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pkroeze
12th Apr 2018, 02:32 PM
Hi,

In the pictures below I have a standard drive centre and I want to mount it in my scroll chuck. I have the following questions, will it hold a spindle or will it slip? And how would I true it up as the tapered profile allows it to lean a little?
I don't think this is possible/a good idea but I thought I would ask the question before I parted with cash and bought a drive centre insert.

433502
433503

Pat
12th Apr 2018, 02:38 PM
Close the jaws on the slight depression where your thumb is in the first pic.

You do not want to close the jaws on the morse taper, as it may cause damage and limit it usability in the future.

pkroeze
12th Apr 2018, 03:25 PM
Oh dear.

That makes sense, thanks.

Optimark
12th Apr 2018, 07:01 PM
I may be wrong, but what you have is designed to be inserted into the Morse taper of your spindle without using a chuck. There are other units that are designed to be inserted into a scroll chuck that look nearly identical, except they are quite stubby.

If your lathe has a Morse taper on the inner of the spindle, then you can simply insert it there firmly and you will have a perfect drive. I have a few of what you have in your hand and this is exactly what I do with them.

I would also suggest you undo the screw and use something like blue Loctite to hold it in place in the exact position where everything works. Meaning the spring loaded point which goes in and out has just enough pressure to allow it to move, but doesn't fall out; which can happen.

Mick.

dr4g0nfly
13th Apr 2018, 08:14 AM
No idea if you can get these in Aus, but I use a 2MT Carrier in my chuck if it's only a quick something. Like this one here - https://www.axminster.co.uk/axminster-morse-taper-carriers-ax21686

But truthfully, if you want accuracy, take the chuck off and put the drive centre into the headstock.

pkroeze
14th Apr 2018, 08:40 PM
There are other units that are designed to be inserted into a scroll chuck that look nearly identical, except they are quite stubby.
I was considering getting one of those, McJings has one.


but I use a 2MT Carrier in my chuck if it's only a quick something.
That might work, thanks.


take the chuck off and put the drive centre into the headstock.
Yeah sadly my headstock is just a 1" thread without a recess.

arose62
15th Apr 2018, 08:31 AM
How about a piece of wood held in the chuck, and turn a Morse taper socket in it?
I've gone the other way, and turned male Morse tapers on bits of wood, so that's what I'd try - use the wood lathe to turn a wooden adapter :)

Nubsnstubs
16th Apr 2018, 12:41 AM
No idea if you can get these in Aus, but I use a 2MT Carrier in my chuck if it's only a quick something. Like this one here - https://www.axminster.co.uk/axminster-morse-taper-carriers-ax21686

But truthfully, if you want accuracy, take the chuck off and put the drive centre into the headstock.

You could use a Chuck Plate shown on this website. Wood Turning Tools | Tucson | WoodTurnersWorkHolding Solutions (http://www.woodturnerstools.com). It mounts into the chuck, and you have a whole lot more security with it than you do with a spur center. use it for roughing and forming a tenon, and when done, use it to aid in removing the tenon........ I made the first one in 2010 from plywood, and then went to aluminum because there is a definite advantage to using adjustable screws. It's limited to using it on a 50mm set of jaws. .............. Jerry (in Tucson)USA

EDIT: I don't know why my link shows the way it does, but it does take you to my stuff. .......... Jerry

Mobyturns
16th Apr 2018, 08:35 AM
This is what you should be using https://www.cwsonline.com.au/shop/item/robert-sorby-chuck-steb-centre/-drive-and-live-centres-and-drill-chucks or a similar unit from another manufacturer.

pkroeze
16th Apr 2018, 12:06 PM
Thanks all for you pointers. I will be purchasing a chuck steb centre... probably not the Robert Sorby one though as it's a little out of my price range, McJings has one for $35.

Pat
16th Apr 2018, 12:40 PM
Having started with McJing's versions, then trying and buying the RS versions, I'd just save up to you can afford it.

Skew ChiDAMN!!
16th Apr 2018, 12:44 PM
Didn't you get a woodworm screw (https://www.teknatool.com/product/nova-safe-lock-woodworm-screw-chuck-accessory/) to go with the chuck/jaws? Looks a bit like a bolt with a round head instead of a hex. (May have a pair of flats on the sides, but still mainly round.)

If so, you'll find that the round part fits very nicely in the centre of the chuck, held firmly by the jaws. As it is designed to do... ;) Designed for small bowls but works just as well on spindles.

Just predrill a suitable hole in the end of your blank, thread it onto the woodworm in the chuck and away you go!

pkroeze
16th Apr 2018, 09:08 PM
Didn't you get a woodworm screw (https://www.teknatool.com/product/nova-safe-lock-woodworm-screw-chuck-accessory/) to go with the chuck/jaws?

Yeah I did and I tried this earlier but apparently I can't drill a straight hole... I also didn't have the right size bit to do it with.