Hydraulic Nut - Shim - The shim type nut is the most accurate type of hydraulic nut. This nut has a flanged piston. A shim gap is created between the body and the piston when the nut is pressurised. The size of the shim gap is a combination of the compression of the bolted joint and gasket, if fitted, plus the elongation of the bolt. The nut is pressurised until the hydraulic jack develops the desired pre-load. The shim gap is measured, and shims are made to fit. The pressure is increased slightly to allow the shims to be inserted. The pressure is released, and the preload is transferred onto the shims. A very high percentage of the load is retained in the bolt. Tensioner nuts are available in various types and in a wide range of sizes. The range from M24 to M200, nuts are available in two types as standard and slim types of nuts are made from alloy steel to achieve required clamping load to suit the application needs.
Hydraulic Nut Collar - This nut has an internally and externally threaded piston. The external thread is fitted with a load retaining, locking collar. A gap is created between the nut body and the locking collar when pressure is applied. The gap is a combination of the compression of the bolted joint and gasket, if fitted, plus the elongation of the bolt. The nut is pressurised until the hydraulic jack develops more than the desired pre-load. The locking collar is tightened. The pressure is released, and the pre-load is transferred to the locking collar threads. Due to settling of the collar threads some of the pre-load is lost. This is more critical in short bolt applications where the bolt elongation may be small. The pre-load loss on transfer to the collar becomes less significant on long grip length bolts. Tensioner nuts are available in various types and in a wide range of sizes. The range from M24 to M200, nuts are available in two types as standard and slim types nuts are made from alloy steel to achieve required clamping load to suit the application needs.
Higher preload, Tightening in pure tension. ·
A single worker can work for massive assemblies. ·
Preload prevent bolts from loosening by vibration. ·
Better bolted joint, generating higher preload. ·
Custom solutions supplied to your application. ·
Eliminate dangerous pinch points. ·
Easier to install in limited space. ·
Accurate tensioning, even loading. ·
Hydraulic active only during loading. ·
Accurate preloads prevent joint loosening. ·
Tightening in pure tension eliminates thread galling. ·
Quick and easy dismantling reduces downtime.
All manufactured components of alloy steel.
Manufactured component raw material rolled bars, rolled sheet, casting, forging as required.
Components are treated for wear and rust prevention.
All raw material made available from indigenous sources.
All bought out components from standard manufacturers.
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