Intro to the Small G310 / G311 Silent Geared Hub Motors
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- Опубликовано: 21 авг 2024
- This video describes some of the key features of the Bafang G310 (rear) and G311 (front) hub motors that have been flying off our shelves this summer.
The combination of light weight, small diameter, excellent bicycle fitment, and silent drive make them one of our favorite motors at the moment for ebike applications where only moderate power levels are needed.
For additional information on this motor series, see
www.ebikes.ca/p...
We have them for purchase as part of a kit package here
www.ebikes.ca/s...
I really love this motor that represent all i need. Silent light and quiet powerfull. Thanks for your vidéo. I try to buy one but its hard to find on the net.
Was curious if you could do a sample/demo of all your motor sounds for comparison?
The G311 front hub sounds like it might be the minimalist solution I need for neutralizing the excess weight of my new Hase Lepus trike / Rohloff Speed-drive / differential. Torque no higher than 40nm should be good enough for me and should minimalize tire spin. I don't want to turn the trike into a full-blown e-trike. For me, "assist" means "assist," and that I can leave the battery at home when I want to.
Little Silent POWEEEER.... “EAT MY DUST” Hahahahah
Lol!
Hey downunder!
velosRus dotcom
Outstanding Description!
Spot On.
Super super cool motor.
For me is much important parametrs max efficiency on wheel and weight, not noise (noise is not big, and then is noise you and people known, that motor working).
Not sure if this has a clutch but I think motors need to offer the most pedal efficiency so you can carry small battery and use human power half the journey.
They do have a clutch so when pedaling without assist there is almost no difference from riding a regular bike other than the small additional weight. So for people who want a bike that is often used under pedal power only this motor is a great choice. For people who really depend on the assist a lot, then we'd normally suggest a larger and more powerful hub.
Hi, I have one of these, but hadn't heard about the three winds before. Do you know if the wind be identified from the number on the case (FM G311. 250.D 13 008F2S6260490)? Thanks, Matt
Bafang themselves can be very obtuse about actual winding details. Ours our wound with 7, 8, and 10 turns respectively. It's possible that the 13 in your serial number refers to a 13 turn winding which is slower than any we deal with. If that's the case and you wanted to use our simulator you'd choose what we call the standard wind option, and then use the KV adjustment slider to set to 0.77 to simulate your slower 13T winding. You can know for sure by just running the motor unloaded at a known voltage and clocking the RPM.
what is approximate price?
Nice! I so want to pair this with your brilliamt Ligo batteries, but you aren't selling it in 36V anymore. Augh!!
I don't quite follow that. The LiGo's are still 36V, and the G310/G311 motors work just fine with 36V battery packs. With the Baserunner Z9 controller you can use anywhere from 24V up to 52V nominal packs with this hub.
It is June of 2020 any updates on the motor? Price? Batteries? Availability?
The info is in the video description if you click to expand it and then follow the links toward the end.
www.ebikes.ca/product-info/geared.html
Motors are still in production and still readily available both laced and as bare hubs.
nice!
Why can't I find this exact motor at Aliexpress? Do they designate a different OEM part number for G310/G311? As much as I like to order this from Grin. The shipping cost to my country is insane. China is geographically closer. So shipping costs for me is cheaper.
Are there versions using graphene coated or carbon nanotube windings instead of heavy overheating copper?
To replace my old motor.. Will I have to change my spokes to fit this into my ancheer 26in ebike?
Wonder if this motor would be compatible with the ebikemotion x35 system.
Hi sir, I don't know what spoke can be used for the hub electric rim 700c
Are the H400 the same motors? I have a Kuma R1 that comes with it. Could find much about the H400 but it's apparently a marketing code for the G312. I'm trying to find a way to remove the 25kph speed limit, at least to 32. But it just looks impossible without getting a whole new display and controller.
What's wrong with getting a new open standard motor controller?
@@GrinTechnologies Costs money and my bicycle have it all integrated. No way to replace it and not make it look terrible.
Well, in that case you are into the digital realm of controller parameter interfaces and encrypted communications usually, it's not really our domain. There are ways of hardware hacking a speed limit though, like if your hub motor has a 6 pole magnet encoder for the wheel speed, then physically remove 3 of those magnets and it will think the bike speed if half what it is. That won't work though if the controller is relying on a motor RPM limit as opposed to a hub shell limit.
Anyways these are some of the downsides of buying a factory ebike with all the stuff integrated.
@@GrinTechnologies My bike was such a bargain, some chap bought it and never used it (it has an odometer so I know it's true). So I'm ok with it either way. I'm trying next week when I get back to my home if it works to decrease the wheel size in the settings to trick the speed sensor.
I appreciate you replying though.
so how well does it fit in 142mm rear dropouts? 138 is not any standard ... so strange.
142 is a thru-axle standard, not a slotted dropout standard. This motor is meant to fit in with all the 135mm dropout bikes which is by far the most common still. The spread of 1.5mm on either side to get it in is really inconsequential, you don't need to cold set the frame or anything like that, it's easily opened up by hand to fit the hub in.
I like it😊 good call on the gears. How many km before a change? 😊
You don't need to change the gears as a matter of course or regular maintenance, but you will need to chance them if you put too much torque on the motor and cause the gears to strip. Our experience is that this can easily happen at around 60 Nm. Best to have a controller phase current limit or choice of battery voltage and motor winding such that the actual motor torque doesn't exceed about 40Nm if you want to play it safe and ensure trouble-free gears.
@@GrinTechnologies sure that's a perfect amount of torque considering most 1000w-1500w only have around 20-25nm of torque. So your saying if you keep it at 40nm you should get 10,000km+ with no issues?
Thanks for replying, its good to get the info out there😊
No, that's not what I was saying. There is another matter of motor overheating which would certainly be a problem if you ran at 40Nm continuously. Please familiarize yourself with our trip simulator web app here that has the full thermal models for all of these hubs properly simulated:
www.ebikes.ca/tools/trip-simulator.html
It's important to differentiate mechanical limitations from thermal limitations, although they are linked in that at elevated temperatures the nylon gear material looses strength and would fail at a lower torque level.
@@GrinTechnologies ah cool thats some good information, thanks again, and ye do some great motors. I use one in both my bike😊 the older one has 14500km on it with no issues 👍🏼
Sotasizmi
Make a rear through axle motor
Someday! Unfortunately much as we like these little motors there's no way to make them properly thru-axle, as the middle of the motor has the critical rotor and small diameter sun gear in the way.
@@GrinTechnologies make a big motor
Price
Could you convert a G311 to a rear hub down the road?
Unfortunately no, they have very different axles in them. The motor internals are similar, but not quite close enough.
The only thing that they have in common is the actual motor and gear cluster. The motor housing, hub shell, axle etc. are all different between the front and the rear, and to get the parts to do a swap you might as well just get the new rear motor. Especially since you have to desolder and resolder the cable harness from the hub windings and hall sensors in order to change that hardware around.
IM UZBEKISTAN
Bafrang rear motor has need to remove his limit 25kmh ,any tips?