View Full Version : itsy-bitsy bearing

jack d
01-22-2005, 11:16 AM
Hi all,
Thought I would share this with ya.
This is off the drive end on a flailing drum for Prolerized New England, an automotive recycler down by the shop.
Its a 24"od,14"id, double row angular bearing weighing I guess about 400 and change.
Im welding up the id of the housing, and re-machining.
There are a series of hammers, 4 foot high, hinged,in a dogbone config., ea. one weighing approx. 5-700 lbs. on the driven end.
This bad boy, when its up to speed, will reduce a full size car to matchbook size bits in seconds.
Quite the sight.


01-22-2005, 11:39 AM
Pretty Cool!! Looks like the base of a small radial drill or a Cincinnati Bickford drilling machine in the background. What are you gonna remachine on IT?

01-22-2005, 11:43 AM
Wow! Now all you need is teenie weenie shaft!

jack d
01-22-2005, 11:50 AM
Its going up on a Bullard 4" HBM.
Im gonna take a chip out of the bore to clean it up round, weld a pass, and rebore .003/.005 under and shrink er in.
Thats an american hole-wizard in the background.
Anybody got a little brass hammer I can use in case I get it stuck halfway in the bore? http://bbs.homeshopmachinist.net//smile.gif

01-22-2005, 12:11 PM
PRAY-YOU-DON'T!! I figured you'd spray instead of weld. Should fall in with 3-5 tho. but in case it don't...Got a big press? Make that Really Big!

jack d
01-22-2005, 12:25 PM
Yep, got one outside that we used to straighten grout augers for the big dig a little while back.
Its for sure a check three times and check again situation before I assemble it.

Spin Doctor
01-22-2005, 12:49 PM
Anybody uses a brass hammer or punch on bearings in my shop gets castrated pronto

jack d
01-22-2005, 01:14 PM
Would those be "ball" bearings? http://bbs.homeshopmachinist.net//smile.gif

Paul Alciatore
01-22-2005, 03:44 PM
Looks like rollers to me.

Here's a really big ball bearing:


The drill is a #54 and the ruller divisions are 1/16s.

Came out of a roller in a VTR. I suspect there are much smaller ones in standard sizes.

Paul A.

[This message has been edited by Paul Alciatore (edited 01-22-2005).]

01-22-2005, 09:12 PM
In olden days of mechanical/electro-mechanical aircraft instruments, some very small bearing were utilized.
Much fun to clean/lube.

01-22-2005, 09:31 PM
Jack,I did a 9" bore bearing on gravel classifier.Old bearing locked up and spun in the bore.I welded it up and turned it out on a lathe,pressed the bearing back in,job done right?Wrong,two weeks later same bearing locked up,reason?Idiots had loaded the plants grease guns with Cosmoline instead of grease http://bbs.homeshopmachinist.net//eek.gif$1500 for the bearing $950 for the machine work,right down the toilet.

[This message has been edited by wierdscience (edited 01-22-2005).]

01-22-2005, 09:44 PM
The local bearing supplier I go to has a stuffed double tapered roller bearing on display..A bit bigger than that one probably bout 18"bore

I was told the cost but can't remember it now..It came from Germany and it takes approx 10mths from time of order to delivery..

Spin Doctor
01-23-2005, 07:45 AM
We had a ball bearing around this size one time that was from a machine being rebuilt. The boys asked if the unit was going to be re-used or if they could cut it open for the balls (2.5"). The boss said sure no problem the replacement is on its way. Five minutes later the boss comes out to stop them just as the guy with the torch finishes cutting the outer race in half. The Proccessed Organic Matter hit the Air Circulation Device that day and everybody got splattered

jack d
01-23-2005, 08:17 AM
Cosmoline and torches....
Scary scientists out there.
One fry short of a happy meal.
Hey Paul, for crissakes, what bearing? One sneeze and its all over brother.
From what Ive been told, the "helper" down there was told to burn the grease and crap off the shaft this bearing goes on.
Only problem was it had been previously sprayed... coating popped off... looks like they have to go to Chicago to get another shaft....Hoo baby.

Michael Az
01-23-2005, 08:39 AM
I just sold a new bearing just like that on ebay, a little smaller at 300 lbs. I think the retail price is around $10,000. It went for $300, talk about pennys on the dollar.