Our Charpy/Izod Notching Broaches meet most standards i.e. BS, ISO, EN, ASTM and many other International Standard notch profiles.
Due to the variety of broaches and notch configurations, broaches are ordered separately.
All broaches, which have a unique serial number, are tested to ensure that they cut the correct form before despatch and a Certificate of Conformance is issued with each broach.
Our broaches are manufactured using the latest CNC grinding techniques at our factory in Kent, giving customers the reassurance that they are purchasing a quality product.
STANDARD BROACHES
Our standard broaches are designed for use on carbon and low alloy steels.
DRAWING
NUMBER
| BROACH
TYPE | NOTCH | DEPTH | ANGLE | RADIUS | BROACH
KEEP | CARBON & LOW ALLOY STEELS | COMMENT |
| CNB30-027A2 | C | V | 2mm | 45˚ +/- 1˚ | 0.25mm +/-0.025 | X | < 42 HRC | |
| CNB30-028A2 | M | V | 1mm | 45˚ +/- 1˚ | 0.25mm +/-0.025 | X | < 42 HRC | |
| CNB30-002A2 | H | V | 3.3mm | 45˚ +/- 1˚ | 0.25mm +/-0.025 | X | < 40 HRC | For use on round specimens. |
| CNB30-035A2 | T | V | 3.5mm | 45˚ +/- 1˚ | 0.25mm +0.020/-0.025 | X | < 35 HRC | GOST 9454 (0.1/0.27mm radius). |
| CNB30-004A2 | JS | U | 5mm | | 1 mm +/-0.025 | Y | < 32 HRC | With packer CNB30-029A4 - 2 cuts required. |
| CNB30-005A2 | N | U | 2mm & 3mm | | 1 mm +/-0.025 | Y | < 32 HRC | When cutting 2mm depth, only 2/3rd of cutting length is used. |
| CNB30-006A2 | P | U | 2mm | | 1 mm +/-0.025 | Y | < 35 HRC | |
HARD CUT COATED BROACHES
This is a superior broach to the standard broach and is recommended for use on our Variable Speed Machine for tougher, harder and stainless steel materials to extend tool life.
If used on our Hand Machine, tool life is dependant on a smooth cutting action by the operator and the machining difficulty of the material.
DRAWING
NUMBER
| BROACH
TYPE | NOTCH | DEPTH | ANGLE | RADIUS | BROACH
KEEP | CARBON & LOW ALLOY STEELS | COMMENT |
| CNB30-027A2H | C | V | 2mm | 45˚ +/- 1˚ | 0.25mm +/-0.025 | X | < 52 HRC | |
| CNB30-028A2H | M | V | 1mm | 45˚ +/- 1˚ | 0.25mm +/-0.025 | X | < 52 HRC | |
| CNB30-002A2H | H | V | 3.3mm | 45˚ +/- 1˚ | 0.25mm +/-0.025 | X | < 50 HRC | For use on round specimens. |
| CNB30-035A2H | T | V | 3.5mm | 45˚ +/- 1˚ | 0.25mm +0.020/-0.025 | X | < 45 HRC | GOST 9454 (0.1/0.27mm radius). |
| CNB30-004A2H | JS | U | 5mm | | 1 mm +/-0.025 | Y | < 42 HRC | With packer CNB30-029A4 - 2 cuts required. |
| CNB30-005A2H | N | U | 2mm & 3mm | | 1 mm +/-0.025 | Y | < 42 HRC | When cutting 2mm depth, only 2/3rd of cutting length is used. |
| CNB30-006A2H | P | U | 2mm | | 1 mm +/-0.025 | Y | < 45 HRC | |
