I was able to complete my axle fixture tonight.
There are several ways I could have cut the V grooves in the upper halves. The easiest probably would have been to cut along the scribe lines with the vertical bandsaw and then touch up on the belt sander but I wanted to machine the grooves. Besides my mill was already a mess so I may as well add to the chips.
On the mill I could have clamped the plates at a 45-degree angle upright in the vise and cut the V from the end but I didn’t have an end mill long enough to reach the bottom of the V, plus there would have been some deflection in the end mill. I also could have clamped it to my rotary table and indicated in on either the X or Y axis, milled to the bottom then turned the table 90-degrees and milled to the other line. I opted to clamp it directly to the table atop my 1-2-3 blocks and indicate in on one axis and cut using the X and Y travel.
Measurements transferred to the plates. You can see my center punch marks. My plan was to drill a 3/8” hole and have that radius at the bottom of the groove. To accomplish that I offset the hole half of the 3/8” and center punched for drilling.
After snugging the clamps I used my combination square as the reference for indicating in on the X axis.
After using my wiggler to find the center punch I zeroed both X and Y on the DRO. I then moved off of the cut lines by .100” and made the rough cuts before switching over to a 4-flute end mill and snuck up on the measurements.
Final pass completed.
One down one to go.
Mocked up with a smaller diameter tube. This should be the closest the upper and lower clamps should come to one another and still has 3/8” clearance with plenty of surface area contact for secure clamping. This would be even smaller than a Dana 30 or 44 which I will more than likely be working with.
Mocked up with probably the largest tube diameter I will come across. This would be indicative of a Dana 70, 80 or even an AAM or GM 14-bolt axle.
Approximately where they will reside on my fabrication table when in use.
Thanks for looking.