Need Help From A Bearing Guru

[elimjohnson]

First, I know nothing about bearings...after being lost in a sea of configurations I need a bit of help.

I am refurbishing a standard 16 1/2" Delta drill press and putting a VFD/3ph motor setup on it. While I have it all apart I want to replace the stock bearings which are still in decent condition but not the best I am sure. They are:

(3) NTN 6205Z
(1) NTN 6203Z

I am looking for the QUIETEST bearings that are appropriate for something like this. As long as all four bearings total no more than $100 or so I am fine with that. The OEM ones would be that much and I know they are not as good as aftermarket ones...just need to know which direction to go.

It was suggested to me today to use hybrid bearings? Even if this is a good way to go, still need an appropriate configuration. Looks like these are super expensive though.

Oh, probably want to stick with Japanese bearings or something of pretty high quality if possible.

 

[reddevildemo]

I would go with SKF brand. Good quality for the money. We use them on most equipment at work.

 

[elimjohnson]

But i am looking to know what model or configuration is best.

 

[EDGAR]

I think those bearings are much cheaper than what you think.

Do you want your bearings with one shield or two? I believe (not entirely sure) that if the part number has only one "Z", it only has one shield. The bearing part number with two "Z" has two shields. I think this would be better, as the grease would remain inside the bearing this way. The one shield would be more appropriate for immersion in oil.

http://cnc-specialty-store.com/bearings/ball-bearings/6205-6205z-6205zz-ball-bearings-25x52x15.

http://cnc-specialty-store.com/sear...search_in_description=1&keyword=6203z&x=0&y=0

http://www.amazon.com/dp/B009SEHGHY/?tag=atomicindus08-20

Also look below for bearing interchange.

http://www.srg-bearings.com/NTN/NTN6205Z/

 

[elimjohnson]

I would think that double shielding would be best but I also need to find a configuration that is as QUIET as possible.

And when i spoke of them being expensive, I was talking about hybrid bearings. From what I can see you did not post any hybrid bearings which are metal casings with ceramic balls inside as far as i know. Everything i have seen of these are extremely expensive.

 

[EDGAR]

"First, I know nothing about bearings...after being lost in a sea of configurations I need a bit of help."

But does most of the noise comes from the bearings or the other moving parts? Bearings are intrinsically low noise unless these are damaged, so what is the use of low noise bearings if the low noise is drown out by the high noise of everything else? Unlikely that ceramic bearings is going to make the drill press less noisier.

The only real advantages of ceramic bearings is longer life, electrical insulation and running at higher speeds.

One site mentions "Excellent performance in electrical and magnetism sensitive applications. Wear and corrosion resistance. Lubrication and maintenance free." No mention of lower noise anywhere, so you are just assuming that more expensive means less noise. These ceramic bearings are for much heavier duty applications than a drill press.

If I did not post ceramic bearings is because these are totally unnecessary for your application.

http://www.ortechceramics.com/hybrid_bearings.htm

http://www.bearingshop.com.au/store/categories/ceramic+categories/?gclid=CLWmhe_zhsUCFRc2gQodQCUA7A

 

[404]

Regular New bearing will be undetectably quiet. These days a lot of stuff comes with 2 rubber seals, called 2RS so 62032RS for example.

Noise will come from unbalanced pulleys, loose sheet metal, LOOSE PARTS IN GENERAL, the belt entering and leaving the pulley, air noise from the motor fan.

Ceramic ball bearings can be helpful at super high rpm for router spindles.
A drill press does not operate at those speeds.

 

[404]

And unbalanced motors.

 

[mitusa]

I would think that you need sealed bearings...not shielded. And I doubt the bearings are related to the noise problem .

 

[devoncoolman]

Put back in what was in it. Buy those same numbers again and it will all be fine. Not rocket science here. A good bearing will be so quiet all the other moving parts will drown out any noise they have which is non.

 

[nickelTwin]

I would not spend the money on hybrid bearings. You will get very little benefit (maybe alittle longer life). A good quality replacement bearing bought at you local bearing supplier will most likley out live you in a home drill press. The difference in noise is minimal. The noise from either bearing will be drowned out form the noise created from the belt anyway.

Also the speed involved with a drill press is really slow. Ceramic bearing are used many times in high speed applications.

A couple years ago I replaced the bearings on my 45 year old table saw. I used regular bearings but chose double sealed bearings (2rs).

I would put in good quality sealed beaings and save your money.

 

[GirchyGirchy]

Buy some fully sealed Nachi, SKF, etc. bearings of the same numbers and be done with it.

 

[zcbauer89]

All bearings should be quiet, when they're loud usually they're bad. That's been my experience with farm equipment. SKF bearings are good for the money, like a previous poster said. I've had a mix of Mexican made and US made SKF bearings in the past. Timken bearings are good too, if you can find a dealer for them. NTN bearings are good, but they used to be much better.

 

[Rory Bellows]

I needed bearings for my 1940's delta wood metal bandanas. I looked locally and was shocked by prices. I needed 4 that were $28.43, two that were $33.36, and two that were $31.33. Looked everywhere even considered buying nos off eBay. Ended up ordering from Noma bearing. Only got six one was out of stock. The 4 were $8.00 vs $28.43 and two www ere $9.00 vs $33.36. Made in Japan and could specify shielded, open, etc. Check them out if you get some sticker shock somewhere else.

