Vardex - Frequently Asked Questions

VARDEX USA FAQ's

Thread Turning FAQ's

Q: What is the difference between partial profile and full profile?

A: Partial profile inserts don't cut the minor diameter (do not make calibration) while full profile inserts cut the minor diameter.

Q: What is the advantage of the partial profile inserts?

A: One insert covers a wide range of pitches.

Q: What are the disadvantages of the partial profile inserts?

A: The insert nose radius is smaller than defined in the standard. This results in a thread that is not according the standard and in shorter tool life.

Q: What are the functions of the anvil?

A: To support the insert cutting corner, to protect the holder body in case of insert breakage and allow the adjusting of the helix angle by changing the anvil.

Q: Is it possible to produce a LH thread with a RH toolholder and RH insert?

A: Yes it is possible by changing the anvil and infeed method.

Q: Is it possible to produce multi starts threads with Vardex standard insert?

A: Yes, it is possible (remember! lead = pitch multiplied by the no. of starts).

Q: What is the recommended infeed method ?

A: Flank infeed has a better chip control and surface finish in most raw materials and applications.

Thread Milling FAQ's

Q: What infeed method does VARGUS use in the TM Gen?

A: We recommend and use the tangential ARC method.

Q:What happens if a larger tool is used (larger d2) than recommended by VARGUS tables?

A: A profile distortion will occur.

Q: What is "thread distortion"?

A: The difference between a thread form according to the standard and the actual thread form on the workpiece.

Q: How much does the TM Gen cost and how can I get it?

A: Free of charge from your local dealer.

Q: How can a thread longer than the insert itself be machined?

A: You make once cycle, then move the tool in a "z" direction and machine a second cycle.

Q: What is the max. length for special tools?

A: It is difficult to give a general answer because it depends on workpiece material, machine conditions, pitch and clamping system. Please ask us for your specific application.