Carbide ISO Cutter Inserts for Milling Cutter RPMT

                         Carbide ISO Cutter Inserts  Milling Cutter RPMT  
 

Features:

A round insert can more easily damage a workpiece than a straight-edged insert. A round insert has a relatively large radius compared with a straight-edged insert, which has small radii at its corners. A large radius means more contact surface, which results in higher cutting forces. “This can be detrimental when applied in weak setups, extended tooling or on workpiece features that have a thin cross section,” said Dale Hill, applications engineer for toolmaker Greenleaf Corp., Saegertown, Pa. Detrimental effects include workpiece deflection and vibration.

Consequently, parts manufacturers have to maximize machine tool and workholding rigidity if they want to successfully apply round inserts.

Reasons to be Round

1.Round inserts can be worthwhile, though, because they’re strong and can be fed at higher rates than other types of inserts, more than making up for their disadvantages in certain applications.

2.Time saved via higher feed rates means money saved. “The amount of money you can save [by using round inserts] over the life of running an insert is phenomenal,” Tisdall said, adding that actual cost savings depend on a shop’s overhead, annual number of components and reduction of a part number’s process time.

3.Workholders and machine tools must be rigid to apply round inserts because the tool’s radius, relatively large compared with a straight-edged insert, means more contact area and therefore more cutting pressure.

4.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.

5.Round inserts can be made with different features, like a chamfer (upper left and lower right) and a positive rake angle (lower right), to reduce problems that can be encountered when turning high-nickel alloys.

6.Round inserts for turning high-nickel alloys may be CVD or PVD coated depending on the tool’s performance characteristics relative to a particular alloy, such as the tool’s main failure mode.

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Suitable Round Inserts' Holder: