Recent content by cliveso

Thank you all for all your contribution! I've been sufficiently deterred by any kind of angled holes... I've gone for a rosette design, with five 5 mm vertical holes surrounding and overlapping the 11 mm hole. This is likely to cause a little more pressure loss but I suppose I'll have to...

It's for a musical instrument, some sort of organ. The pressure on the bottom side will be about 50 mm of water. The valve will be partly kept shut by the pressure, and partly by a light spring (20 g of force perhaps). As you can see, the whole setup is extremely light duty - far below most...

Hi Eric, thank you so much for your comments. I think it might be back to the drawing board for me... :(

Unfortunately not. The valve itself can't be bigger than 15 mm in diameter and I'd like to allow a 2 mm overlap of the seal, so the hole is 11 mm max. I have considered various arrangements with several vertical vent holes surrounding the 3 mm hole (making a rosette, effectively) and I'll keep...

Thank you, John. I think brad point bit + a little tear out will have to do, as I'll be making 125 of these!

Hello Newbie here. I would really appreciate some pointers for making the attached design. The design is an air valve, a bit like a valve of an internal combustion engine. The valve shaft slides in a 3mm hole in a 20mm solid hard wood board (beech, I think) and covers a 11mm hole on the...