Bafang M500/M600 thread

Discussions related to motors other than hub motors.
This includes R/C motors, botttom bracket, roller and geared drives.
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Kepler   1 GW

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Re: Bafang M500/M600 thread

Post by Kepler » Oct 02 2019 1:28am

As this is the M600 dedicated thread I have added my partial tear down notes and video.

Completed the partial strip down of the drive so as to inspect the gears and check the level of lubrication.

The drive came apart quite easily with no special tricks needed.

I can confirm the drive has metal gears throughout. The intermediate gears certainly could have done with more lubrication however it certainly wasn't dry. The final drive gears looked to be lubricated adequately.

This first picture shows the speed controller. A really neat compact unit. Not potted though so water ingress could be an issue. That being said, there is a nice fitting gasket on the cover. Worth noting this drive doesn't look like it uses traditional hall sensors. Instead it has a single magnet on the end of the motor pinion gear which is located behind the shinny circular post just behind the 3 phase plug. This means you will need to take care refitting the speed controller cover as I presume there is a sensor on the speed controller circuit board that picks up a pulse from this magnet.
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Yo can see the final reduction gear in this picture. Looks to be well lubricated. The bearing setup looks to be well engineered.
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On the left is the secondary gear reduction. The gear on the far left is the steel gear that replaced the original nylon gear.
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This picture shows the cavity which the intermediate gear reduction fits into. Looks like you could pack a good amount of grease on the intermediate gears without the issue of grease spilling out. You can also see the magnet on the end of the motor pinion used to sense rotation.
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aCeMadMod   1 kW

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Re: Bafang M500/M600 thread

Post by aCeMadMod » Oct 02 2019 4:06am

Hi great work over the years

It just needs after market ti gears and mag case . Ti axle
You have a winner to me .

Up grade power too.


I buy one next. Soon can i work how to plug in a big vesc


Thank you

Tom   100 W

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Re: Bafang M500/M600 thread

Post by Tom » Oct 03 2019 1:46am

EBR reviewed the M2S All Terrain M600 FS... "the high quality components match the $3,499 price well." LMAO, what are they smoking?

https://electricbikereview.com/m2s-bike ... n-m600-fs/

2old   100 kW

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Re: Bafang M500/M600 thread

Post by 2old » Oct 03 2019 6:53am

He chrges to review the bikes, so don't expect anything critical; it's more like an infomercial. SunTour forks on a $3500 bike??????

Animalector   10 kW

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Re: Bafang M500/M600 thread

Post by Animalector » Oct 03 2019 7:13am

The top end Suntour suspension is actually pretty good and comparably priced to Rockshox ( the Durolux for example).. but they didn't use Durolux... So you're right...

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Re: Bafang M500/M600 thread

Post by jimmyN » Oct 04 2019 10:05am

Wow! That’s 15 minutes I’ll never get back. The guy’s on a new F.S. E-bike and he chooses to review it on a flat trail in a couple of gears? What a disappointment.

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Deafcat   100 W

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Re: Bafang M500/M600 thread

Post by Deafcat » Oct 08 2019 3:14pm

Great research so far guys, glad to see we have affirmative answer on the crank spline (WTF why did they change from Isis, an open standard??)

Also awesome pics and video of m600 internals. Kudos!

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Re: Bafang M500/M600 thread

Post by overdrive » Oct 10 2019 5:25am

Hi,
i nearly finished my M600 build (will make an separat thread for this) but I miss two parts.

The bash guard, i got the one from dengfu with the motor but it dosent fit with my frame. There are two version, 520A and 520B.
I have the 520B for the dengfu frame but i need the 520A.

The ebrake cable for the M600.

Dengfu wont help me to get this parts.

Does anyone have some info or connection to get m600 spare parts?

regards

MikeE   1 µW

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Re: Bafang M500/M600 thread

Post by MikeE » Oct 10 2019 5:37pm

thanks for your awesome M600 tutorials, they are invaluable to a new user (like me)
Can I ask what style/brand of tool you used on the chainring spider lockring? It needs a "deep" tool to clear the end of the axle.
Mike Eatough

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Re: Bafang M500/M600 thread

Post by cscscs » Oct 10 2019 8:13pm

Nice to see the Primary gear assembly is fitted with a sprag instead of the pawl-type used in the G510 (Ultra) - that is a big improvement. The wire management and controller connectors also look much improved. I've not been able to find a picture showing the wiring and connectors exiting the motor for connection to the battery, display, speed sensor etc as those are a PITA to work with on the G510. Got pics of those? Thanks for the teardown pics and video!

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Re: Bafang M500/M600 thread

Post by cscscs » Oct 14 2019 7:17pm

Leeleeducati wrote:
Sep 24 2019 8:43am
Bafang spline and ISIS spline are not compatible.
What the heck? Why on earth would Bafang do that? What is the length of the stock M600 cranks?

I've got a G510 (Ultra) equipped bike and the stock cranks were the worst - 175mm long with a ridiculous amount of unnecessary material outboard of the spindle bore making them effectively almost 200mm long with the result that they stuck out like the proverbial sore thumb - swapping them out for some Miranda 155mm cranks was the best upgrade I made to that bike.

That limitation could be a deal breaker for me which would be a shame cuz the M600 looks otherwise like a well-designed unit for eMTBs.

