Mounting a 5C Collet Chuck on a PM-1022V/PM-1030V

[erikmannie]

I searched for hours to find a backplate when PM was out of stock. I found nothing except the Grizzly backplate ( as mentioned in thread that you referenced earlier) that needs to be modified to work correctly.

I remember reading that. Did you ever buy the Grizzly blank?

Are you going to buy a PM spare backplate now that they have them in stock?

I am excited to get a 5C collet chuck on my PM-1030V. I want to buy a quality Polish chuck, but I will have to save up.

 

[erikmannie]

I have done many hours of searching for DIN 55027 Type C adapters, chucks and studs. I learned that most DIN 55027 items are larger than Type C. There was such a larger selection of items when I was looking for D1-6 items.

 

[erikmannie]

Like I said, I plan to scavenge my “non-Set Tru” 5C collet chuck from my big lathe/D1-6 adapter. I will hopefully fit this scavenged chuck to the adapter that I buy from John (forum member matthewsx). Both the scavenged collet chuck and adapter (from John) were made at the time when TMX was making parts for Bison.

After I get that figured out, I will save up for the Set Tru 5C collet chuck linked below. I will research if this new Set Tru chuck will fit on my Bison D1-6 adapter.

TMX 5" 5C Tru Length Collet Chuck Set Tru Mount 3-862-0505P

TMX 5" 5C Tru Length Collet Chuck Set Tru Mount 3-862-0505P

www.smalltools.com

My question now is: does a Set Tru plain back 5C collet chuck call for a different backplate than a non-Set Tru plain back 5C collet chuck?

I own a Bison D1-6 backplate that is working nicely (sub .0003” TIR) for the non-Set Tru chuck (both pictured below). I hope that a new Set-Tru TMX chuck (linked above) will marry nicely to this backplate.

 

[KevinM]

I remember reading that. Did you ever buy the Grizzly blank?

Are you going to buy a PM spare backplate now that they have them in stock?

I am excited to get a 5C collet chuck on my PM-1030V. I want to buy a quality Polish chuck, but I will have to save up.

I bought two of the Grizzly backplates and studs for a little over $20. The registration hole where the backplate meets the spindle is too large so I machined a bushing to make the backplate fit properly. It works perfectly therefore I won't be buying the PM backplate.

 

[erikmannie]

After much Googling, I’m not seeing any evidence that a Set Tru chuck would require a different adapter plate than a non-Set Tru Chuck.

My adapter is a Bison PN 7-878-056. It is designed to mount a 5” chuck to a D1-6 spindle (this is a D taper).

When I bought the backplate, the description said “finished”. Even so, I fully expected to have to trim down the register a tiny bit to fit the chuck. I put the chuck on; it was a little tight, but tightening the 3 SHCSs seated it nicely. I was surprised that I measured between 0 and .0003” TIR.

In theory, it seems like one would gain better concentricity by cutting the last few tenths of the register on one’s own machine, BUT if you don’t do that you maintain the factory’s concentricity between the register and the mouth of the collet chuck.

 

[erikmannie]

Final word for now: I realize that I should buy a Bison chuck for the Bison adapter plate. Therefore, I will be saving for this completely unaffordable chuck:

Bison 5" 5C Super Precision Collet Chuck Set Tru Mount 7-862-0505

Bison 5" 5C Super Precision Collet Chuck Set Tru Mount 7-862-0505

www.smalltools.com

 

[erikmannie]

Here is a source for economical, import quality studs for a PM-1022V/PM-1030V backplate:

PLUG BOLT 19.5 X 17 X 45 - Grizzly Industrial

Grizzly P0516251 - PLUG BOLT 19.5 X 17 X 45

www.grizzly.com

Here is a very affordable semi-finished backplate:

CHUCK 3-JAW FLANGE - Grizzly Industrial

Grizzly P0516249 - CHUCK 3-JAW FLANGE

www.grizzly.com

I got these links from this video:

Reference (nice pdf):

Parts for Combo Lathe w/ Milling Attachment - Grizzly Industrial

Grizzly Industrial, Inc. is a national retail and internet company providing a wide variety of high-quality woodworking and metalworking machinery, power tools, hand tools and accessories. By selling directly to end users we provide the best quality products at the best price to professionals...

www.grizzly.com

All of this assumes that a Grizzly G0516 uses the DIN 55027/55022 Type C, Size 2 standard between the spindle & chuck, as does a PM-1022V and PM-1030V.

Screenshot from page 18 of this manual:

https://cdn0.grizzly.com/manuals/g0516_m.pdf

 

[erikmannie]

I may be overdoing it on the links here, but here is a very pertinent video. This guy has a “new to me” idea for shimming to minimize runout:

 

[Cadillac]

A set true back plate will have a thick boss in the center. So that you can offset the chuck by the Allen key screws.

 

[erikmannie]

A set true back plate will have a thick boss in the center. So that you can offset the chuck by the Allen key screws.

So it sounds like the non-Set Tru adapter plate that I have now will not serve for a yet-to-be-purchased Set Tru collet chuck, as there is no boss against which the adjustment screws can leverage.

Here is a link to a Set-Tru adapter:

TMX Set Tru D1-6 Adapter Plate 3-875-056P for 5" Chucks

TMX Set Tru D1-6 Adapter Plate 3-875-056P for 5" Chucks

www.smalltools.com

And here are some pictures of it:

I believe this boss can be seen in the first photo. I would have taken that to be solely a registration surface for a plain back chuck.