Problems cutting with the Stihl 1/4 pitch chain

[High Scale]

Nose sprocket? I run a modded 150 and have noticed the nose sprocket to be pretty poor.

[rapalaman]

I have exactly the same problem with mine. Tried a new bar, new chain, the same result again. Quite frustrating. Other than that, cracking little saw and my go to tool for pruning/light reductions -along with a silky of course!

[Steve Bullman]

I don't think it's the bar, both my saws do it and have from new. I really think it's just me....oh and rapalaman

 

 

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[TIMON]

I don't think it's the bar, both my saws do it and have from new. I really think it's just me....oh and rapalaman

 

 

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I was using mine on a reduction yesterday and found the same thing happening. When I was close in two handed it was fine but overhead cuts or at full stretch one handed it started to jam. I put it down to the bar/chain not being very forgiving, requiring the hand pressure to be applied at the perfect angle.

 

 

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[High Scale]

Mod the saw, more power, more speed, less likely to happen.

[Steve Bullman]

Mod the saw, more power, more speed, less likely to happen.

 

 

What if the police find out?

 

 

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[Pinkfoot]

What if the police find out?

 

 

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Then they will suspend you from a rope at a scary height.

That will teach you.

 

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[High Scale]

What if the police find out?

 

 

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Youll have to flee to Spain.

[arboriculturist]

I don't think it's the bar, both my saws do it and have from new. I really think it's just me....oh and rapalaman

 

 

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It''s not you Steve !

 

Even when new, the tolerance between the drive links and the bar groove sides are enough to allow the chain to lean to the right or to the left in relation to the bar in certain cutting situations.

 

Cutting at 90 degrees to the timber in a GOOD ergonomic work position and this will not happen, as the tie straps on either side of the chain are pressed down on top of the bar rails as you cut. Similarly cutting at other angles to the timber in a GOOD ergonomic work position and this will not happen

 

Cutting at different angles to the timber in a POOR ergonomic work position and the chain can lift off the rails on one side when in the kerf, resulting in the cutting angle geometry altering hence the issues you have been experiencing.

 

At reach, awkward positions etc. the pressure exerted on the bar is often not exactly following the line of the initial start of the cut and the chain is lifting one side off the rails as the cut progresses, leading to a curved cut / chain binding.

 

The smaller the pitch of the chain, the greater the level of risk of this anomaly occuring.

 

Smaller pitches have many advantages as we all realise, but there are also negatives.

 

I hope this helps.

[eagleye]

what size file are you using