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KNOBS & HANDLES 207

KNOBS & HANDLES 207
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Catalog excerpts

Adjustable Clamping Lever ERX Female NUMBER OF TIGHTENINGS KNOBS & HANDLES • Lever body Glass-fibre reinforced polyamide based (PA) technopolymer. Resistant to solvents, oils, greases and other chemical agents. • Colour Grey-black, matte finish. • Push button Technopolymer in Ergostyle colours, glossy finish. • Clamping element with retaining pin Glass-fibre reinforced technopolymer, black colour, with knurling on the protruding part to make initial tightening easier. AISI 302 stainless steel return spring. • Assembly Brass boss, tapped blind hole. Special executions on request (For sufficient quantities) Lever body in orange colour. Features and applications Particularly suitable when the lever turning angle is limited owing to lack of space. Compared to other types of adjustable handles with metal retaining screw this solution offers: / absolute electric insulation for the operator's hand / no visible steel parts subject to rust / more comfortable lever release. Stress resistance Adjustable handles are generally used for repetitive clamping operations sometimes with very high-frequency. Therefore, the stress resistance (i.e. the resistance to repeated tightening cycles) of the handle unit is particularly important and, especially, the strength of the toothed element which transmits the tightening force from the handle to the threaded element (boss or stud). In fact, the results of several laboratory tests, performed with a special instrument that simulates the most severe use conditions, have shown that e.g. the adjustable handle can withstand without yielding more than 100,000 tightening cycles, under the action of a force of 490 N (see graphic). Instructions of use For clamping, lift the lever to disengage the clamping device toothing and bring it back to start position. By releasing the lever, the return spring automatically engages the toothing. Ergonomy and design The slightly arched shape of the lever and the ergonomic terminal enlargement give the operator a comfortable and safe grip and make the design of the handle more elegant, while the thumb rests naturally on the push button.

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