Air rifle piston polishing

[bighit]

Not sure if it happens on all airguns but the rear of the piston in my HW99S scored the cylinder on cocking. . I suspect other HW models do it.

Piston in a drill and polished with emery paper.

Bumslide or other moly grease on the rear of the piston.

[Fudgeisbest]

Not sure if it happens on all airguns but the rear of the piston in my HW99S scored the cylinder on cocking. . I suspect other HW models do it.

Piston in a drill and polished with emery paper.

Bumslide or other moly grease on the rear of the piston.

in that case would it not be better to coat the rear of the piston with ptfe spray.

Thanks for the reply.

[junglie]

in that case would it not be better to coat the rear of the piston with ptfe spray.

Thanks for the reply.

no
i've tried it moly grease or dryslide preferably for me everytime.

[bighit]

in that case would it not be better to coat the rear of the piston with ptfe spray.

Thanks for the reply.

Not tried PTFE spray on mine

Moly or bumslide only . As Junglie said above.

[Mach 1.5]

The end of the piston was also polished back in the day as under cocking this may well come in to contact with the cylinder. There is no need to polish the entire piston. Mach 1.5

[TonyL]

Welcome to the forum, Mr Fudge.

I always polish the piston (by hand, with rag and Solvol) just because it seems the nice thing to do and looks much prettier. Then a small dab of moly paste around the tail / bearing surface and the tiniest trace around the edge of the seal. Then, once the piston is pushed home, a more liberal application of moly grease around the circumference of the cylinder, behind the piston.

[Vernal]

[QUOTE=TonyL;8086229]Welcome to the forum, Mr Fudge.

I always polish the piston (by hand, with rag and Solvol) just because it seems the nice thing to do and looks much prettier.

Definitely, even when there is a rear bearing to support the piston. There is a lovely warm glow from knowing how nice your piston looks, even when no one can see it.

[gtfreight]

Welcome to the forum, Mr Fudge.

I always polish the piston (by hand, with rag and Solvol) just because it seems the nice thing to do and looks much prettier.

Definitely, even when there is a rear bearing to support the piston. There is a lovely warm glow from knowing how nice your piston looks, even when no one can see it.

Is this a euphemism Tony?