Sealing and lubrication in mounted bearings webcast: Your questions answered

Webcast speaker Jim Madsen and Mac Duke from Baldor-Dodge answered additional questions about topics such as alternatives to managing heat for extending bearing service life and rules of thumb for checking grease.

11/18/2015


Jim Madsen is product manager for mounted spherical roller bearings at Baldor-Dodge. Courtesy: Baldor-DodgeA recent Plant Engineering webcast featured Jim Madsen and Mac Duke from Baldor-Dodge, on the topic: "The Importance of Sealing and Lubrication in Mounted Bearings." They responded to Webcast attendee questions that were unable to be answered during the Webcast. Those responses appear below.

An archive of the full webcast can be found here:

Q: Will proper seal design minimize seal blowout?

A: Correct. Proper mounted bearing seals should be mechanically retained and purgable so any contaminants are expelled.

Q: What are some alternatives to manage heat to extend bearing service life?

A: It is almost always advantageous to remove heat from your bearing application to improve service life. Depending on your application there are many ways to do this. In fan applications for example, many original equipment manufacturers (OEMs) use a cooling wheel attached to the shaft to keep heat from conducting through the shaft to the bearings.

Mac Duke is product manager for mounted ball bearings at Baldor-Dodge. Courtesy: Baldor-DodgeQ: Please explain the importance of viscosity in the selection of lubricants.

A: Viscosity decreases as temperature increases. Select viscosity at the anticipated operating temperature of the bearing.

  • Low speeds, high loads = high viscosity oil for maximum film thickness
  • High speeds, light loads = low viscosity oil for minimum shear/churning  

Q: What does NLGI stand for?

A: It stands for National Lubricating Grease Institute.

Q: Is 7 to 8 weeks a good rule of thumb for checking the grease?

A: No, relubrication frequency is dependent upon application conditions. Relubrication frequency should be determined by speed, hours/day run and bearing type. Most mounted bearing instruction manuals have lubrication frequency information.



Top Plant
The Top Plant program honors outstanding manufacturing facilities in North America.
Product of the Year
The Product of the Year program recognizes products newly released in the manufacturing industries.
System Integrator of the Year
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
September 2018
2018 Engineering Leaders under 40, Women in Engineering, Six ways to reduce waste in manufacturing, and Four robot implementation challenges.
July/Aug
GAMS preview, 2018 Mid-Year Report, EAM and Safety
June 2018
2018 Lubrication Guide, Motor and maintenance management, Control system migration
August 2018
SCADA standardization, capital expenditures, data-driven drilling and execution
June 2018
Machine learning, produced water benefits, programming cavity pumps
April 2018
ROVs, rigs, and the real time; wellsite valve manifolds; AI on a chip; analytics use for pipelines
Spring 2018
Burners for heat-treating furnaces, CHP, dryers, gas humidification, and more
August 2018
Choosing an automation controller, Lean manufacturing
September 2018
Effective process analytics; Four reasons why LTE networks are not IIoT ready

Annual Salary Survey

After two years of economic concerns, manufacturing leaders once again have homed in on the single biggest issue facing their operations:

It's the workers—or more specifically, the lack of workers.

The 2017 Plant Engineering Salary Survey looks at not just what plant managers make, but what they think. As they look across their plants today, plant managers say they don’t have the operational depth to take on the new technologies and new challenges of global manufacturing.

Read more: 2017 Salary Survey

The Maintenance and Reliability Coach's blog
Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
One Voice for Manufacturing
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Maintenance and Reliability Professionals Blog
The Society for Maintenance and Reliability Professionals an organization devoted...
Machine Safety
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
Research Analyst Blog
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Marshall on Maintenance
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
Lachance on CMMS
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.
Material Handling
This digital report explains how everything from conveyors and robots to automatic picking systems and digital orders have evolved to keep pace with the speed of change in the supply chain.
Electrical Safety Update
This digital report explains how plant engineers need to take greater care when it comes to electrical safety incidents on the plant floor.
IIoT: Machines, Equipment, & Asset Management
Articles in this digital report highlight technologies that enable Industrial Internet of Things, IIoT-related products and strategies.
Randy Steele
Maintenance Manager; California Oils Corp.
Matthew J. Woo, PE, RCDD, LEED AP BD+C
Associate, Electrical Engineering; Wood Harbinger
Randy Oliver
Control Systems Engineer; Robert Bosch Corp.
Data Centers: Impacts of Climate and Cooling Technology
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
Safety First: Arc Flash 101
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
Critical Power: Hospital Electrical Systems
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
Design of Safe and Reliable Hydraulic Systems for Subsea Applications
This eGuide explains how the operation of hydraulic systems for subsea applications requires the user to consider additional aspects because of the unique conditions that apply to the setting
click me