Boring Bar M-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 M-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°

MCLNR/L

 

S20R MCLNR/L12 20 200 24

CNMX 1204XX

 

S25R MCLNR/L12 25 200 30
S32S MCLNR/L12 32 250 38
S40T MCLNR/L12 40 300 47
S50U MCLNR/L12 50 350 60
APPROACH ANGLE 75°

MCKNR/L

 

S20R MCKNR/L12 20 200 24

CNMX 1204XX

 

S25R MCKNR/L12 25 200 30
S32S MCKNR/L12 32 250 38
S40T MCKNR/L12 40 300 47
S50U MCKNR/L12 50 350 60
APPROACH ANGLE 75°

MCWNR/L

S20R MCWNR/L12 20 200 27

CNMX 1204XX

S25R MCWNR/L12 25 200 31
S32S MCWNR/L12 32 250 39
APPROACH ANGLE 107.5°

MDQNR/L

 

S25R MDQNR/L11 25 200 30 DNXX 1104XX
S25R MDQNR/L15 25 200 32

DNXX 1504XX

S32S MDQNR/L15 32 250 42
S40T MDQNR/L15 40 300 50
S50U MDQNR/L15 50 350 63
APPROACH ANGLE 95°

MDUNR/L

 

S25R MDUNR/L11 25 200 30 DNXX 1104XX
S25R MDUNR/L15 25 200 38

DNXX 1504XX

S32S MDUNR/L15 32 250 47
S40T MDUNR/L15 40 300 50
S50U MDUNR/L15 50 350 60
APPROACH ANGLE 93°

MDZNR/L

S25R MDZNR/L15 25 200 30

DNXX 1504XX

S32S MDZNR/L15 32 250 38
S40T MDZNR/L15 40 300 47
S50U MDZNR/L15 50 350 60
APPROACH ANGLE 62.5°

MDWNR/L

S25R MDWNR/L15 25 200 34

DNXX 1504XX

S32S MDWNR/L15 32 250 41
S40T MDWNR/L15 40 300 47
S50U MDWNR/L15 50 350 60
APPROACH ANGLE 91°

MTFNR/L

S20R MTFNR/L16 20 200 25

TNXX 1604XX

S25R MTFNR/L16 25 200 30
APPROACH ANGLE 95°

MWLNR/L

 

 

 

 

S16Q MWLNR/L06 16 180 19

WNXX 0604XX

S20R MWLNR/L06 20 200 23
S25R MWLNR/L06 25 200 30
S20R MWLNR/L08 20 200 23

WNXX 0804XX

 

S25R MWLNR/L08 25 200 30
S32S MWLNR/L08 32 250 38
S40T MWLNR/L08 40 300 47
S50U MWLNR/L08 50 350 60
APPROACH ANGLE 117.5°

MVQNR/L

S25R MVQNR/L16 25 200 30

VNXX 1604XX

S32S MVQNR/L16 32 250 38
S40T MVQNR/L16 40 300 47
S50U MVQNR/L16 50 350 60
APPROACH ANGLE 95°

MVUNR/L

S25R MVUNR/L16 25 200 30

VNXX 1604XX

S32S MVUNR/L16 32 250 38
S40T MVUNR/L16 40 300 47
S50U MVUNR/L16 50 350 60
APPROACH ANGLE 72.5°

MVWNR/L

S25R MVWNR/L16 25 200 35

VNXX 1604XX

S32S MVWNR/L16 32 250 42
S40T MVWNR/L16 40 300 55
APPROACH ANGLE 95°

MVXNR/L

 

S20R MVXNR/L16 20 200 24

VNXX 1604XX

 

S25R MVXNR/L16 25 200 30
S32S MVXNR/L16 32 250 38
S40T MVXNR/L16 40 300 47
S50U MVXNR/L16 50 350 60