Universal rotary diamond burnishing tool ST21-20M is used for finishing and hardening surfaces of parts in hard-to-reach areas of parts, radii, cones, ends, holes, hemispheres, hollows, outer surfaces, bottoms and radii at bottoms.
Version with adjustable burnishing force, for processing various parts. Workpiece shape - cylinder, bodies of rotation, cone, fillet, bottom Minimum Diameter of workpiece to be machined 6mm. Metric tool holder 20*20 3/4" inch holder Minimal diameter of the work hole : 63mm Depth of the work hole : 230 mm Natural diamond (PA) indenters are used The tool is used for dressing. Diamond Capping (AB) and the Tool completely replace the grinding and polishing area.
Costs for personnel, grinders, consumables are reduced, no re-setting of parts and no re-basing is required.
Roughness is smoothed to the level of Ra = 0.2.....0.05 μm in one or two passes
It is used on CNC machines, on conventional lathes. To obtain a stable wave-free surface micro-profile it is recommended to use ST-21 on machines that can provide finishing turning! Materials of machining: any structural steel with a hardness of max. HRc 65 Surface roughness before machining not more than Ra = 1.25 µm Example of details - stems of hydraulic cylinders, slide valve stem, pump heel, shaft, shaft surface under bearings. STANDARD PROCESSING MODES ARE AVAILABLE AFTER PAYMENT OF THE INVOICE! Smoothing tip, diamond trowel, micro-smoothing, hardening, rolling polishing, diamond burnishing (AB).
ATTENTION!!!!
The tool is not used for burnishing Titanium, Niobium, Zirconium because of the high toughness of the material!!!
Quality of chrome plating can be improved by diamond burnishing of its surface. This treatment seals the surface layer and eliminates sealing breaches in the tight joints of chromium-plated parts caused by the presence of micro cracks in the chromium.
Mirror finishing rolling tools
Mirror-like metal surface Diamond burnishing provides increasing the hardness of surfaces of dies and punches more than 1500 NV. Surface roughness of the tool surface decreases to Ra 0,1 micron. Depth of the hardened layer is 50...150 µm.
Minimization of the surface microrelief makes it possible to additionally increase the die resistance indentor radius.
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