| Gallery, Projects and General > Project Logs |
| Homebrew TS mill spindle |
| << < (3/4) > >> |
| Steenkamp:
Hi Guys Thanks for the sound advice. Pekka, i will probably just use some highspeed grease. Phil, how do you keep your spindle from being pulled down into the cut if you have a floating bearing at the top? Or am i going to the doctor before falling out the tree? Did you run a bit of I understand what you mean with preload increasing and was worried about that with my configuration. |
| Steenkamp:
Phil ,sorry, that one was sent waaayyy to soon. What i wanted to ask was whether you ran a bit of preload on your top deepgroove bearing to keep the spindle from moving in deeper sidemill cuts |
| PekkaNF:
--- Quote from: Steenkamp on June 03, 2015, 12:04:15 AM ---Phil ,sorry, that one was sent waaayyy to soon. What i wanted to ask was whether you ran a bit of preload on your top deep groove bearing to keep the spindle from moving in deeper side mill cuts --- End quote --- Hmm... on this bearing arragement double angular contact bearings should take all the machining forces. It is a textbook example an proven to work http://www.skf.com/binary/21-3587/1__en__001_0212_tcm_12-3587.jpg http://www.skf.com/group/products/bearings-units-housings/ball-bearings/principles/application-of-bearings/bearing-arrangements/index.html I see what you mean, but the way I have seen, the preload in a single nonlocated bearing is used only if bearing is not loaded enough, here is a belt drive, that should give the bearing minimun load it needs. http://www.skf.com/group/products/bearings-units-housings/roller-bearings/principles/selection-of-bearing-size/dynamic-bearing-loads/requisite-minimum-load/index.html In order to this tail end bearing taking a significant cutting force the arbor should deflect and A/C bearings would yield or move, neither is desirable. I think.....I'm electrical engineer not bearing engineer :lol: Pekka |
| philf:
--- Quote from: Steenkamp on June 03, 2015, 12:01:56 AM ---Hi Guys Thanks for the sound advice. Pekka, i will probably just use some highspeed grease. Phil, how do you keep your spindle from being pulled down into the cut if you have a floating bearing at the top? Or am i going to the doctor before falling out the tree? Did you run a bit of I understand what you mean with preload increasing and was worried about that with my configuration. --- End quote --- Hi, The double row a/c bearing is clamped in the housing and there is sleeve between the inner races the a/c bearing and the deep groove bearing. (On the version with two deep groove bearings there is also a spacer between both bearings). The nuts on top clamp everything together. The a/c bearings have the preloaded built in - the outer races just need clamping together. The wavy washer just preloads the deep groove bearings. Phil. |
| Steenkamp:
Thanks guys, now its clear! Will be back home next week, so will put onto practice what i have learnt from you! |
| Navigation |
| Message Index |
| Next page |
| Previous page |