What grease should I use to reduce seepage from loading tap leak?

[xbow]

Every days an education, I’ve never heard of damping grease before.

[greenwayjames]

Surely damping and heavy greases are made to fill large gaps otherwise it just gets squeezed out on assembly. Getting rid of that gap by plating up to original dimensions as has been suggested would be a far better course of action?
Webley Mk111's taps would generally have a good seal while Airsporter Mk1, and all that followed, were always leakers but shot harder. Does it make that much difference?

[Dornfelderliebe]

I think the idea behind thick damping grease is that if the tap is fairly good, the thin layer of grease will stick like *** to a blanket and form a seal. If the gap is too wide it will get blown out as mine did. With electroplating will need to lap the tap to produce a perfect and likely more permanent seal. I shall to lap it with 1000 grit wet& dry (dry at 1st) and through trial and error attempt to make a perfect seal. Even then I will reassemble with minute amount of Nyogel just to act as a lubricant.
If the seal was so tight that it pushed all the grease out upon reassembly , I would expect the tap already to make a good seal

[bill57]

Re Nyogel 767a - until you try it you won't understand. It is very sticky with a consistency closer to freshly squeezed 2 part epoxy.

[andrewM]

I have used Nyogel 767 on my Webley Ospreys for several years and would never use anything else now. I bought a tube of it (it wasn't cheap) after I realized that Rocol had ceased manufacture of Kilopoise grease, which would have been my first choice - and it was very pricey as well.

It's difficult to describe how effective this grease is in this role, you have to try it yourself to understand that everything else is basically a waste of time. Buy some, if you're a tap loader fan you will never regret it.

Thanks for that Bill. Do you mean Nyogel 767A? I looked it up and it says it is a synthetic, silica based grease: "A silica thickened, heavy viscosity, synthetic hydrocarbon grease intended for mechanical and electromechanical components that require a heavy level of damping. Used to reduce free motion and to quiet operating noise of loosely-fitting components."

Quite expensive, as you say, with a small tube costing £35 but I have not looked more thoroughly for competing prices.

Rgds
A

[bill57]

Hi Andrew,

Yup, 767a. It seems expensive but specialist lubricants are, in industry nobody would blink at that. I bought a tube which will last my lifetime, and have never regretted it. When you think of what you spend on other aspects of the sport it's a pittance really.

Webley Ospreys are my go-to guns, they shoot fantastically well and it's possible that without this grease I would have moved on from them years ago.

As a side note, I do not get hung up on tap loaders sealing perfectly. On my guns some seal much better than others but it makes little difference to how well they shoot. A fluid mechanics expert could no doubt explain that better to us, but I suspect that air under such sudden compression cannot easily escape through tiny leaks.

[Modski66]

Some enterprising soul is selling 1g pots of Nyogel 767a for £5...

https://www./itm/164761651502

[Dornfelderliebe]

Some enterprising soul is selling 1g pots of Nyogel 767a for £5...

https://www./itm/164761651502

That's what I bought

[Modski66]

Doh!

I missed that little nugget of information earlier in the thread.