jayashankar

• Jan 20th, 2012

 

We can cut the square section in lathe by 4 jaw chuck lathe.

vijay kumar

• Jan 20th, 2012

 

Square section cannot be cut in lathe.

somashekar naidu

• Feb 2nd, 2012

 

it is not possible because when spindle rotates how can we make square components

SONU KUMAR

• Feb 4th, 2012

 

It is impossible to cut a square piece on lathe on a round piece. But here in the question; the type of raw material is not mentioned that it is round piece or it is square piece. Now if we consider it is a square type rod and fixed in four jaw chuck then it is possible to cut a square pieces from that square rod type raw material by grooving..

THOAHLANE RAMOFOLO

• Feb 21st, 2012

 

4 Jaw chuck make it possible folks.

ravinder ranjan

• May 29th, 2012

 

Fix the piece in four jaw chuck perpendicular to the axis of lathe and move the tool same as for facing the round piece then the piece became round.

ADIREDDI

• Aug 5th, 2014

 

By using 4-jaw check with facing operations on four sides of the circular bar. 4-jaw check has high gripping capacity then 3-jaw check.

ravi patel

• Aug 8th, 2014

 

Fix the piece in four jaw chuck perpendicular to the axis of lathe and move the tool same as for facing the round piece then the piece became round.

ashraf ali

• Aug 30th, 2014

 

Cannot be cut on lathe

viji

• Sep 26th, 2014

 

Fix the piece in four jaw chuck perpendicular to the axis of lathe and move the tool same as for facing the round piece then the piece became round.

dinesh

• Nov 8th, 2014

 

Can't cut

Prakash

• Nov 10th, 2014

 

Not possible

tanmoy ghosh

• Nov 19th, 2014

 

its possible. holding the job with jig and fixture and doing facing operation repeatedly.

Chiragh

• Dec 20th, 2014

 

By holding the square job in a four jaw chuck

Ramanth Bhat

• Dec 25th, 2014

 

Its possible by using 4 chuck in the fixture

MOHAMMED SHADAB ANSARI

• Mar 2nd, 2015

 

Square parts on a mini-lathe with a 4 jaw independent chuck

It is not initially aparent to the new mini-lathe owner that they can make square parts on their mini-lathe. Using a 4 jaw independent chuck it is possible to mount stock on all sorts of strange and interesting ways. An artifact of this means that you can actually machine a pretty good square part using a lathe. Of course, a lathe turns things, and normally you expect to make round things on a mini-lathe. However, a mini-lathe is also very good at cutting flat smooth surfaces - i.e. by facing. As a sqaure part is simply a collection of flat faces, then it is not suprising that you can make square parts on a mini-lathe.

The standard chuck on a mini-lathe is a 3 jaw chuck. Such chucks are not good at gripping square things. They are only for gripping round things. However, the 4 independent jaws of a 4-jaw chuck mean that yo can grip pretty much whatever you want, with a little bit of creative thought!

I have some unused stock which was part of an old driveshaft. I decided to have a play one afternoon and make a strange yet interestings (and utterly pointless) sqaure thing to demonstrate making a square thing on the mini-lathe.
Here is the raw stock. As you can see it is predominately round. It features a round bore down the middle and an rought round exterior. Even the ends are roughly cut and not even remotely true. a peice of rough stock

The first step is to mount the stoc k on the mini-lathe. Ive used a 4 inch 4 jaw independent chuck. Mounted in this fashion it is extremely secure and I am able to make quite heavy cuts. mounting the stock on the 4 jaw independent chuck on the mini-lathe

Now we take some normal facing cuts on the outside edge. Because of the irregular shape being presented to the facing tool, the forces on the part will be heavier than normal facing of round stock. The 4 jaw chuck on the mini-lathe is more than capable of holding the part firmly. facing up the first side of the stock

Now we turn the part around in the 4 jaw independent chuck. The newly faced surface is placed flat against the (hopefully) flat face of the chuck. We then face the newly presented front face. This gives, hopefully, two opposite faces which are parallel. turn around and do the other side

Here we are towards the end of the second facing operation on the mini-lathe. The round stock is now starting to look more like a square thing - a bit like a fig roll. facing another side

Now, using these two newly faced parallel sides we can re-mount the part in the 4 jaw chuck once more. another side using the true sides to mount in 4 jaw chuck

More facing. more facing on the mini-lathe

After 4 facing operations we now four square sides on the long axis of the job and can now mount it the other way around so that the ends can be faced. making the ends square

To clean up some jaw marks from the 4-jaw chuck, I mount the part carefully using spacers and take a fine finishing cut. a light finishing cut

And here is the completed square part. We have made a square part on the mini-lathe using a 4-jaw independent chuck. This basic principle can be extended.... finished sqaure part made on the mini-lathe

With a bit of creative thought, even the most irregular parts can be held in the 4 jaw independent chuck. We can then take facing cuts on the end to get a nice flat surface - probably a surface of better quality than can be obtained using my micro mill, and certainly a lot more quickly. mounting irregular parts on a 4 jaw independent chuck on the mini-lathe

Vivek

• Dec 19th, 2017

 

Its possible on a 3 jaw chuck also. Because I just did. I machined a 1mm thick aluminium square pipe in a 3 jaw chuck lathe. I just held the 3 (of)corners of tube on three chucks.