[sandrewb]

Attachment 506406

Those are the specs for 2 different parts. Thanks for helping out!

[ToolHIT]

Sounds great! Here are links to the indexable 90 Degree ID Chamfer Tool we would recommend to do the 90 degree threads. The only issue I'm seeing is the indexable system has a .008" flat and the print calls out a R.0157" Max, would the flat be ok? Also, I see it is a 5/32" pitch but with the .0157" Radius the .140" width of the insert should work.

.500" Min Bore x .140" Width x 90 Degree ID Chamfer Insert:
https://www.toolhit.com/products/t10c90blu

1/2" Shank x 1" Reach x 2.800" OAL Steel Coolant Thru Holder (also available in 5/8" Steel and Carbide is available as well for deeper bores):
https://www.toolhit.com/products/st0500l10e10

Not the easiest application. A Modified Top Notch could still be a good option, especially at the 1.320" Bore Diameter.

Hopefully this helps!

Mike