Source of miniature "o" rings

[popgun pete]

Although intended for watches these "O" rings may prove useful and the cost is very low.

Mini Small Rubber Washer O-Ring Watch Crown Waterproof Seals Repair Tools

compra US$8.14, compra Mini Small Rubber Washer O-Ring Watch Crown Waterproof Seals Repair Tools de alta calidad en newfrog.com. Ahorre a lo grande con varios descuentos y envío gratis

www.newfrog.com

 

[Diving Gecko]

Good find but... in practice I have found that even rings with 1.0mm section width start being very fickle to work with. They get nicked and extrude very easily. These days, I feel like 1.5mm is a good size if one wants to go small. That's what I have in many places now such as the major seals on my 3D printed nose cones and bulkheads, my triggers, the Evo Mirage pumping barrel, check valves and the seals on the barrels themselves. I guess the majority of the seals are 1.5mm in that gun.
Perhaps I could go to 1.2mm for certain things but based on my experiences with 1mm rings I am happy to stay with 1.5mm for now.

Also, bigger section widths also means that machining tolerances of the o-ring grooves and bores can be a bit less critical. While I can hold surprisingly tight tolerances, I think having a bit more leeway is a good thing for homemade parts.

That said, I have a dive computer in pieces that I am considering servicing myself - I wouldn't be surprised if the button seals are covered by what's in that box.

 

[popgun pete]

Many years ago I needed an "O" ring for the inlet valve on one of my pneumatic guns and I was in a small coastal town where I went to a local bearing service center which was just a shop counter and sold "O" rings as well. That one tiny "O" ring cost me 2 dollars and the gun new had cost me 30 dollars only a year or so before. Now a dollar was worth a lot more back then and ever since I have looked for better deals when they become available. This whole box set is only 8 dollars!