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-   -   pic: 254/968 Bearings (http://www.chiefdelphi.com/forums/showthread.php?t=62751)

Travis Covington 28-01-2008 22:05
pic: 254/968 Bearings
 

Ben Piecuch 28-01-2008 22:07
Re: pic: 254/968 Bearings
 
I think the bearings on that table alone cost more than our robot. Wow, can't wait to see what the rest of this drivetrain (and robot) looks like!

Bengineer

RyanN 28-01-2008 22:13
Re: pic: 254/968 Bearings
 
That's about 120lbs worth of bearings, isn't it?

Branden Ghena 28-01-2008 22:15
Re: pic: 254/968 Bearings
 
All you need now is a robot controler, a battery, and some bumpers! :D

Travis Covington 28-01-2008 22:32
Re: pic: 254/968 Bearings
 
Quote:
Originally Posted by Ben Piecuch (Post 687708)
I think the bearings on that table alone cost more than our robot. Wow, can't wait to see what the rest of this drivetrain (and robot) looks like!

Bengineer
We actually have a local source (WJB Group) that gets precision imports for very cheap. A typical double sealed R8 costs less than 50 cents from them. All of the bearings in the picture above cost ~ $100.

Brandon Holley 28-01-2008 22:34
Re: pic: 254/968 Bearings
 
Wow travis those are some good prices on bearings...


I was about to post a "cha-ching" but if you got those for 100 bucks more power to you. Hook me up with that company ;)

chris31 28-01-2008 22:54
Re: pic: 254/968 Bearings
 
Quote:
Originally Posted by Travis Covington (Post 687729)
We actually have a local source (WJB Group) that gets precision imports for very cheap. A typical double sealed R8 costs less than 50 cents from them. All of the bearings in the picture above cost ~ $100.
Wow! What a bargain.

=Martin=Taylor= 29-01-2008 00:32
Re: pic: 254/968 Bearings
 
Compare that to $80 for 8 bearings at Osh :(.... Dang i'm envious :mad:

Qbranch 29-01-2008 07:50
Re: pic: 254/968 Bearings
 
So if it cost you 47 cents (you said a little less than fifty why not 47? :D ) and you spent about a hundred dollars, you'd have about 213 bearings.

They look like 3/8" bearing bore, 7/8" through bore, 1" flange bearings to me by the proportions on the picture, and they look like they're made by General Bearing (GBC). According to GBC, the weight of each of those bearings is 0.035lb.

So... really the weight of all those bearings isn't horrible.. 7.455lb. However, that's just bearings! Wow!

Well, i'm kind of guessing most of your axles are going to have two bearings on them (a few might have 3~4) so assuming you have 2.5bearings average per axle, you've got about 85 spinning axles on your robot. I had no idea crab drive had so many... can't wait for pictures! :yikes:

-q

p.s. anything with 85 axles that covers less area than a sheet of plywood should be on How it's Made. :)

Billfred 29-01-2008 08:03
Re: pic: 254/968 Bearings
 
Quote:
Originally Posted by Qbranch (Post 687850)
So if it cost you 47 cents (you said a little less than fifty why not 47? :D ) and you spent about a hundred dollars, you'd have about 213 bearings.

They look like 3/8" bearing bore, 7/8" through bore, 1" flange bearings to me by the proportions on the picture, and they look like they're made by General Bearing (GBC). According to GBC, the weight of each of those bearings is 0.035lb.

So... really the weight of all those bearings isn't horrible.. 7.455lb. However, that's just bearings! Wow!

Well, i'm kind of guessing most of your axles are going to have two bearings on them (a few might have 3~4) so assuming you have 2.5bearings average per axle, you've got about 85 spinning axles on your robot. I had no idea crab drive had so many... can't wait for pictures! :yikes:

-q

p.s. anything with 85 axles that covers less area than a sheet of plywood should be on How it's Made. :)
I'm betting they're not putting that many bearings on one robot; last year, 254 and 968 built a total of four robots (two for each team).

Then again, I wouldn't put it past them...

SgtMillhouse648 29-01-2008 12:59
Re: pic: 254/968 Bearings
 
Not sure how you guys are doing your crab, but I'm pretty sure we're down to 3-4 bearings per module this year if I'm thinking right. Anyhoo, can't wait to see it finished!
Malhon

Cory 29-01-2008 13:50
Re: pic: 254/968 Bearings
 
Quote:
Originally Posted by Qbranch (Post 687850)
So if it cost you 47 cents (you said a little less than fifty why not 47? :D ) and you spent about a hundred dollars, you'd have about 213 bearings.

They look like 3/8" bearing bore, 7/8" through bore, 1" flange bearings to me by the proportions on the picture, and they look like they're made by General Bearing (GBC). According to GBC, the weight of each of those bearings is 0.035lb.

So... really the weight of all those bearings isn't horrible.. 7.455lb. However, that's just bearings! Wow!

Well, i'm kind of guessing most of your axles are going to have two bearings on them (a few might have 3~4) so assuming you have 2.5bearings average per axle, you've got about 85 spinning axles on your robot. I had no idea crab drive had so many... can't wait for pictures! :yikes:

-q

p.s. anything with 85 axles that covers less area than a sheet of plywood should be on How it's Made. :)
There's actually over 400 bearings in that picture.

RyanN 10-02-2008 23:21
Re: pic: 254/968 Bearings
 
I know this is sort of irrelevant, but the other day I counted all the bearings we had on our robot, and it was about 40.

s_forbes 10-02-2008 23:24
Re: pic: 254/968 Bearings
 
There must be something wrong with our bot, we only have 16 ball bearings (12 of which are in the wheels...)

Dan Petrovic 10-02-2008 23:49
Re: pic: 254/968 Bearings
 
We only have 6 bearings on our robot this year. Four for the drive (that's right) and two for the arm.

Bronze bushings accomplish what we need for most joints for less money and less weight.


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