Precision Synchromesh Cables Drives from SDP/SI

Product Announcement from Stock Drive Products & Sterling Instrument - SDP/SI

Hicksville, NY -- A new series of Synchromesh Cable Drives introduced by Stock Drive Products / Sterling Instrument are uniquely designed for positive traction to replace conventional ropes, simple cables and cog drives, especially where tight space is an important factor. This new cable drive is designed to provide high precision positioning in electronic equipment such as: copying machines, X-Y plotters, typewriters, printers, word processors, etc. A key feature of the new drive is its ability to be used in three-dimensional serpentine configurations which enable the creation of extremely miniature designs.

Synchromesh cables can be used with lower tension when compared with ropes which reduces power consumption. Unlike ropes, wind-up around drums is not required which eliminates problems with dislocated printing caused by accumulation of elongation when rope is used due to wind-up.

This patented miniature cable, identified as the A 6J 9- and A 6J 9M Series, consists of a straight center section, encased in Nylon and a helically wound outer length encased in Polyurethane. Both cable strands consist of braided stainless steel cores.

The cable is stocked in both inch and metric in the following Pitches: .120", .150", .200" and .250" (3.048 mm, 3.81 mm, 5.08 mm, and 6.35 mm). The cable O.D. ranges from .059" to .134" (1.5 mm to 3.4 mm) and has minimum tensile loads ranging from 40 lbf to 200 lbf (18 kg to 90 kg). Pitch accuracy of the drive is ±.002" (±0.05 mm) and cumulative pitch error is ±.16" (±4.06 mm) max. over 100 pitches. The flexing cycle life of the drive is 106 minimum where the pulley pitch radius is R = 13.9 x (straight center section diameter d2) and the static tension is TS = .05 x TB (Min. Tensile Load). The temperature range recommended is -22°F to +176°F (-30°C to + 80°C).

There is a complete selection of 34 inch and metric Synchromesh pulleys designed to fit 1/8" to 3/8" (2 mm to 10 mm) shafts. These pulleys are made of Acetal with brass or aluminum inserts to provide the strength characteristics of all metal pulleys with the weight and cost savings associated with plastic components.

SDP/SI are leading manufacturers of small mechanical components, servicing a wide variety of aerospace, medical and commercial industries for over 50 years. 

SDP/SI - Stock Drive Products / Sterling Instrument offers both inch and metric small off-the-shelf mechanical components for the design engineer. Thousands of stock components, in a wide variety of sizes can easily be located and purchased in one convenient place. The engineer not only meets all his component requirements, but saves valuable time by not having to search other sources. SDP/SI is your one-stop source for small mechanical components. Stock Drive Products / Sterling Instrument consistently provides high quality precision gears and gear assemblies in quantities for prototype to OEM’s. We make what others can’t.

Quotes, online orders, and 3D CAD models are available on our updated estore at

SDP/SI is a brand of Designatronics Inc., 

Designatronics, Inc.
250 Duffy Avenue, Hicksville, NY 11801.
Phone: +1  516-328-3300