u/Guns_and_Timmies

Hello community:

I'm having a intricate piece of Stainless Steel 3D printed. I need to put various holes into in with a drill press. The total thickness of material is 2mm.

Now I can have "holes printed" into the piece for alignment or centering, I just want to drill the final actual shape with a proper drill.

Last time I did this I put a 0.5mm pilot hole through the material, but because it was so little it wasn't truly round and didn't help much.

The hole needs to be 9mm in diameter, so quite large.

Now my question: How should I design the "pilot" for the ideal centering of the drill ? Should I make the hole 7mm with a bevel so I only need to drill out 1mm all around the hole ? Should I make the hole around 3mm and use a center drill ? Spotting drill ?

There are so many options here, please help!

Got a question for the community:

I needed to drill a hole into a metal frame, and the hole needs to sit flush with the backwall, as shown in figure 1.

Figure 2 shows how I drilled it. It wasnt aligned perfectly and I took out a portion of the backwall with the drill. The metal is 2mm total thickness and with my depth gauge measured depth of my misalignment channel is 0.2mm.

Question 1: Whats the best material to patch 0.2mm of depth ? (JB weld regular, JB weld clear thin, soldering tin ?, other??) It does need to withstand heat but not too much abrasion.

Question 2: How should I enlarge the hole as cleanly as possible to get my .35 inch metal rod to clear once the backwall is filled in ?

In essence I need to close a small portion of the hole and then open a small portion on the other side.

Thank you!

How to: Centering my drill perfectly?

Question: Patch and Sand Stainless Steel