O Ring Sizes By @blackmax

[kena]

Webley Axsor O Ring Sizes
Notes:
1) Refer to FX Airguns FX2000 Drawing with Parts List https://fxairguns.com/wp-content/uploads/2020/04/fx2000-200406.pdf
2) Webley Axsor Transfer Port O rings differ in size to FX2000
3) Webley Axsor Fill Valve differs to FX2000 (Axsor has stem on inlet valve)

Dwg No.​	ART No.​	O Ring Size​	Description​	Total​
57​	2528​	1.5x1.0 NBR70	Exhaust Valve Stem	1​
58​	5111​	2.5x1.5 NBR90	Inlet Valve Brass Shuttle	1​
59​	2529​	4.3x1.5 NBR70	Exhaust Valve Seat and Inlet Valve Stem Seal	2​
60​	2530​	2.9x1.78 NBR70	Transfer Port (Webley Axsor)	2​
61​	5108​	5.28x1.78 NBR70	Fill Probe	2​
62​	5109​	11.6x2.4 NBR70	Barrel Support (fore end)	1​
63​	5101​	20x2.5 NBR70	Main Cylinder Seals (4) & Pellet Magazine (1)	5​
87​	5112​	5.28x1.78 NBR70	Breech Seal (.22 Calibre) & Barrel	3​
59​	2529​	4.3x1.5 NBR70	Breech Seal (.177 Calibre)	1​

Just resealed my Axsor and noted the main cylinder seal size of 20x2.5 given above will not seal correctly. It may well work in the FX2000 but my Axsor needed 18.72x2.62N70 to seal correctly

 

[Deejayuu]

Walther Rotex RM8. Courtesy of Bigbadbear

 

[sagalout]

Huma reg, 8-15mm piston, as per the BSA Ultra SE et al.
2 off 5.5x1.5mm feels like shore 90, but I always used shore 70 in the past.
1 off 12.5x1.5mm feels like shore 70 - actually shore 90

 

[rkr]

BSA Ultra/Scorpion models fill valve o-ring = BS106 4.42MM ID X 2.62MM C/S

 

[56split]

BRK Ghost O rings.

 

[Deejayuu]

Hatsan AT44-10 courtesy of @mc100

https://airgunforums.co.uk/attachments/at44-oring-jpg.829746/

 

[Deejayuu]

Logun S16 Withnthanks to @the logun-ator
Ahem, tell you the truth , I don't know.
Mind you, I've done that many I know them off by heart
Mains 23.5x2.5
Barrel and inner exhaust probe 5.6x1.6
Early MK2/2 probe end 3.5x1
Link tube 2.5x1
Probe body 4x1
Inner valve block 7.65x1.78 (bs011)
Under inlet 17.3 X2. 4
S16s inlet 14 ishx2. 62 (bs somic or other)
S16 bottle valve 11.5x2
Late s16s tranny 7x1.2

 

[Blackmax]

I've reasoned the best place to obtain replacement airgun O rings is the gun manufacturer, so far so good, however there is a large number of O ring suppliers not associated with any airgun maker. Question. Would you favour the idea the gun maker's O rings to be the best and sourcing elsewhere could hold a risk of incompatibility?

Have you not read the earlier posts?

The thread is for O ring data only, if you want to ask technical information, ask in the technical section.

 

[ped]

BSA Ultra/Scorpion models fill valve o-ring = BS106 4.42MM ID X 2.62MM C/S

the clx is different ,i couldn't decide if it was a bs010 or a 6x1.5 and it uses a garbage plastic non return

 

[rockdrill]

Air Arms Pro-Target Mk3 pattern regulator seals:

View attachment 717998
Picture courtesy @cloverleaf.

Spigot seal: BS011, N70

Piston Small End (Gland) Seal: BS008, PUR90

Piston Big End Seal: BS012, N70

Following a pm discussion @Blackmax has asked me to add a comment about another o-ring that earlier RN10's and Pro-Targets feature that seals over the spigot on the front of the regulator:

Early spigot style. Spigot sealing o-ring (arrowed).

The seal that lies up inside the end plug of the cylinder (with the large brass thread insert) that effects a seal over the brass spigot is a hangover from the detaching cylinder of the original 10m variant as the spigot served to open the check valve on the cylinder when it was screwed on.

This will relate to the RN10 Mk1 / 2 and early Pro-Target badged examples.

0Somewhere late in the Mk2 and onwards into the Mk3 they changed to using a U-cup lip type seal with a much narrower style spigot on the regulator (and lost the check valve on the FT models).

Later spigot style.

The exploded drawing on some of the Pro-Target manuals shows the o-ring in question as part (RN) 236, but the parts listing doesn't list it, as it had already been updated for the lip seal (RN237) of the later models.

Checking on the part number, RN236 it is listed as being an 8 x 2 mm NBR70 o-ring.

 

[Kingwahwah]

Bsa ultra se, Airtech reg orings. Reg is circa 2013 to 2015. Not quite the huma rip off I've read in terms of orings. The XTX ultra/r10 huma video is how to service.

Two 5.5x1.5 90 nbr (same as huma)
Two 12x2 90 nbr (different!)

Also for for guage mount
Four 13x2 nbr 90 (same as huma, std bsa oring packs will not work)