PSI sharpening system

major_bob · Post by **major_bob** » Mon Dec 12, 2011 2:10 pm

Any opinions on this ?

http://www.pennstateind.com/store/LCMPLUS.html

Specifically would it work on a Mark 5 ?

beeg · Post by **beeg** » Mon Dec 12, 2011 2:21 pm

You'd have to get a 5/8s plain to a 1"x 8tpi thread. Do you have a sanding disk?

major_bob · Post by **major_bob** » Mon Dec 12, 2011 2:48 pm

I use my SS sanding disk and sharpening jig now. It would just seem that the to have on going sharpening sharpening capability while turning would be advantageous.

terrydowning · Post by **terrydowning** » Mon Dec 12, 2011 3:09 pm

From the photo it appears that this particular tool uses the 1x8 TPI thread of the turncrafter lathe and leaves the MT2 opening available for MT2 centers.

Most stand alone lathes have a Morse Taper (MT) in the the head stock, SS does not. So I don't believe there is any merit to this system for SS users.

You may want to call PSI for specifics. If the disc offers and additional 1x8 TPI attachment for attaching chucks, then it may be worth while. Otherwise, not much use for us SS users.

The lack of a MT in the head stock is a huge difference and IMHO a limitation of the SS as a lathe. There are many drive centers that just aren't available to SS users since we don't have a MT in the head stock. Not to mention through drilling towards the head stock is out of the question. I have seen plans for making your own collet and jam chucks but all are based on creating a MT to slide into the head stock to serve as the drive attachment, so not viable for the SS. I have not been able to come up with a viable alternative (other than purchasing items) that can be used on our solid 5/8 spindle.

major_bob · Post by **major_bob** » Mon Dec 12, 2011 3:24 pm

Any other suggestions out there on configuring the SS for simultaneously turning and sharpening ?

Can I mount the disk on the SPT end with the sharpening jig mounted on the extension table ? Realize I would need to account for the opposite turn direction to sharpen on the "downside" of the disk.

SDSSmith · Post by **SDSSmith** » Mon Dec 12, 2011 3:58 pm

major_bob wrote:Any other suggestions out there on configuring the SS for simultaneously turning and sharpening ?

Can I mount the disk on the SPT end with the sharpening jig mounted on the extension table ? Realize I would need to account for the opposite turn direction to sharpen on the "downside" of the disk.

There was a discussion a while back, here is one post with one solution. If you search the messages you should find more info.

fjimp · Post by **fjimp** » Mon Dec 12, 2011 8:47 pm

One area of weakness within my workshop is my sharpening station. I have been using several tools or methods for sharpening. Each is located in a different area of the shop. After the Christmas rush I plan to centralize sharpening to two dedicated area. One for the grinder which is where all lathe chisels are sharpened. The other will be where everything else is sharpened and honed. I have learned it works better for me to have sharpening totally separate from my Mark V. Simply stated I find myself sharpening frequently and prefer to not disrupt whatever process my be occurring when a need to sharpen becomes apparent. Fjimp

JPG · Post by **JPG** » Mon Dec 12, 2011 10:25 pm

Consider:

The hub on a 505-520 sanding disk is almost 2 1/4" long.

The hub bore is all the way through.

The quill shaft is about 1 1/8" long.

Wonder what one could do with a piece of 5/8" shafting about 2 1/4" long.

A 5/16-18 tap would be helpful(and a 'tap drill').

:rolleyes::rolleyes:

SDSSmith · Post by **SDSSmith** » Mon Dec 12, 2011 10:30 pm

[quote="JPG40504"]Consider:

The hub on a 505-520 sanding disk is almost 2 1/4" long.

The hub bore is all the way through.

The quill shaft is about 1 1/8" long.

Wonder what one could do with a piece of 5/8" shafting about 2 1/4" long.]
The hubs on my newer sanding discs are not bored all the way through. There are through holes on my older aluminum discs. But I am still considering.

JPG · Post by **JPG** » Mon Dec 12, 2011 11:44 pm

SDSSmith wrote:The hubs on my newer sanding discs are not bored all the way through. There are through holes on my older aluminum discs. But I am still considering.

Took a second look at my steel flat sanding disks. The two longer hub have a through hole. The shorter(500) one seems to not have a hole through the disk(I did not remove the paper to check that). All the aluminum ones have a through bore, but like the 500, the hub is too short to do this.

It is the longer hub that makes adding a shaft extension viable.