Best Bearings Available

[dusty]

I am starting this thread to avoid highjacking another thread.

The subject of bearings came up in a thread regarding rotation play in the spindle. It seems to be a consensus that really good bearings are required to achieve acceptable run out and spindle play figures. I agree the quality bearings should probably be used. However, no one has declared what "acceptable" is.

OKAY the best bearings available for a 10/10E/10ER or a Mark V Model 510 - What are they? Who makes/sells them?

What does the PowerPro use?

[jsburger]

I am starting this thread to avoid highjacking another thread.

The subject of bearings came up in a thread regarding rotation play in the spindle. It seems to be a consensus that really good bearings are required to achieve acceptable run out and spindle play figures. I agree the quality bearings should probably be used. However, no one has declared what "acceptable" is.

OKAY the best bearings available for a 10/10E/10ER or a Mark V Model 510 - What are they? Who makes/sells them?

What does the PowerPro use?

First, the specification of the bearing is part of the determination of what the final result of what you want to obtain. It is called a stack up. All of the tolerances of the various parts add or subtract to the final result.

For example with the Model 10. Start with the spindle diameter tolerance, then add the bearing tolerance, then add the tolerance of the quill housing spindle bearing outer race seat, now add the tolerance of the outer diameter of the quill housing and finally add the tolerance of the bore in the head stock that the quill rides in. All of these dimensions add or subtract to the final result of the spindle run out. Again it is called stack up. Magna's spindle run out was typically under 0.001" according to the records we have.

OK, back to your real question. We know what the original bearings are in the model 10. They are still available today from the same manufacturer.

Does anyone know what SS uses today or where they source them or what they used in the past? If you don't have a genuine original OEM bearing number that is made by the OEM you will not get the same thing.

IMO, bearings are the most important item in rotating machinery. I will not compromise and buy cheap junk to save a buck.

[Dansmith]

I am starting this thread to avoid highjacking another thread.

The subject of bearings came up in a thread regarding rotation play in the spindle. It seems to be a consensus that really good bearings are required to achieve acceptable run out and spindle play figures. I agree the quality bearings should probably be used. However, no one has declared what "acceptable" is.

OKAY the best bearings available for a 10/10E/10ER or a Mark V Model 510 - What are they? Who makes/sells them?

What does the PowerPro use?

Dusty, thank you for your consideration regarding my thread; but, I would not have minded.

This will be an interesting thread.

[rcplaneguy]

http://www.shopsmith.com/ss_forum/maint ... 14380.html

[Hobbyman2]

Agree,,, original eq or no go.

[dusty]

Agree,,, original eq or no go.

This is difficult to do. Original Equipment ???

Can you tell me which part numbers were used in the original equipment and the associated manufactures? Thus the reason for this thread - an attempt to compile that information.

Example: The Drive Sleeve 25mm x 52mm x 15mm is available from many, many different sources. The Industrial Standard Part Number is 6205ZZ, or 6205-2RS C/3. A Fafnir Part Number for this specification is 205KDD. Another Fafnir Part Number is 205KLL. All three have the same dimensional characteristics (that is they are physically interchangeable) but their prices range from about $8.00 to $45.00.

There are many manufacturers (from all over the world). Some are good and others are not. Price is not always the best determining factor. Manufacturing location is also not always the best determining factor. Specifically - China is not always bad. If you go check, right now, I'll bet that you will find bearings in your Shopsmith that came from China. In the past, parts from Japan were considered taboo. You don't hear that so much any more. The tendency now is to speak ill of Chinese made parts.

Some are good and others not so good. Just keep in mind that the most costly is not necessarily the best.

Side Not:e: The physical dimensions Timken 205KLL is 25mm x 52mm x 15.875mm. Is this a suitable replacement for the Shopsmith Drive Sleeve. Just a confusion factor. A question that only detailed testing or experience can answer.

[rcplaneguy]

For what it is worth, the original bearings in my 510 (bought new from SS) were stamped "Japan". See previous post for image.

[Hobbyman2]

They should all have a part number,,, a supply house will have a cross reference.

[Hobbyman2]

The tendency now is to speak ill of Chinese made parts

----

A few years back China was known world wide for the most accurate tooling of gears and bearings,,,,and used better steel ,, I hadn't heard the opposite

I know for fact that caterpillar was buying better gears from china ,,cheaper then they could make them here stateside .

[dusty]

The tendency now is to speak ill of Chinese made parts

----

A few years back China was known world wide for the most accurate tooling of gears and bearings,,,,and used better steel ,, I hadn't heard the opposite

I know for fact that caterpillar was buying better gears from china ,,cheaper then they could make them here stateside .

Let's not go there. We don't have the information required to determine whose is best and whose is otherwise.

Let us create a list of Industrial Part Numbers for the bearings that most of us as Shopsmith users are likely to need one day.

For starters:

1. The single bearing quill uses a 6202ZZ (Fafnir 202KDD5 C1),

2 The two bearing quill uses a 6003ZZ and a 6002ZC3,

3. The Drive Sleeve with a poly-v uses a 6205ZZ (Fafnir 205KDD or 205KLL2),

4. The Gilmer Drive Sleeve also uses a 6205ZZ.

If you do a little research, you will find that all of these bearings are manufactured by several different companies. Some are US manufacturers but most are from abroad.

When I need bearings, I go to Motion Industries first. Here in Tucson they are most likely to have what I need but if not are willing to order them in. I can specify manufacturer if I want but I usually just tell them what the bearing is to be used for and ask them to get me a good quality bearing for that application. I readily accept what they offer without regard to origin.

Bottom Line: I trust Motion Industries.