might have ****** the thread for the av buffer that is between the engine and the handle.

[bradislav]

hi guys,kinda ****** up 10% of the thread of that hole,the original screw goes in a little but then feels like its really posing a lot of resistance,is the chainsaw compromised? on a 395xp,thanks for any assistance

 

[Mad Professor]

What model saw and which buffer?

Post some pictures.

 

[bradislav]

What model saw and which buffer?

Post some pictures.

its a 395xp,its the buffer thats screwed in the cylinder,I'll try to get some more pics,its hard to focus on it

 

[bradislav]

its a 395xp,its the buffer thats screwed in the cylinder,I'll try to get some more pics,its hard to focus on it

its a 395xp,its the buffer thats screwed in the cylinder,I'll try to get some more pics,its hard to focus on it

i ordered a new av it will come next week ,but i'm really scared that the thread might be compromised and the saw is unuseable without the AV for the handle

 

[Mad Professor]

What size is the screw, and is there enough metal to tap the hole for an oversize one?

Or maybe use an insert if a bigger screw won't fit through the handle/buffer.

Could also try running a bottoming tap into the hole to clean up what threads are left.

 

[bradislav]

What size is the screw, and is there enough metal to tap the hole for an oversize one?

Or maybe use an insert if a bigger screw won't fit through the handle/buffer.

Could also try running a bottoming tap into the hole to clean up what threads are left.

its just about 10% of the depth of the thread that's ******,if i spin the screw will it catch on the good part of the thread once it gets to it?

 

[Mad Professor]

its just about 10% of the depth of the thread that's ******,if i spin the screw will it catch on the good part of the thread once it gets to it?

I'd try the bottoming tap to clean out the threads still there.

 

[MacAttack]

As suggested, clean up the threads with a bottom tap or a thread chaser. Just be very careful you're going in straight and following the good threads.

I just recently had to chase the threads for the flywheel nut on a crankshaft. The very end of the threads got buggered up in the mail. Had me sweating as the saw was almost completely together when I discovered I couldn't thread on the flywheel nut. But I was very careful with a thread die and it cleaned right up.

 

[bradislav]

As suggested, clean up the threads with a bottom tap or a thread chaser. Just be very careful you're going in straight and following the good threads.

I just recently had to chase the threads for the flywheel nut on a crankshaft. The very end of the threads got buggered up in the mail. Had me sweating as the saw was almost completely together when I discovered I couldn't thread on the flywheel nut. But I was very careful with a thread die and it cleaned right up.

damn man that's an extremely complicated maneuvre,i need a ton of tools as I got no one capable of doing it

 

[bradislav]

As suggested, clean up the threads with a bottom tap or a thread chaser. Just be very careful you're going in straight and following the good threads.

I just recently had to chase the threads for the flywheel nut on a crankshaft. The very end of the threads got buggered up in the mail. Had me sweating as the saw was almost completely together when I discovered I couldn't thread on the flywheel nut. But I was very careful with a thread die and it cleaned right up.

i wouldnt wanna increase the size as the screw for that av mount is really small and impossible to change

 

[Mad Professor]

damn man that's an extremely complicated maneuvre,i need a ton of tools as I got no one capable of doing it

Just buy the correct tap, just a few$$.

1) Grind the very tip off and chase the threads until it bottoms. 2) Grind some more off and repeat.

May want to grind in 3 increments depending on how deep the hole is

Make sure you follow original threads or it will be a worse mess.

 

[pioneerguy600]

A tap is cheaper than buying a new cylinder,especially a new OEM cylinder. Bottoming taps are a common item not a rare item at all. Even a T tap handle to hold a tap won`t break the bank. Buying the tools and inserts to drill out the existing hole and install an insert is a lot more expensive than a threading tap and handle. Possible to find a friend or neighbor with the tools, best bet.

 

[bradislav]

A tap is cheaper than buying a new cylinder,especially a new OEM cylinder. Bottoming taps are a common item not a rare item at all. Even a T tap handle to hold a tap won`t break the bank. Buying the tools and inserts to drill out the existing hole and install an insert is a lot more expensive than a threading tap and handle. Possible to find a friend or neighbor with the tools, best bet.

where I'm from no deal my friend,biggest cc saw aside mine is a 50cc,these guys dont even know how to sharpen chains,communists man

 

[Bob Hedgecutter]

Its a VERY common metric European thread and any hardware store over there will have the correct tap for a couple of Euro.
Should be 5mm X 0.8.

 

[pioneerguy600]

where I'm from no deal my friend,biggest cc saw aside mine is a 50cc,these guys dont even know how to sharpen chains,communists man

It does not matter the size of the saw, that is a small common size bolt thread commonly available in any automotive or even hardware store where machine screws or small bolts are sold. Bob Hedgecutter covered the bolt size and thread count.

 

[Dennisthemenace]

Carefully run a 4mm tap down it

 

[MacAttack]

i wouldnt wanna increase the size as the screw for that av mount is really small and impossible to change

Using a tap or thread chaser to fix the threads will not increase the screw size. All you need to do is "fix" the damaged threads on the end of the screw hole. It sounds like you need a 4mm or 5mm tap. A set of metric taps and dies would be a good investment.

 

[Mad Professor]

Using a tap or thread chaser to fix the threads will not increase the screw size. All you need to do is "fix" the damaged threads on the end of the screw hole. It sounds like you need a 4mm or 5mm tap. A set of metric taps and dies would be a good investment.

^^^^

A good hardware store will have a display board with nuts and screws, of various diameters and pitches, thread pitch gauge. Bring the screw with you see and which one it fits. Then buy the correct tap.



@Bob Hedgecutter mentioned a 5mm X 0.80 . Not sure if he got that from an IPL or from experience.

 

[Bob Hedgecutter]

^^^^

A good hardware store will have a display board with nuts and screws, of various diameters and pitches, thread pitch gauge. Bring the screw with you see and which one it fits. Then buy the correct tap.

View attachment 1224588

@Bob Hedgecutter mentioned a 5mm X 0.80 . Not sure if he got that from an IPL or from experience.

From memory if I was being fair- but I cant see NZ saws being different from Eastern Bloc ones.

 

[bradislav]

will follow your advice and do some research as to how to execute the maneuvre. thanks a lot for the quick replies this site is awesome