New saw arbor question

[reible]

Hi,

I have an extensive collection of papers from shopsmith purchases over the years. One of these deals with an arbor I purchased at a shopsmith store I believe somewhere after 1989 (paper work is dated 1989). It lists several arbors
505511
http://www.shopsmith.com/ownersite/item ... =Find+Item
555130
http://www.shopsmith.com/ownersite/item ... =Find+Item
555321
http://www.shopsmith.com/ownersite/item ... =Find+Item
555608
http://www.shopsmith.com/ownersite/item ... =Find+Item
555572
http://www.shopsmith.com/ownersite/item ... =Find+Item

across from the 555321 is a note to the following effect:
If the lower saw guard on your MARK V is plastic you MUST use the rubber spacer (501307) that came with the Saw Arbor. Install the spacer on the quill as shown. (This mounted a 5/8" blade)

If the lower saw guard on your MARK V is metal, you MUST attach an aluminum spacer (555070) and installation instructions are available free of charge from Shopsmith.

The original arbor was a 505511 for the 1-1/4" blade but lacks the note...

Looking at the old metal guard it has restrictions on what should be mounted, it includes magna 9" and 10" blades mounted on 1-1/4 arbors, dual sided sanding disks and the dado. No mention of 5/8" saw arbor.

The metal guard came with my 1976 model, I had a collection of steel shopsmith blades for it and when the new plastic shields came out I upgraded. So far as I can remember the machine came with the rubber spacer (501307) and when I got my first arbor with the extra washer I stuck it in a box. It would appear that I must have purchased the 5/8" arbor after I upgraded to the new guard system or perhaps I wasn't using the guard back then... I know I did not make or purchase the 555070 part but I knew about it.

So at some point in time the shopsmith must not have come with the 501307 washer??? It must also be true that the 555321 arbor must have positioned the blade at a different spot then the orginal one(s) did if there was indeed an earlier 5/8" adapter.

So can anyone shed some light on this subject? For me it is just interesing as I have long since left this stuff in the sawdust of time, but we have current users who this might apply to.

Ed

[JPG]

Just to muddy things up further I have in front of me an accessories cataloge from 1963!

I quote as follows:
12431 5/8" Saw Arbor
22031 5/8" Universal arbor

In addition to these are 1/2" Universal, 1 1/4" saw arbor (m5), 1 1/4" saw arbor (sawsmith)

This document also has a 1/2" shaper arbor.

So there WAS an 'older 5/8" saw arbor. From the pix shown, the saw blade would stick out from the quill much farther than the 1 1/4". There was then NO attempt to make it so as to 'automatically line up with the slot in table'.

[allsas]

This arbor was with a goldie. I assumed that it was used with a dado blade. When the adjustable dado is placed on the arbor, the burr goes on about halfway. The two washers were with the adjustable dado. I'm thinking that this is a 5/8" arbor for saw blades. .?. and should not be used with the adjustable dado? [ATTACH]3017[/ATTACH]

[reible]

Thanks for the post guys... so the deeper we go the deeper it gets. Can't wait to find out what else is out there.

Ed

[JPG]

This arbor was with a goldie. I assumed that it was used with a dado blade. When the adjustable dado is placed on the arbor, the burr goes on about halfway. The two washers were with the adjustable dado. I'm thinking that this is a 5/8" arbor for saw blades. .?. and should not be used with the adjustable dado? [ATTACH]3017[/ATTACH]

Looks like a "12431" but is missing a washer that came with it. In 1963 it was called a 5/8" SAW arbor. It does NOT have a keyed washer/slot. Wasn't meant to be used with stack dado.

[reible]

The only other arbor I know of is the 555302
http://www.shopsmith.com/ownersite/item ... =Find+Item

I don't own one of these but I'm guessing it is somewhat different then the ones for mounting blades...

Ed

[JPG]

The only other arbor I know of is the 555302
http://www.shopsmith.com/ownersite/item ... =Find+Item

I don't own one of these but I'm guessing it is somewhat different then the ones for mounting blades...

Ed

You will note the presence of a keyway on the bolt shaft. This(with the keyed washer included) is to ensure safe(not loosening of nut) use regardless of which shaft it is attached to(quill spindle or opposite end of headstock).

It COULD be used for a saw arbor, but the extra length of the threaded part can cause interference problems below the table(tie bar/guards/etc.).

[reible]

Hi,

This item is designed to work with the:
http://www.shopsmith.com/ownersite/cata ... lguard.htm

That only mounts on the "saw" side. I also expect the exposed threads to be less, how much less I'm not sure. And while most of you still doubt the "other" reason I do not. It is also interesting to note shopsmith grinding wheels are only I believe 5" in dia. not sure of the width either... interesting choice of size.

Ed

You will note the presence of a keyway on the bolt shaft. This(with the keyed washer included) is to ensure safe(not loosening of nut) use regardless of which shaft it is attached to(quill spindle or opposite end of headstock).

It COULD be used for a saw arbor, but the extra length of the threaded part can cause interference problems below the table(tie bar/guards/etc.).

[JPG]

Hi,

This item is designed to work with the:
http://www.shopsmith.com/ownersite/cata ... lguard.htm

That only mounts on the "saw" side. I also expect the exposed threads to be less, how much less I'm not sure. And while most of you still doubt the "other" reason I do not. It is also interesting to note shopsmith grinding wheels are only I believe 5" in dia. not sure of the width either... interesting choice of size.

Ed

'Designed' or 'intended'? It can be used without grinder guard etc.

[reible]

I'd say both. In the old smaller yellow PTWFE they had plans for and I built a guard that looks much like this one. If you have that copy take a look at page 304, page 150 has the plans.

When shopsmith introduced the production one I was interested and noted the new arbor... In fact I was going to buy it but got a deal on a professional rockwell grinder for less then the cost of shopsmith items. Since the two came out together I'd like to say the intent was for it to be used with the grinding wheel and housing and since they came out together I'd say it was designed to fit in the housing... not to short and not to long as to hit anything. It is sold only as a what it is and not for anything else.

If one doesn't mind grit and dust flying around I guess you could do with out a guard... but ever since I saw a grinding wheel brake apart while spinning up and fly 20 feet or so and cracking a cement block... well I never stand in front of a wheel spinning up, I don't grind on the side unless the wheel says it's Ok and I always have a guard in place.

I also have a sheet metal shield that I put over the tubes for all abrasive operations... the plans for that are in the book too.

Ed


[quote="jpg40504"]'Designed' or 'intended'? It can be used without grinder guard etc.]