• This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn more.
  • NOTICE: There are two new video channel areas set up, one for staff, and one for subscribing members. You need to create a folder. Then add your media to that folder. Once added, you can cut and paste the code at the bottom right to embed the media into a post on the forum.

    It works very similarly to YouTube, except videos are stored on our server. Click Here For The Video Channels

[4]

Soft Jaws for MiniLathe Chuck

[3]
[10] Like what you see?
Click here to donate to this forum and upgrade your account!

Dave T

Iron
Registered Member
Joined
Oct 8, 2015
Messages
10
Likes
9
#1
I have the MicroLux lathe with its standard 3 inch 3 jaw chuck. Chuck has both inside and outside hard jaws, looks to be the same as the Little Machine Shop #1187. I need to hold a thin brass disk, 1/8 thick. Does anyone know where to buy (or how to make) soft, machineable jaws for such a chuck?
 

darkzero

Global Moderator
Staff member
H-M Supporter-Premium Member
Joined
Nov 27, 2012
Messages
2,992
Likes
1,723
#2
Your chuck has 1 pc jaws, hence a set for each ID & OD. Generally soft jaws are made for 2 pc reversible jaws (tongue & groove).

You could make a set of soft jaws from scratch but that requires making the teeth for the scroll as well. For the amount of work required it's not worth it or practical as it will wear out fast if you make 1 pc soft jaws.

I'm not sure what ops you need to do but in your case making an aluminum (or any material you have on hand) face plate might suffice (either to mount in the chuck or directly on the spindle). You can then use use epoxy, CA (super glue), or double sided tape to attach the disc to the face plate. Using heat will allow you to detach the part from the face plate easily.

I've alwaysed used epoxy rather than CA though. Takes longer to set but the epoxy is easier to clean up with heat. CA is quick to set but I hate the smell of CA when heated.
 

David S

Active User
H-M Supporter-Premium Member
Joined
Nov 18, 2012
Messages
1,071
Likes
738
#3
I can't answer your question directly but here is what I did for a similar situation. Machine a slight counter bore in a hunk of aluminum to hold the thin disc. Secured with some screws and washers then bored the ID.
worn gear trued up in lathe.jpg

David
 

Dave T

Iron
Registered Member
Joined
Oct 8, 2015
Messages
10
Likes
9
#4

What I am making are fly reels. The front end ring and rear end plate here are not really brass, but c544 bronze which machines about the same. But the bronze is only available as rod stock so I saw off a slice and then face both sides to proper thickness. The screw clamps that David S. shows would not allow facing.
I made these parts using my Sherline chuck with soft jaws. The jaw steps are short enough to allow facing.
After the front end ring is faced, I can screw it to a faceplate and do all other operations.
For the rear end plate, there are many operations done while still in the soft jaw chuck. This part has to be turned over part way through, and the custom machined jaws ensure proper registration from one side to the other.
So I bought a MiniLathe because I thought that its greater torque would allow faster working. I would like like to have custom jaws for its chuck.
Gluing the parts to a faceplate would work for the front end ring. But for the rear end plate, I would still have a registration problem between the two sides.
 

David S

Active User
H-M Supporter-Premium Member
Joined
Nov 18, 2012
Messages
1,071
Likes
738
#5
Thanks Dave that helps alot. Do you have a pic of just the back plate both sides to see all the operations. Certainly looks like soft jaws would do the job.

David
 

francist

Active User
H-M Supporter-Premium Member
Joined
Sep 5, 2013
Messages
692
Likes
806
#7
Would you be able to adapt your Sherline chuck to run on the new lathe?

-frank
 

Dave T

Iron
Registered Member
Joined
Oct 8, 2015
Messages
10
Likes
9
#8
Frank,
Yes:
https://northbranchreels.com/2017/04/04/minilathe-tooling/
When I use the soft jaws that were cut on my Sherline lathe (and are therefore "perfect" on it), there is an unacceptable amount of wobble (using a dial test indicator near the edge of the plate). The answer, of course, would be to buy yet another set of Sherline soft jaws and cut them while the chuck is on the MiniLathe. Before I do that, I am looking for a source of soft jaws for the MiniLathe chuck. Or perhaps someone knows of a 4 inch chuck with two piece jaws that I can mount on my MiniLathe. LMS has many chuck adapters available.
Dave
 
[6]
[5] [7]