Where can i locate beveled bearings for blade spindle early models had this style as the newer mowers have roller bearing

Normally, this is caused by a bad / or worn out bearing in the blade spindle. The blade is attached to a shaft that goes thru the spindle housing, where the bearings are located, and then goes to the pulley that is driven by the blade drive belt. good luck

By loose blade I assume you mean that it can be moved up and down at the tip of the blade. It is most unlikely that the central nut has come loose, but check anyway. If this nut is tight and the shaft is loose in the bearing this means the bearing has worn out. Remove the deck from the machine. Photograph the run of the belt as this has to be removed. Also the direction of the grease nipple. Remove pulley from loose spindle. Turn deck on its edge or mount on two saw horses or similar so you can get to top and bottom of spindle bolts. Remove cutting blade. Remove spindle housing and clean area so no rubbish gets caught when reassembling. Otherwise spindle may be set different and mower will leave a line of differing cut. Take spindle to vise and remove any retaining nuts or circlips from shaft and clean as clean as new. Apply light oil or CRC etc to help move bearing along shaft. Open vise wider that outside of bearing, usually 44 to 50mm [1 3/4" to 2"] and refit nut on thread. Check nut is always spaced free of top bearing. With cushion of hardwood or nylon tap the shaft to move it down with lower bearing coming out of spindle housing. To remove top bearing from housing, turn housing up other way and use a wooden shaft such as a broom handle to tap bearing free of housing. Clean out grease and replace when reassembling. Do not reuse other bearing. They are cheap and likely to fail shortly anyway. These bearings usually have no seals on inside.

I am not familiar with Cub Cadet but would suggest that if spindle is loose [wiggles] then one or more bearings need replacing. Remove the whole deck from the machine and turn over. Check the blade [s] are firm. If not undo the nut holding the blade on and remove the spindle and its housing from the deck frame. Remove the driving pulley also. Usually these types of drives have a spindle with a special fitting on the lower end for the blades to fit onto. Some are forged on the end of the spindle and the bearings come off the other end. Others will be removeable and so the bearings will come off each end. What ever, clean up with fuel and replace both bearings. You may have to remove the seals on the inside to let grease in. Make sure the top bearing has plenty of grease as it may miss out if all the grease goes down. Some machines it is better to leave the seals on top bearing. I have found that it does not pay to use the hose connection to clean the deck as the water destroys the bearings and only half cleans the deck. Best to put planks onto trailer or ute deck and run mower up so you can get underneath with big screw driver every now and then. Take blades off and sharpen them then also.

More likely either the blade is bent or the spindle bearing are bad.

the blades should not hit only reason a blade hit a blade is if the spindle bearing is out so check that out see if there worn out should be no movement in spindle bearing side to side

Remove deck belt from blade pulleys and Tri to spin blades by hand. If they don't spin freely, you probably need new spindle bearings but if you do need a new spindle I would replace the whole spindle housing... Just make sure the one (s) you buy has housing, spindle, bearings, nut and washer.

sounds like he bent a blade that's when the belt went

Even new blades can be out of balance, but my guess would be either the other blade spindle, or the tensioner pulley bearing.

I own a DW716. My blade wobbled. I found that the small bearing on the motor end of the blade spindle had been pressed out a bit. This bearing is right behind (or perhaps attached to) the cap that shows on the motor side of gear assembly housing. I tapped it back in so it was flush to, or even a bit inset of the surface of the gear assembly housing and the wobble disappeared! Yeah! Cheap and Easy.

What bearing, what kind of tractor. If you're referring to spindle bearing for blades, then you would remove the spindle housing from the deck after removing blade. Remove bearing retainers and press shaft/bearings out. Need model numbers and brand to be of more help.