tuners, Q about the bsa meteor

[Shed tuner]

Jon, see link below, would this be the answer (for those of us who dont have the machining equipment) to convert to a Meteor to HW type seal?

http://www.vortekproducts.com/oursto...?product_id=95

it's basically there, but you need to somehow screw it to the piston head...

[Silverfox1307]

it's basically there, but you need to somehow screw it to the piston head...

Is that not what the countersunk bolt as seen in the image would be for and using a washer and locknut inside the piston in similar fashion to the threaded type of meteor piston head?

[Shed tuner]

Is that not what the countersunk bolt as seen in the image would be for and using a washer and locknut inside the piston in similar fashion to the threaded type of meteor piston head?

Could do yeah, but a washer and locknut might be a bit sloppy. Maybe adding a bush to where the bolt passes through the piston would address that. Or drill out the bolt hole to take a larger OD bolt.

I guess I worry slightly that the bolt is quite skinny... in a Gamo, it would be screwed straight into the piston, so no movement = not a problem, but in the Meteor it would be floating around, and subject to some forces that it might not be able to withstand - hence the bush idea. In fact, a threaded bush would be perfect - but a bigger bolt would be easier.

[Silverfox1307]

Could do yeah, but a washer and locknut might be a bit sloppy. Maybe adding a bush to where the bolt passes through the piston would address that. Or drill out the bolt hole to take a larger OD bolt.

I guess I worry slightly that the bolt is quite skinny... in a Gamo, it would be screwed straight into the piston, so no movement = not a problem, but in the Meteor it would be floating around, and subject to some forces that it might not be able to withstand - hence the bush idea. In fact, a threaded bush would be perfect - but a bigger bolt would be easier.

I see where you are coming from and agree with the larger bolt idea, this would possibly be more achievable for myself with only basic tools, fashioning a bush might be a bit out of my league! - I see that there is a Uk outlet for this part, I just might just send for it for the sake of a few quid and see how I get on - I'll let you know.

[Silverfox1307]

Could do yeah, but a washer and locknut might be a bit sloppy. Maybe adding a bush to where the bolt passes through the piston would address that. Or drill out the bolt hole to take a larger OD bolt.

I guess I worry slightly that the bolt is quite skinny... in a Gamo, it would be screwed straight into the piston, so no movement = not a problem, but in the Meteor it would be floating around, and subject to some forces that it might not be able to withstand - hence the bush idea. In fact, a threaded bush would be perfect - but a bigger bolt would be easier.

I now have the part and seal in 25mm and fitted it to the piston but I fear it may be slightly to small as when I push it up in the chamber it slides quite easily even with my finger over the transfer port, perhaps I should have ordered the 26mm and sized it to the chamber.

[Shed tuner]

I now have the part and seal in 25mm and fitted it to the piston but I fear it may be slightly to small as when I push it up in the chamber it slides quite easily even with my finger over the transfer port, perhaps I should have ordered the 26mm and sized it to the chamber.

yes, as I suggested above
You could try the lgu seal which is about 25.3/4mm. My guess is the meteor bore is 1" 25.4mm, so just go with 26 as I did... no sizing needed.

[Silverfox1307]

yes, as I suggested above
You could try the lgu seal which is about 25.3/4mm. My guess is the meteor bore is 1" 25.4mm, so just go with 26 as I did... no sizing needed.

point taken!
25mm being returned to be replaced with 26mm next week.

[piggy589]

Is there a commercially available adapter to fit a parachute type seal to the Meteor piston?.

I've a mate who's a cnc machinist in the aerospace industry,but having him make parts usually involves a long wait.