https://hobbyking.com/en_us/1-5th-brush ... oup_0_desc
https://hobbyking.com/en_us/turnigy-aqu ... oup_0_desc
They're fairly low reving compared to other motors of the same size, "only" around 25k. SSS claim their 56104 is good for 50k rpm and I've not come across anyone using them complaining about exaggerated figures but no matter how good they are around 25-30% of that 14kw is going to be wasted as heat. That still leaves at least 10kw of output power for less than 1.5kg and at a fairly easy speed to gear down for a saw, 10-12k rpm is normal for an unloaded production saw and 20k would be an easy figure for hot saw chain speeds so only around 2 or 3 to 1.
There are some crazy high reving 70mm inrunners around that might be worth a look when they get more popular but for now 56mm is the low hanging fruit, putting in more volts to see what revs they'll hold together to isn't going to break the bank.
That look absolutely bang on! Thanks a lot, so long as they're ok with oil they should be perfect for the job I'll probably have a look at making a standalone unit, pump, tank and control all in one. Motorcycle chain oilers are a godsend for anyone doing high milage and I'm sure a lot of folks on e-bikes would say the same if they where readily available.Hillhater wrote: ↑Mar 03 2020 4:19pmUnless the OP or his saw builder already has a good grounding in electric drives,controller set up and programming, and the finesse of high performance lipo packs etc etc... i would suggest the first move would be to get a team together with the necessary skills and experience.
You do not want to have a hi power lipo pack burst into flames either in your shop or on the competition platform !
Most domestic Espresso Coffee machines use a small, low flowrate, solenoid pump (ULKA EX 5) available in various voltages.stan.distortion wrote: ↑Mar 03 2020 10:09amOn a side note, if anyone knows of a readily available electric pump for the chain oil please let me know! It's the only thing that's held up this project moving from a converted IC saw to a custom made electric. The solenoid pumps used on engineering machine oilers are about the ideal but it needs to be much smaller. That would open up the option for load and speed regulated oiling rather than just speed. Thanks
https://www.ebay.com.au/itm/Breville-Su ... 0677.m4598
They are used with water, but would handle oil im sure
A bump to the safety concerns with lipo's too! Saws usually live in a shed with sawdust, bits of timber, petrol cans, oil cans.... the thoughts of a lipo on charge in the middle of it are giving me a cold sweat!