicate over a small production run.
It's a high RPM rotating assembly. There is a retaining nut on the shaft but I don't believe it puts enough pressure to keep the aluminum piece from spinning on the shaft. The interference fit would act as a failsafe to be sure there is no unwanted rotation.
Hello everyone,
I'm looking to do an interference fit of a aluminum hub onto a steel shaft. They are very small, the steel shaft is approximately 7.5mm
I'm not sure what alloy the shaft is but the aluminum hub is 7075. Currently the aluminum hub is large enough to slide onto the shaft tightly...
I don't have access to a proper hardness testing tool but I do have a set of hardness tester files.
With HRC50 file I think I can start seeing some fine scratches on the shaft. Using HRC55 file I can definitely scratch the shaft.
The HRC50 file has a range of 50-52 and HRC55 file 55-57 so it...
Thank you for the suggestions guys.
We don't plan to make a lot of these, less than 100 pieces, unknown what alloy the original is made of. The original version has a slight dip, sorry don't know the technical term, on the 8mm section just before it meets the 13mm section. This little "dip"...
Hi guys,
We're looking improve a small oem shaft/gear combo that has seen failures in one specific spot. It's a small shaft 13mm in diameter which has a 90 degree reduction down to 8mm. It has a gear, ~38mm diameter, at the other end of the 13mm section. We're not quite sure what kind of...
