Rolock 90 o-rings - another post

[Apteryx54]

@mr_v thank you!

 

[lexvil]

I am using a 96-2.5 and it work perfectly, I can find no info about the system changing and I’m considering ordering a new set from DGX to see if anything changed, I have Rolock 90 which came in a Rolock box.

I have heard of a Chinese knock off of the 90’s but haven’t seen them in person

 

[mr_v]

I am using a 96-2.5 and it work perfectly, I can find no info about the system changing and I’m considering ordering a new set from DGX to see if anything changed, I have Rolock 90 which came in a Rolock box.

I have heard of a Chinese knock off of the 90’s but haven’t seen them in person

You need to post pictures of your Rolock here. I got the Rolock 90 directly from SF Tech. Another way of going about it - measure your ID and let us know the outcome. The OP and I clearly have the same Rolock setup and measurements.

Btw, 2.5 x 96 will actually fit but it was so loose that I could unlock the glove with a slight twist. I am keeping one sleeve as-is with all original setup just in case.

 

[lexvil]

It’s not easy measuring these and take a picture, old on left new on right

Unmounted 96

Mounted 103 ~

Mine work great, the new one may actually turn a little easier but has never moved in use.

 

[mr_v]

Well. This explains it. Your Rolock diameter appears to be smaller, close to 94-95mm. I don't know why, but I was under an impression that all Rolock were the same size.

 

[lexvil]

Well. This explains it. Your Rolock diameter appears to be smaller, close to 94-95mm. I don't know why, but I was under an impression that all Rolock were the same size.

I knew there was the 3 series that are a little smaller and made to fit glued in seals. I wish the would have some wiz kid come in and update the site so information was a bit easier to gather.

 

[lexvil]

I have these o-rings coming in soon:

Metric Buna O-rings 101.27 x 2.62mm Minimum 5 pcs

22.3 mm ID x 27.1 mm OD x 2.4 mm CS-Price for 25 pcs

oringsandmore.com

I ordered 2.5mm x 105mm from McMaster Carr:

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

Note, o-rings can handle 3% stretch with reasonable cross-section loss, so 101mm is okay for 2.62mm cross-section.

A follow up, my new set with arrows have arrived and it does look like the o ring size is different

I put one of my new 96mm ones in and it does turn easier, I don’t think it would turn in use but..?
The original, the old original and a new 96

And they have switched from the divot to arrows.
Interestingly the gloves rings fit either suit ring

Everything seems the same

It would be nice if they explained things on the site but it’s still the best, in my opinion, ring system.

 

[mr_v]

Yes, the “dimple” and the “chevron” glove side rings are interchangeable. You don’t want thinner, 2.5mm cross section o-rings, as they will twist and don off easily leading to accidents.

2.62 x 101 mm o-rings fit the best. Tested in the Great Lakes last week and the size worked well.

 

[lexvil]

Yes, the “dimple” and the “chevron” glove side rings are interchangeable. You don’t want thinner, 2.5mm cross section o-rings, as they will twist and don off easily leading to accidents.

2.62 x 101 mm o-rings fit the best. Tested in the Great Lakes last week and the size worked well.

How hard were those to manipulate into the groove? The 96mm ones had over an inch left over that I had to massage back in, the cross section really seems to be more of an issue after the stretch.

 

[mr_v]

How hard were those to manipulate into the groove? The 96mm ones had over an inch left over that I had to massage back in, the cross section really seems to be more of an issue after the stretch.

Not hard at all. I think the original o-rings are larger than 101mm in ID as I had to pack more of the extra slack into the grove. Also, the original orings are harder to don off. I ran a few tests in the Lakes and will post a more detailed response when I am back home.