The Ford Barn

Rich in Tucson · 03-30-2019, 10:31 PM

I have them honed by a machinist whose primary job is building racing engines. With the bushings supplied today (I always get them from the same source, a Model A vendor) he has never had to ream before honing, and then depending on the spindle the honing is often very light; some spindles are rejected for better ones. He aims for the .001-.0015 clearance but they may end up at .002-.003. The bigger issue is that new king pins are rarely machined correctly, they are often tapered or banana shaped. I supply him the bearing on the king pin for fitting. He does the best with what I give him, and NOS or NORS kits present fewer problems.

03-30-2019, 10:31 PM	#9
Rich in Tucson Senior Member Join Date: May 2010 Location: Tucson, Arizona Posts: 374	Re: Reaming Bushings I have them honed by a machinist whose primary job is building racing engines. With the bushings supplied today (I always get them from the same source, a Model A vendor) he has never had to ream before honing, and then depending on the spindle the honing is often very light; some spindles are rejected for better ones. He aims for the .001-.0015 clearance but they may end up at .002-.003. The bigger issue is that new king pins are rarely machined correctly, they are often tapered or banana shaped. I supply him the bearing on the king pin for fitting. He does the best with what I give him, and NOS or NORS kits present fewer problems.