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Blacks CNB 34

Vertical Broaching Machine

Manufacturer: Blacks
Model: 1 W-CNB 34
Machine No.: S05035C
Year of manufacture: 04/2005
Weight: 95kg

General / Technical Data:
Very well-maintained broaching machine for external broaching of notches in tensile test specimens.
Broaching speeds: variable from 0.43 to 2.27 m/min
Gsdpfx Ahjw Rpvzo Dobu
Dimensions (h x w x d): 1370mm x 600mm x 450mm
Power supply: 400 Volt / 50 Hz

Equipment:
- Variable speed adjustment via a mechanical variable speed gearbox (brand: Lenze), no electronic control!
- Clamping device for tensile test specimens
- 3 broaching tools (used)
- Machine documentation in German and English
- Machine documentation with "CE" declaration of conformity in English

General Information
The dual spindle drive ensures stable and centralized pulling as well as consistent and uniform broaching speed. The broaching machine is a purpose-built machine for cutting V- and U-notches according to Charpy and Izod standards in pre-machined 10 mm standard square specimens.
The CNB-34 produces a uniform notch of higher quality than can be achieved by milling. The machine is easy to operate and features a robust design, with removable service panels for easy routine maintenance. The construction enables a convenient working height.
During the cutting process, a specially designed broaching tool is drawn across the specimen. The broaching tool is pulled downward inside the machine via a gearbox and dual spindle drive. The specimen is fixed in place within the machine by means of a special clamping device. The broaching tool is moistened with cutting oil. By pressing the broaching stroke button, the notching tool is positively guided downwards along the specimen, producing an accurate notch profile. After broaching, the specimen must be removed before returning the tool. The tool is returned without the workpiece and cleaned of resulting chips; only then is the unit ready for the next operation.

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