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	DS Series

 Double Start

Features Technical Data & 3D Models High torsional stiffness Low radial loads Parallel misalignment capability Low inertia   DS Series Bore Range DS Series Chart (3D Models) Standard Coupling Guide View Sales Drawings The DS Series was designed for today’s high performance motion control systems. This Series incorporates two helical beams (double start) in each of two separate HELI-CAL Flexures (double flexure), combining greater end-to-end rotational accuracy with radial flexibility in one design.  Available only with integral clamp attachments, the DS series provides the high torsional stiffness and low inertia necessary for positioning devices, servo motors and lead screws. The DS Series also provides you with substantial .010-inch parallel offset capability, reducing the need for high-precision alignment during assembly operations. It’s your ticket to greater system accuracy and reliability.  Available only in 7075-T6 aluminum.

Attachment Methods Internal Configuration Integral Clamp / DSAC   Relief * Major and minor diameter shafts may enter flexure area during operation * Dark areas indicate relief within the coupling interior

How to Order Coupling part numbers consist of four sections. To determine the correct numbers/letters for each section of a specific coupling part number, please refer to the charts on the following pages. Example         ** Refer to "Standard Bore Diameters" section in chart 1. Basic Model Number:  DSAC = Double start flexure, Aluminum and  Integral Clamp 2. Outside Diameter Designator: This three-digit number represents the coupling/coupler outside diameter. Based on the Performance Data in the middle of the chart, select the Outside Diameter Designator by moving left to the appropriate diameter. 3. Major Bore Designator: The larger of the two bores, its diameter is expressed in either 32nds of an inch (-8 equals 1/4 inch) or in millimeters (6mm). Please review your selection to determine if both bores can be made in the size coupling you have selected in 2. It is important that the larger bore be stated first. 4. Minor Bore Designator: The smaller of the two bores, is expressed the same as the Major Bore Designator. Either bore can be inch or mm.