Nice set of instructions Brian. On Sun, 3 Apr 2022 at 06:58, Brian <[email protected]> wrote:
> The bottom of my machine is stainless steel, if yours is the same here Are > some tips you should abide by: > > > - Regular HSS drill bits will work, but ones designed for hard metals > are easier and more likely to work. For budget hard metal bits I find the > Milwaukee hard metal bits to be very good, they can be gotten at many > hardware or trade supply stores, and you will likely find a suitable size > for sale as a single bit saving the need to buy a pack. If you aren’t very > good at drilling, buy a second bit. > - If you do buy a set it is recommended to start with a small hole > then work up to the actual required size giving the metal, and the bit, > time to cool in between drilling. But since you shouldn’t need a very big > hole to mount a solid state relay, you can probably just go right to the > correct size. > - Stainless steel hardens if it gets hot, so lubricate the bit and the > metal where you are drilling from time to time, stop if it starts to smoke, > this is a good indication that things are getting too hot. Motor oil works > well, WD-40 works okay, but even a high temp cooking oil like vegetable oil > will work if you’re concerned about non food safe oil. A little bit of > smoke is normal, especially if it looks like it is actually coming from the > metal being removed. > - Make sure when drilling to apply moderate to high pressure, and keep > the drill speed low. Like really low. Like you’re gonna think “surely this > is too slow, slower than he meant”, and that’s probably about right.. I > promise with stainless steel, slow is actually fast. If the stainless gets > hot it will work harden, and then even the best bits will just get chewed > up trying to get through the work piece. > - Make sure when drilling you maintain good straight contact with the > work piece. Do you’re best to keep the drill bit perpendicular to the piece > being drilled, but most importantly once you start drilling, do your best > to keep the drill straight. The hard metal bits like to chip if you change > the angle while drilling. > - Before you begin drilling, use a screw or a center punch with a > good sharp point, and place the tip where you want the center of the hole > to be, give it one good whack with a good size hammer. This should give you > a little indent, this will make getting the hole started much easier, and > prevent the bit from walking. > - You’ll know you’re doing everything right when the full surface of > cutting edge of the drill bit makes contact with the work piece, you should > see strands of metal coming out, not small chips. If you do it all really > well you’ll get long continuous ribbons of stainless steel. > - When the drill bit breaks through to the other side it is VERY > likely to bind up, be ready for this, you can usually hear it about to > happen. The drill will jerk and try to twist when this happens. If you > start small and work you’re way up in size it reduces the severity of this. > - Placing/attaching a piece of wood behind the back of the work piece > will help to prevent the case from bending as you apply pressure, it will > also likely give you a cleaner exit hole, and reduce the chance of the > drill binding up. > > It really isn’t that hard to drill stainless, just a little care is > required for good results, don’t be dissuaded by all of my notes above, you > can totally do it. I am the operations/maintenance manager at a brewery so > I drill a lot of stainless. > > Don’t forget to apply thermal grease between the SSR and base of the > machine. Without it the SSR will fail prematurely, as it will generate > enough heat to cook itself. > > Best of luck! > Brian > > On Saturday, April 2, 2022 at 7:26:56 PM UTC-4 Andre wrote: > >> Hi group, I am in the process of PID kit installation into my Brewtus 2. >> You need to drill holes for static relay and I wonder if I need a special >> kind of drill bit for the thick steel bottom of the machine? Any issues and >> tips with that part? Not exactly sure what diameter too. Thanks. >> >> Sent from my iPhone >> > -- > You received this message because you are subscribed to the Google Groups > "Brewtus" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/brewtus/18729bf9-1e2a-4630-b671-8c74686b9cb1n%40googlegroups.com > <https://groups.google.com/d/msgid/brewtus/18729bf9-1e2a-4630-b671-8c74686b9cb1n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- Mike -- You received this message because you are subscribed to the Google Groups "Brewtus" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/brewtus/CAOUszRaggRW4KtPeT13dNOLVykBk07D7ZsSZ2qrx5yP7S%2Bx_4g%40mail.gmail.com.
