Choose a general-purpose guide.

  • The reliable clamping of the blade and the tool holder is the basic premise to keep the stability in turning.
  • The handle type is determined by the primary offset angle, shape, and size of the blade used.
  • The selection of the tool holder system is mainly based on the type of working procedure.
  • Another important choice is whether to use a negative or positive rake blade.
  • Choose modular tools whenever possible.

Guide for selection of cylindrical turning inserts

Four main areas of application

One

Longitudinal turning/end turning

The most common turning process

  • A diamond-shaped c-80° blade commonly used.
  • Hilts with the main declination angles 95° and 93°, and Angle of entry-5° and-3° widely used.
  • The replacement options for type C are type D 55°, type W 80°, and type T 60°.

Two

Copying cutting

Generality and accessibility are the determining factors

  • To obtain satisfactory machining results, the effective central deflection angle Kapr cut-in Angle Psir should be considered.
  • The most commonly used central deflection angle is 93°, and the Angle of entry is-3° because it allows for an internal profiling angle of 22°-27°.
  • The most widely used blade shapes are d-55° and v-35°.

Three

End Turning

The cutter feeds along the Radial Direction

  • Note the cutting speed, which will change gradually as the feed goes along the radial direction.
  • The standard principal declination angles are 75° and 95° / 91°, and the Angle of entry is 15° and-5° /-1°.
  • c-80° and s-90° blades commonly used.

Four

Profile cutting

A method of machining or widening a shallow groove

  • The circular blade is ideal for inserting vehicles because it can use for both radial and axial feed.
  • A round edge with 90° handles commonly used.

Benefits of large and small principal declinations

One

Benefits of a large deflection angle

The Angle of large principal deflection and small Angle of entry

  • The cutting force directed to the chuck
  • capable of shoulder turning
  • higher cutting force when cutting in and out of the workpiece
  • Wear and tear of grooves is prone to occur in the processing of superalloys and hard materials

Two

Benefits of small principal declination

Small Main Deflection, large Angle of entry

  • The chips produced are thinner
  • productivity growth
  • groove wear reduced
  • the shoulder can not turn

Central deflection angle and profile angle

  • In profiling turning, the cutting conditions vary with the depth, chip thickness, degree, and cutting speed.
  • Choose the maximum blade angle suitable for the blade to ensure strength and cost-efficiency. Still, the blade accessibility must also be considered when considering the blade angle to ensure proper clearance between the material and the cutting edge.
  • The most commonly used knife points are 55° and 35°.
  • Both the central deflection /Angle of cut and the Angle of tooltip are essential factors affecting accessibility. Choose the most suitable profile angle; the profile of the workpiece must be analyzed.
  • A minimum of 2° corners of avoidance must be maintained between the workpiece and the blade.

Axial and radial cutting forces

One

Large central deflection angle (small Angle of entry)

  • The cutting force directed to the chuck. Vibration trend reduction.
  • Higher cutting forces, especially when cutting in and out of the workpiece.

Two

Small Main Deflection Angle (large Angle of cut)

  • The cutting force distributed along with both axial and radial directions.
  • Reduced load on the cutting edge.
  • The cutting power distributed along with both axial and radial directions.
  • Vibration trend.