What is a milling insert?

Milling inserts are replaceable bits that are used to machine tough some of the toughest materials. Some of the materials that they shape or cut are steel, stainless steel, cast iron, non-ferrous materials, Titanium, hardened steel, and plastic.

Which of these inserts would be the best choice for a heavy roughing cut?

Negative inserts are strongest and the best option for roughing and general turning applications, as these will allow deeper depths of cut and higher feed rates due to strong insert shapes and thickness.

What is the strongest carbide insert shape?

A round insert can be fed up to 20 percent faster into a workpiece than other types of inserts because the tool has the strongest geometry of any insert shape.

How do I choose carbide inserts?

How to choose correct turning insert

Select insert geometry based on selected operation, for example finishing.
Select the largest possible nose angle on the insert for strength and economy.
Select the insert size depending on the depth of cut
Select the largest possible nose radius for insert strength.

How do I choose inserts?

What is the difference between positive and negative inserts?

The term positive and negative rake inserts refers to the angle between the cutting edge relative to the machined surface. If the cutting edge is equipped wiht a chip braker, positive cutting can be obtained even though the tool’s angle is negative.

What are the parts numbers for apkt 1604 insert holders?

APKT Series, Inserts and Bodies Arbor Style Holders for 1604 Insert Millstar Part Number Diameter (D1) Height (L1) Keyway Bore (D2) No. of Flutes Insert size Screw (S) Torx

How do I use the cutting edge of the apkt inserts?

The inserts have cutting edges on 1 side. They are TiN coated, which enable the inserts to work longer and are able to run at faster speeds than uncoated inserts. When a cutting edge of the APKT insert becomes dull, you just need to rotate the insert in the holder to use the sharp edge.

What does apkt stand for?

The most common APKT insert is a APKT160408 (or it can be listed as a APKT1604PDSR) Here is what each letter stands for: A=Shape of Insert (85 Degree Parallelogram) P=Side Reak Angle (11 Degrees) K=Tolerance (K is tighter tolerance on height, thickness & IC than M)

Can apkt positive-rake parallelogram milling inserts be used on stainless steel?

APKT positive-rake parallelogram milling inserts are used to machine steel. Occasionally, some customers gave us feedbacks that those inserts can be used to machine stainless steel with ideal results.