A universal CNC cylindrical grinding machine has a rotatable wheel head that can be changed from straight to 30 deg angle approach, giving more flexibility in batch production.

Toyoda Machinery's latest CNC universal grinding machine, to be shown by the 600 Centre at the UK's MACH 2008 exhibition, has the flexibility of being able to be changed from straight to 30 deg angle approach by rotating the wheelhead. The design, said 600 Centre to manufacturingtalk.com, will satisfy users in the small to medium batchwork business requiring a competitively priced precision machine for parts up to 300mm diameter by 1000mm between centres.

The Select G-100 employs the latest STAT hybrid spindle bearing that combines the benefits of hydrostatic and hydrodynamic technology providing higher spindle stability than is available with conventional bearings.

When at rest, the hydrostatic pressure maintains the wheel spindle in the centre of the bearing eliminating any metal to metal contact during rotation.

This configuration improves damping and rigidity and absorbs vibration, said 600 Centre.

Minimum incremental input is 0.1 micron.

The machine has a maximum swing of 320mm and will accept between centres load of up to 150kg.

The wheelsize is 510mm by 100mm by 203.2mm bore, is run at 45m/sec and is driven by a 7.5kW motor with inverter control.

An MT4 centre workhead is driven by 1.1kW servo motor that is programmable between 21 and 500 rev/min.

For higher accuracy requirements the spindle centre can be fixed and the workpiece driven by rotation of the face plate.

The workhead can also be swivelled between - 30 deg to +90 deg.

Table stroke is 1345mm and is able to be swivelled between 0 deg and 10 deg.

Rapid feed rate is 10m/min.

* CNC - the 2-axis Fanuc 21iTB, 32-bit absolute control holds 39 different basic grinding cycles with some 20 processes per cycle that can be displayed through the simple to read operator interface.

This screen is also able to depict automatic dressing cycles.

Standard fitments include a 200 litre soluble coolant tank with magnetic separator while gap elimination is an option and in-process gauging for diameters between 5mm and 80mm is available.



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