Botvac problem.. You have too see this

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Botvac problem.. You have too see this

Postby 3kgt » June 25th, 2014, 6:12 pm

Well i almost couldint beleave my eyes when i saw this
See pictures
Now this is a new unit wich is almost 1 month old wich was at my parents
The botvac did clean 4 times a week
And they did clean the dust bin after every usage, but cleaned the brushes/bearing once a week.
and this is what happened 8-)



[attachment=-1]20140619_193944.jpg[/attachment][attachment=-1]20140619_193928.jpg[/attachment][attachment=-1]20140619_193916.jpg[/attachment][attachment=-1]20140619_193854.jpg[/attachment][attachment=-1]20140619_193845.jpg[/attachment][attachment=-1]20140619_193914.jpg[/attachment]
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uploadfromtaptalk1403734210080.jpg
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uploadfromtaptalk1403734183755.jpg
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uploadfromtaptalk1403734053450.jpg
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Re: Botvac problem.. You have too see this

Postby vic7767 » June 25th, 2014, 8:08 pm

It is now very well known that the shielded ball bearing installed on the Botvac cleaning brush will fill with debris, seize up and fail to spin. If not noticed in time the plastic will heat up from the friction of the non functioning bearing and self destruct. Now instead of just replacing the shielded ball bearing with a rubber sealed bearing, you have to purchase a complete new brush.
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Re: Botvac problem.. You have too see this

Postby powersteer » June 26th, 2014, 1:47 am

is the bearing on the other end (motor) prone to seizing too? are we able to replace that?
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Re: Botvac problem.. You have too see this

Postby 3kgt » June 26th, 2014, 7:21 am

Nehh didnt replace it..my parents got a ful refund.

Sad part this morning i saw that the little 3 pins wich hold the bearing one of them is brokeb on mine.. and i have replaced my bearing and do clean it after every run
In my opinion i think they should have a metal part on that end of the brush
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Re: Botvac problem.. You have too see this

Postby third_deg » June 26th, 2014, 8:51 am

Still shocked they have this design. Even the most basic of internet searches would have revealed how this was a major flaw when iRobot made this mistake many many years ago.

At least in iRobot's case the robot was modular, and effected parts could be swapped out.
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Re: Botvac problem.. You have too see this

Postby vic7767 » June 26th, 2014, 9:31 am

powersteer wrote:is the bearing on the other end (motor) prone to seizing too? are we able to replace that?


It is possible but a lot of dis-assembly is required and a sealed bearing is added to the plastic collar portion of the brush motor assembly.
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Re: Botvac problem.. You have too see this

Postby mfortuna » June 26th, 2014, 9:35 am

These are quantity 1 bearing prices (I just picked a size I have used)

http://www.bocabearings.com/productDeta ... ?ItemID=13

http://www.bocabearings.com/bearing-inv ... -5-MR852GS

The sealed bearing costs a whopping 18% more than the shielded version. In the quantities Neato uses I would expect the bearing to cost much less. If the sealed was a $1.18 and the shielded was $1.00 why not spend 18 cents a unit for better protection? That adds less than $1 to the retail price.
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Re: Botvac problem.. You have too see this

Postby powersteer » June 26th, 2014, 10:22 am

vic7767 wrote:
powersteer wrote:is the bearing on the other end (motor) prone to seizing too? are we able to replace that?


It is possible but a lot of dis-assembly is required and a sealed bearing is added to the plastic collar portion of the brush motor assembly.


Thanks vic7767, are these the same size as the ones on the other end? I'm making a trip down my neighbourhood shop for new SKFs tomorrow.
Last edited by powersteer on June 26th, 2014, 10:27 am, edited 1 time in total.
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Re: Botvac problem.. You have too see this

Postby powersteer » June 26th, 2014, 10:24 am

mfortuna wrote:These are quantity 1 bearing prices (I just picked a size I have used)

http://www.bocabearings.com/productDeta ... ?ItemID=13

http://www.bocabearings.com/bearing-inv ... -5-MR852GS

The sealed bearing costs a whopping 18% more than the shielded version. In the quantities Neato uses I would expect the bearing to cost much less. If the sealed was a $1.18 and the shielded was $1.00 why not spend 18 cents a unit for better protection? That adds less than $1 to the retail price.


strange mate, why are yours only 5 x 8 x 2.5mm?
Last edited by powersteer on June 26th, 2014, 11:14 am, edited 1 time in total.
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Re: Botvac problem.. You have too see this

Postby mfortuna » June 26th, 2014, 10:49 am

I could have been more clear, I just picked a bearing size I have used in the past, not a Botvac bearing. Just looking for the price difference.
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Re: Botvac problem.. You have too see this

Postby vic7767 » June 26th, 2014, 11:27 am

powersteer wrote:Thanks vic7767, are these the same size as the ones on the other end? I'm making a trip down my neighbourhood shop for new SKFs tomorrow.


