Replacing Meteor hinge pin with Bolt

[Dornfelderliebe]

Or buy a rifle with a bolt already fitted 😁

But that would stop all my fun. Besides as somebody else said this is an itch I need to scratch.

[T 20]

But that would stop all my fun. Besides as somebody else said this is an itch I need to scratch.

Many moons ago in Sporting Air Rifle, a chap showed how he drilled and taped the ends of a BSA breech pin at 3 mm or 4 mm and fitted countersunk bolts into the ends of the bolt.

The trick is to alter the pin length in order to get the bolts to lock onto the end of the pin just as the bolt head nips the jaws tight.


All the best Mick

[Dornfelderliebe]

That is neat. Superb lateral thinking.

[Barryg]

Could this be made to fit.

[Dornfelderliebe]

It's might where is that from?

[Barryg]

It's might where is that from?

Every Diana BB hinge bolt from the 24 to the most powerful N-Tec, look on Chambers

[Dornfelderliebe]

Every Diana BB hinge bolt from the 24 to the most powerful N-Tec, look on Chambers

Thankyou Barry. Tomorrow I shall do some tinkering with the Merc S bolt If it's too short I shall look into that, Cheers

[Shed tuner]

It's might where is that from?

It's Barry - you had to ask ?

[evert]

Many moons ago in Sporting Air Rifle, a chap showed how he drilled and taped the ends of a BSA breech pin at 3 mm or 4 mm and fitted countersunk bolts into the ends of the bolt.

The trick is to alter the pin length in order to get the bolts to lock onto the end of the pin just as the bolt head nips the jaws tight.


All the best Mick

A good idea, and if you cut the pin a tad too short, you could make small shims to adjust the length.

Could this be made to fit.

Been thinking along those lines.. It resembles the idea Mick references.

But the guns I have that have fitted with oversize pins without any clamping methods work well if they are used carefully, so I've stopped there.

[T 20]

That is neat. Superb lateral thinking.

A good idea, and if you cut the pin a tad too short, you could make small shims to adjust the length.

Thinking on this, the article in SAR was written nearly 40 years ago and engineering technology has moved on a bit since then, we now regularly use Smurf Juice, Monkey Blood and Gorilla Snot on fasteners to lock them in place.

If you cut the pin a tad too short, you could fit one screw in one end with low strength blue loctite and assemble the gun, then fit the other screw with Red or Green high strength loctite, and adjust the pin as required.
Once the loctite has cured you'll have a solid, adjusted pin that can still be undone from the blue loctited end if needed.




All the best Mick

[evert]

A couple weeks ago I bought another Meteor... a mk4 this time. The mk3 is quite common here in Norway, but the mk4 seems to be scarcer (I only had two ;-) ). The gun had not seen very much use, and just needed a new buffer and breech seal to perform well. In fact, the O-ring was still quite good, and the spring was straight and seems to be in good condition.

Anyway, the gun had tight jaws, and locks up really well, and in my experience they stay that way if not abused. A light slap on the barrel to unlock, and then cocking without causing sideways stress on the jaws ensures long life.
I understand the urge for "improvements", but the old Meteors can perform well just the way they were made if you set them up properly and dont abuse them...

[Dornfelderliebe]

That is a good point, as the saying goes if it ain't broke don't fix it unless of course you want to conduct an experiment.

[keith66]

Trouble is they are a cheap gun made of cheaper with a high lead content. I wore mine out in just 4 years & by the end was squashing the barrel jaws in a vice every week. If you wanted to fill the jaws solid you could inject Body filler from a syringe Or you could buy a gun with properly engineered barrel jaws & cylinder like a Relum taurus!

[Papa g]

Many moons ago in Sporting Air Rifle, a chap showed how he drilled and taped the ends of a BSA breech pin at 3 mm or 4 mm and fitted countersunk bolts into the ends of the bolt.

The trick is to alter the pin length in order to get the bolts to lock onto the end of the pin just as the bolt head nips the jaws tight.
,


All the best Mick

I did something similar Mick, I drilled the hinge pin the whole way through to take a Diana 34 type bolt and adjusted the pin length accordingly and countersunk both sides of the breachjaws then put a chamfer on the nut and bolt to match, works perfectly, this also works on the Webley hawk/Vulcan jaws.
Regards Graham. Ah just noticed I’ve been beaten to the punch with this one!😊👍🏻

[trajectory]

If the objective is to prevent correctly fitting jaws opening up rather than using a bolt to close them & tightenn up a poor fit then the idea of capping a correctly fitting pin might be the most appropriate idea. An elegant solution if no great corrective compressive force is required.