By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale Jan 24th

What to do,what to do.

All Topics | Latest Posts

Search for:  in Thread Title in  
jimmy b27/06/2019 19:46:20
avatar
570 forum posts
37 photos

I bought one last year (and three sets of soft jaws.....). Its been useful, but to be honest, I could live without it!

But, if you need one, you need one.

Jim

FatWelshBoy27/06/2019 19:55:50
32 forum posts
10 photos

I'd buy something else being as you already have a independent 4 jaw chuck. I've an ER32 collect chuck for my lathe and love it, gets a fair bit of use. I also have a really, really nice independent 4 jaw that's a tad big for my lathe so will be downsizing. Once I've done that I can't see my using my 3 jaw on the lathe again. I've currently got the poor mans DRO of a dial indicator and caliper on the lathe but really tempted to go for a proper DRO after having a play on a lathe with one fitted, really makes things so much easier and quicker. I'd definitely consider a DRO if I was you.

Chris Gunn27/06/2019 20:04:25
292 forum posts
16 photos

I have one and find it handy making clevises and so on, it will grip round of course, but not hexagon. A lot will depend on what you make, if you work with square a lot, then it will save loads of time faffing about with an independent jaw chuck. I often use mine to make rod ends that need to be rectangular in section, I do all the turning and cross drillin and so on, then mill the square to a rectangle.

Chris Gunn

Vic27/06/2019 22:01:08
2399 forum posts
12 photos

I’ve often thought a 4 jaw SC would be very useful.

Michael Gilligan27/06/2019 22:18:00
avatar
14766 forum posts
635 photos
Posted by Chris Gunn on 27/06/2019 20:04:25:

... it will grip round of course, but not hexagon.

.

Read this, and be happy Chris: **LINK**

https://www.hobby-machinist.com/threads/4-jaw-self-centering-chuck-question.35560/

MichaelG.

Chris Gunn27/06/2019 22:32:07
292 forum posts
16 photos

MIchael, I read it, but not 100% convinced by the drawing. I will have a go when I get a minute and report back.

Chris Gunn

John Alexander Stewart28/06/2019 03:47:07
758 forum posts
51 photos

4 jaw sc chucks hold hex stock just fine.

I have one, but the ER25 is used most often, followed by a 3-jaw SC, then 4-jaw SC, finally, way down the list, a 4-jaw independent. I rarely machine from castings, thus the SC and ER chucks are most used.

Here's a pic (posted before) of a 4-jaw SC holding hex:

4jaw-sc-s.jpg

thaiguzzi28/06/2019 05:42:32
avatar
619 forum posts
131 photos

4 jaw SC chuck - i'm with the majority on this one - can't see the point.

pgk pgk28/06/2019 06:52:41
1515 forum posts
285 photos

If you fancy having a play with a SC 4-jaw then, what the heck, buy one. It's really the only way to find out if it was worth it to you. Or... you list all the other related toys around that value that you fancy and see if there's any other suspects.

However you wrap it up, for most of us this hobby is 'playtime' and doubtless if the new toy proves worthless (to you) then some funds can be recovered by reselling it. If you were running a business then the decision would be based on different parameters but even then it's sometimes a gamble that a new item of kit will open up more economic (faster) ways of doing a job or widen the range of jobs.

I'm sure we've all made a gizmo that looked fun or cool and it sits in the cupboard unused and we've all made one that gets used more than we expected.

Howard Lewis28/06/2019 22:33:06
2730 forum posts
2 photos

Maybe I've been depriving myself over the 25 odd years that I've had lathes, but 3 jaw SC and 4 jaw Independent, plus ER collets have done all that I need.

But it maybe that I have yet to come across a job that NEEDS a 4 Jaw SC.

Yes, and i have a Tailstock Turret that is still waiting to be used. "Seemed a good idea at the time" category!

I would be inclined to see if there was anything else that appealed more.

Howard

Neil Wyatt29/06/2019 19:44:53
avatar
Moderator
17070 forum posts
690 photos
76 articles

4-jaw SC is one of those things you don't need, but is rather wonderful to have.

Neil

Chris Gunn01/07/2019 11:58:03
292 forum posts
16 photos

Thanks JAS for showing practically that a hexagon can be held in the 4 jaw self centering chuck, that will save some time in the future. As said before I used it a lot building my 4CD for all the clevises and rod ends from square stock, and am using it quite often right now on the 6" Ruston proctor I am finishing for the same purposes. Once one has such a chuck plenty of items are easier to make from square stock rather than round, but it depends what your interest is.

Chris Gunn

larry phelan 101/07/2019 13:49:03
577 forum posts
11 photos

I bought a 4 jaw scc chuck many moons ago, but to date it is still sitting in its box waiting for a backplate, which I doubt I will ever make. Never really found a job to justify setting it up. I do use my 4 jaw independent chuck quite a lot and can set it true fairly quickly with the clock.

So perhaps you might be better off to spend your money on something else

PS Just be careful who you buy from, see above Post re "Suppliers".

Brian G01/07/2019 15:24:04
650 forum posts
25 photos

Perhaps the mounting makes a difference? My son's Chester has the same collar arrangement as the Sieg SC4, so it takes less time to change chucks than to clock square bar in the 4-jaw, making the self-centring chuck a worthwhile time saver. The mini-lathe is another matter though.

Brian

FullaFlava01/07/2019 17:06:30
30 forum posts
52 photos

Hi,

I can’t answer the OP without knowing what he might want to use or expect a 4 Jaw SC to give him that he doesn’t already have.

Something not yet mentioned in the thread as I can see, is the facility a 4J with soft jaws can give you to have no run out repeatability for small items that you can get exactly square in the Chuck without parallels, say for a second operation where you are machining the backside of a number of parted pieces to bring to thickness.

Obviously you can do this with a 3 Jaw with soft jaws also but it is much more difficult to measure the diameter when boring the soft jaws to size.

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
Ausee.com.au
emcomachinetools
ChesterUK
Allendale Electronics
cowells
Warco
Eccentric July 5 2018
Eccentric Engineering
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest