Shop Floor Talk  

Go Back   Shop Floor Talk > Welding and Metalworking Forums > Machining

SFT Search:   
Reply
 
Thread Tools Display Modes
  #11  
Old 12-13-2018, 11:06 PM
Shade Tree Welder's Avatar
Shade Tree Welder Shade Tree Welder is offline
Grumpy Bastard
 
Join Date: Jun 2004
Location: Kankakee County, IL
Posts: 19,419
Default

I would recommend a 10 or 12 inch four jaw chuck for a 14" swing.
__________________
Shade

"Prepare to defend yourselves."
-- Sergeant Major Basil L. Plumley, Ia Drang Valley
Reply With Quote
  #12  
Old 12-14-2018, 12:10 AM
LKeithR's Avatar
LKeithR LKeithR is offline
Hey...wait...is there a prize?
 
Join Date: Aug 2011
Location: Langley, B.C.
Posts: 5,011
Default

Quote:
Originally Posted by Lu47Dan View Post
...Until you run into a repair, either a weld up &turn back to size or a turn and sleeve. Those I want the 4 jaw indie for.
The 4 jaw scroll would be paid for and then some after the first 150 parts...
Don't get me wrong, a 4-jaw scroll would be handy to have; you just need to know what it's uses and limitations are.

I actually have a job right now that I could use one for. It's 2" cold-finish square with a round spigot feature on one end--tolerances are not all that tight. I did one small batch before using a 4-jaw independent and, of course, it works fine but it is very fiddly and time consuming to set something like this up. A 4-jaw scroll chuck would be perfect for this.

I while ago I actually discovered that one of our customers had a 4-jaw scroll chuck kicking around. He brought it down so I could look at it but, for a number or reasons I decided it wasn't right. First and foremost it was a 12" which, while it would fit, would be pretty big for my 13" lathe. I think I figured out that I could hold up to about 4-1/2" square with the conventional jaws and maybe 9-1/4" with the jaws reversed. It was also quite beat up and it had no backing plate so I felt that the 500 bucks he was asking for it was just too much.

I wouldn't have had any qualms about running it though; while my lathe is only a 13x40 it has a D1-6 spindle and weighs about 3200 lbs. It would have handled the chuck no problem.

That Lodge & Shipley sounds like a winner--their bigger lathes are as good as anything out there if they're in good shape. I've always had a bit of a soft spot for that brand and If I were 25 years younger and it was close enough I'd be all over it.

Couple of pics for teasers. First one is listed as a 21" x 60" and the second is a 20.5" x 54". Both appear to be in real nice shape...drool...
Attached Thumbnails
Click image for larger version

Name:	Lodge & Shipley1.jpg
Views:	52
Size:	194.8 KB
ID:	148462   Click image for larger version

Name:	Lodge & Shipley2.jpg
Views:	51
Size:	153.7 KB
ID:	148463  
__________________
Keith

Measure twice and cut once...or...wait, was that the other way around?
Reply With Quote
  #13  
Old 12-14-2018, 01:40 AM
greywynd's Avatar
greywynd greywynd is offline
I can dig it
 
Join Date: Dec 2005
Location: Wainwright, Alberta
Posts: 4,713
Default

I think the Harrison lathes we had in high school had L00 spindle mounts.

Question for the job, are they short enough that they don’t go into the spindle? Or is your spindle bore big enough to fit?

I think I’d be more apt to make it into a mill job. Length with a stop, then depending on lenght an angle plate or make a fixture that hangs the part down over the front edge of the table.


Sent from my iPhone using ShopFloorTalk mobile app
Reply With Quote
  #14  
Old 12-14-2018, 04:30 AM
Lu47Dan's Avatar
Lu47Dan Lu47Dan is offline
Connoisseur of Old Iron
 
Join Date: Mar 2006
Location: N/W Pa.
Posts: 5,971
Default

Ron thanks for your input, I will have to see if there is a 12" in the listing.
Keith, I liked the L&S, the one shop I worked in had. It was huge but short, like maybe 40" between centers. It would take one hell of a cut. The millwrights used it all the time.
Mark, will go into more detail about the job later today or tomorrow.
Dan
__________________
Tools to Men are like Shoes to Women , you can never have too many !!
Used diesel engines are an adventure anyway you look at them !!
Miller XMT-304 Multiprocess
Miller 10-E Wire Feeder
Miller Spectrum 2050 Plasma Cutter
Hobart AC/DC stick welder
Hobart 175 Mig
Craftsman O/A set
Turbo torch and B-tank
Reply With Quote
  #15  
Old 12-14-2018, 07:24 AM
Ironman's Avatar
Ironman Ironman is offline
Iron Modification Investigator
 
Join Date: Feb 2008
Location: Warburg, Alberta, Canada
Posts: 13,632
Default

Quote:
Originally Posted by terry lingle View Post
The hidden issue with chuck sizing is interference as you open the jaws. it is machine dependent.
I have that issue with one of my lathes where a 10 inch chuck will open wider than a 12 inch. a larger chuck is not automatically a better fit to a lathe.
Some things to consider are weight, opening clearance, how far out from the spindle bearing you are and clearance over the cross slide.
This is an issue to pay attention to. If you don't, and buy an oversized chuck, you end up with an extra heavy small chuck in reality.
I have a large 3 jaw that I almost always use, but I have a gap bed lathe and the gap gathers dust as I never put it back in. That way I can chuck something bigger than 4 inch without the jaws hitting the bed. It does not matter what size the lathe is, there will always be a chuck that causes interference with the bed if larger then needed.

The other notes about a set true are almost correct. A set true, once set for a specific diameter, is good for a range + or - the size you set. So if you had a shaft and zeroed the chuck and carved .250 off the far end, then flipped it end for end, you will still be on the money.
__________________
Gerry
You got freedom of speech, if you don't say too much.
Aaron Neville

"I must abide by my core values, my ethical responsibilities and constitutional obligations. There can be a cost to acting on one’s principles, but there is a bigger cost to abandoning them.” Jane Philpott
Reply With Quote
  #16  
Old 12-14-2018, 10:53 AM
4gsr 4gsr is offline
Member
 
Join Date: May 2018
Location: Victoria, TX
Posts: 122
Default

If your still interested in a 4-jaw independent chuck, I have both a 8" and 10" Cushman, both with integral L-00 mounts here. The 8" was a NOS one I bought thinking I would use it on my used to own 13" lathe and never did. And the 10" one I bought new back in 1979 and has been used only a hand full of times over the years. If interested PM me. Ken
__________________
Ken
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Web Search:

All times are GMT -5. The time now is 08:12 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.