Last fall, acquired a "new" 1988 Invicta Delta RT-31 10" scoring panel saw (3hp). This is my first and only real table saw. I got it for next-to-nothing at a liquidation auction, it appeared to have never been run (or fully assembled).
The arbor is short; set up for 20mm bore regular blades only. I intended to use a bushing on the 20mm arbor to run a 1" bored Forrest blade (have it). The saw originally came with an arbor extension - which is missing and no longer available from Delta. I originally wanted to have an arbor extension fabricated, but since I've got it apart - I'm wondering if I should just go for a whole new arbor - a regular 5/8" arbor.
First: Does anyone know if any of the metric table saws have arbor extensions that might fit my 20mm? This would be a simple solution.
If not:
I'm looking for the specific dimensions for a standard 5/8" arbor of sufficient width to run a 29/32" dado stack (or even 1" wide) and still be set up to run regular blades. I am planning to take my arbor specifications to a machine shop, and have it replicated exactly, except for the actual threaded end. What size threads do I go with? Where can I get the blade washer and nut for a 5/8 arrangement? (It's a RIGHT tilting saw.)
What metal should I use? How are arbors hardened/tempered? Is it a good idea to have it magnafluxed or tested for flaws otherwise? I expect that once I get a drawing of exactly what I need, SOMEONE can make what I am looking for, but I've got to know what I want before I go looking.
Thanks for your help
Jon Hamer, New to the 'Creek.