Tacchella Elektra
Tacchella Elektra: the universal grinding machine
Tacchella Elektra is the new cylindrical grinding machine for both external and internal use for small and medium-sized workpieces, diameters up to 450 mm and workpiece lengths up to 1700 mm; internal grinding diameter up to 400 mmm.
Elektra has always been synonymous with quality, versatility, cutting-edge technology and ease of use. Its main fields of application are general precision mechanics, aerospace, and electric motors. Thanks to its high configurability and wide range of accessories, it guarantees the satisfaction of the most demanding customers.
A success story
More than 20 years after its launch, during the 1997 EMO in Hanover, Elektra has earned an important reputation becoming an icon of Made in Italy universal grinding machines in the world. Today as yesterday it remains synonymous with quality, versatility, avant-garde and ease of use.
Its main feature lies in the various possible conformations of the grinding head which represents the heart of the machine and allows you to position more tools in various combinations. In fact, two, three, four external or internal grinding wheels can be installed which can be used in succession for the required machining thanks to the automatic B axis driven by a torque motor.
The primary objective of the Elektra range is therefore perform the entire machining of the piece in a single grip with all the ensuing advantages: better surface quality, better concentricity between the circumferences machined, less space occupied in the workshop, fewer manipulations, reduced costs and logistics.
Elektra: available models
Elektra 700
- Distance between the centers: 700 mm
- Available in two wheelhead configurations
- Max. weight between centers: up to 350 kgs
- Centers height: 180 mm – 230 mm – 260 mm
Elektra 1200
- Distance between the centers: 1200 mm
- Available in two wheelhead configurations
- Max. weight between centers: up to 350 kgs
- Centers height: 180 mm – 230 mm – 260 mm
Elektra 1700
- Distance between the centers: 1700 mm
- Available in two wheelhead configurations
- Max. weight between the centers: up to 350 kgs
- Centers height: 180 mm – 230 mm – 260 mm
Details that make the difference
Wheel carriage (X axis)
Carriage on extra-precise re-circulation rollers slides. Transversal movement by high precision recirculating ball screw driven through coaxial couplings by A.C. BRUSHLESS motor, carriage position control through absolute linear measurement system with resolution 0,0001 mm complete with pressurized air system.
Cast iron basement
Monolithic structure in stabilized cast iron basement with peripheric channels for coolant recovery and conveyance. Machine mainframe is designed using 3D solid parametric modelling and FEM analysis.
Software Tool Operator Package
Our interactive software T.O.P. (Tool Operator Package), dedicated to grinding, guides the operator step by step on how to operate the machine in compliance with safety regulations. The software allows to easily manage automatic grinding cycles, roughing, semi-finishing, finishing and flash hider during plunge grind and reciprocating grind cycles.
This man-machine interface uses a few simple pages with graphic support. The operator can set up operations to perform through guided procedures and the execution of all available workings.
Workhead
The standard workpiece-holding head on a fixed and rotating spindle base is mounted on high-precision bearings for machining between centres or cantilevered and has a load capacity of 100 kg at 100 mm from the spindle nose. The motor allows progressive speed variation by means of an AC BRUSHLESS coaxial motor. To facilitate the movement during machine set-up, the unit is equipped with a pneumatic lightening device. Additional workpiece-holding heads with a load capacity of 170 and 250 kg are available as options.
Tailstock
The standard tailstock with lever control for 120 kg capacity between centres and Morse 4 attachment taper. Equipped with an integrated micrometric workpiece cylindricity correction system and a pneumatic lightening system to facilitate movement during machine set-up. An optional hydraulic version is available to increase the capacity between centres up to 350 kg.
Swivelling wheelhead (B axis)
“B” Axis, resolution 0,0001°, for the automatic orientation of th grinding wheel head on any angular position, freely programmable, between +20° e -210°, for face/external grinding operations and internal grinding. The axis is locked by means of a Tacchella “Quick Clamp” device.
Discover the possible configurations
Tacchella Elektra allows very high configurability of the grinding wheel unit, so as to meet the most different requirements, and focus on external grinding, internal grinding or both: for example, you can have up to 4 external grinding wheels (LR/LR configuration), or 2 internal spindles and one external grinding wheel (R/I/I configuration), or even two external electrospindles and one internal electrospindle (L/I/R)
Discover the possible workings
Tacchella Elektra universal grinding machines perfectly meet the most different external and internal grinding requirements, from one-off workpieces to medium production. Optional packages for polygons, threads and non-round machining are available.
Operating video: watch an internal external grinding running machine
Technical features
| Technical features | Elektra 700 | Elektra 1200 | Elektra 1700 |
| Distance between the centers [mm] | 700 | 1200 | 1700 |
| Max. grinding lenght [mm] | 700 | 1200 | 1700 |
| Centers height [mm] | 180 (230-260) | ||
| Max. grinding diameter [mm] | 300 (400) | ||
| Max. peso tra le punte [kg] | 120 (250) | ||
| Potenza installata senza accessori [kW] | 30 | ||
| Peso totale macchina senza accessori (kg] | 6000 | 6500 | 7500 |
| Testa porta mola | |||
| Diam. Max. mola x spessore max. x diam.foro (mm] | 508 x 80 (100) x 203,2 | ||
| Portenza motore mola [kW] | 8,2 | ||
| Velocità periferica mola [m/sec] | 50 | ||
| Orientamento angolare (-15°/+195°) | Manual – B axis – B axis | ||
| Unità rettifica interni | Opt. | ||
| Asse trasversale “X” | |||
| Corsa max. [mm] | 400 | ||
| Velocità max. [m/min] | 12 | ||
| Coppia Motore [Nm] | 8 | ||
| Risoluzione [mm] | 0,0001 | ||
| Asse longitudinale “Z” | |||
| Corsa max. [mm] | 900 | 1330 | 1830 |
| Velocità max. [m/min] | 12 | ||
| Coppia Motore [Nm] | 8 | ||
| Risoluzione [mm] | 0,0001 | ||
| Testa portapezzo | |||
| Cono attacco Int. /ext. | Morse 5 / ASA 5 | ||
| Gamma velocità [rpm] | 10 ÷ 700 | ||
| Coppia motore mandrino [Nm] | 36 | ||
| Contropunta | |||
| Cono attacco interno | Morse 4 | ||
| Diametro canotto [mm] | 60 | ||
| Corsa max. canotto [mm] | 35 (70) | ||
| Correzione cilindricità [mm] | ±0,10 | ||
