Hi Guys,

Welcome to share with me the comments of above subject.??Why people need? 60 , 30 degrees for cutting ?? In what condition, what material, what applications we need these angles ???
Any comments will be highly appreciated.?
Thanks.

开云体育

Depends on what you are doing.
I used to make a lot of parts for processing equipment, which required various angles, including 30 & 60 degree.
Most common is 45 degree, for miter cuts on square corners, but some things require different angles.

Attached is an example: Feeder spouts, cut at a 30 degree angle, made of 304L. I made a cutting fixture just for such angles.
Building any exhaust system parts? 30 degree is common for outlet tips. I've built some of those too.

Other Bill

Hi Guys,

Welcome to share with me the comments of above subject.??Why people need? 60 , 30 degrees for cutting ?? In what condition, what material, what applications we need these angles ???
Any comments will be highly appreciated.?
Thanks.

开云体育

These little guys are cut at 40 degrees.
(attached)

Other Bill

Actually 18 degs’ , Just needed a little filing to clean up and square

The 30° and 60° references as standards are usually found when operating a lathe.

The tool rest slides on a compound that rotates and has graduations in degrees with 0° being parallel with the axis, 90° is therefore perpendicular to the axis. The tool rest advance is graduated in thousandths of an inch, either in reference to the diameter of the part being machined or in reference to the radius of the part being machined, depending on the brand and model of the lathe. Either way when changing the Depth of Cut (DOC) one can use either the cross slide for direct measurement or one can use the tool post advance. If the tool post is set to 60° and the tool rest is advanced 1 graduation of the dial the change in DOC is 1/2 the reading on the dial. When making facing cuts (reducing the length of the workpiece) setting the compound to 30° will advance the tool into the work 1/2 the reading on the dial.?

The math behind this and other tricky lathe compound settings are far beyond the scope of this thread so please do not drag this on here, there are other forums for that. One in particular you may find interesting (if you are not already a member): /g/atlas-craftsman

Raymond

hi, David:
thanks for your reply, how about 45 and 60 degrees? or just only 18 you use mostly??

Henry

Hi, Bill:

THanks for your sharing, appreciate it.?

Just needed 2 cuts at 18 but the only picture I had, I have made an occasional cut at 45 never 60

开云体育

You're welcome!

Other Bill

Hi, Bill:

THanks for your sharing, appreciate it.?