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molybdenum dysulphide dryspray is quite a good anti-galling agent.

Backward extrude your kingpin from cold forgeing wire. This should be approx 20% larger in diam than the kp. Heat treatment would destroy the tight grainflow and outer skin work hardening. A firm with cold headers could eat this job. Try SPS.

Cut the shelf into wide strips. Bend and reverse the long sides to form a "shelf slat." A typical slat could be say 30 inches long by 6 inches wide by 1/2 deep. These will not oil can but rivet,screw or bond in position to avoid twist.

A threaded fastener must not sustain either shear or bending loads,PERIOD!! To avoid this it is usually fairly easy to re-design a joint. A downloaded sketch coiuld be useful in this connection.

The rack and pinion steering on a car is sealed from dirt ingress. Why not take a trip down to your friendly car breakers. Their have a selection of types to try.

A torsion spring can rotate through many revolutions eg. the main spring of a mechanical watch. Try Redditch or Birmingham for springs. To compensate for "unwinding torsion fall" tapered rollers and fusee chain connected the spring output to the movement on early watches. They where called...

Window frame sealant guns use a very simple rod and lock plate to deliver linear movement and positional control. In your case a helical spring fitted around the rod and between the plates would provide the saparating force. The "unlock-reposition-lock"system would be controlled by a pressure...

CoryPad Sorry!! I tripped over my memory.Yes Nordlock or Disc-lock. Although a Whitworth form thread is self locking above the "jam line"but would require a threaded bush of the correct length. You are correct in your comments. However Class 1 locking I understand is still required on all...

Two piece will pre-stress the joint(thus resisting fatigue). Use tapered shaft and bore.(Enhanses pre-load and drive key may not be required. Welding will destroy any cold worked strength and weld decay could destroy the joint. Tap the shaft end and fit a min. 8.8 bolt with a spiraloc...

Replace the ring of 3/16 dia pins with bolts. The flange and wheel hub of a motor vehicle are clamped in this way. The wheel studs combine the functions of location,clamping and torque transmission(without the need for accuracy).

The first thread in the nut(bearing face end)sustains a stress level 231%(fine thrd),179%(coarse thrd) of applied load. This tapers back to a much lower level. Engaging less threads than in a typical nut raises first thrd stress level higher. Using a nut one grade lower than the bolt...

If the top and bottom plates are thick enough a single 8.8 hex hd bolt and nyloc nut through the middle. Shim each contact plane.This controls the membrane squeeze and allows wrenching to full tightening torque(the bolt). A roll pin in one corner will stop rotation. A tower nut(used on the RR...