Hdvseatek O-rings identified

[DandyDon]

Hdvseatek PLB dive canisters are great for around $100 USD delivered, depending on which web site you order from. Just lube the o-ring with silicone grease for every trip, more often if your trips last over a week, and replace the o-rings yearly. My problem has been finding replacements. I ordered a couple from the supplier in Australia, and he sent them okay - but surely we can find them here for less than $6 each?!

Here is the label sent to me by Hdvseatek. I have no idea what all of that means or how to shop for the same thing. Anyone...??

Edit: We had an ongoing disagreement as to the answer and which o-ring to order. This seems settled now, as the o-rings desired are 75 mm ID, and JohnnyC has corrected his post #2 to include the corrected link. McMaster-Carr

My email to the company that included the same photo was quickly answered with a confirming link to the same model 1302N689.

 

[JohnnyC]

Hdvseatek PLB dive canisters are great for around $100 USD delivered, depending on which web site you order from. Just lube the o-ring with silicone grease for every trip, more often if your trips last over a week, and replace the o-rings yearly. My problem has been finding replacements. I ordered a couple from the supplier in Australia, and he sent them okay - but surely we can find them here for less than $6?!

Here is the label. I have no idea what all of that means or how to shop for the same thing. Anyone...??

View attachment 540971

Here's the (correct) McMaster link for the same o-ring. 70 Durometer is its hardness. 75mm is it's inner diameter. 4mm is the thickness of the o-ring (so 83mm OD). $7 for 10 of them.

McMaster-Carr

 

[outofofficebrb]

Brilliant. I just received the same email response from him.

Thanks!

 

[michael-fisch]

Last edited on 19. Sept
No No No! the 75 is the inner diameter of the O-ring, instead of the OD.

Michael

 

[DandyDon]

Entire spacecraft have been lost over such. It seems to make sense that the ID would be the factor to require along with thickness, but I'm only guessing. So, I hope we can settle this before anyone orders a bunch of o-rings that won't fit.

 

[outofofficebrb]

No No No! the 75 is the inner diameter of the O-ring, instead of the OD.

Michael

That’s a big difference. That could be a flood vs no flood. I have some time before I need a replacement o-ring. Which are we 100% sure about? It’s a hung jury so far. my understanding is that it’s a metric o-ring so it’s ID x CS but I could be wrong which is also likely.

 

[kelemvor]

Heh.. good thing I finished the thread before ordering o-rings . Would have been $10 down the tubes.

 

[michael-fisch]

wikipedia agrees with me:
Metric O-rings are usually defined by the internal dimension x the cross section. Typical part number for a metric O-ring - ID x CS [material & shore hardness] 2x1N70 = defines this O-ring as 2mm id with 1mm cross section made from Nitrile rubber which is 70Sh

Michael

 

[JohnnyC]

I could have sworn I sorted by ID and just copied the data. Good catch!

Updated the link in the first post. Here it is again:

McMaster-Carr

 

[DandyDon]

Heh.. good thing I finished the thread before ordering o-rings . Would have been $10 down the tubes.

Yep. I have edited post #1 with caution about ordering until we settle this disagreement. I will attempt to edit again when we resolve this.

That’s a big difference. That could be a flood vs no flood. I have some time before I need a replacement o-ring. Which are we 100% sure about? It’s a hung jury so far. my understanding is that it’s a metric o-ring so it’s ID x CS but I could be wrong which is also likely.

Well, if you ordered the 67 mm o-rings to fit a canister with 75 mm OD, I don't think it'd fit.

I have emailed that company for help.

No No No! the 75 is the inner diameter of the O-ring, instead of the OD.

Michael

Thanks for your input.

I looked around the house for something to measure my spare o-ring but have nothing that measures in mm, and besides - doubt that I could measure accurately. My attempt provided 2-7/8" ID, or 2.875" which converts to 73 mm, but my accuracy is doubtful.

I could have sworn I sorted by ID and just copied the data. Good catch!

Updated the link in the first post. Here it is again:

McMaster-Carr

So are we in full agreement now so that I can edit post #1?