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Jones and Shipman’s Suprema cylindrical grinding machine can be specified with a 63m/sec wheel speed and a range of options to enable it to be tailored to production or toolroom requirements.

Available in a 90deg approach or in a universal, swivelling wheelhead configuration with the incorporation of an internal grinding spindle, the Suprema range covers three versions based on length grinding capacities of 650, 1,000 or 1,500mm, each with a maximum grinding diameter of 300mm.

Each machine uses Fanuc multi-axis control and touchscreen with twin membrane operating panels utilising the J and S self-teach suite of programming software.

The software will easily accommodate one diameter, a single component or a series of linked features to meet multi-diameter and multi-face grinding requirements for batch production.

Constructed on a single ‘Tee Bed’ casting with hand-scraped twin vee and flat slideways, there is a choice of a universal swivelling wheelhead with air cushion and pneumatic clamping or straight 90deg approach.

With the universal wheelhead, wheels up to 350mm diameter by 50mm wide can be mounted on the left side and wheels up to 300mm diameter by 25mm on the right.

The grinding spindle is powered by 4.2kW drive, giving a surface speed of 33m/sec.

Also incorporated on the wheelhead is 16,500rev/min internal grinding spindle that is capable of grinding bores between 10 and 80mm diameter powered by belt from a 2.2kW motor.

Should the 90deg approach wheelhead option be specified, wheels up to 450mm diameter by 50mm can be used with speed rating of 45 or 63m/sec from a 7.5kW drive.

Constant wheel speed is programmable.

Live and dead centre workhead with -15 to 90deg swivel are included in the universal machine and dead-centre type in the fixed head.

A variable speed drive with direct programming between zero and 660rev/min or constant surface speed can be programmed.

A plain or taper correction tailstock is available to accept component loads up to 100kg between centres.

Respective table swivels are +/-9, +/-8.2 and +/-5 on the 650, 1000 and 1500 machine versions.

The Fanuc control is interfaced with two ergonomically positioned control panels – the left with Z-axis manual control via pulse generator and the right with a pulse generator and X-axis digital readout.

The flexible icon-based user interface is able to maintain up to 20 linked grinding cycles in its automatic operational mode.

Wheel dressing can be automatic or manual with fully compensated dressing of straight or complex profiles and extra grind cycles for thread or peel grinding, taper traverse and contouring are available.

Shoulder diameter and gap elimination is also available as an option, as well as shoulder probing and automatic or semi-auto wheel balance.

Jones and Shipman Precision

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