- Joined
- Aug 6, 2013
- Messages
- 333
I think you can always keep spending a little more and justify the cost in your head. I guess you're better getting it right the first time instead of wishing you had gotten something else. Bigger is usually better but both are very close in work envelope. the 833 actually has the larger work envelope and by the time you add the stand with chip tray, the price is about the same. The 835S is an actual knee mill which is definately beefier and heavier. If you do a lot of aluminum the slower rpm could be a bit of a limitation but it depends on the end mill size. I'm sure there is plenty you can accomplish at 1500 rpm, but I'd rather have more avail. Are there any other motor/pully options avail?With either you could always make some mods down the road that would increase the rpm like a VFD and higher RPM motor. Higher rpm and easy variable rpm is nice to have. I know on some mills it's a pretty easy task to throw in a new motor and add a VFD which could easily get you 4k-5k rpm and the imported VFDs and motors are pretty reasonably priced. But heck you're gonna want DRO's, Power Feed or to convert it to CNC anyway so whats a few buck more!