mrmoo

As requested in a recent message see attached cad files from the deep distance past.

SCOPEMOUNT.zip

HOW ERER IS ON THIS THIN i wll kill them

HOW ERER IS ON THIS THIN i wll kill them

I WILL KILL YOU EREYBODY

Finished files > Linky

I use AutoCad LT, not cheap but I've been using it since I was a Kid. There are hundreds of free CAD programs. Have a look at FreeCAD or Google Sketchup

I've left a hidden view on the RHS plate so you can see how close the holes are. If you're happy there is enough clearance etc and dims are correct. I'll post the finished drawing without the hidden detail. Forgive my ignorance, I haven't seen an assembled version. How are you fixing the adapter to the plate? From the adapter - 6 off 8mm holes: On the plate - 8mm right through or smaller or M8 tapped?

Material, I've put gauge plate. There's two ways to get the plates made. The first is from a round billet. They chop saw a length, then turn the plate down. I wouldn't do that myself in-case the plates warped from strain relief. The other is ground flat stock (gauge plate) the machinist would mill/turn a diameter on the flat plate. Much less chance of the plates moving. Up to you, I'll change the note. Finishing, this is going to be outside right? So powder coated, painted or thought about stainless steel?

Wow MrMoo, that is fantastic. Nice job indeed. I now see what you meant by the depths and the centers. makes much more sense to me, even if I am just your regular run of the mill lay person. :-)

Thanks again mate, hope you don't mind if I download that and throw in my file.

Cheers

No problem, they're all yours. If you give me the missing pitch circle diameters for the plates I can do those for you as well, won't take long to do. The slotted bit, 30mm long, is that 30mm in total or 30mm centre to centre?

Just for a giggle I redrew it to CAD so you can see what it looks like to scale. Follow link for the DWG and PDF versions.

Thought that would be it, but I did wonder. Cross section is well out of scale, lol makes me want to draw it. Don't worry, I'm sure the machinist has all he/she needs. Have you tried using a CAD program to draft it? There's loads of free ones around. I can't see anything dimension wise that's obviously missing, other than the plates could do with PCD's for the 12mm holes.

If you don't mind a tip or two. Try to use centrelines to tie it all together. Especially on hole centres, for instance the note for the 6 x 8m holes. The machinist is going to place them mid way between the two dimensions 140 & 114 , which may or may not be what you wanted. So it could read "6 off, Ø8mm through holes equispaced on 127mm PCD" The other thing is avoid cumulative dimensions like the stepping of the bores. Use a total depth from the top surface for each bore. The guy with the lathe will face off the metal and wind in the cutter from zero, it's just more accurate and less prone to mistakes. Umm what else, ah the thread I'm assuming you want 30mm of actual thread so "1 off, M12x30 (min) on 87.0 PCD" as he'll need to drill in a bit further for a bottom tap in a blind hole. See I said it would be boring!

Btw, did you say what the material was?

I'm a Mechanical Engineer and started as a draughtsman. So don't want to point out all the technical drawing bits as it would very boring, but I think that's a fantastic effort. One thing on the plan view, you show a 29.9mm diameter with no corresponding c'bore depth on the sectional view?

My first deep sky photo, Orion Nebula, through an old canon 500mm f4.5 with 40d 2 mins at iso400 Jan 2011. I was so shocked that i had something when i looked at the display - magic!

That look pretty good to me.