Do I need an insert for this chuck?

[sachbvn]

First link - do I need an insert for it? Does it come with one? It doesn't really say.

www.woodcraft.com/Catalog/ProductPage.aspx?prodid=28578&ss=2a47a0c8-ecd5-474d-8d5f-7bf23982efac



Second link - what insert do I need - my lathe spindle is 1" x 8tpi - would that be the info needed for the insert?

www.woodcraft.com/Catalog/ProductPage.aspx?prodid=29195&ss=1877ef8d-22cb-49c6-a7e6-9c7734aac405



Do I need an insert for each chuck I have? I assume so - and while I could take the insert from one chuck and put it into the other - is it much more convenient to just have to separate inserts??



Thanks!
Zac

[sdb777]

I have the first chuck. Use it to hold my blanks while drilling.

I don't have an insert.....





Scott (it'll clamp hard too) B

[Mark]

Zac,

You'll need an insert for the G3, but the other is already threaded for your 1 X 8 tpi spindle. Put the insert in, lock it down with the set-screw and some cork, and forget it. I found that I needed to put something compressible in the hole the setscrew went in, to make sure it didn't loosen up. If you tighten down on the threads alone, there's not enough surface area, and you'll damage the threads on the insert to the point it'll be hard to remove. Put a small piece of cork in the hole, then crank the setscrew down, and it'll stay in place.

The insert really is only to make the chuck useable amongst multiple makes and models of lathes on the market. It's also handy, so that when you trade up to a larger lathe, you only have to buy a new insert to use the chuck on your new machine.

Mark

[TDHofstetter]

The first (Nova Precision Midi) chuck is already threaded to fit your spindle - no insert necessary.

The second (Nova G3) will need an insert; for that they just need to know that your spindle is 1"-8.

Like jaws, inserts are usually pretty proprietary to the chuck... and nearly always proprietary to the manufacturer; they can't be moved from one manufacturer's chuck to the next, and may be specific to the model of chuck. It's best to always leave the insert in place once it's installed, unless you buy a couple of different inserts for one chuck so you can attach it to another fella's lathe when you visit.

EDIT: WOW! That's a first! TWO responses while I was typing mine!

[sachbvn]

Alright guys - thanks!!

Now, I've seen inserts for right hand threads - left hand threads, and R/L threads. WTH? Which would I need?


Zac (thanks for the tip on the using cork in the hole)

[Beamer]

Saved me from havin' to answer

These guys have ya covered

[Beamer]

If it don't say, it's right-hand. It'll nearly always say if it's leftie

[admin]

If it's not a right-hand thread, it'll be fun using it; turn on the lathe, address the tool to the workpiece. Catch chuck and workpiece before it hits you in the head. Turn lathe off. Address chuck to lathe. Repeat.

That is, unless your lathe runs backwards.

[Beamer]

Inverted Turning!!!

[sachbvn]

Ok - so why the R/L threads and what the heck is THAT?

I'll get the Righty threads KP - doesn't sound like much fun catching a 4 or 5 pound piece of spinning metal!

Zac

[maxwellsmart007]

You might want to think about the Supernova2...you'll outgrow your lathe before you out grow the supernova...

www.kmstools.com/teknatool-super-nova-2-standard-chuck-410

[TDHofstetter]

The left-hand threads are for lathes with a left-hand-threaded second spindle sticking out the back of the headstock, for turning outboard without rotating the headstock. Suffice it to say... if your lathe's only got one threaded spindle, it's right-hand thread.

[Mark]

Ok - so why the R/L threads and what the heck is THAT?

Zac,

The Right and Left designation, strange as it seems, does mean that the chuck or insert can be used on either the inboard end or the outboard end of the spindle (Ref Tim's note). The insert I got when I bought my G3 is R/L, and I didn't think much of it. That is, till I got it just a tad crooked while threading it on once, and it actually tried to start onto the spindle, before jamming. The R/L inserts are intentionally cross-threaded, I s'pose so you can move from inboard to outboard spindle position, without messin' with it.

For your lathe, either the R or R/L will work.

Mark