Trapper_Pete
ArboristSite Operative
I have been thinking
are to many saws being sold with too long of a bar for their power?
I just because I got a deal on them and I was looking for lower cost bar and chain for cutting around a barn yard and fence rows picked up an 18 inch bar for my Jred 2255 , the saw came with a 20 inch bar and it is handy , but for constant bucking of logs this 18 is great. I am thinking a good rule of thumb is displacement in CC / 3 = appropriate bar length round to the closes available length.
the 2255/455 is not slowed down in maple with an 18 inch bar , and 3/8 chisel chain just a steady stream of chip.
I figure few people notice and they would rather have the bar length for those few cuts they need it on , but when bucking firewood in the 24-32 inch diameter size and whole bar is in wood all the time. this seems like it is testing the limits of the saw much more.
another reason people may not notice is saws mostly come with safety chain , smaller chip less to pull easier on the saw , but when you get away from that original anti kickback / reduced kick back chain and into a Semi chisel or chisel it is pulling to much. for short periods of time or in smaller wood it isn't an issue. but when you put that in larger logs , cut after cut after cut it is to much for the saw?
I suppose one way to describe it is as duty cycle with a lower duty cycle a longer bar & chain works.
but if you want 100% duty cycle just like in welders where you need much heavier components to handle the heat , on a saw you need more displacement.
what are your thoughts , what is the appropriate bar to displacement ratio?
are to many saws being sold with too long of a bar for their power?
I just because I got a deal on them and I was looking for lower cost bar and chain for cutting around a barn yard and fence rows picked up an 18 inch bar for my Jred 2255 , the saw came with a 20 inch bar and it is handy , but for constant bucking of logs this 18 is great. I am thinking a good rule of thumb is displacement in CC / 3 = appropriate bar length round to the closes available length.
the 2255/455 is not slowed down in maple with an 18 inch bar , and 3/8 chisel chain just a steady stream of chip.
I figure few people notice and they would rather have the bar length for those few cuts they need it on , but when bucking firewood in the 24-32 inch diameter size and whole bar is in wood all the time. this seems like it is testing the limits of the saw much more.
another reason people may not notice is saws mostly come with safety chain , smaller chip less to pull easier on the saw , but when you get away from that original anti kickback / reduced kick back chain and into a Semi chisel or chisel it is pulling to much. for short periods of time or in smaller wood it isn't an issue. but when you put that in larger logs , cut after cut after cut it is to much for the saw?
I suppose one way to describe it is as duty cycle with a lower duty cycle a longer bar & chain works.
but if you want 100% duty cycle just like in welders where you need much heavier components to handle the heat , on a saw you need more displacement.
what are your thoughts , what is the appropriate bar to displacement ratio?