Slit Type Plastic Couplings from Sterling Instrument
October 1, 2009 by Miles Budimir
Filed under Couplings, Mechanical Components
New Hyde Park, NY – A new series of slit type plastic couplings from Sterling Instrument features low cost, UV resistance, voltage and RF isolation. 
These couplings, identified as the S50TLC… Inch and Metric Series are stocked in sizes 13, 19 and 25. These lightweight molded patented couplings can replace stainless/aluminum slit type couplings with lower cost and improved operation with no windup or backlash or any derating for reversing applications. It uses a metal screw-to-metal nut design to insure a tight fit between the shaft and the coupling, and does not use threads cut into the molded piece.
These couplings are made of engineered polymer and have stainless steel fasteners. Bore sizes range from 0.125 to 0.500 in. (3 to 12mm). They range in length from 0.710 to 1.400 in. (18 to 36mm) with a maximum temperature range of -4°F to +284°F (-20°C to +140°C).
The couplings can be used in a variety of applications and are especially able to accommodate tight or skewed connections. Quotes, online orders, available stock, and 3D CAD Model downloads are available at our new eStore at: www.sdp-si.com/eStore
Detailed specifications are contained in Catalog D795, available free upon request from Sterling Instrument, 2101 Jericho Turnpike, P.O. Box 5416, New Hyde Park, NY, USA 11042-5416.
Phone: 516-328-3300, Fax: 516-326-8827.
http://sdp-si.com/web/html/newprdcouplings10.htm
2009 BK Series Catalog from R+W
May 1, 2009 by Motion Control Tips Editor
Filed under Couplings, Mechanical Components
For highly dynamic and accurate servo driven systems, stainless steel bellows couplings have been a mainstay for some years. Their increasing prevalence has driven the development of a very wide variety of mounting configurations, wall thicknesses, lengths, torque ratings, etc.
The 2009 BK series catalog from R+W represents the latest collection of standard bellows coupling designs for applications requiring torque ratings from 15Nm – 10,000 Nm. Flanges, shafts, hollow bores and nearly any other mechanical interface are accommodated.
R+W America
www.rw-america.com
Stafford Large Bore Shaft Collars and Rigid Couplings
March 19, 2009 by Motion Control Tips Editor
Filed under Couplings
Large bore shaft collars and couplings that can be custom engineered for drive train applications in wind power generation systems are available from Stafford Manufacturing Corp. of Wilmington, Massachusetts.
Stafford Large Bore Shaft Collars and Rigid Couplings are custom engineered for applications up to 16” and 8” I.D., respectively, and come in one- and two-piece configurations that can be modified to meet a variety of special requirements. Ideal for wind power generator drive systems, they can be precision balanced and incorporate steel targets which can be read from both the face and O.D. to add speed sensing capability to shafts.
Stafford Large Bore Shaft Collars and Rigid Couplings can be machined from aluminum, steel, stainless steels, titanium, brass, and other alloys with dimensional tolerances of <0.001” and run-out and concentricity tolerances of <0.001” TIR, depending upon the part configuration. Modifications can include keyways, slots, cam surfaces, special threads and other features.
Helical Products
February 20, 2009 by Motion Control Tips Editor
Filed under Couplings
The demands put upon today’s design engineers seem to increase yearly. It is little wonder engineers are reaching for the Rolaids with one hand and the assistance of industry specialists with the other. Clearly the pressure is on engineers to produce designs that create competitive edge.
Designs that provide a competitive edge combine simplicity of manufacture and assembly with durability and quailty in a compact design at a reasonable cost. Every component in an assembly should be evaluated and reevalulated routinely to determine if it could do more and do it better. Another name for its process is “value engineering.”
Each of the integrated, multi-featured products that Helical makes is a story unto itself. The diversity of the features displayed in these parts offers a glimpse into the productivity potential that can be had by using multi featured parts. The integrated, multi-featured part saves assembly time, conserves system space, and by virtue of its single piece name, assures backlash free performance. In almost every case, this means extended life and sizable cost savings to the customer. The only characteristic these parts have in common is the HELI-CAL® Flexure (flexible beam). All other features incorporated in each part were created specifically to customer requirements.
Visit www.Heli-Cal.com
R + W Couplings
February 20, 2009 by Motion Control Tips Editor
Filed under Couplings
Protection of an electromechanical system from torque overload is often assumed to be guaranteed by the current limits set in the drive parameters.
But in the case of hard stops, impacts and other situations where overload occurs rapidly, sufficient energy to do damage often exists in the rotating inertia driving the load. R+W servo-rated torque limiters are accurate to +/-5% release torque and positively disengage the motor or gearbox shaft in 1-3 milliseconds. Patented preloads and a specially designed spring system remove backlash and guarantee a low profile. Selection tool and personal sizing assistance are available at www.rw-america.com.
