Tsumura bar rivets

Treemuel · Dec 8, 2023

Just got a new Tsumura lightweight bar. Never had one before, but looks to me like the rivets that attach the tip aren’t fully peened. Is this normal for Tsumura bars? Definitely not what I’m used to on any other brand bars I’ve used. And when I replace tips myself I always peen them pretty flush.

Matias · Dec 8, 2023

I'm gonna go check, but I have that going on with a few bars; ECHO and Sugihara, I think. All Japanese, and none have ever given me issues, as weird as it seems

islandarb · Dec 9, 2023

Had a bunch of those bars, hated them for hardwoods.

Matias · Dec 9, 2023

islandarb said:
Had a bunch of those bars, hated them for hardwoods.

What was the issue?

evo · Dec 9, 2023

Matias said:
What was the issue?

Harder steel, rattles more.

Matias · Dec 9, 2023

That makes sense

southsoundtree · Dec 9, 2023

Are they as wide as the chain rivets?

Treemuel · Dec 9, 2023

southsoundtree said:
Are they as wide as the chain rivets?

I didn’t measure, but probably not quite. I don’t think it’ll be a problem in that regard, just seems odd to me.

Matias · Dec 9, 2023

Looking at mine, I can tell they used to stick out more ,but have been taken down when cross filling the burrs.

jmester · Dec 11, 2023

Have ran tsumara bars for years. In timber falling and tree work. The rivets that hold the tip on are usually always proud. They usually cause no issues. Have had to file/grind them down on some bars as the rivets would make the tip hang up a bit. Otherwise they are great bars at a reasonable price. I would recommend not greasing the sprocket tip bearing. Had problems with blowing the tips out after greasing them. That was also with a lot of bore cutting felling timber.