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Old 10-24-2017, 07:48 PM   #11
dundeebarnbuggy
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Default Re: Split lock washers

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Originally Posted by dacheedah View Post
Excellent design. Betcha Walmart and the like don't carry those! I wouldn't use them on batt posts though as we don't torque the studs to nearly the specs required for the washers to bite into the nut.
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Old 10-25-2017, 07:08 AM   #12
Tom47
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Default Re: Split lock washers

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Originally Posted by HBR View Post
I have had electric carts for around 15 years. Many of the paths are quite bumpy with the tree roots pushing the asphalt up. I have only ever used plain stainless nuts and have never had one come loose.
Good point!

I never even get a minor rotation when I check battery terminal connections. Even those with multiple terminals under the nut.

By the way, I never use a wrench or socket to tighten battery terminals.

I use a Klein long shank nut driver. You get much better control to prevent the terminals from turning and will have less chance of over tighten the nuts.
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Old 10-25-2017, 08:00 AM   #13
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Default Re: Split lock washers

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Originally Posted by dundeebarnbuggy View Post
Excellent design. Betcha Walmart and the like don't carry those! I wouldn't use them on batt posts though as we don't torque the studs to nearly the specs required for the washers to bite into the nut.
LOL yes Walmart does have them

https://www.walmart.com/ip/NORD-LOCK...&wl13=&veh=sem
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Old 10-25-2017, 08:17 AM   #14
Sergio
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Default Re: Split lock washers

Those nord-lock washers are definitely impressive, but this is the "Junker" test used on the video (from their site):



If your cart vibrates at 40Hz, even your belly button may come loose
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Old 10-25-2017, 08:40 AM   #15
scottyb
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Default Re: Split lock washers

Been using Nord Lock washers for years to keep the small 2 stroke engines in our airplane models - they work very well.... so do similar (uncut) spring washers. I just bought a grip of them for the 136 fasteners on my Lithium pack
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Old 10-25-2017, 08:47 AM   #16
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Default Re: Split lock washers

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Originally Posted by scottyb View Post
Been using Nord Lock washers for years to keep the small 2 stroke engines in our airplane models - they work very well.... so do similar (uncut) spring washers. I just bought a grip of them for the 136 fasteners on my Lithium pack
Since your lithium pack unlikely has studs embedded in lead, the nord-lock washer will work fine.

Scottyb, did you get a different current shunt than the 300amps on that BMS listing?
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Old 10-25-2017, 09:16 AM   #17
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Default Re: Split lock washers

I'm not sure, I'll ask my battery guy. You are thinking that may be a little small?
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Old 10-25-2017, 09:37 AM   #18
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Default Re: Split lock washers

It will depend on how big of a Controller and how You set it up, but I am guessing You will have it set for "wild" mode.

Since the BMS is using the shunt to keep track of AH in/out of the pack in order to provide the SOC reading, it needs to handle the max current you plan to discharge from the pack.

The listing said 300amps shunt, but it did not say at what voltage: 50mV, 75mV or 100mV.

So if the BMS has adjustable parameters for the shunt and the shunt is a 300amp@50mV, You could program it as:
450 amps @ 75mV
600 amps @ 100mV
Sorry to get off track on this thread.
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Old 10-25-2017, 09:59 AM   #19
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Default Re: Split lock washers

We'll talk about that later when I learn more about this unit... and get set up. Right now I think we should try to stay on topic - lock washer.
Don't underestimate the effectiveness of a good serrated truss head bolt
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Old 10-28-2017, 12:42 AM   #20
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Default Re: Split lock washers

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Originally Posted by crash test dummy View Post
they are shipped from Trojan with new batteries


http://www.buggiesgonewild.com/elect...l-washers.html
I always use Trojans ..... Stainless huh , So then there reusable

EDIT: . opps , sorry I was just reading the thread where everyone was joking around about Nuts
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