(76/154) 2020-06-13_20-30-51.jpg
Only positive effect of the Lock-down
75: Master Kludge - pressure switch to enable - silver bit fuzzy forground - TI-button power supply right edge - TIG-button control
74: Radius form 2-points on a curve
73: Drill point depth
72: 2020-05-27_13-51-33.jpg
71: 2020-05-27_13-50-53.jpg
70: tapers on the lathe
69: Countersink depth A=x-y/2tan(z)
68: Measuring small grove in small bore.
67: Machining trig notes
66: 2020-05-22_13-34-07.png
77: Still in business https://www.buschprecision.com/Busch-Precision/Contact/About-Us/Our-History.htm Close to the now #1022 18" x 15" x 4" $3-4K new (as of ⎄2020) Series Surface Plates. Grooves are 2mmW x 2.5mm”D on 13.5 mm centers.
78: Ballplan microscope flashlight light source adapter
79: Ballplan microscope flashlight light source adapter
80: 2020-07-01_21-51-10.jpg
81: 2020-07-01_22-01-41.jpg
82: 2020-07-01_22-41-42.jpg
83: 2020-07-03_17-07-05.jpg
84: Carbon content vs strength, hardness and ductility
85: iron carbon phase diagram. Good one - better than photos.
86: 2020-07-04_21-20-11.jpg
