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Clamping Sleeves Engineered to Support Machine Tool Workholding

With the hydraulic-actuated Kostyrka clamping sleeve from Euro-Tech, the part being clamped can withstand a holding force in excess of 22,000 ft-lb with only negligible axial movement and no surface damage.

Posted: June 23, 2016

Booth W-2453: Kostyrka German-engineered clamping sleeves from Euro-Tech use flexible metal plastic composite bushes in housings to surround the part and clamp it by applying oil pressure to the sleeve jacket and converting that pressure into a radially acting clamping force that does not damage the surfaces of the clamped parts. (view one)

In Booth W-2453, Euro-Tech Corporation (Menomonee Falls, WI) will spotlight Kostyrka German-engineered clamping sleeve technology that is based on the idea of creating a shaft-hub joint actuated by hydraulic pressure to efficiently support the workholding function of modern machine tools. Flexible metal plastic composite bushes in housings surround the part and clamp it by applying oil pressure to the sleeve jacket. The oil pressure is converted loss-free and reaction-free into a radially acting clamping force. The sleeves spring back to their starting position after the oil pressure is removed and the clamped part is released. The surfaces of the clamped parts are not damaged with this adherence-actuated form of power transmission.

Precision and longevity of the Kostyrka clamping sleeves are a prerequisite for smooth, continuous manufacturing. Shops can depend on reliable operation day after day and year after year. The part being clamped can withstand a holding force in excess of 22,000 ft-lb with only negligible axial movement. The clamping sleeve’s main body consists of a copper/tin, copper/tin/zinc or a copper aluminum alloy. Sleeves subjected to high stress may be made from case hardened steel or spring steel. The plastic jacket with a double-sided O-ring/back-up ring combination is manufactured from PA or POM and is resistant to mineral oils, brake fluid and low-flammability hydraulic fluids (up to 100 deg C). The working pressure is 50 bar to 450 bar (700 psi to 6,500 psi). General tolerances are outer diameter D = g6, inner diameter d = H7, Length L = -0.1 mm (-0.004 in). Seals of the sleeves are resistant in the temperature range of -30 deg C to +110 deg C

Special versions are for higher operating temperatures and working pressures outside the standard of 50 bar to 450 bar (700 psi to 6,500 psi) range. Special tolerances are possible. For high temperature applications sleeve seals will use VITON® O-rings.

Euro-Tech Corporation, N48 W14170 Hampton Avenue, Menomonee Falls, WI 53051, 262-781-6777, Fax: 262-781-2822, www.eurotechcorp.com.