Davey Posted June 29, 2006 Report Share Posted June 29, 2006 Does anyone have a handy chart for crystal size conversions (i.e. 140, 150, 160 -> mm), I have measured the crystal but do not have a model number to order from so need to convert 38.20mm to a standard size. Cheers Quote Link to comment Share on other sites More sharing options...
offshore Posted June 29, 2006 Report Share Posted June 29, 2006 Here is a chart I find handy. Offshore Sorry its on its side- prints better this way! I have some GS charts as well if they will help Quote Link to comment Share on other sites More sharing options...
Davey Posted June 29, 2006 Author Report Share Posted June 29, 2006 Thanks for that offshore, What the method of conversion on this chart? Quote Link to comment Share on other sites More sharing options...
offshore Posted June 29, 2006 Report Share Posted June 29, 2006 Davey, A lot of the old crystals are marked in " Lignes" ( French sizing I beleive) so the crystal has a sticker saying for instance... 12 7/16... this would be a 281 mm dia crystal, according to this chart. Another link is the PDF from GS, although this pertains to GS crystals specifically. http://www.gssupplies.com/GS_crystal_chart.pdf If you want to delve more in to GS crystals, spend some time on their site. http://www.gssupplies.com/watch-gauge.html I am still getting my head around the whole crystal thing... ( and have some ways to go yet) More great info can be found here- http://nawcc-mb.infopop.cc/groupee/forums/a/frm/f/6286058233 But please don't get on the NAWCC forum ( or any others ) and mention reps Good hunting, Let us all know what you finally find. Offshore Quote Link to comment Share on other sites More sharing options...
Davey Posted June 29, 2006 Author Report Share Posted June 29, 2006 281mm is 28.1 centimeters thats a big crystal! I assume these values need dividing by 10? I've not got the crystal so cant reference it, I can only measure the hole Quote Link to comment Share on other sites More sharing options...
offshore Posted June 29, 2006 Report Share Posted June 29, 2006 281mm is 28.1 centimeters thats a big crystal! I assume these values need dividing by 10? I've not got the crystal so cant reference it, I can only measure the hole Indeed... excuse us convicts from downunder, who have only recently converted to metrics ( about 20 years ago) Having been schooled in imperial, the old brain never thinks of the "real" size. Yes... that would indeed be 28.1mm' Offshore BTW, there is a formula for the size of crystal required, against the measured hole... I normally just go up one size ( most fit, but I break the odd one) Spend some time reading on the NAWCC site... valuable info. Quote Link to comment Share on other sites More sharing options...
Davey Posted June 29, 2006 Author Report Share Posted June 29, 2006 Ignore me I'm a bloody idiot! lol! Quote Link to comment Share on other sites More sharing options...
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