Which Heald ?
I wrote this out once before but ...
Set your stops to traverse maybe 1/4 of the wheel past the hole on both in and out. Traverse is not extremely fast, just a nice calm speed, like a slow wave bye-bye to the great-aunt after she made you eat that damned fruitcake again. Maybe a liitle slower. Andante.
I'm not used to this small a hole, use the fastest red head you've got and I bet it'll still be too slow, so go for a harder wheel, it will act softer from running too slow.
Vitreous is fine, cbn is too expensive.
Wheel and work rotate against each other. Usually wheel away from you, work towards you, grind on the back side.
I usually like to go about 2/3 bore size with the wheel, get more coolant in there but 80% sure, why not.
You need coolant, it keeps the temp down and washes the swarf out.
Make sure to use a blotter, and you know you have to dress every new wheel before you use it, right ? You can just run your finger over it after you dress, you can feel any non-roundness in the wheel that way, plus you can rob a bank that night, no fingerprints
If I was going on a date I'd always smooth off the fingers on a wheel, that way you don't get yelled at for running her stockings. Machinist fingers
For so few parts I'd just manually drive it, no point in setting up all the auto stuff -- pull the wheel back clear of the diameter then bring it into the hole, now touch off while the table is reciprocating, set the amount to go on the handwheel (you had to measure the part first), kick it in one notch (.0002") at the end of each out stroke, or with such a small hole you may need to let it reciprocate twice between infeeds, grind until you are maybe a half thou away from finish on this small a hole (bigger hole I'd do a thou or even two), retract the wheel from the hole, dress, come back in, touch off, reset the handwheel to account for what you dressed, let it spark out or just reciprocate a few times, you better not be seeing sparks anyhow, retract, measure, set the handwheel for how much there really is to go, then grind to finish size. You'll want to dress for each part.
Retract is just pulling the table out, don't move the infeed of the wheel or you'll never know where you are. You can set a stop for the feed control lever so it will come back to the same place every time between rapids.
On bigger holes I always wanted .010" grind stock, heat treat always makes the parts go wonky and for the stuff I normally did, they wouldn't clean up until you took out three or four thou at least. But those were bigger, inch and a half or larger.
Still, it's easier to grind out more than to find the deposit tool and put material back on.
You can mess with the workhead speed to change how hard or soft the wheel grinds - faster makes the wheel softer - but I don't think you're going to be able to pull much info from the charts, cuz unless you have a very high-speed red head, your wheel speeds are going to be way slow. So just try then modify. I bet you'll have to run the workhead slower than the numbers say.
It should make a nice whoosh whoosh whoosh noise, that's the best way to tell.
After the first few parts it'll be fun. Healds are cool. Just do everything
exactly the same on each part, they respond to that.