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Steel Spline Shafts eliminate need for external lubrication.

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Steel Spline Shafts eliminate need for external lubrication.
Steel Spline Shafts eliminate need for external lubrication.
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July 29, 2003 - Surface-hardened steel spline shafts are treated with low-friction TFE coating. Graphite- and PTFE-filled thermoplastic bushing, manufactured with integral brass collar, facilitates mounting without nut distortion. Offered in standard lengths to 24 in., assemblies are available with basic or anti-backlash bushing; plain or thread mount bushing; and , 3/8, , or in. dia shaft. Lengths to 96 in. are available on custom basis.

Kerk Motion Products Adds Steel Spline Shaft to Their Popular Spline Shaft Series

(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)

Kerk Motion Products, Inc.
1 Kerk Dr.
Hollis, NH, 03049

Press release date: July 24, 2003

Kerk Motion Products, one of the world’s premier manufacturers of non-ball lead screws, expands its Spline Shaft Series with the introduction of its new Steel Spline Shafts. Featuring three times the stiffness of Kerk’s Aluminum Spline Shafts, the Steel Spline Shafts are designed for heavier side loads and applications with rough handling. Ideal solutions for a variety of motion control applications, the Steel Spline Shafts are perfect for medical sampling and dispensing systems, material handling, business equipment, assembly machinery and positioning systems for semiconductor process tools.

Kerk’s low-cost Spline Shafts offer a wide range of benefits, including extended life and low friction in any application that requires a rotary drive with adjustable position or a linear guide with high torsional stability. In an application currently using a ball spline, hex-, square- or D-shaft, the Spline Shafts can provide a lower cost alternative without sacrificing positional accuracy. Because of their low-friction performance, Kerk’s Spline Shafts allow users to downsize certain process equipment, including motors, reducing heat buildup and energy requirements.

The Steel Spline Shafts’ assembly consists of a surface-hardened steel spline shaft treated with Kerk’s proprietary, low-friction TFE coating, coupled with a graphite and PTFE-filled thermoplastic bushing, which is manufactured with an integral brass collar to facilitate mounting configurations without nut distortion. The TFE coating eliminates the need for external lubrication and maintenance. Kerk’s Steel Spline Shafts are dimensionally interchangeable with Kerk’s Aluminum Spline Shafts, simplifying design, part specification and inventory.

Kerk’s Steel and Aluminum Spline Shafts are available with any combination of the following standard features: basic or anti-backlash bushing, plain or thread mount bushing, and ”, 3/8”, ” or ” diameter shaft. Custom machining of both the bushing and rail is available for mounting considerations, or to adapt to any required format. Standard lengths up to 24” are offered, and lengths up to 96” are also available on a custom basis. Aluminum Spline Shafts are available in hollow configurations.

About Kerk Motion Products
Established in 1976, Kerk Motion Products, Inc. is one of the world’s largest exclusive manufacturers of non-ball lead screws. The company, headquartered in Hollis, NH, develops internationally patented, anti-backlash designs and materials that provide high accuracy, unsurpassed repeatability, and long life in a full range of motion control applications. The company’s production facilities include its own injection molding and moldmaking, CNC machine tools, and a quality control department utilizing real-time SPC. For more information about Kerk Motion Products and its lines of lead screws, screw rails, and linear rails, contact Kerk Motion Products, Inc., 1 Kerk Drive, Hollis, NH 03049; Call 603-465-7227; Fax 603-465-3598. More information is available at
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