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Old 01-05-2018, 11:33 AM
Stefan Buda
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Stefan Buda is offline
 
Join Date: Jul 2013
Location: Melbourne, VIC
Posts: 823
I ordered some Borofloat blanks from Germany and looks like I won't be getting them until July. I wanted to make a start on the primary before then, so I dug up an old school Pyrex blank from my collection and spent several days machining it down to 25mm thickness. Actually I overshot the mark by half a millimetre.
I just have to generate the front radius and I can start pushing glass. I already have a thick Pyrex tool that I made for re-grinding an ODK10 primary.
The radius difference is very small and I will fine tune it with a metal ring tool.
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