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Bearing quality

3

37 chief

Well-known Member
Does anyone know where NSK bearings are manufactured, and the quality. I found a couple I can use on ebay I can use. I just don't want ones from china. Stan
 
(quoted from post at 07:49:53 11/02/10) Does anyone know where NSK bearings are manufactured, and the quality. I found a couple I can use on ebay I can use. I just don't want ones from china. Stan
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Some of them are made in Clarinda, Iowa. I used to work there, and at that time, there was a very strict quality control policy in place. Only the best made it out the door. Sad to say, but it isn't that way anymore.

NSK is a Japanese owned company, but most of their bearings are now made in China. When I started work there in 1980, we made 608, 6203, 6204, 6205, and 6206 bearings. When I got out a few years ago, the product line had grown immensely.
 
Rusty,

Can you tell me when one should use an "angular contact" bearing? And why are they limited to 40 degrees when miter gears are 45 degrees by definition.

I am building a gearbox with miter gears and new Fafnir 7208 single row bearings. The brass retainer ring is all floppy and not stable. Should I be using a double row angular contact bearing? The bearings are directly behind the gears. There is an input gear, idler gear, and output gear. The input shaft goes straight through after being pressed on the input gear. The output shaft is hollow and has reverse rotation from the inside annular shaft which is the input. Hope I am not confusing you.
 
Have used NSK bearings for a variety of things over the years with no problems so I"d say, at least for me, they have always seemed to have been of good quality. As to place of mfg., I don"t have a clue....
 
(quoted from post at 01:37:36 11/03/10) Rusty,

Can you tell me when one should use an "angular contact" bearing? And why are they limited to 40 degrees when miter gears are 45 degrees by definition.

I am building a gearbox with miter gears and new Fafnir 7208 single row bearings. The brass retainer ring is all floppy and not stable. Should I be using a double row angular contact bearing? The bearings are directly behind the gears. There is an input gear, idler gear, and output gear. The input shaft goes straight through after being pressed on the input gear. The output shaft is hollow and has reverse rotation from the inside annular shaft which is the input. Hope I am not confusing you.
Click to expand...

Dunno the answer,,, any how its a way to make a bearing cheaper when the load is only applied to one side of the BRG... I have only ran into it one time on a Honda trans,,, by mistake installed it backerds,,, cost me a $100 and a hard days work to wiggle my self out of it... I felt like I got out cheap.... Mite B wrong but that's the way I looked at it
 
Wayne,

Actually the angular contact bearings are considerably more expensive than the radial or deep grove radial bearing. I can't find any specs on the recommended angle loading of the deep groove.

The double row angular contact bearing can be installed either side. Plus they are a tight bearing not like the single row angular contact.
 
(quoted from post at 19:22:22 11/02/10) Those numbers look like alternator and small pump bearings.
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The 6203 is used in alternators and generators plus several other applications. Most of those bearings were sold to companies that built electric motors, washing machines, home appliances, garage doors, etc., and the not quite perfect 608 bearings were sold to skate board makers.
 
Single row tapered roller bearings are better as they have line contact, and are capable of taking heavier loads. Preloaded as described in the installation guide, they are the bearing of choice for your gear box. Angular contact ball bearings are OK for the application, The load from shaft to bearing will be compound between axial and radial. with good shimming or adjusters, at just little more than no preload, they will be OK. late 40 and early 50s Chevrolet and GMC 3/4 ton PU had them for front wheel bearings.

A dual row angular contact bearing (cartridge bearing) will have 1/2 of its balls facing the wrong direction. Jim
 
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