HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Feature
Automation & Motion Control

Bearing Life Prediction for Gearboxes With Applied Overhung Loads

NO RATINGS
Page 1 / 3 Next >
View Comments: Newest First|Oldest First|Threaded View
joengwen
User Rank
Iron
Determine the OHL rating for a gearbox
joengwen   3/13/2014 2:51:21 AM
NO RATINGS
I tried to design a gearbox .And I believe I choose the right bearings with no OHLs on the output shaft.But I am not sure how to determine how much OHLs it can afford under the required input horse power.My design process is :
design the gears with enough strength -> calculate the loads on the bearings which are generated by the gears -> choose bearings L10h >5000hrs under a 1.0 service factor
If there is no OHLs on the output shaft, the design is finish.
But if I need a OHL rating for this unit, how can I do ?

Thanks 

Mitch@Cone
User Rank
Iron
Re: BEARING LIFE FOR OHL
Mitch@Cone   8/14/2013 12:18:17 PM
NO RATINGS
Thank you for your kind comments.  We rely on our bearing supplier to adjust our bearing life when conditions other than those assumed during the time of the original design.  Yes, our application engineers do make adjsutments based on the change in oil type or other environments conditions such as extreme temperature or excessive overhung or shock loads.

Mitch@Cone
User Rank
Iron
Re: Solid vs Hollow
Mitch@Cone   8/14/2013 12:07:14 PM
NO RATINGS
Thank you for the question, the reason the hollow output shaft has a higher overhung rating is because our reducers have larger bearings for the hollow bores versus the solid output shafts.

bobjengr
User Rank
Platinum
BEARING LIFE FOR OHL
bobjengr   8/9/2013 6:57:14 PM
NO RATINGS
Excellent post Mitchell --very informative.  I definitely depend upon suppliers for specifying and providing gear boxes for the equipment I use to automate work cell assemblies. One of the things I find fascinating are the influences environmental conditions and lubricants have on gear box life.  I'm sure in your work you quantify these factors also.  Again, great post.

 

VadimR
User Rank
Gold
Solid vs Hollow
VadimR   8/6/2013 9:29:36 AM
NO RATINGS
Please somone explain to me why the solid output shaft has a lower life than the hollow shaft.

Thanks!

Partner Zone
Latest Analysis
Ford Motor Co. announced plans last week to join an ever-growing number of automakers who intend to produce fully autonomous vehicles in the next five years.
Two new technologies from Stratasys, created in partnership with Boeing, Ford, and Siemens, will bring accurate, repeatable manufacturing of very large thermoplastic end products, and much bigger composite parts, onto the factory floor for industries including automotive and aerospace.
Obtaining the benefits of a fully digital plant requires IoT connectivity and foresight in the planning process.
Optomec's Aerosol Jet systems have now been used by several customers for printing 3D polymer and composite structures at the micron scale with embedded electronics and biomedical applications.
Six big automakers will carry the electric vehicle (EV) battery market to a five-fold sales increase by 2020, a new study says.
More:Blogs|News
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Aug 8 - 12, Getting Hands On with Arduino Mechatronics
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9 | 10


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Technology Marketplace

Copyright © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service