I'm designing something that requires a spindle but I can't tell you what it is so lets just say the requirements are the same as if it were going to be used as a mower blade spindle. The questions I have are as follows: 1. who's brand spindle lasts the longest and about how many hours would it last? (assuming it were greased when/if needed) 2. is it a greasable spindle or is a sealed non-greasable unit? 3. if you know...does it have tapered bearings or ball bearings? 4. If they are tapered bearings are they Timken brand? 5. how long is the MFG warranty? 6. Does the blade bolt go through the whole spindle shaft (nut on top) or does it thread into the shaft? Thanks so much for the help!