6203-2NSE Nachi Bearing 17x40x12 Sealed C3 Japan Ball Bearings

Outstanding product, pricing and delivered early. Replaced both bearings in Hayward Superpump II motor, after complete rebuild, only original part left was the motor itself. Performed preventive maintenance cleaning motor inside and out, replaced front and back bearings and capacitor. Bearings are well made and fit as designed. Five year motor is running smoother and quieter in Arizona's sun.Bearings used:6203-2NSE Nachi Bearing 17x40x12 Sealed C3 Japan Ball Bearings6304-2NSE Nachi Bearing 20x52x15 Sealed C3 Japan Ball BearingsCapacitor:TEMCo Motor Run Capacitor RC0010 - 25 mfd 370 V VAC volt 25 uf Round HVAC TEMCo AC Electric

I purchased and installed the bearings on my treadmill (sweat mill as my wife calls it) rear roller. They have been performing very well in less than ideal conditions for almost 3 years. The front roller had bad bearings as well. I made the mistake of replacing the whole assembly purchased from the manufacturer. The bearings in the new assembly failed within a year of use!This time I will rework the front roller and use high quality Nachi bearings to do the job right. They last through the test of dirt, sweat, and time for sure. I will purchase them again for other repairs.

I used this bearing to rebuild my 2004 honda accord 2.4 power steering pump. Fits and works perfect.

Great bearing. Rolls smoothly. No issues at all. Fit perfectly in the idler pulley on my Subaru Outback.

After lots of research and reading Amazon reviews, I took a chance and ordered two of these 6203 bearings. They fit !!!!! I replaced front and rear bearings in a Hayward Tristar 1.5 hp Emerson EE pool motor. The original bearings were made in China and lasted 7 years, these are Japanese and should last longer.You will need a gear puller to get the original bearings off. They are pressed on and would be impossible to remove without a puller. I ordered a 6 inch puller that worked perfect for the rear, the jaws where to big for the front bearing because of the cooling fan (which was to old to try moving away). Fortunately, I had a smaller puller to remove front bearing.I used a 6 inch piece of scrap 3/4" schedule 40 PVC and a hammer to tap the new bearings on. Please be careful to center the PVC so that only the small steel ring of the bearing is being struck, and not the red seal, as that could damage the bearing.The local pool supply told me they do not sell motor bearings and said most people just replace the motor. He said a new motor would be $400 to $500. Online this energy efficient motor is $330.Disassembled, cleaned with compressed air and mineral spirits. Reassembled, very light coating of oil (wipe with cloth) on motor shaft. Motor is now much quieter and smooth. Cost : less than $25 !May God Bless. Hope this helps.

We rely on a huge old compressor for our very large shop. Periodically the thing blows a gasket or breaks down but the money's not always there to replace the entire assembly so we buy what we can for the interim. This bearing was perfect. Compressor's running like a charm (for now anyway) and we're very happy with this thing.

After researching many, I opted for these individually. This size is used in a lot of applications E.G. mowers, compressors etc. Paid a little more but they were made in Japan, the feel was excellent and I did not feel the need to pry out the covers to ensure adequate grease as others needed to do with other bearings. Repaired my 60 gal 5 HP oil free Craftsman compressor which had one bearing fail. Caught it in time before it did major damage. Dimensions are metric, do the math if you need inches. Fit perfect and saved me a ton buying a new compressor. Would certainly buy again.

works perfect, quiet, smooth running. Spec's were right on the dot, used a gear puller to get the old on off and tapped the new one in place- would recommend for any application.

I bought this bearing to replace the one on my 120v air compressor. The bearing on the piston mount was worn and this was a direct fit. At first I was a bit skeptical if this bearing was authentic Japanese but after receiving and inspecting it, it indeed was authentic. I even took it in to a Nachi head office that is not far from me and had them inspect and deem is as authentic. Install was quick and easy. Now my 15 year old compressor is back in business and I can expect at least another few years out of it.

I purchased these to replace the back roller bearings that came with my Horizon Elite Series treadmill. These perform like a dream! They are super quiet and rotate smoothly at any speed I've tried. Highly recommended!

Very good product, work pretty well. Receive two days after ordoring.

Good product.

It's a bearing, it does what it's suppose to do!