Archive for the ‘Couplings’ Category

Lock Nuts And Lock Washers – A Fool-Proof Guide

Friday, August 12th, 2016

The world of lock nuts and lock washers may be as simple as ABC to someone who is, ‘in the know.’ If, however, you have little experience in this field, then you may be wondering what on earth lock nuts and washers are, and how they are actually used. It’s time for a quick fool-proof guide – enjoy!


TB Wood’s Sure-Flex® Plus Couplings

Friday, June 10th, 2016

Here’s a quick video showing details and testing of Sure-Flex Plus Couplings and Sleeves.

For a wide variety of TB Wood’s Sure-Flex couplings and sleeve parts at excellent prices see the TB Wood’s page of our online catalog here.


Understanding The Parts And Types Of Elastomeric Couplings

Friday, February 12th, 2016

Elastomeric couplings are a kind of coupling that transmits the torque or rotation of one shaft to another using an elastic material.

Couplings are tools used in industrial projects to make sure that power will be transmitted. The elastomeric couplings are considered as “savers” by most industries since, unlike other kinds of couplings which normally need lubricants, they can work on their own using just the flexible material attached to it.


Baldor – Maska

Thursday, February 17th, 2011
  • Interchange by Part # and Size with Corresponding Elements
  • Variety of Insert Elements fo different applications
  • On-line Drive Selection Program and CAD Drawings for StarFlex and MaskaFlex Types
  • Made from High Strength Cast Iron
  • Coupling Selection Process, Service Factors and Ratings in Baldor-Maska catalog


  Starflex 4-Flex Maskaflex
Torque (in.-lbs) 2.5 – 6,228 60 – 47,628 900 – 82,500
Max. HP/100 RPM 9.9 18 130.9
Torsional wind-up (deg.) 7 degrees – 15 degrees 3 degrees – 7 degrees
Angular misalignment (deg.) 1/2 degrees – 1 degrees 1/4 degrees – 1 degrees 4 degrees
Axial permissiveness (inch.) 0.010-0.015 0.010-0.040 0.047-0.203
Sizes Available limited compressibility 0.063″-0.266″
Elements Available Nitrile Rubber (NBR) EPDM Natural Rubber (NR)
  Hytrel Hytrel  


Important Reminder:
Selecting the proper type and size of coupling and element material, based on the application,

service factor, temperature and environment, will result in efficient, long-lasting operations.


Tuesday, February 15th, 2011

As a grand opening special for our new website at

Bearings Incorporated,

we are offering a 10% discount off of your order.

Type in the code BRGS while in checkout, and recieve 10% off of your order.

This special is set to expire on March 15, 2011.


Baldor – Maska –Elastomeric Couplings; Selection and Maintenance Tips

Thursday, February 10th, 2011

Advances in technology and design innovation have resulted in numerous benefit of Elastomeric Couplings in a vast array of applications.

Elastomeric Couplings

Selection and Maintenance Tips

Flexible Coupling:  A mechanical fastening devise used to connect two rotating shafts for power transmission that accommodates equipment misalignment.

Elastomer:  Resilient material having elastic properties.  (rubber, synthetic rubber or plastics)

Elastomer Element:  An assembly of components designed to connect axially oriented shafts in order to provide power transmission and accommodate shaft misalignment through elastomeric materials.

Why Elastomeric Element Couplings (versus Gear-type)?

ENVIRONMENTAL IMPACT – No lubrication required.  For every dollar spent on grease, 5 times more is spent on environmental cleanup.

PERFORMANCE – Elastomer elements are resilient and reduce the amount of vibration and shock being transmitted.  In rare events when the element does fail (extreme torque or excessive misalignment), a new insert is installed in minutes.

OUTPUT – Handle equal or higher torque requirements compared to gear couplings without increasing the size of the part.

COST SAVINGS – There is no metal-to-metal contact as power is transmitted through non-metallic elements; this reduces the replacement component to just the element.

OPERATIONS – Coupling advantages result in reliable, clean operations and improved preventive maintenance which contribute to reduced failures and equipment downtime.

MAINTENANCE – Multiple cover options allow for easy inspection and as it is not necessary to move the parts, change-out takes only minutes.

Importance of Proper Selection

Coupling two shafts together can require detailed calculation.  The best suited coupling type will depend on the application, drive and driven equipment, shaft diameter, space available, power, torque and speed to be transmitted, life expectancy required, electrical insulation, operating temperature range and the nature of the misalignment — which  could be angular, parallel or a combination.  Different coupling types are also differentiated by torsional, angular, radial and axial stiffness.

What you should know about coupling selection, and why!

  1. Horsepower — almost all couplings are sized based on the horsepower to be transmitted.
  2. Type of Drive — if the power source is a reciprocating engine, there will usually be a “Driver Service Factor Adder”.  Torsional vibration is produced in a continuous steady form that can be transmitted directly  into the driven machine; an elastomeric coupling is designed to help dampen this vibration.
  3. Type of Driven Equipment — driven machines are classified based on their load characteristics and a service factor is assigned accordingly.  Multiplication of the service factor by the input horsepower gives the design horsepower upon which most couplings are sized.
  4. Speed at which Couplings Operate — Most selections are based on the HP at a certain RPM.  As the speed is reduced, the torque increases.  Verify that you don’t exceed the maximum speed of the coupling.
  5. Shaft Sizes — Make sure the selected coupling fits with the required bore.  You may have to choose a larger coupling than your design calls for in order to obtain the correct bore size.
  6. Space Limitations — Will the couplings length and diameter fit within the allotted space?
  7. Environment — Several factors that occur in the surroundings can affect the service life of a coupling.  For example, the operating characteristics of an elastomeric coupling can change if the temperature exceeds 170 degrees F (77 degrees C) or is -30 degrees F (-34 degrees C); and if the environment is wet or oily, some types of couplings are inappropriate.

Data required …

  • Power in HP, CV or KW
  • RPM
  • Shaft Diameters (driven and drive shafts)
  • Service Factor

Pro Active Maintenance

Keeping machinery operating successfully requires careful design selection, proper installation, periodical inspection, observing changes n performance and investigating thoroughly the cause of a failure.


  • Does the coupling show signs of distress.  Such as running hot, loose bolts, cracked rubber or power on the baseplate?
  • Is there excessive backlash across the part?
  • Does the shaft rotate easily and consistently through a 360 degree rotation? Or, does it bind at some point?
  • As you disassemble, are any parts missing?  Is there excessive wear?  Compare the appearance with a new coupling.
  • Is the element worn or cracked?  Are the set screws still in place or were they loose?  If the element is excessively worn, was the total time it was in operations compatible with its service life?
  • When replacing an element, use an appropriate puller to remove the flanges.  Do not force then off with a hammer.

Another new line … Zero Max!!!!

Thursday, October 21st, 2010

Zero-Max has been in business for over 60 years. Their product lines consist of couplings, shaft locking connections, linear actuators, gear drives and more.

• ServoClass Couplings
• CD Couplings
• Schmidt Offset Couplings
• Torq-Tender Couplings
• Control Flex Couplings
• ETP Shaft Locking Connections
• Roh’lix Linear Actuators
• Adjustable Speed Drive
• Crown Gear Drives
• OHLA Overhung Load Adapters

We’re excited about our new line acquisition, and look forward to many years of business together.