Product category:
Gears, brakes, couplings and engines
News Release from: Kerk Motion Products | Subject: Custom lead screw and nut
Edited by the Engineeringtalk Editorial
Team on 17 May 2002
Custom lead screws for transportation
applications
Kerk Motion Products is offering its custom lead screw and nut for automatic door actuation.
Kerk Motion Products is offering its custom lead screw and nut for automatic door actuation The product, available in both standard and custom configurations, has been adapted for use in a variety of transportation-related applications, including use in mass transit vehicles such as subways, trains, and trolleys
This article was originally published on Engineeringtalk on 8 Apr 2002 at 8.00am (UK)
Related stories
High torsional stability from spline shafts
The Kerk Spline Shaft series has been designed for light load applications, where low cost, low friction and long life are critical design considerations.
Coaxial screw rails save space and cut costs
Designed to shield the lead screw from debris and harsh environments, co-axial screw rails from Kerk Motion Products eliminate the need for protective bellows, saving space and cutting costs.
The lead screw assembly requires no maintenance and offers a high degree of accuracy and dependability.
Economically priced, the assembly is designed for extremely long life: it has been customer tested to more than 1 million cycles.
The screw and nut combination includes a precision-rolled, stainless steel lead screw and a custom-formulated, high-strength, self-lubricating Kerkite polymer nut.
The screw, available in lengths up to 12 feet, is offered in both right- and left-hand thread in a variety of leads (including back driving leads), up to three inches per revolution.
In a typical transportation application, the doors are opened and closed by the motor-driven screws.
In some instances (such as a set of subway doors where the two door halves meet in the middle) each door leaf has its own motor and Kerk screw to open and close.
The doors use software and motor synchronisation to achieve simultaneous movement.
In other cases, a single Kerk lead screw can be used where both doors ride on their respective half of the screw.
The lead screw is RH on one side and LH on the other, so that turning a single motor in one direction allows the two doors to move in opposite directions.
The screw is currently in use in transportation-related applications in North America, Europe, Asia and Far East.
(This was Engineeringtalk's Top Story on 16 May 2002).
• Kerk Motion Products: contact details and other news
• Email this article to a colleague
• Register for the free Engineeringtalk email newsletter
• Engineeringtalk Home Page
Search the Pro-Talk network of sites
