Search found 310 matches

by Kodin
Dec 14 2015 10:22pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223599

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

I'm just going by that the cable sheath is labeled as being for 3mm phase wires. Kinda doubt it more now, as they likely measure with insulation and round up. Either way, since I have my motor completely torn apart, (parts are in at least 3 separate rooms in the house so far,) I don't think I'll be ...
by Kodin
Dec 13 2015 11:56pm
Forum: E-Bike Technical
Topic: Turning 4130 - Now 4340
Replies: 11
Views: 1848

Re: Turning 4130 - Now 4340

Interestingly, I don't seem to see any measureable difference there at this thickness. And the cutting bits I'm using are sharp enough that they seem to do the job _REALLY_ well. This lathe is capable of cutting mild steel in 1/4" depth-of-cut, and I've seen guys with custom tool grinds demonstrate ...
by Kodin
Dec 13 2015 11:39pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Tank Bike - (Previously: Yet Another Genesis)
Replies: 28
Views: 6580

Re: YAG - (Yet Another Genesis)

Think I just spent half my paycheck on tooling and replacement parts for my lathes. *sigh*. New toolpost required a T-nut that fits my big lathe; Grizzly unit had a neck at the base that doesn't allow non-Grizzly toolposts to mount. I'm switching from a piston-type to a wedge-type BXA tool post. htt...
by Kodin
Dec 13 2015 5:59pm
Forum: E-Bike Technical
Topic: Definitive Tests on the Heating and Cooling of Hub Motors
Replies: 2101
Views: 396449

Re: Definitive Tests on the Heating and Cooling of Hub Motor

Madhatter, you lose efficiency with more fluid; The ~5ml amount is to bring the fluid to a light contact. As you add more fluid you add more fluid friction, which lowers your efficiency. The whole point of this is you put "just enough" to make contact, but not so much that you add more drag.
by Kodin
Dec 13 2015 5:55pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223599

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Thank you Kodin, that is a very kind offer. Iwent back and remeasured them with a fresh battery in the digital vernier and calibrated to zero first. They now measure at 2.64mm on the outside (on the insulation). I imagine the inner wire is 2mm. Can you measure the thickness of yours? Just want to m...
by Kodin
Dec 13 2015 5:44pm
Forum: E-Bike Technical
Topic: Turning 4130 - Now 4340
Replies: 11
Views: 1848

Re: Turning 4130 - Now 4340

Brake, which model do you have? Mine's the Grizzly 13x40 "Gunsmith" lathe with foot brake.
by Kodin
Dec 11 2015 9:36pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Tank Bike - (Previously: Yet Another Genesis)
Replies: 28
Views: 6580

Re: YAG - (Yet Another Genesis)

Never mind, I derped and realized the tailstock was still misaligned. Just spent at least an hour bringing it "close" to true, as well as finding a lateral misalignment of my gap bed. Gap bed is still not perfect, but it isn't enough to offset the carriage anymore like it was; I couldn't figure out ...
by Kodin
Dec 11 2015 5:53pm
Forum: Items for Sale - New
Topic: upgrade Axle set for MXUS 3000 V2
Replies: 87
Views: 12931

Re: upgrade Axle set for MXUS 3000 V2

Madin88, did you guys surface-grind your shafts or turn them on a lathe? I'll be darned if I can get anything close to the finish you got...
by Kodin
Dec 11 2015 5:47pm
Forum: E-Bike Technical
Topic: Turning 4130 - Now 4340
Replies: 11
Views: 1848

Re: Turning 4130 - Now 4340

Quick update so far: Moved from 4130 to 4340, first off... second: Ordered some new DNGG carbide inserts to try varying geometries and chip-breaker designs. The Kyocera "light finishing" inserts look pretty promising so far... https://zoom-pan-tilt.smugmug.com/photos/i-jP8JfVC/0/L/i-jP8JfVC-L.jpg ht...
by Kodin
Dec 11 2015 5:40pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Tank Bike - (Previously: Yet Another Genesis)
Replies: 28
Views: 6580

Re: YAG - (Yet Another Genesis)

Quick update so far: Moved from 4130 to 4340, first off... second: Ordered some new DNGG carbide inserts to try varying geometries and chip-breaker designs. The Kyocera "light finishing" inserts look pretty promising so far... https://zoom-pan-tilt.smugmug.com/photos/i-jP8JfVC/0/L/i-jP8JfVC-L.jpg ht...
by Kodin
Dec 11 2015 4:42pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223599

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Lurkin, what style of side covers did they ship you? Worst-case I have a spare 3mm phase wire bundle and shaft I'll be discarding when I finish building my replacement... I'm in the process of putting accurate measurements for both styles of shaft into CAD diagrams as well as confirming bearing dime...
by Kodin
Dec 11 2015 1:48pm
Forum: Items for Sale - New
Topic: upgrade Axle set for MXUS 3000 V2
Replies: 87
Views: 12931

