JW Winco has upgraded its hand knob nuts, star knob screws and adjustable hand levers to increase clamping force for applications that require repeated manual fastening. The products use a ball-bearing clamping surface designed to double clamping force while helping protect surfaces from damage.
Many industrial and engineering applications require parts and jigs to be repeatedly slid over slots or repositioned using threaded holes. When a secure hold and quick clamping are priorities, JW Winco hand knob nuts, star knob screws and adjustable hand levers with increased clamping force can be used.
These products share a hardened clamping surface with a ball bearing and base. With typical screws and nuts, about half the tightening torque is lost to under-head friction. In this design, more torque is transferred to the thread, increasing axial clamping force by hand without tools. Because the clamping surface does not rotate during clamping, the part surface is less likely to be marked.
The hand knob with increased clamping force GN 6335.9 of black, impact-resistant plastic guarantees ergonomic transmission of force from the user’s hand to the underlying steel parts with the axial bearing and threaded bushing. It is available in four diameters between 40 and 80 mm with threads from M6 to M12.
The quick release star knob screw GN 6336.9 combines the advantages of clamping and releasing in less than a full turn with those of increased clamping force. With threaded segments that move at the push of a button, it allows the screw shaft to be inserted easily into the hole and tightened with no more than one turn by hand. The screw is available in M8, M10 and M12, each with three typical shaft lengths.
Adjustable hand levers with increased clamping force GN 300.4 are available as standard with internal or external thread. Internal serration allows users to always select the best gripping position. The lever handles of zinc die casting are either chrome-plated or powder coated in five color variants. The axial bearing and other mechanical elements below the lever are made of nitride or blackened steel. If corrosion resistance is required, the GN 300.7 offers the same design, with the lever, screw and clamping elements made of stainless steel.
JW Winco
www.jwwinco.mx
Filed Under: Knobs • handles
