Warco Major Mill/Drill

thankyou to.... `not done it yet `,,what he said got me thinking , along with asking the guy at the bearing services shop as he said just put a small amount of grease inside just enough to let the rollers turn, not too much as it causes heat ,,,!!!!! he could be right too much grease on that bottom bearing would stop the rollers from turning in the race ,they would just slide ...,well I took the whole lot to bits again ,wd 40 cleaned the bearings up ,and applied some good engine oil ,put it back together and magic ,, I ran it for half an hour and it stayed cool ,,brilliant.

then I put the oil seal on last ,and you wouldn't believe it ,the shaft started warming up because the oil seal against the shaft is rubbing constantly ,so I took the spring out of it to relieve its tension ,and it works fine ,,its really now just there to stop chippings getting into the bearing .

you live and learn eh ,,them you tube videos showing a guy smothering the inside of a roller bearing with grease ,,,,,mmm bad idea ,you`ll get all the problems I got

thanks guys for all the help,it gets you thinking ,to get a result

mike

It's sometimes worth washing a suspected bearing in petrol, allow to dry, then spin it with your finger through the shaft hole. a shot bearing will catch or 'trip up' a good one will keep going.

Thanks Dave I shall bare that in mind , if I'm dissembling bearings again , of course I shall monitor the work I've done and check the mill regular ,, for the moment I'm just going to get on and using the mill , I've made engines on and off for many years now , and recently made 6 oscillating all aluminium engines ,, all my own design ,and done on the boxford ,, I also make what I call engineering sculpture paintings made from copper and brass and steel to hang on the wall ,, they are well liked and a pleasure to make .

Mike

Regarding heat in bearings, there is too much in them. Have a look at SKF regarding lubrication and quantities. I know from many years in design off machine spindles that too much lubrication can cause more problems than too little. Heat is generated by the grease not allowing the balls or rollers to rotate properly, if you think of the wife's cake mixer and the difference between rotating in a liquid and in a stiff cake mix. We used to design spindles rotating at all speeds up to 8000 rpm and believe me it became a science over the years with lubrication methods, bearings and seals.

Howard

That's the problem ,, too much grease , amazing ,you try to grease them up thinking your doing the right thing . must have just stopped the rollers turning properly and I presume they were just rubbing ,, friction causing heat .. Of course this being the bottom roller bearing on a vertical shaft, has to be preloaded right to get those bottom bearings running , don't think so much of a problem on my lathe bearings ....anyway thanks All that helped me

Mike