Apeks O-rings vs. McMaster

[rsingler]

Working on converting this to Word and PDF now.
But @buddhasummer , the listed ID's don't quite match the BS1806 size that's attributed.

For example, the first item AP1154 is a 1.78x6mm.
A BS1806 010 is 1.78x6.07mm

So my question is, which is correct?
Is the Apeks oring 6mm ID and a BS010 is the closest match? Or is the listed ID rounded off?
The reason I ask is that the width is the precise cross section of a BS1806 oring.

Did Apeks really spec those ID's?
It probably doesn't matter, but it would be nice to know.

 

[buddhasummer]

Would be lovely to has this attached as a PDF file...just saying.

I tried but seems it's beyond my IT skill level. Happy to email it you you to see if you can do so.

 

[Couv]

I tried but seems it's beyond my IT skill level. Happy to email it you you to see if you can do so.

Sold.

 

[buddhasummer]

Sold.

Sent.

 

[buddhasummer]

Sent a different file too, we can compare them both. Cheers.

 

[Couv]

received...thanks.

 

[buddhasummer]

Working on converting this to Word and PDF now.
But @buddhasummer , the listed ID's don't quite match the BS1806 size that's attributed.

For example, the first item AP1154 is a 1.78x6mm.
A BS1806 010 is 1.78x6.07mm

So my question is, which is correct?
Is the Apeks oring 6mm ID and a BS010 is the closest match? Or is the listed ID rounded off?
The reason I ask is that the width is the precise cross section of a BS1806 oring.

Did Apeks really spec those ID's?
It probably doesn't matter, but it would be nice to know.

I heave no idea, these are just files I picked up along the DIY way.

The info is now in expert hands, I'll leave it to you guys.

 

[Couv]

No expert, don't have any Apeks so I'll leave the proofreading to those more familiar.

 

[buddhasummer]

No expert, don't have any Apeks so I'll leave the proofreading to those more familiar.

Thank you sir.

 

[rsingler]

Here's a crosswalk using Buddha's data, along with a Word file from another of our SB members from long ago.
As you'll see, I can't find a spec for a BS607, but coincidentally, it matches an old Parker 5-series perfectly.
McMaster has EPDM orings in most of the sizes, but the Shore is only 70.
If you take Viton, you'll get Shore 75, which is closer.
There's only one o-ring which is N/A via McMaster.
I've coded the crosswalk green if the McMaster o-ring manufacturing tolerance covered the spec size on Buddha's list.
It's in yellow if the manufacturing tolerance was slightly smaller or larger than the listed size.
I frankly can't believe that Apeks would spec a standard cross-section like 1.78mm/0.070'', and then use an oddball ID.
My guess is that the list ID's are rounded off. It was the very last o-ring (a BS607) that I can't find in any list, that made me think this way, since it perfectly matches a Parker 5-632.