Boring Bar B-Clamp



  • Manufactured from High Tensile Steel to provide better yield strength under heavy working conditions.
  • Used for cutting operations inside bores and pipes.
  • The clamp holds the negative type insert rigidly in place for stability during operations.
  • The inserts can be easily and rapidly replaced once worn down thus saving machining time and cost.
  • Rust preventive black oxide finish.
  • Inserts can be provided on request.
Boring Bar B-Clamp

Nomenclature

Boring bars are used for material removal from the internal surface of the workpiece through operations like longitudinal turning in order to obtain the required bore diametre, length and contour.They are available in a number of shapes and sizes each having their distinguish entering/lead angle, seat inclination angle and clamp styles. 

Effects of cutting geometry

Nose Radius

The angle formed between the main and the auxiliary cutting edge of the insert is called the nose radius. The larger the angle, higher is the cutting edge strength of the insert. Thus a higher nose radius is preffered for roughing operations. However, large nose radius also gives rise to higher distribution of cutting forces, both axially and radially, therefore increasing the power consumption as well as the vibration tendencies. Inserts with smaller nose angles are prefered for finishing, profiling or for turning intricate contours inaccessible to larger radii.

Holder shapes

Different holders are available for different entering angles and insert clearances. 

Rigid and lever clamping methods facilitate mounting of negative inserts (N) or inserts with 0° clearance angle, whereas screw clamping methods facilitates the clamping of N type inserts as well as inserts with some positive clearance angle.

Positive inserts consume lower power for material removal and exert lower forces. As the clearance angle increases, the strength of the cutting edge decreases. Negative inserts on the other hand provides higher edge strength but consume more power and exert higher cutting forces.

Type Size

Dimension

(mm)

Carbide Insert

Action

H L D
APPROACH ANGLE 95°

BCLNR/L

S25R BCLNR/L12 25 200 32

CNMX 1204XX

S32S BCLNR/L12 32 250 40
S40T BCLNR/L12 40 300 50
APPROACH ANGLE 95°

BWLNR/L

 

S25R BWLNR/L06 25 200 32

WNMX 0603XX

S32S BWLNR/L06 32 250 40
S25R BWLNR/L08 25 200 32

WNMX 0803XX

S32S BWLNR/L08 32 250 40
APPROACH ANGLE 107.5°

BTQNR/L

 

S25R BTQNR/L16 25 200 32

TNMX 1604XX

S32S BTQNR/L16 32 250 40
S40T BTQNR/L16 40 300 50
S50U BTQNR/L16 50 350 63
APPROACH ANGLE 93°

BTUNR/L

S25R BTUNR/L16 25 200 32

TNMX 1604XX

S32S BTUNR/L16 32 250 40
S40T BTUNR/L16 40 300 50
S50U BTUNR/L16 50 350 63
APPROACH ANGLE 60°

BT-NR/L

S25R BT-NR/L16 25 200 32

TNMX 1604XX

S32S BT-NR/L16 32 250 40
S40T BT-NR/L16 40 300 50
S50U BT-NR/L16 50 350 63