Jato develops JAL636-PL pneumatic cylinder

Jato Precision has developed the JAL636-PL - a 6,500rev/m open-centre pneumatic cylinder with a 36mm through-hole, designed for actuation of 5c collets

The JAL636-PL pneumatic cylinder has low temperature rising to avoid thermal error of spindle system of CNC lathes, and it also largely decreases building cost of the machine since no hydraulic pump, tank and cooler is needed.

The cylinder is powered by compressed air, and the temperature rising of the cylinder body is less than eight digresses Celsius when running at 6,500rev/m.

JAL636-PL comes with compact size and low mass, 162mm (6.38in) in diameter, 144mm (5.67in) in length, and 7.2kg (15.8 lb) in weight.

The pneumatic cylinder is designed to actuate 5C or compatible spring collets whose tapered angle is less than 10 deg.

The pulling force of the JAL636-PL is enhanced to 935kgf (2057 lbf) when input air pressure is 7kg/cm2 (100 lb/in2) by embedded elastic springs.

This also ensures the work-part will be clamped when the cylinder loses input air pressure suddenly.

More industrial parts are smaller in size and are required to be more accurate in dimension than they were in the past.

Many machine builders find hydraulic cylinders which are being used most commonly in the industry as actuator of power chuck or spring collets have an unsolvable problem - temperature rising.

For instance, the surface temperature of a regular hydraulic cylinder may reach 60 deg or higher when operated at 5,000 rev/m if no cooler is installed.

This high temperature rising causes unpredictable thermal error of the spindle system and it gets worse as rev/min goes higher, making it hard to keep the work-part accurate no matter how accurate the spindle is.

To suppress this temperature rising, the machine builders have to invest more on oil cooling equipment, and the cost goes higher when the rev/min is required to be higher.

JAL636-PL is the first product of JAL series pneumatic cylinder.

Jato's pneumatic cylinder product line is to be expanded with two additional products to be released in quarter four 2008.

JAL846-D is designed to provide large clamping force with its double pistons, suitable for actuating 8in jaw type power chucks.

JAL525 will be able to provide high-speed operation up to 10,000 rev/m to work with lathes which use high-speed built-in-motor spindles.

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