We supply -> Electroerosion -> Graphite for EDM

It is used in machine building in the manufacture of working parts of press molds (dies and punches) as electrodes, repeating the profile of the required part, on EDM punch machine.

The forming is the destruction of the metal layer under the action of a high voltage electric current passing through the graphite electrode, and the subsequent slag cleaning from the cutting zone. The resulting shape in the metal corresponds to the shape of the tool electrode.

Specification

Graphite grade	100	200	300	400	500
Shore hardness	45	53	58	65	68
Thickness	1.68	1.75	1.85	1.85	1.90
Flexural strength, MPa	320	540	570	650	770
Grain size, µm	25	10	8	6	4
Wire cutting capability	Possibly	Good	Good	Very good	Very good
Ra µ	12,5	3,1	1.8	1.1	0.8 (0.6)
Max dimensions of standard block	1000×600×300	1000×600×300	1150×600×300	1150×600×300	1000×500×200

The blocks are cut according to the dimensions specified by you, taking into account the maximum dimensions of the standard block.

Selection guideline

100	For making large molds, best performance with mild wear. For roughing large radii and surfaces.
200	For rough machining in the production of almost any volumetric part.
300	For roughing with grooves and ribs up to 5.0 mm
400	Wide application in the production of equipment with normal requirements for good surface and precise shapes. Best performance with a single electrode with up to 1.0 mm fin processing
500	Strength and precise shapes are the most important qualities of this electrode. Productivity decreases with increasing surface quality. Suitable for surface areas or caves of about 0.5 mm