Pneumatic Rotary Cylinder has 36 mm through-hole.

Press Release Summary:

Designed to actuate 5C or compatible spring collets whose tapered angle is less than 10°, Model JAL636-PL high-speed pneumatic rotary cylinder features less than 8°C temperature rising when running at 6,500 rpm to avoid thermal error of spindle system of CNC lathes. Powered by compressed air, compact unit measures 6.38 in. in dia, 5.67 in. in length and weighs 15.8 lb. With embedded elastic springs, it delivers pulling force of 2,057 lb when input air pressure is 100 psi.

Original Press Release:

6500RPM High-Speed Pneumatic Rotary Cylinder with 36mm Through-Hole, Specially Designed for Actuation of 5C Collets

A brand new open-center pneumatic cylinder was developed by JATO Precision for the high speed and high accuracy CNC lathes which use spring collets to clamp work-parts. JATO JAL636-PL pneumatic cylinder has extremely 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.

Today, more and 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 today 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 or higher when operated at 5000RPM if no cooler is installed. And this high temperature rising causes unpredictable thermal error of the spindle system and it gets worse as RPM 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 RPM is required to be higher.

JAL636-PL is powered by compressed air, meaning that the building cost of machines can be lowered by saving the purchase of a hydraulic tank and a hydraulic pump. The experiment shows the temperature rising of the cylinder body is less than 8 digresses Celsius when running at 6500RPM; this can further lower the cost since no cooler is needed. JAL636-PL comes with compact size and low mass, 162mm (6.38") in diameter, 144mm (5.67") in length, and 7.2kgs (15.8lbs) in weight. This pneumatic cylinder is designed to actuate 5C or compatible spring collets whose tapered angle is less than 10 degrees. We also enhance the pulling force of JAL636-PL to 935kgf (2057lbs) when input air pressure is 7kg/cm-sq (100psi) by embedded elastic springs. This also ensures the work-part will be clamped when the cylinder loses input air pressure suddenly.

JAL636-PL is the first product of JAL series pneumatic cylinder. There are several machine builders have already phased-in this brand new product on their lathes. JATO also is rewarded by Taiwan Industrial Development Bureau for the excellent design of this high performance pneumatic cylinder. To further strengthen our pneumatic cylinder product line, there are two new products which will be released at the Q4 of 2008. JAL846-D is design to provide very large clamping force with its double pistons, suitable for actuating 8" jaw type power chucks. And JAL525 will be able to provide super high speed operation up to 10000RPM to work with lathes which use high-speed built-in-motor spindles. The complete JAL series product line will be displayed in Taipei International Machine Tool Show on March, 2009. Meanwhile, JATO offers limited quantity of samples of JAL636-PL for customers to evaluate the outstanding performance of JAL636-PL. To learn more about JATO pneumatic cylinder, please contact us at or visit us at

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