Broken bar

[pineywoods]

Anyone ever had this happen? Brand new 20 inch bar. Plunge cut in a big standing dead red oak. Saw bogged down suddenly and when I pulled the bar out of the cut, it looked like this

Here's why
 






I will attempt repair by welding and dressing the sprocket, then assemble with rollers scrounged from a junk bar. wish me luck

[sawguy21]

I have not seen that happen. What brand of bar?

[lxskllr]

Since it's brand new, can you take it back? Looks like a defect to me.

[JohnW]

I did that to an Oregon Powermatch one time.  No fault of the bar, I had killed the bearings.  I was sawing (a regular cut) and the sprocket just went plink and fell out on the ground broken in half.  I suppose you could destroy your nose bearings if you get the nose pinched good enough.

[barbender]

I've broken few like that. One memorable instance, I was cutting up through a log in a pile, when I came through the log I hit the tip on the bottom of the next one and got a pretty good kickback. Broke the sprocket just like that. I also learned at that time that Windsor 3/8 replacement bar noses are getting really hard to find🤷‍♂️😁

[Grandpa]

That is not at all uncommon. What is uncommon, at least in my experience, is for it to happen on a new bar. That is something that usually happens when the tip is wore out.

[Air Lad]

The heat associated with welding could muck with the tempering property's of the cog
I have done these questionable things to keep the show on the road . Sometimes it works, sometimes it snowballs into more than you bargained for.
Warranty should be the first thought
Hope you get some satisfaction 

[Magicman]

Brand new 20 inch bar......I will attempt repair by welding

Nope, take it back to the store.