<div class="full-description"> <p><strong>Material</strong></p> <ul> <li><strong>Nut Body:</strong> SS400 Steel (or equivalent).</li> <li><strong>Friction Ring:</strong> 301 Stainless Steel.</li> </ul> <p><strong>Perpendicularity of Bearing Surface:</strong> 0.07.</p> <p><strong>Thread Accuracy:</strong> ISO 6H (JIS Class 2).</p> <p><strong>Other Info.</strong></p> <ul> <li>A lead in chamfer equivalent to one thread pitch is required.</li> <li>The screw thread should be to ISO 965 (Class 6g tolerance).</li> <li>Lubricate the shaft before assembly or removal of the nut. With shafts of low hardness use a high performance lubricant.</li> <li>To maximise effectiveness, ensure there are at least two full threads beyond the friction ring.</li> <li>The squareness specified for the mating face is achieved with a tightening torque equivalent to x2 the prevailing torque.</li> <li>Do not use a high rotational speed impact wrench.</li> <li>Do not use the nuts on shafts with keyways.</li> <li>Do not screw in the nut from the friction ring side.</li> <li>Stop using the nut when excessive deformation or other fault is found in the friction ring and the clamp.</li> <li>For severe or unusual applications please contact our Technical department.</li> </ul> <p><strong>Construction & Function:</strong> FU-SS locknuts are one piece items where the locking function is performed by a spring peened into the top of the nut. In use, the spring bears on the flank of the shaft thread with force (<strong><em>P</em></strong>) generating reaction force (<strong><em>P*</em></strong>) in the screw threads with a resulting high friction torque (prevailing torque). The nut therefore remains locked in position.</p> <p><strong>Extras</strong></p> <p>FU-SC Type (High Carbon Steel S45C-H or equivalent), and<br />FU-SUS Type (304 Stainless Steel or equivalent) available, P.O.A.<br />FU-SC Type also available in larger sizes: FU21SC to FU30SC (M105 to M150), P.O.A.</p> <p>Socket Tools, P.O.A.</p> <p><strong>Features</strong></p> <ul> <li>Unique slim body design</li> <li>Secure locking without keyway and tab washer</li> <li>Improved shaft strength and balance</li> <li>Simple infinite adjustment</li> <li>Re-usable up to 100 times.</li> <li>Resists vibration and shock</li> <li>Equally effective for rotation in either direction even with rapid reversals</li> <li>One piece construction allows simpler, quicker assembly</li> </ul> </div>