Linear Guideway Technical Information HIWIN TECHNOLOGIES CORP. No. 46, 37th Road Taichung Industrial Park Taichung 40768, TAIWAN Tel: +886-4-23594510 Fax: +886-4-23594420 www.hiwin.com.tw [email protected] •CHICAGO 1400 Madeline Lane Elgin, IL. 60124, USA Tel: +1-847-8272270 Fax: +1-847-8272291 www.hiwin.com [email protected] •SILICON VALLEY Tel: +1-510-4380871 Fax: +1-510-4380873 HIWIN GmbH Brücklesbünd 2, D-77654 Offenburg, GERMANY Tel: +49-781-93278-0 Fax: +49-781-93278-90 www.hiwin.de www.hiwin.eu [email protected] HIWIN JAPAN •KOBE 3F. Sannomiya-Chuo Bldg. 4-2-20 Goko-Dori. Chuo-Ku KOBE 651-0087, JAPAN Tel: +81-78-2625413 Fax: +81-78-2625686 www.hiwin.co.jp [email protected] HIWIN SCHWEIZ Schachenstrasse 80 CH-8645 Jona, SWITZERLAND Tel: +41-55-2250025 Fax: +41-55-2250020 www.hiwin.ch [email protected] Distributed by LM76 Linear Motion Bearings 1-800-513-3163 www.LM76.com Linear Guideway Technical Information HIWIN FRANCE 24 ZI N°1 EST-BP 78, LE BUAT, 61302 L’AIGLE Cedex, FRANCE Tel: +33-2-33341115 Fax: +33-2-33347379 www.hiwin.fr [email protected] Kastanova 34 CZ 62000 Brno, CZECH REPUBLIC Tel: +420-548-528238 Fax: +420-548-220233 www.hiwin.cz [email protected] Mega-Fabs Motion Systems, Ltd. 13 Hayetzira St. Industrial Park, P.O.Box 540, Yokneam 20692, ISRAEL Tel: +972-4-9891050 Fax: +972-4-9891080 www.mega-fabs.com [email protected] ©2011 FORM G99TE15-1104 (PRINTED IN TAIWAN)

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Preface A linear guideway allows a type of linear motion that utilizes rolling elements such as balls or rollers. By using recirculating rolling elements between the rail and the block, a linear guideway can achieve high precision linear motion. Compared to a traditional slide, the coefficient of friction for a linear guideway is only 1/50. Because of the restraint effect between the rails and the blocks, linear guideways can take up loads in both the up/down and the left/right directions. With these features, linear guideways can greatly enhance moving accuracy, especially, when accompanied...

Linear Guideways General Information 1-2 Selecting Linear Guideways Identify the condition  Type of equipment  Space limitations  Accuracy  Stiffness  Travel length  Magnitude and direction of loads  Moving speed, acceleration  Duty cycle  Service life  Environment Selection of series  HG series - Grinding, milling, and drilling machine, lathe, machine center  EG series - Automatic equipment, high speed transfer device, semiconductor equipment, wood cutting machine, precision measure equipment  QE/QH series - precision measure equipment, semiconductor equipment, Automatic equipment,...

1-3 Basic Load Ratings of Linear Guideways 1-3-1 Basic Static Load (1) Static load rating (C0) Localized permanent deformation will be caused between the raceway surface and the rolling elements when a linear guideway is subjected to an excessively large load or an impact load while either at rest or in motion. If the amount of this permanent deformation exceeds a certain limit, it becomes an obstacle to the smooth operation of the linear guideway. Generally, the definition of the basic static load rating is a static load of constant magnitude and direction resulting in a total permanent deformation...

Linear Guideways General Information 1-4 Service Life of Linear Guideways 1-4-1 Service Life When the raceway and the rolling elements of a linear guideway are continuously subjected to repeated stresses, the raceway surface shows fatigue. Flaking will eventually occur. This is called fatigue flaking. The life of a linear guideway is defined as the total distance traveled until fatigue flaking appears on the surface of the raceway or rolling elements. 1-4-2 Nominal Life (L) The service life varies greatly even when the linear motion guideways are manufactured in the same way or operated under...

Due to the temperature will affect the material of linear guide, therefore the permissible load will be reduced and the nominal service life will be decreased when over 100oC. Therefore, the basic dynamic and static load rating must be multiplied by the temperature factor. As some accessories are plastic which can’t resist high temperature, the working enviornment is recommended to be lower than 100oC. Temperature (3) Load factor ( fw ) The loads acting on a linear guideway include the weight of slide, the inertia load at the times of start and stop, and the moment loads caused by overhanging....

Linear Guideways General Information (1) Load on one block Table 1-3 Calculation example of loads on block Loads layout W: Applied weight l: Distance from external force to driver c: Rail spacing Pn: Load (radial, reverse radial), n=1~4 F: External force d: Block spacing a,b,k: Distance from external force to geometric center Ptn: Load (lateral), n=1~4 h: Distance from center of gravity to driver

(2) Loads with inertia forces Table 1-4 Calculation Examples for Loads with Inertia Forces Considering the acceleration and deceleration Load on one block  Constant velocity W: Weight of object (N) g: Gravitational acceleration (9.8m/sec2) Pn: Load (radial, reverse radial) (N), n=1~4 Vc: Maximum speed (m/sec) t1(t3): Acceleration (deceleration) time (s) t2: Constant speed time (s) c: Rail spacing (m) d: Block spacing (m) l: Distance from center of gravity to driver (m) 1-5-2 Calculation of The Mean Load for Variable Loading When the load on a linear guideway fluctuates greatly, the variable...