I got to Force Fit two 3.5mm dia steel pins in the side of aboput 100 alluminium blocks 30.5mm X 30.5mm X 6mm thick, I've looked in the Machinery's Handbook but all they give you is stuff about steel- nothing about ally.
Stell and ally obviously have different co-efficinets of expansion. Is there any special techniques I should know about?
I was planning on drilling the holes undersize, reaming them a bit less undesize, heating the ally block, sticking the pins in and letting the assy cool... does that sound about right?
Looking for guidance! Thanks in advance!
Iain
[Edit] When it cools, will the steel pins warp the ally surface? cos I'm sticking an optical mirror on the block surface and that may be a problem.[/Edit]