Ok I am back.
So here is the story of KinkyMonkey's Outstanding Buttplug Device MarkII
Since I really enjoy a glass dildo for the smooth entry and temp control, I decided I wanted to make a solid style buttplug. I also wanted to make it to where I could change plugs, shaft thickness, and even shaft length without making a whole new toy.
First I started with the base because I knew the base was the key. I wanted a round or rounded steel bar for my base so it would nestle between my cheeks like a steel g-string. Rummaging through my toolbox I found the bar from a slide hammer that i'd saved after upgrading to a longer one. It was 1/2" in diameter and had a 1" round bulb that serves as a stop for the hammer. Perfect! I cut the rod down on each side of the bulb, leaving 1.75" on what would be the perianum side and 1" one the spine side. I did this so that I would have enough base to keep the toy from slipping all in but the spine side wouldn't poke unusual bumps in my pants while I lean into an engine bay.
(BTW this whole thing was designed while I was bored at work with other mechanics scratching their heads at my work clueless)
Next, I drilled and tapped a hole on the bulb to accept a threaded rod (3/8"). I put the hole at an angle to that the installed rod would sit at a cant about 15 degrees from perpendicular leaning toward the spine side. I did this thinking the toy would sit better and not push against my perianum while standing and walking. I am glad I did because all I have is a gentle push while walking. Had I gone full perpendicular my poor peri would hate me.
Then I made a shaft (first of many) to slip over the threaded rod. I used a chrome deepwell socket ground down to 1.5 inches long and then polished to remove any burrs. Using this shaft I needed a 2.25" threaded rod so I had enough to thread both ends.
For the actual plug I chose a round ball knob off another tool I had laying around (an accelorator pedal depressor). The knob is 35mm and was already tapped for 3/8" threads. I polished some manufactoring flash off the knob with 400 grit sandpaper and then assembled the toy (to this point no coworker saw all the objects together and deigning to keep it that way I went to the bathroom for this part)
The end result was phenominal! I now have a steel toy that I can change to my liking. I am wearing the original design as I type this and have been all day. The base is very comfortable and with the 1.5" shaft length the ball is just deep enough to stay snug.
The 15mm socket had an outside diameter of .75" which is a great feeling for walking around. I made a thinner shaft to put rubber sleeves on for short term use (think studded band). I want to make a thicker shaft but am waiting until I upgrade ball size. I think. Want to keep the ball to shaft diameter ratio the same to avoid dropping the ball (hehe).
For my next upgrade I'm already eying the 40mm ball on my Logictek trackball mouse. I think a 1" shaft diameter would mate well with it. I just happen to have an 11/16" socket with that diameter...
I'd take pics and show them but I guess I don't have that privilege yet. Sorry folks!