For Sale: Nissan LEAF EM57 Motor adapter plates

8824 Views 27 Replies 11 Participants Last post by Electric Land Cruiser, 11 mo ago

Electric Land Cruiser

Discussion Starter · May 19, 2021 (Edited)

4

For sale I have 3 adapter plates machined to fit a Nissan LEAF EM57 electric motor. These adapter plates were machined to match the CAD model posted here: For Sale: em57 leaf motor couplers To be used with that coupler shaft.

6061 Aluminum. Machined with .004" tolerance (+/- .002").

It is machined to accept this bearing: SKF

These plates are .875" thick which is slightly less than the 1" spec'd by the model. This will mean the bearing will sit proud slightly, but shouldn't affect function at all.

Price $400 + shipping. Please PM if interested. Thanks for looking!

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wapalco

· #2 · May 20, 2021

I am interested but new to the forum so not allowed to pm you. Could you email me?

jason at wap alco dot com

Reactions: 1

Electric Land Cruiser

Discussion Starter · #3 · May 20, 2021

Emailed!

Electric Land Cruiser

Discussion Starter · #4 · May 24, 2021

3 left!

electro wrks

· #5 · May 24, 2021 (Edited)

It will be interesting to see if the short, relatively small diameter Leaf motor shaft can handle the load reversal forces from the inertia of a flywheel, if one is used. This might be from abrupt switches to regenerative braking or reversing the vehicle. The input shafts of transmissions are about the same diameter. But, because the input shafts are much longer than shaft on the Leaf motor, they are better able to absorb the forces by twisting slightly like a torsion spring.

Also, it might be necessary to use a double row, angular contact bearing like this: SKF, to handle vibration or movement of the flywheel in addition to the clutch disengagement forces.
EDIT: If the bearing needs seals, this is that bearing: SKF . Although the seals limit the normal max RPM to 5600. What is the max rpm of the Leaf motors?

Reactions: 1

brian_

· #6 · May 24, 2021

electro wrks said:
... If the bearing needs seals, this is that bearing: SKF . Although the seals limit the normal max RPM to 5600. What is the max rpm of the Leaf motors?

Over 10,000 RPM.

Electric Land Cruiser

Discussion Starter · #7 · May 24, 2021

At least in my build there will be no flywheel on the output side of the motor. The designer of this adapter plate used an electric motor drive coupling that has nylon or rubber dampers I believe. I think this plate is a great design to use for any number of drive combinations, including a boat outboard motor as I know one person is doing!

Electric Land Cruiser

Discussion Starter · #8 · Sep 4, 2021

3

I still have 3 plates left. See photos below for test for with Bratitude's shaft adapter (note: no bearing installed yet).

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Electric Land Cruiser

Discussion Starter · #9 · Oct 9, 2021

3

Here are some more photos of the adapter plate and my custom driveshaft using the coupler. I used this sealed bearing: https://amzn.to/3Dps4UF

I tapped holes for mounting brackets. I wish I could weld aluminum then there would be even more possibilities. As is I'm really happy with this plate as a blank canvas. With the 10mm dowels and bearing everything just fit together perfectly. Really spot on.

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Bratitude

· #10 · Oct 9, 2021 (Edited)

This looks great, glad to see the coupler and the adapter plate design is working out so far.

but the designs are not for commercial reproduction. I wasn’t asked if you could make and sell them.
I’m trying to bring new products and designs to the community in a open fashion to break down the barriers and cost for folks. This takes time and money, so please ask and credit properly

Electric Land Cruiser

Discussion Starter · #11 · Nov 30, 2021

3

For the record I did contact @Bratitude via email through the same channel that I purchased his shaft adapter and started the conversation about reproducing and selling my copies. I asked him who made the 3D model and I told him I was planning to make extras to sell in order to cover my costs. He never replied. I PMed him and he claims he never received it. Either way I tried and it took him nearly 8 months to get back to me and in a confrontational manner. He PMed me and I am just now seeing that he also posted this publicly in this thread. Please see the below screenshot as proof of my good-faith email.

I still have 3 of these plates for sale. I am lowering the price to $400 + shipping. That is a steal and you can't have one made for twice that. I made extras because I had purchased the material and it was basically the same cost to have the duplicates machined out. I want to empower people to build DIY EVs and I think the Nissan LEAF platform is an amazing jump-start to building your own EV. Check out my build I am using one of these plates: The Electric Land Cruiser EVJ80 - Nissan LEAF + Resolve-EV

The reason I needed the plate was to make a mounting face that I could bolt to as I stripped the LEAF motor of the inverter and gearbox.

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remy_martian

· #12 · Nov 30, 2021

How is that a "design"?

No bearing lubrication/cooling in a 250kW 10,000 RPM application and uses a bearing that resists pull but not push thrust loads when you have a slip yoke attached.

Carry on, children.

Reactions: 1

Bratitude

· #13 · Dec 1, 2021

remy_martian said:
How is that a "design"?

No bearing lubrication/cooling in a 250kW 10,000 RPM application and uses a bearing that resists pull but not push thrust loads when you have a slip yoke attached.

Carry on, children.

Motor is running at 80kw, and spinning no more than 8000rpm.

Is there a bearing you recommend better suit for his application?

evVanagon

· #14 · Feb 2, 2022

@Electric Land Cruiser - Is it still possible to get one of these plates?

Electric Land Cruiser

Discussion Starter · #15 · Feb 2, 2022

torrin said:
@Electric Land Cruiser - Is it still possible to get one of these plates?

Yes! I still have 3 available. I sent you a PM to exchange details.
Thanks!

evVanagon

· #16 · Feb 2, 2022

@Electric Land Cruiser

I see you mentioned the SKF 6208 2RSJEM bearing later on in your thread after posting about the 7208-BEP originally in the first message. Why? The 6208 bearing is $122 cheaper than the 7208 for me.

Electric Land Cruiser

Discussion Starter · #17 · Feb 2, 2022

torrin said:
@Electric Land Cruiser

I see you mentioned the SKF 6208 2RSJEM bearing later on in your thread after posting about the 7208-BEP originally in the first message. Why? The 6208 bearing is $122 cheaper than the 7208 for me.

The 6208 version is sealed, otherwise the same I believe. Being sealed I think it'll live longer. They are only $28 on Amazon: https://amzn.to/3ggFSqY

Electric Land Cruiser

Discussion Starter · #18 · Feb 2, 2022

Only 2 adapter plates left!

oudevolvo

· #19 · Feb 3, 2022

Electric Land Cruiser said:
The 6208 version is sealed, otherwise the same I believe. Being sealed I think it'll live longer.

Sealed often has a much lower max RPM. From memory the 7802-BEP is 10.000 rpm, whereas the 6208 is 5600 rpm I believe. So it depends on your application.

rishimaze

· #20 · May 30, 2022

I'll take both! ;P

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