Timeline for Interference fit advice for permanent assembly
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 14, 2020 at 11:19 | comment | added | Phil Sweet | No, my chance would have been the '88 Olympics, but the Air Force wouldn't release me to give it a shot. I did ask, though. | |
| Nov 14, 2020 at 5:31 | comment | added | Solar Mike | @PhilSweet did you meet Chris Boardman? | |
| Nov 14, 2020 at 5:11 | comment | added | Phil Sweet | I used to race, and I have snapped cranks and bent pedal spindles on hill climbs. Back when I weighed 135 pounds, I could leg press 1000 pounds and calf curl 740 pounds. (21 inch thighs, 25 inch waist, really hard to find pants.) So I would look pretty hard at the cyclic loading issues. People make about the same peak torque as a school bus diesel engine. | |
| Nov 14, 2020 at 4:37 | comment | added | Drew♦ | You may be able to heat the crank, or cool the spindle and then slip fit (aka shrink fit). I would just do it and test one. | |
| Nov 13, 2020 at 12:39 | comment | added | jko | Look up shafts press fit into hubs and their retention forces. For a mostly hollow 1" diameter steel shaft in an aluminum hub with 0.001" interference you get about 3,600 psi of pressure at the interface. | |
| Nov 13, 2020 at 10:35 | comment | added | Jonathan R Swift | You say "moderate forces" - have you quantified the forces? | |
| Nov 13, 2020 at 6:57 | comment | added | Solar Mike | Look up limits and fits - these are well documented. | |
| Nov 13, 2020 at 5:40 | history | asked | BetterSense | CC BY-SA 4.0 |