Hi all
Got started on the coolant pump. The plans called for using a submersible electric pump in the reservoir, didn't much care for that, so after asking a few questions decided to go with Jerry Howell's magnetic drive pump. Of course, I can't just follow the plans, so there have been a few modifications already...

I didn't have an appropriate piece of round stock, so soldered a temporary spigot on a chunk of my secret stash of 1/2" plate brass, and then turned the spigot so it would run true

Turned it round, reversed it in the chuck and machined off the spigot in the process of hollowing out the piece, then silver brazed it to a piece of flat stock..
(and, if you look closely, just behind the firebrick you can see the first one, stuffed it up drilling the bolt circle...

.)

Jerry's plans call for a delrin piece threaded into the brass body to hold the impeller in place. I still don't have a thread-cutting lathe, so left the hole in the pump body un-threaded, will also not thread the delrin insert, and will hold it together with this clamping ring

Next up is the impeller, turned the blank with a shoulder on the bottom to facilitate holding it on the rotary table with a strap of spare ali, off-set it to mill the slots, re-centred and drilled the holes for the magnets, after this re-chucked it in the lathe and turned off the shoulder
and here is the delrin piece ready for parting off. First time I've machined this stuff, boy it sure cuts easily with a nice finish. Nice soft non-cut-causing swarf, too


Made the pulley for the thing, and then added it to the pile of parts that don't fit, so next up will be another one.... and inlet & outlet bits.
Cheers, Joe