Common coupling selection errors happen all the time. Some more than others. Here, Robert Watkins, VP of Sales for Ruland Manufacturing, tells us about a few he’s seen and should be avoided at all costs. In one dampening application, we saw a food processing OEM who had a hard start, hard stop, aggressive move profile. […]
Flexible gear couplings for printing press application
A leading global commercial printing equipment manufacturer needed a replacement coupling solution for a line of its printing presses. The original disc type couplings, installed on the web press drive cylinders, lacked the required torsional stiffness, causing the rollers to slip, which led to increased amounts of defective printed materials (spoilage). The application had additional […]
Flanged-sleeve, double engagement disconnect couplings
A leading oil and gas OEM needed a torque-dense disconnect coupling for pumps used at hydraulic fracturing sites. The truck-mounted pumps are driven by energy efficient electric motors instead of traditional diesel engines. The coupling is installed between a 5,000 HP motor, turning at 1,800 RPM, and the pump. The coupling allows the pump to […]
Rigid couplings for refinery vertical turbine pumps
Vertical turbine style pumps are widely used in refinery and water treatment applications. The pumps are designed to lift fluids 20 ft. or more from sumps, pits or tanks. These types of pumps have a vertically mounted drive motor positioned directly above a long shaft that extends down inside a pipe and connects to a […]
Coupling duty cycle considerations you need to know
Edited by Mike Santora The importance of a coupling’s duty cycle is sometimes overlooked specifically because it should go without saying. With certain types of motion: continuous, start stop, reversing- engineers must look at a coupling’s static torque number, take it into consideration, and then de-rate it. For example, how often a system is running […]
How do speed and inertia affect beam couplings?
Edited by Mike Santora Beam coupling failure most often occurs when maximum speed is exceeded. Making a balanced design all the more important at higher RPM. In certain situations, such as a printing application for example, there might be an issue with banding. Vibration in the system can be caused by the coupling, causing the […]
What does a bellows coupling torque failure look like?
We all know the value of an ounce of prevention. But what if the wrong bellows coupling has already been installed unbeknownst to you? Can you recognize warning signs before a complete coupling failure? Sometimes you can says Robert Watkins of Ruland Manufacturing. With bellows coupling torque failure, you can often see a deformation in […]
Timken acquires Torsion Control Products
The Timken Company has announced that it has acquired Torsion Control Products, Inc., a manufacturer of engineered torsional couplings used in the construction, agriculture and mining industries. “The acquisition of Torsion Control Products further expands our existing couplings business with technically differentiated products,” said Richard G. Kyle, Timken president and chief executive officer. “We are […]
ContiTech: Elastic coupling elements
Overview Elastic coupling elements are used as spring elements in diesel drives for vibration-free power transmission. They are used in vehicles, ships, power stations and drives in the field of mechanical engineering. Benefits & Features The primary function of elastic coupling elements is to insulate torsional vibrations. Elastic coupling elements have an extremely broad torsion […]
Tips for understanding torque with bellows and Oldham couplings
It’s important to note the difference between steady state and max torque based on motion type or when using a bellows vs. a disc coupling. It’s also important to understand how couplings are rated. Jaw couplings have a peak torque, for example, and rigid couplings have a superior torque capability but do not allow for […]