I saw a few for sale, but what is the correct size for a 1956 F100?

Thanks

 

I know a little about machining and less about working on king pins, but since nobody else has stepped up, here I go...

Could you use an adjustable reamer? Find out what the clearance over the pins you are installing should be and ream to that size. You could use a telescope gage and a micrometer to see if you are to size.

Cal

 

Thanks for answering Cal, an adjustable one would work, and I have the Ford part numbers for the right one, but that cant be cheap... I was just trying to find an aftermarket one used and wondered what the correct size is. Guess Ill order the pins and bushings and measure!

I lived in Tucson for a while, wild town!

 

Totally off topic: You changed avatars on me and I had no idea who you were. LOL

 

packrat56,

I am a machinist and although I've never done king pin bushings, although I will in the near future hopefully, here is what I can tell you as far as general info goes:

most applications that have bushings have a .001 to .0025 clearence between shaft OD and bushing ID. Don't know for sure that this is true for king pins but I would think that they would fall under the general shaft and bushing catagory.

Be careful with adjustable reamers.Again this is speaking from a general knowledge and not specific to king pin applications. It has been my experience that adjustable reamers will ream a little on the low side but be careful not to go to far with your adjustment because a little to much is still to much.

My advice is get a piece of scrap material that is the same or similar to your bushing material and try a hole in that first. That way if you make a mistake you don't ruin a bushing, you ruin a piece of scrap material. I would get enough scrap material to try this a few times.

First, drill a hole in the scrap piece that is about .015 smaller than the size you plan to ream. Then adjust your reamer to make the size hole you want. Now you know how your reamer will react to the changes and you know what the reaming operation feels like.

Again, this is general knowledge from an experienced machinist. This is not specific to king pin applications.

 

According to the 56 ford truck shop manual the bushing is 0.861 ID and the spindle is 0.859 OD
The FOMOCO part# for the reamer is: T53T-3110-A

 

Thanks everyone! "bushing is 0.861 ID and the spindle is 0.859 OD"

BrianB sorry about that pic change, thought Id try a B&W from the school darkroom...

 

You can buy a 7/8" (.875") reamer for about $16. It costs around $10 to sharpen a reamer, so maybe you can find a tool & cutter grinding shop that will grind a 7/8" reamer down to .861 for $10 to $20. They probably have dull reamers around that they could sell you cheap for the blank.

I don't know if you have access to a lathe and mill, but you could also make a D-bit reamer out of 7/8" drill rod.

Cal

 

packrat56 I sent u a PM!