HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  RESOURCE CENTER  |  INDUSTRIES
Page 1/2  >  >>
User Rank
Platinum
Re: We tried that before...
9/7/2011 11:15:46 AM
NO RATINGS
Mea culpa. The sentence should read:

Bearings made from PEEK compounds can take thermal
conditions up to 482F (250C).

User Rank
Platinum
Re: We tried that before...
8/22/2011 11:53:10 PM
NO RATINGS
I figured out the math they used for the conversion...

They actually meant 482C = 899.6F

Rounded off 482C = 900F

Flip the 9... 600F

Mathmatical dyslexia kicks in...

600C = 482F

At least that's the answer I got...

btw... 1st ® post

User Rank
Platinum
8/21/2011 8:58:41 PM
NO RATINGS
I'd like to learn about the design as well.  However, I like it when young engineers or in this case a student start to think outside the box and look at ideas that may be overlooked by others.  It's a good opportunity for us "others" to take a second look at something like plastic ball bearings.  I've had a little experience with plastic bearings at lower temps.  My experience was positive because of the chemical resistance of the plastic.

Another idea may be to use plastic slides rather than bearings in some instances.  In some designs a roller bearing type system may be a little overkill.

User Rank
Platinum
Not enough information here!
8/21/2011 11:51:25 AM
NO RATINGS
Interesting but way too little information.  And, IMHO, way too little engineering design.

User Rank
Gold
didn't work last time
8/21/2011 7:07:25 AM
NO RATINGS
That something has always been done that way is the worst reason for not changing it !  Congrats to most people for trying new ways, just evaluate the risks, the failures and be careful.  Far too many fail and don't put much effort into finding out why.

User Rank
Platinum
Re: We tried that before...Plastic Bearings in Jetpack
8/19/2011 1:13:24 PM
NO RATINGS
They all jumped on one error but missed the part about the bearings not being in the high temperature area. So, although there is a serious error, it is in a different area..

If the bearings are replaced every few flights, it would be very interesting to know why, since I don't do any applications where service that often would be accepted. In fact, A lot more information about the jetpack would be interesting. I don't think that the location of the jets was obvious, in fact, I did not see anything that looked like a jet any place above the wearers cg. and so I would really like to know how it is made to be stable. It does seem to be quite different from the other jetpacks that I have seen. So more information on that part would be good.

I do wonder more than a little about the durability of the IGUS bearings if they must be replaced that often, how about a description of why?

User Rank
Iron
Re: We tried that before...
8/19/2011 11:15:04 AM
NO RATINGS
Welcome to the world of flight.  For the pilot's safety and longevity, a bearing that keeps him secured to his craft is an important component.  The aviation authorities probably thinks so as well.  This old guy would rather see an established material used with a robust configuration (AKA overkill) on this critical component until the loading parameters are better defined and the plastic bearing can be tested and confirmed to a much higher reliability.  Why do you think aircraft cost so much?

User Rank
Gold
Re: We tried that before...
8/19/2011 10:01:41 AM
NO RATINGS
more like 1112 degrees F!

User Rank
Iron
Article's temperature conversion is wrong.
8/19/2011 9:56:49 AM
NO RATINGS
My conversion formula says that 600C = 1112F, which is way too high for plastics.
250C = 482F, which is in line with published working temperatures for PEEK.

"Bearings made from PEEK compounds can take thermal conditions up to 600C (482F).Bearings made from PEEK compounds can take thermal conditions up to 600C (482F)."

User Rank
Iron
Could ceramic bearings be another viable solution
8/19/2011 9:46:04 AM
NO RATINGS
Ceramic bearings may have some of the features of plastic bearings, while being longer lasting -- especially for applications requiring higher bearing loads and elevated temperatures.

Page 1/2  >  >>

 Partner Zone
Latest Analysis
Robots that walk have come a long way from simple barebones walking machines or pairs of legs without an upper body and head. Much of the research these days focuses on making more humanoid robots. But they are not all created equal.
The IEEE Computer Society has named the top 10 trends for 2014. You can expect the convergence of cloud computing and mobile devices, advances in health care data and devices, as well as privacy issues in social media to make the headlines. And 3D printing came out of nowhere to make a big splash.
Easy home automation comes with a new Kickstarter project, the smart power strip. It controls various AC outlets with a wireless controller and a smartphone app.
SUS Corp. offers aluminum frames that are designed for use in factories. The frames are used for workstations, assembly shelving, carts, and other factory and assembly support.
Amazon.com's proposed drone-based package delivery scheme is achievable, but it could face significant technical hurdles before reaching the marketplace.
More:Blogs|News
From Dell / Intel®
Scott Hamilton, vertical market strategist for Dell Precision workstations, 5/2/2013    7
Early in my career, I worked as a draftsman and remember the days of drawing on vellum with numbered pencils and Mylar with plastic lead. This was a fun experience in the sense that I ...
Most recent post: Ralphy Boy
From Dell / Intel®
Trey Morton, Dell, 4/25/2013    3
I've been using workstations for more than 10 years and love finding ways to get more performance from my system. With demanding professional applications that require more power each ...
Most recent post: Cabe Atwell
From Dell / Intel®
Kirsten Billhardt, Manufacturing Industry Marketing Strategist, Dell, 3/26/2013    6
A lasting memory from my first job as an engineer in an auto assembly plant is standing on hard concrete at six in the morning, vending-machine coffee clutched in hand, listening to ...
Most recent post: Ockham
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Dec 2 - 6, Protecting Your Embedded System From Hacking & Theft
SEMESTERS: 1  |  2  |  3  |  4