Bearings, Air, Ball, Cup And Cone, Barrel, Tapered Barrel. The…
Greetings george the frozen eastern wilderness
is still wet like muskeg and will probably dry in late october before I can venture out and stock pile wood for the winter-case in point we had a fire wood delivery and the truck sank up to the drain plugs of the pumpkins-I was not happy :^(
You posting caught my attention between errands and I wanted to add a little tidbit. I was and still am a huge supporter of auto lube grease cup reservoirs in low rpm roller bearing service.
I was laughed at until they stopped losing bearings on the main belt lines -they would not use them in the screening plant and they continued to lose bearings. The 2 yahoos who did the daily maintenance wanted a situation so that allowed them to do what maintenance they wanted when they wanted or in our case lazy greasers guaranteed work.
chain drive were a lot of fun especially om the belt feeders where the double row 220 H chain would sag to the point of resting on the tail pulley guards.
As far as failures went they usually ended up changing the entire drive unit rather than a pulley assembly due to the drive set up. where they would cut the belt at the splice,unbolt the drive end and head pulley and repalce it with another one-they had no desire to send bearings out to be analyised.
Signed,
Still drying out here in the eastern wilderness ■
Watch The Greaseman!
Izaharis: Hello my frozen buddy Wayyyy up north.
Your posting reminded me of another grease - ISM.
I was trained during troubleshooting a bearing failure situation to do this little trick. Watch the greaser person.......this person is typically under rated but, HIGHLY important. A good one can save you truckloads of money and a bad one can cost you tons of money.
I was told to say nothing and just watch when the grease guy GREASED and how he greased. It is all the same right? WRONG.
We would watch guys grease with proper lube type, at proper time (MID SHIFT) and proper quantities......yet, still bearing problems were happening...Why?
Doing this as instructed, I watched with this trainer of mine and after watching he said, "So? What did you see, I said everything seems fine to me, no problem. It was pointed out to me, the guy had NO RAG IN HIS POCKET. He just went up, stuck the grease gun onto the ALEMITE OR BUTTONHEAD fitting and greased. This guy was pumping that nice VERY FINE DUST PARTICLES embedded in the grease ontop of the fitting down into the bearing and this was contributing to contamination inside the bearing and causing premature failure.
It was pointed out, this is a simple thing, yet, the good guys have a rag.....wipe off the fitting prior to greasing and have less failures because of this.
SMALL things with LARGE BENEFITS. ■
Bearings Aha!
Your response reminded me of a former coworker, When ever I was gone for what ever reason he did my job-wait this gets better, One day he was greasing a face drillhead motor bearing assembly with a water swivel with external bearings in a common shell and He was greasing away with a hand pumper until-until he was caught with an empty grease gun after 10 minutes of hand greasing-I could not stop laughing when I heard about it, at least I did not get blamed for the drill motor failure. ■
Detecting the Cause of Premature Bearing Failure
So.....you have a bearing seizure, it stops your production, ticks off your boss and generally reaks havoc on your production schedule.
We change the bearing.......but, in our haste we DO NOT find out why it failed. Most folks know this but, if you truly want an answer (Technical answer vs guessing) here is what you should do:
1. Remove bearing, leave grease inside it, wrap in garbage bag and send to supplier of bearing.
2. Ask for a beaing failure report
3. A professional bearing mfr or bearing house will have this bearing inspected and writeup a detailed report addressing the signs of failure and probable reasons for the cause of failure
It is a great thing: We get details of the damage, fretting corrosion, black or blue heat markings, spinning of inner race on the shaft or outer race which can all be easily read.
Then a report advising most likely reason for the failure is given back....IMPROPER LUBRICANT, LACK OF LUBRICANT, DIRT inside bearing, bearing installed too tightly, bearing spinning on outer race, bearing housing oversize....undersize......etc
FROM here, you can prevent the next premature bearing failure.
...................
A normal B10 bearing life on say a 6x16 3 deck screen say 120 mm diameter bearings, say 1/4" at 1050 rpm........we like to see a minimum of 10,000 operating hours assuming the unit is greased a proper intervals as per the manufacturers mtce book. You know, plus minus 2500 hrs a year type thing........If we see less hours.....we start to look for greasing problems or abuse to the bearing or other. ■