Leeleeducati   100 W

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Re: Bafang M500/M600 thread

Post by Leeleeducati » Oct 15 2019 1:30pm

The ones I received with my M600 are 170mm. Can't tell from the photos, but center to center looks to be true 170mm.
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waynebergman   10 kW

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Re: Bafang M500/M600 thread

Post by waynebergman » Oct 15 2019 3:13pm

Yes, its a shame these can not be had in 160mm. I think for this bike a shorter crank arm would better. Not so easy to have new holes and also have them tapped for new placement as the left hand thread for one side makes for a pricey order. Also if one wanted to shorten these arms and have new holes you may have to go with a 155mm spacing to allow enough casting on the arm outbound of the hole placement. The crank arms are kind of clunky compared to the motor that is for sure. Not sure if its feesable for new tapped hole placement as this will sadly cost us. :( ....wayne

Marmalade   100 mW

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Re: Bafang M500/M600 thread

Post by Marmalade » Oct 16 2019 4:44pm

Wondering if it would be possible get the cranks undrilled. There's probably enough metal there to move the pedals 10mm inboard and cut the excess length off. Definitely need to be shorter.

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waynebergman   10 kW

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Re: Bafang M500/M600 thread

Post by waynebergman » Oct 16 2019 6:30pm

Marmalade it will be pricey for sure and you would need to change the spacing by more than 10 mm that is for sure. One more good reason to ride with a throttle on this bike :)

cscscs   100 mW

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Re: Bafang M500/M600 thread

Post by cscscs » Oct 17 2019 11:10am

Would cutting out a piece from the midsection and welding back together an option? Any ideas why Bafang would choose a proprietary spline? Maybe they will revise that design if they realize it is a mistake.

unterhausen   10 µW

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Re: Bafang M500/M600 thread

Post by unterhausen » Oct 19 2019 7:22am

It's really disappointing they went with a proprietary crank. Probably saves them money somehow. And OEMs and most of their customers most likely are not going to care. I'm sure OEM sales are much more common.

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Deafcat   100 W

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Re: Bafang M500/M600 thread

Post by Deafcat » Oct 25 2019 4:01pm

No, you cannot (rather, should not) cut+weld a bike crank, it will be seriously weakened metalurgically. Cranks are typically forged heat treated for max strength for their size and shape, welding will take lots of that strength away (leading to bending and eventual failure around the weld from riders weight and load).

Unlikely you can get them un-drilled and tapped. Very unlikely.

Best bet, contact Miranda parts company and see when they will have an aftermarket option available, I would imagine they have it on their radar since they cater to ebike parts.

Manufacturing replacement cranks to bafang spline is the only decent option I see. Thermonuclear option ($$$) would be to metal print new cranks on a Markforged Metal X, they make some damn fine components.

For me, it's definitely a massive turn-off and I will not consider adopting their crank standard, or using M600 in any build until either they revise to industry standard, or somebody makes a crank... I would not switch back to 170mm mid-drive ebike cranks now that I've been loving the 152mm Mirandas on my G510.

From manufacturing/engineering perspective, I have no goddamn clue or good excuse on Bafangs behalf for making this change. Stupid!

aCeMadMod   1 kW

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Re: Bafang M500/M600 thread

Post by aCeMadMod » Oct 25 2019 4:28pm

Hi way i do by add the 10mm you need by add steel. Unless you have Ti.

Dont weld..



You need to find a nice look nice. Or make a new cranks

Good luck

ilegal   10 µW

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Re: Bafang M500/M600 thread

Post by ilegal » Oct 27 2019 7:36am

overdrive wrote:
Oct 10 2019 5:25am
Hi,
i nearly finished my M600 build (will make an separat thread for this) but I miss two parts.

The bash guard, i got the one from dengfu with the motor but it dosent fit with my frame. There are two version, 520A and 520B.
I have the 520B for the dengfu frame but i need the 520A.

The ebrake cable for the M600.
I have the same problem. I need the brake cable, but can´t find anyone selling it.
Also looking for shorter crank arms, no luck.

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El_Topo   1 W

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Re: Bafang M500/M600 thread

Post by El_Topo » Oct 30 2019 5:00pm

Leeleeducati wrote:
Sep 24 2019 8:43am
Bafang spline and ISIS spline are not compatible.
Very disappointing, thanks for reporting.

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Re: Bafang M500/M600 thread

Post by overdrive » Nov 02 2019 2:18pm

I am working in it to get the brake cabel which are compatible with the yellow higo plugs.
I will inform you asap it is available.
Are there more people around here who want to have this cable?

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Re: Bafang M500/M600 thread

Post by dh_newbie » Nov 04 2019 11:11am

El_Topo wrote:
Oct 30 2019 5:00pm
Leeleeducati wrote:
Sep 24 2019 8:43am
Bafang spline and ISIS spline are not compatible.
Very disappointing, thanks for reporting.
I have see some people who is using the Sram EX1 crankset in the Bafang motor?
https://www.youtube.com/watch?v=pL15d05SkfY

Leeleeducati   100 W

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Re: Bafang M500/M600 thread

Post by Leeleeducati » Nov 05 2019 11:31am

overdrive wrote:
Nov 02 2019 2:18pm
I am working in it to get the brake cabel which are compatible with the yellow higo plugs.
I will inform you asap it is available.
Are there more people around here who want to have this cable?
Let me know if you have a source for that ebrake cable that plugs into port #2? I’d be interested in one. Thanks.

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Re: Bafang M500/M600 thread

Post by Procomprev » Nov 09 2019 5:20am

Hi,

I am thinking of changing my m400 to m600. A question in relation to m600 motor, the size and fitting is is the same as m400? See attached fitting on my city ebike. Will it fit what should I consider a new motor? Many thanks.
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