There is no need to replace the bearing on the brush motor, however the mod I did involved adding another 8x16x5mm 2RS sealed ball bearing into the brush motor mounting to block the entry of debris on that end of the Botvac cleaning assembly. This mod is not for the average Botvac owner. Only hardcore hackers should attempt this type of mod.

The other end of the Botvac cleaning brush has the 8x16x5mm ZZ shielded bearing that is just pressed onto the brush shaft and is easily replaced by using a pocketknife blade to aid in prying it loose from the brush shaft. Then install an 8x16x5mm 2RS Sealed bearing. Check my websites for more into.
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Re: Botvac problem.. You have too see this

Postby 3kgt » June 26th, 2014, 4:30 pm

Oki guys..
First i will attach some pictures showing the broken pins on the brush head wich i have use some super glue on just for now!

Then i now have an ide to modify the brush.. But have not done it yet cause i wanna have a nother replacement brush now in case this goese wrong!

Its actually 2 ides..
The first is to put a screw between the 3 pins, so it gets stronger and holds them in place and takes away some of the pressarue

The Secound ide is to remove the 3 pins and put either a metal round bigger screw wich you can directly fit the bearings on, or put some plastic round "thing" wich holds the bearing wich i will attack with a screw later.. Now the big screw would be better, but i havent yet found one that size.. will do some shopping later
Attachments
20140626_214753.jpg
The Broun plastic will be cut to fit the brush later.
20140626_215050.jpg
Fit a screw between the 3 pins
20140626_213548.jpg
Broken pins on the head..Super glued
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Re: Botvac problem.. You have too see this

Postby powersteer » June 26th, 2014, 9:11 pm

Hey everybody,

thanks for sharing! I will get an extra set of bearing for the motor end while i'm at the shop today. Hopefully i finds enough motivation to pry the motor end open ;)

This is what i'm getting later http://www.skf.com/sg/products/bearings ... rial=false solid oil version which hopefully keeps the lubrication in better :D

the 3-pin bearing holder on the brush looks weak. Perhaps i will strengthen mine by filling the valleys of the 3-pin using http://sugru.com/about or perhaps something like epoxy that will cure to a more hardened state

meanwhile, be sure to remove that bearing for regular cleaning. Took mine off yesterday and boy, the gap between brush and bearing was filled with hair, carpet materials and oil. Seem like the shielded bearing from Neato is also having difficulties keeping the oil in, that will accelerate wear
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Re: Botvac problem.. You have too see this

Postby glnc222 » June 28th, 2014, 3:14 pm

Still shocked they have this design.

Like there's gambling in Casablanca?
Who makes these decisions, engineers or management? Or is it another frozen O-ring case?
Don't let 'em near any aircraft.
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Re: Botvac problem.. You have too see this

Postby powersteer » July 7th, 2014, 5:22 am

Bearing isn't the sole reason. Even with my sealed bearing, my botvac is still attracting tangles in the gap between bearing and brush.

someone have to re-design this brush with some sort of shield to stop hair-like objects from entering
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Re: Botvac problem.. You have too see this

Postby comp666 » July 15th, 2014, 5:26 pm

After 1 run, my botvac got lots of hair wedged between the 3 pins and the bearing. The 3 pins are now collapsed inward and deformed, although they aren't completely broken off yet like the OP's. How can I repair this and will this cause problems? Did the sugru work?
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Re: Botvac problem.. You have too see this

Postby ofirshw » July 28th, 2014, 12:20 pm

Getting back to this issue.
Has anyone found an exact replacement (sealed) for the ball bearing that will cost me less than 7$?
I'm sure that it can be found on Ebay or so, just couldn't find the exact one (with the same size).
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Re: Botvac problem.. You have too see this

Postby 3kgt » July 28th, 2014, 12:34 pm

ofirshw wrote:Getting back to this issue.
Has anyone found an exact replacement (sealed) for the ball bearing that will cost me less than 7$?
I'm sure that it can be found on Ebay or so, just couldn't find the exact one (with the same size).


I did buy several types from ebay...some worked great, some not so good.... Bad part is i have no links to them anymore in my purches history..
Love robot vacums :)
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Re: Botvac problem.. You have too see this

Postby ofirshw » July 29th, 2014, 3:13 am

Thank you! will the size listed above (8x16x5mm) work for the Botvac?
Measuring the original bearing of the Botvac got me 8.5x15.5x4.3mm, and I'm afraid that the diameters won't fit as good.
I was also trying to find inch scale bearing (as Neato is an American company) - should be 1/3x3/5x1/6", but couldn't find anything that will fit.
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Re: Botvac problem.. You have too see this

Postby vic7767 » July 29th, 2014, 9:20 am

The proper sealed bearing size in millimeters is 8 x 16 x 5. iRobot is also an American company but ball bearings for it are measured in MM.
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