Huben Any issues or problems with Huben gk1 please share your experience

[Kenjeepman]

Just realized one if my 2 GK1 spare parts bags has a few K1 orings in it. Couple small ones and a valve o ring.. go figure the o-ring ive been waiting for. Wolfiek said they were out of stock and i said i believe they both use the same 11.6x1.8 o ring. She replied with “i dont think so” ..
One in my bag and other from a K1 spare parts kit i grabbed.

 

[Ultralight]

Just realized one if my 2 GK1 spare parts bags has a few K1 orings in it. Couple small ones and a valve o ring.. go figure the o-ring ive been waiting for. Wolfiek said they were out of stock and i said i believe they both use the same 11.6x1.8 o ring. She replied with “i dont think so” ..
One in my bag and other from a K1 spare parts kit i grabbed.

View attachment 576571

Interesting, I don't have such an o-ring in the bags I've seen.

 

[hvacguy]

GK1 manual shows brass screw oring (#59) as 4.5x1mm (https://www.hubenairguns.shop/colle...en-spare-parts-for-gk1?variant=47416272224588).

I bought some from oringsandmore.com and they're WAY too big. I end up using a 2.5x1.5mm with sanded down OD to fit. Gun holds air now but the brass doesn't go in all the way because the oring is still a little big. Anyone else run into this?

 

[WobblyHand]

GK1 manual shows brass screw oring (#59) as 4.5x1mm (https://www.hubenairguns.shop/colle...en-spare-parts-for-gk1?variant=47416272224588).

I bought some from oringsandmore.com and they're WAY too big. I end up using a 2.5x1.5mm with sanded down OD to fit. Gun holds air now but the brass doesn't go in all the way because the oring is still a little big. Anyone else run into this?

There's different ways to measure o-rings. Some places use the OD, others the ID. Take the OEM and place it in the center of the 4.5x1. It seems like it will just fit. Can you confirm that? If you have calipers, or a mm scale, can you estimate the ID of the 4.5x1 o-ring? Is it oh, 4.5mm ID?

So what you need might be a 4.5mm OD, and 1mm ID o-ring, but you ordered a 4.5mm ID x 1mm o-ring. To convert to ID based, that would be
4.5mm OD - 2 o-ring thicknesses (1) = 4.5-2 = 2.5mm ID x 1mm.

The 2.5mm ID x 1.5 is too big, since it's OD is 2.5mm (ID) + 2 o-ring thicknesses (1.5) = 2.5 + 2x1.5 = 5.5mm.

Based on some this, I'd say you need to find/buy 2.5mm ID x 1mm o-rings.
Here's a link for some. https://www.oringsandmore.com/fkm-o-ring-2-5-x-1mm-minimum-25-pcs/