KOSTYRKA® System slotted clamping sleeves are proven elements in the construction of machines and fixtures, and been used in more than 200,000 applications since 1969. Clamping at great speed, they prevent the slipping or turning of supporting elements, bolts, spindles, sleeves, collar plates, press stands, piston rods, turntables...

Method of Operation

An oil pressure is applied between seals at the sleeve jacket, and this is converted, without loss, into radial clamping force.
KOSTYRKA® clamping sleeves work with no part influences: the part to be clamped is neither axially pushed nor twisted as the clamping occurs.

When the oil pressure is completely removed the sleeves spring back elastically to their starting position, releasing the part once again. It is essential to avoid residual pressure. Although frictional force transmission is involved: the surfaces of the parts to be clamped are not damaged.

In spite of high wall strength, the KOSTYRKA® clamping sleeves are very elastic. This is due to the fact that individual blades are bent, rather than a closed cylinder jacket having to be compressed.

Clamping sleeves without flange rings can only transmit forces in a longitudinal direction. Rotational forces, such as occur with turntables, require clamping sleeves with integrated flange rings.

Operating Conditions

All forms of KOSTYRKA® clamping sleeves are, without exception,designed for operation by pressurized oil. Although the sleeves are activated by quite low hydraulic pressures, compressed air actuation is to be avoided. KOSTYRKA®clamping sleeves can be operated by any liquid medium against which the main body of the sleeve, plastic jacket and seals are chemically and thermally resistant.

The plastic jackets and the seals of the standard versions of KOSTYRKA® clamping sleeves are resistant to mineral oils, brake fluid and low-flammability hydraulic fluids, up to a temperature of 100°C (212°F). For higher operating temperatures we ask You to contact us.

The working pressure of KOSTYRKA® clamping sleeves is in general between 50–450 bar (700–6,500 psi.). For working pressures outside this range, we ask you to contact us.

General Tolerances

All forms and sizes of KOSTYRKA® clamping sleeves are, in general, toleranced as follows: outer diameter
D = g6, inner diameter d = H7,
Length L* = -0,1 mm (-0.004 in.).
Special tolerances are possible.

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