 

[elimjohnson]

Alright, thanks for all the help.

I just got three SKF 6205-2RS and one 6203-2RS bearings.

 

[Major Ramifications]

The local bearing supply house is great for this. I can bring one in and tell them if I would like it to be identical or if I would prefer sealed or whatever and they hand me what I need and I don't hand them much money.

 

[elimjohnson]

I like supporting local business and getting the item the same day, but I called the only two places near me this morning and they were both nearly 3 times the price of what I could get on eBay. I don't mind paying a little more, but not that much more. eBay is also free shipping to my door and no tax...local businesses need to get a clue arleady...its 2015 for crying out loud and ecommerce is not a new thing anymore.

 

[Rory Bellows]

I like supporting local business and getting the item the same day, but I called the only two places near me this morning and they were both nearly 3 times the price of what I could get on eBay. I don't mind paying a little more, but not that much more. eBay is also free shipping to my door and no tax...local businesses need to get a clue arleady...its 2015 for crying out loud and ecommerce is not a new thing anymore.

X10,000. My local bearing place is well regarded and recommended by everyone. Problem was they wanted Over $235.00 for bearings I bought from an actual bearing maker for $71.00. My local place probably sells the brand bearing I bought but just ridiculously marked up.

 

[Charles (in GA)]

I like supporting local business and getting the item the same day, but I called the only two places near me this morning and they were both nearly 3 times the price of what I could get on eBay. I don't mind paying a little more, but not that much more. eBay is also free shipping to my door and no tax...local businesses need to get a clue arleady...its 2015 for crying out loud and ecommerce is not a new thing anymore.

The local bearing houses are geared to support business and industry. For most large companies, and even smaller ones, what they pay is the cost of doing business and they need those bearings or other supplies pronto. Cost becomes second to availability. Most of those businesses could care less if you come in and buy four or six bearings every few years from them, it really doesn't help their bottom line.

Charles

 

[EDGAR]

MITUSA
"I would think that you need sealed bearings...not shielded".

The model numbers provided by the OP indicate shielded bearings, not a sealed bearing. If the bearing has a metal cover, it is shielded, if the cover is plastic, rubber or Teflon, it is sealed, contact or no contact. He could use whatever he wants but what he had was shielded bearings.

 

[redmondjp]

The primary source of noise on my two drill presses is the sheet-metal belt guard vibrating to the 60HZ hum of the motor. Nothing to do with the bearings at all.

 

[elimjohnson]

Please close this thread...thanks!

 

[defektes]

Your noise is not your bearings if they are fine. Throw some new Timken (Preferably,) or SKF and be done with it. Buy the same part numbers.

 

[elimjohnson]

Seriously, please read earlier posts!!!!!!! SKF bearings were already purchased and as a matter of fact have already shipped. This matter is closed!

I dont see how i can close this thread unfortunately. if someone knows a way please let me know.

 

[bubinga]

Seriously, please read earlier posts!!!!!!! SKF bearings were already purchased and as a matter of fact have already shipped. This matter is closed!

I dont see how i can close this thread unfortunately. if someone knows a way please let me know.

don't worry about it, the thread will die out.
The information given after you said you got the bearings from e bay I think it was, is good information.
Normally, threads are not closed here, unless there are folks getting nasty with each other.

 

[defektes]

Seriously, please read earlier posts!!!!!!! SKF bearings were already purchased and as a matter of fact have already shipped. This matter is closed!

I dont see how i can close this thread unfortunately. if someone knows a way please let me know.

Chill out man, not gonna hurt if you get a few extra posts, almost like you got anxiety over it

 

[elimjohnson]

Uhh...no anxiety...just common sense to read through a thread. Also people are subscribed to threads and receive notifications for no good reason other than someone wants to put in their two cents far too late. If there really was more good information rolling in then great, but this thread really was dead a while ago.

Sad to have to when supposedly dealing with adults, but...unsubscribed.

 

[Modern Jess]

just common sense to read through a thread.

You must be new here

 

[zcbauer89]

We're just trying to help. Try getting this much information for free anywhere else.

 

[mrborohachi]

Have you tried BOCA bearings in Florida? I have purchased hybrid bearings for my fishing reels from them

 

[bubinga]

Uhh...no anxiety...just common sense to read through a thread. Also people are subscribed to threads and receive notifications for no good reason other than someone wants to put in their two cents far too late. If there really was more good information rolling in then great, but this thread really was dead a while ago.

Sad to have to when supposedly dealing with adults, but...unsubscribed.

As far as "notifications ", same with face book, I just set them to
"No E Mail Notifications "
That way, you, can just go to "control panel" and see your updates to your subscribed threads.
That way, it's not bugging you in your e mail.
You just come here when you want.
Actually though, my "home page" is set to 2 tabs.
My Yahoo mail, and Garage Journal.

 

[bubinga]

Have you tried BOCA bearings in Florida? I have purchased hybrid bearings for my fishing reels from them

lots of the guys like "Accurate bearing"
Lynn knows her stuff.
She knows most of the interchange in her head,
and they are,
1, reasonable on there bearing prices.
2, Reasonable on there shipping. No handling charges either.
3, quality parts, usually Nachi bearings.