hi there this is my first post here!!
i have a couple of questions referring chains, i just been using mostly "GREEN" chains!!
i have a ms290 18" farm boss, i have used a 26rsc74 and liked it a lot!
but whats the difference between a 26rmc3 74 & 26rmc 74? i seen them labeled this way and can't figure it out!! whats also the difference between semi chisel and full chisel?i just looking for a good chain that will last more then 30 minutes!!
thanks for any help, Cliff!
rmc3 has an additional guard next to the raker that is designed to reduce kickback. They are fairly large and thick and make lowering the rakers and shaping them a pain in the ass and reduce the performance of the chain significantly as the cutters get shorter and you struggle to lower the rakers. I find it to be way more restrictive than LPX and its raker guards.
semi chisel has a rounded attack or cutting corner, whereas chisel has an angular attack corner. Because semichisel is already rounded it doesn't dull as easily and still performs reasonably well when it encounters dirt. The second the square/angular attack corner of chisel becomes damaged there is a huge change in performance. Semi chisel does cut slower but not by too much. For firewood purposes, for those who dislike sharpening, and for wood that is dirty, downed, skidded, etc, it is a very good choice.
To say a bit more, RMC is semi chisel and RSC is chisel.
the 3 on either series RMC3/RSC3 applies to the additional raker guard.
If you liked RSC you like chisel which is fine, so long as you're ok with sharpening it more often you should buy it.
The 26 denotes .325 and I think 063 guage, the rmc or rsc denotes the series of chain, and the last number denotes the number of links.