jerseyjeff
ArboristSite Member
I have a pair of gas saws a redmax 4500 with a 16 inch bar with a bored out muffler that is fantastic, and a dolkita 6400 with a big bore piston kit running a 24 inch sugihara bar it is a really great saw for power to weight. I also have an echo PAS 10 inch pole pruner, so I may have lied about just 2 saws. I would like a battery powered chainsaw because neither of my current saws are subtle, and sometimes it would be nice to have something a little more quiet. I have Makita 18v tools and EGO 56v mower, and blower, so that narrows saws down to the Makita 18/36 v or the EGO. Ego is making some claims that I can not get the math to work on.
https://egopowerplus.com/16-inch-chain-saw-40cc/
They claim there 16inch power plus is equivalent to a 40 cc saw. OK great, so Sub 10 lbs, 2-2.4 hp, 13000 rpm, Good stuff, but then the math goes to crap. I know it has a brushless motor so, way more torque, right away, but still. EGO claims with a 3/8 .043 gauge 52 link chain, 40 cc equivalent with a 2.5 amp battery, 20 m/s chain speed.
Now the numbers.
Volts x Amps = Watts
all EGO batteries are 56 Volts, the 2.5 delivers 140 watts. the 5 amp 280, and the 12 amp, 672.
Turns out there is 746 watts per hp.
My 45 cc saw makes 2.5 hp or 1865 watts.
140 does not equal 1865. I know there are torque differences, but it is a watt difference of 93 percent.
Help! I don't get it!
https://egopowerplus.com/16-inch-chain-saw-40cc/
They claim there 16inch power plus is equivalent to a 40 cc saw. OK great, so Sub 10 lbs, 2-2.4 hp, 13000 rpm, Good stuff, but then the math goes to crap. I know it has a brushless motor so, way more torque, right away, but still. EGO claims with a 3/8 .043 gauge 52 link chain, 40 cc equivalent with a 2.5 amp battery, 20 m/s chain speed.
Now the numbers.
Volts x Amps = Watts
all EGO batteries are 56 Volts, the 2.5 delivers 140 watts. the 5 amp 280, and the 12 amp, 672.
Turns out there is 746 watts per hp.
My 45 cc saw makes 2.5 hp or 1865 watts.
140 does not equal 1865. I know there are torque differences, but it is a watt difference of 93 percent.
Help! I don't get it!