What's un-productive is anything that doesn't get JCD's spindle working. Apparently JCD was sold in all innocence the wrong bearings. They are unsuited for a Bridgeport spindle and there is no way the situation can be respolve by parsing messages.
There are two issues here, (1) a successful resloution leading to a matched pair of angular contact DU ABEC Grade 7 beaings in JCD's spindle at (2) no additional cost to JCD.
A few words about my qualifications. I've rebuilt machine tool spindles and conducted the preliminary housing and spindle inspections, conducted correction machining chrome plate and grind etc, inspected and installed the bearings (some of them go for tens of thousands of dollars a set) and assembled the spindle and bearings into their housings, set preload where they were adjustable.
I've spent hours in the spindle shops of Giddings and Lewis and C. O. Hoffacker, I've taken the precision bearing classroom courses taught by Fafnir, Toyo, and MRC, I consulted with the gyro shops of several defence suppliers, I researched, wrote, and taught the bearing class for Puget Sound Naval Shipyard. I've run bearings under Anderometer analysis and worked with the noise engineers and the Dabob Bay Accoustic Range trying to make quiet submarine machinery even quieter. I've even built 24 channel line amps having a -127 DB noise signature used to conduct accoustic range noise surveys. I've dismantled matched sets of bearings, determined that their ball paths were skewed, and reground them to correct the error back to factory specs.
Even then I'n not an expert but I do have experience in depth and breadth in the application and installation of angular contact bearings. This is not an idle parade of curruculum vitae intended to intimidate other into concession but an appeal to others having knowledge and experience to make only concrete contributions to the solution. I ask you at this point not to not weigh in with mere opinion or try to save face by technical posturing.
Regardless of how this thread started I submit the next thing to do here is wait for JCD to report back with his latest observations and an account of his dealings with his bearing supplier. He's in a real fix and we need to support him.
[This message has been edited by Forrest Addy (edited 02-04-2006).]
There are two issues here, (1) a successful resloution leading to a matched pair of angular contact DU ABEC Grade 7 beaings in JCD's spindle at (2) no additional cost to JCD.
A few words about my qualifications. I've rebuilt machine tool spindles and conducted the preliminary housing and spindle inspections, conducted correction machining chrome plate and grind etc, inspected and installed the bearings (some of them go for tens of thousands of dollars a set) and assembled the spindle and bearings into their housings, set preload where they were adjustable.
I've spent hours in the spindle shops of Giddings and Lewis and C. O. Hoffacker, I've taken the precision bearing classroom courses taught by Fafnir, Toyo, and MRC, I consulted with the gyro shops of several defence suppliers, I researched, wrote, and taught the bearing class for Puget Sound Naval Shipyard. I've run bearings under Anderometer analysis and worked with the noise engineers and the Dabob Bay Accoustic Range trying to make quiet submarine machinery even quieter. I've even built 24 channel line amps having a -127 DB noise signature used to conduct accoustic range noise surveys. I've dismantled matched sets of bearings, determined that their ball paths were skewed, and reground them to correct the error back to factory specs.
Even then I'n not an expert but I do have experience in depth and breadth in the application and installation of angular contact bearings. This is not an idle parade of curruculum vitae intended to intimidate other into concession but an appeal to others having knowledge and experience to make only concrete contributions to the solution. I ask you at this point not to not weigh in with mere opinion or try to save face by technical posturing.
Regardless of how this thread started I submit the next thing to do here is wait for JCD to report back with his latest observations and an account of his dealings with his bearing supplier. He's in a real fix and we need to support him.
[This message has been edited by Forrest Addy (edited 02-04-2006).]
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