Re: upgrade Axle set for MXUS 3000 V2

Personally I'd just take a piece of PVC that's either got the right inner or right outer diameter, and either turn or bore it to the right size so you have correct clearance. Regarding my Leafbike's brake side cover - I have two different styles of side cover. The one I want to use has a 6204 bearin...
by Kodin
Dec 10 2015 2:06am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223599

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Should be fine for that. I'd still suggest ordering the 3mm upgrade if you can and don't have a motor yet.
by Kodin
Dec 09 2015 2:16pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223599

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

I can't verify easily until Friday night; I'm out-of-state and don't have my motor parts with me.
by Kodin
Dec 09 2015 1:27pm
Forum: Items for Sale - New
Topic: upgrade Axle set for MXUS 3000 V2
Replies: 87
Views: 12931

Re: upgrade Axle set for MXUS 3000 V2

The cassette shaft is a far inferior design and pretty crap material. At least the one-off shaft Leafbike sent me was... Cuts down with a file like butter with a hot knife. I've bored out my freehub body bore and swapped to the largest bearings I can fit; should be much better now. IIRC I can fit a ...
by Kodin
Dec 09 2015 1:22pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223599

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

This won't be a group buy thing; I'm machining my own from scratch.
by Kodin
Dec 08 2015 8:57pm
Forum: E-Bike Technical
Topic: Definitive Tests on the Heating and Cooling of Hub Motors
Replies: 2101
Views: 396449

Re: Definitive Tests on the Heating and Cooling of Hub Motor

I bought a tube of the synthetic, but I'm still in the process of re-engineering my motor before I even mount my motor to a frame. ...which I also have to finish building.
by Kodin
Dec 08 2015 5:55pm
Forum: Items for Sale - New
Topic: upgrade Axle set for MXUS 3000 V2
Replies: 87
Views: 12931

Re: upgrade Axle set for MXUS 3000 V2

I'm thinking of building something of a similar design for my Leafbike 1500W motor. I'd planned on turning a new shaft out of 1.5" 4340 I have lying around, however the one item that really bothered me was how to drill the through-hole for the wires. I didn't want to have to burn through a bunch of ...
by Kodin
Dec 08 2015 5:41pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223599

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

In my case I got the 3mm phase wire setup, and the hole in the shaft is larger by a couple mm. In comparison, the freehub shaft they sent me was designed for 2mm phase wires and the hole is smaller. I'm just thinking it's better to forego a through-hole and put a slot instead to set the wires flat a...
by Kodin
Dec 08 2015 3:59pm
Forum: Items for Sale - New
Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
Replies: 1340
Views: 268914

Re: QS MOTOR 500W-16kW(Rated) BLDC In Wheel Hub Motor Index

Hi Vito, Any plans to include support for a "cassette" freehub side cover on these instead of a freewheel threaded mount? https://zoom-pan-tilt.smugmug.com/photos/i-dJFVmpH/0/L/i-dJFVmpH-L.jpg I'd be perfectly happy to build a bike with 150mm or larger dropouts if I could find a high-powered motor w...
by Kodin
Dec 08 2015 3:40pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223599

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

I'm tempted actually in my current build to design my shaft to not have a through-hole drilled and instead mill a slot like the upgraded MXUS shafts use. It'd definitely let me feed larger diameter phase wires through with a minimal reduction in shaft thickness. Any thoughts on this? If I include a ...
by Kodin
Dec 08 2015 3:19pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Tank Bike - (Previously: Yet Another Genesis)
Replies: 28
Views: 6580

Re: YAG - (Yet Another Genesis)

Just an update for those who have been following this build thread: New edits and pictures with progress in original post. Started cutting the 4340 on the lathe, waiting on a new tool post to complete the work. May also get around to cutting my spare hockey pucks to make levelling feet and properly ...
by Kodin
Dec 08 2015 3:12pm
Forum: Motor Technology
Topic: Using leafmotor/leafbike 1500w as mid-drive motor?
Replies: 40
Views: 5306

Re: Using leafmotor/leafbike 1500w as mid-drive motor?

You could also ask a cop to radar you if they've got nothing better to do... Just run it at 10 mph and ask him to verify so you can get your speedo calibrated; most nice cops will be happy to help you get accurate readings so you don't inadvertently break the law. Also, if you guys want more pics of...
by Kodin
Dec 06 2015 6:53am
Forum: E-Bike Technical
Topic: Definitive Tests on the Heating and Cooling of Hub Motors
Replies: 2101
Views: 396449

Re: Definitive Tests on the Heating and Cooling of Hub Motor

Stronger magnet works, but keep in mind these are strong magnets anyway; watch your fingers and wear safety goggles when you do it in case the magents crash together; I've seen magnets "stick" hard enough to shatter and send shards flying. I'd start with a cotton rag, and one that you don't mind bei...