I too do not like to grease My King Pins while on the road.
Well I just must be different. As well, I am half a world away from Colin. I do use Hard Chrome King Pins. However: I buy it in 22' lengths (cut to KP lengths)at a local "Tube Supply". But the Chrome Rod I buy has been "Induction Hardened" under the thin coat of chrome. This hardening makes a better base for the chrome I am told. It also makes the chrome surface too hard to drill even with a cobalt drill. I know I tried. However I do not use a bronze bush. I have sourced a product called "Vesconite HiLube". It is used for bushes in the mining industry of South Africa. I have a Metal Lathe so fabricating this is easy for Me. I do not sell this setup as I do not carry "Product Liability". In the US one must be insured to even breathe it seems. After the initial greasing I drove My +8 for 2 years without greasing. I then took the stub axle off and had a look. Little wear and still plenty of grease. I have used this setup for about 10 years and a bit over 50,000 miles with no problems. Recently inspected them and there was some wear on the chrome. Worn thru the chrome in the high wear area. Turned KP's 180 degrees and re installed. I did use grease seals top and bottom. Wear was on bottom as usual. I am a bit suspicious that plastic bushes pick up grit and hold it. Regular greasing would help flush the grit out. Of course grease seals would keep grit in. Not a perfect solution.
The other system I am using on My +4-4Str is an earlier attempt at not greasing while on the road. Still hard chrome KP's but not induction hardened. I drilled a 3/16" grease galley down to the stub axle. Then drilled a 1/8" hole across to let the grease out. Connected this to a "Alemite" grease gun mounted under the dash next to the steering column. I now can sit in the drivers seat and pump grease into the stub axle by twisting the handle of the grease gun. This system has been in place for about 14 years and works well. BTW: I used Devol bushes with no issues.
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