Shopsmith Forums

Got my new Nova PN 'ISNS' (i.e. Type S) insert/adapter for my Nova G3 chuck to replace the Nova PN 'IFNS' (i.e. Type F) which was the original one supplied.

I took a few pictures to show the differences. The first picture
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shows the two adapters side-by side - the Type F on the left and the Type S on the right. You can readily see that the hex shoulder on the Type S is much thicker than the one of the Type F (in fact, I measured 0.369" on the F and 0.754" on the S). You can also see (sort of), by the 'leaning' of the hex wrench, that the set screw is at a slight angle. The set screw is also larger and now matches the rest of the screws on the SS (hurrah!).

The 2nd picture
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shows the Type F on the Mark V's output shaft. Notice that the adapter does not fully seat at the end of the shaft. The next picture
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shows the Type S - it does fully seat. The last picture
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shows the new adapter and the G3 all mounted and ready to go. Overall a nice improvement and applause to the folks at SS who obviously saw a problem and addressed it.

Bob, great pictures! There is an old post that got really long which had many photos and document from Teknatool/Nova explaining the reason for the ISNS adapter.

T

If details are what you want, there are more to be had.

The G3 has been the subject of discussion in several previous threads and I won't be surprised if if comes up again in the future. There are still web pages being used in online links that do not acknowledge the ISNS adapter.

https://www.teknatool.com/products/chuc ... pp_web.pdf

Dusty refers to the G3 "megathread". 10 pages long from many forum members. I have reread it a number of times & have referenced it to many people who purchased G3 Kits from people other than Shopsmith or Teknatool/Nova.

I just reread a post (below) where Algale was advised by Teknatool not to use the G3 without the new ISNS insert. In the megathread, there is a document from Teknatool advising the person receiving a complimentary new ISNS adapter that the ISNS addresses safety issues.

I think that is a part I missed as I don't recall anyone experiencing any safety issue or what the safety issue might be, i.e. a G3 chuck flying off or something like that. But then it could be with a certain RPM, perhaps running the headstock in reverse in high speed like can be achieved with a PowerPro I honestly don't know.

Other companies like Woodcraft are selling the G3 kits. Woodcraft offers a plain 5/8" adapter, but their adapter pic has an F stamped on it, but I can't tell what adapter a person will get: An ISNS adapter or the IFNS adapter: the adapter Teknatool has advised customers not to use. Oh the humanity of it all…as I understand some F stamped adapters are correct, while others are not.

But wait: Amazon has a new item for $19.9 with free shipping: an "Nova insert new style" to fit Shopsmith 5/8" plain bore. I know the selling is aware of the proper Shopsmith adapter- I"m not sure I'd call it a 'plain bore'.

http://www.amazon.com/Nova-Insert-STYLE ... B009OLZEXY

The seller: "Woodworker Specialties" is the one who made sure I received the correct adapter last year when Teknatool had an ISNS adapter listed for sale in their latest flyer, but their computer system was still shipping out the IFNS. All that has been corrected to my knowledge. Yet some Shopsmith users are ordering from other retailers and maybe receiving the IFNS. It's confusing, but it's obvious from the pics in this recent thread:
http://shopsmith.net/forums/showthread.htm?t=12015 of the difference.

algale wrote:My adapter is the same as Dusty's. I bought it May 2011. I called Teknatool and they are shipping me a replacement adapt too. Here's the kicker: they advised me not to use the chuck again until I get the new insert. I suspect the angle of the set screw is the issue.

Backhertz, thanks for the tip on the Nova adapter. Just ordered one, but the free shipping is based on a minimum purchase of $25.00, so I found a flashlight on Amazon for $7 that pushed the total over $25.

The Amazon listing does indicate down the page that the Teknatool item is their PN ISNS which is, indeed, the part with the larger shoulder, bigger set screw and the angled setscrew. The older type F (i.e. Teknatool PN IFNS) certainly does work (as many of us can attest) but the type S is more substantial and, IMHO, a worthy update.

If I was buying a Nova chuck for my Shopsmith, I would certainly insist on a ISNS insert.

Regarding Teknatool and Shopsmith replacing type F's - they certainly did and will IF you had purchased a G3 from Shopsmith or directly from Teknatool fairly recently (Teknatool and Shopsmith were a bit fuzzy on the actual cutoff) - the number of 6 or 8 months was told to me by the folks at Teknatool in Florida.

Don't know whether any type F's were ever provided in the 'S' format. Don't care. Physical inspection is the name of the game. Part of the reason why I provided the pictures. And, yes, I was aware of the previous thread and watched it closely while I figured out what to do.

To further beat a dead horse, in the Teknatool link that I posted in post #3 this thread, the "IFNS" adapter is described on page #7 as a 5/8" Plain Bore. I think that might not be what a Shopsmith user wants. Note that on that same page the "ISNS" is also described as a 5/8" Plain Bore Designed for Shopsmith Lathes.

A year or so ago, I got a good deal on a Nova Midi chuck & went to Amazon.com & found a 1"x8 Shopsmith adapter for about $15 plus a couple bucks to ship.
I just checked Amazon today for a friend who needs one & there are several there starting @ about $10 up to $15 plus about $5 for shipping.
It appears to be the same one I have, which, by the way, works just fine & is well made.
Then I started reading this thread & everything seemed so complicated. What am I missing?

Regarding the original photos in this thread, the one with the "F" adapter with the gap between the adapter and the Shopsmith aluminum keeper, the Nova G3 owners manual states that "the chuck body must contact an accurate register on the lathe, either a shoulder on spindle or bearing face etc to ensure chuck will run true. If further modifications are needed (e.g. spacer) these are the responsibility of the user."

Something else that might be of interest in the owners manual is the statement that "user must be professionally trained to use this chuck. Vocational school courses recommended."

Here's a pic of the adapter I mentioned above and, yes, there is a locking screw that is not shown. Like I said, it works just fine.
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