Precision rail guides catalogue

Ewellix is a global innovator and manufacturer of linear motion and actuation solutions used in assembly automation, medical applications and mobile machinery. Formerly part of SKF Group, the Ewellix Group consists of 16 sales units and eight factories. External net sales are approximately 2.3 SEK billion and we employ around 1 200 people. Ewellix is headquartered in Gothenburg, Sweden and is owned by Triton. Technology leadership Global presence and local support Our journey began over 50 years ago as part of the SKF Group, a leading global technology provider, with the world’s first precision...

Trusted engineering expertise Our industry is in motion; pushing towards solutions that reduce environmental impact and leverage new technology. We provide technical and manufacturing expertise to overcome our customers’ challenges. We work in a wide range of industries, where our solutions provide key functionality for business critical applications. We have a unique understanding of linear equipment and how it’s integrated in customers’ applications to provide the best performance and machine efficiency. For the medical industry, we provide precision components for use in core medical equipment....

As a global innovator and manufacturer of linear motion and actuation solutions, Ewellix is in a position, both technically and economically, to meet almost any customer requirement. This catalogue covers the entire range of Ewellix precision rail guides and accessories. Ewellix precision rail guides are highly accurate products for linear motion and are ideally suited for use in a wide variety of machine tools, machining centres, handling systems and special machinery, as well as in measuring and testing equipment and semi-conductor production machines. Ewellix precision rail guides are available...

Precision Rail Guides Ewellix offers a large assortment of precision rail guides (⮑ table 1). The different versions, mainly characterized by the type of rolling elements used, are as follows: • Ball assemblies of LWRB series. • Ball assemblies with Anti-Creeping System of LWRB ACSM series. • Crossed roller assemblies of standard LWR series. • Crossed roller assemblies of optimized LWRE series. • Crossed roller assemblies with Anti-Creeping System of LWRE ACS series. • Crossed roller assemblies with Anti-Creeping System of LWRE ACSM series. • Needle roller assemblies of LWRM/LWRV series. • Needle...

The table 1 shows the complete range of Ewellix precision rail guides, together with all available sizes. The blue shaded areas indicate the sizes included in the Modular Range. Contrary to the current lack of uniformity within the market, the interchangeable precision rail guides of the Modular Range are all within the same outer dimensions (⮑ fig. 1). For fast delivery, please refer to the rail guides that are available in kit packaging. Market situation Ewellix Modular Range Table 1 LWRB LWRB ACSM LWR LWRE LWRE ACS LWRE ACSM LWRM / V LWM / V LWM / V ACSZ LWRPM / V

Precision Rail Guides Many users are familiar with “cage-creeping” in conventional precision rail guides. This occurs when the cage moves out of its intended position, adversely affecting performance and possibly requiring service. This effect may occur, for example, as a result of high acceleration, uneven load d istribution or vertical mounting. Ewellix has solved this problem by offering highly sophisticated Anti-Creeping Systems (ACS) for most types of guides. Advantages: • Cage-creeping eliminated. • Suitable for high acceleration, vertical mounting and uneven load distribution. • Increased...

Rails for anti-creeping cages All rails for anti-creeping cages are toothed over their entire length as standard. To save costs it is possible for ACS and ACSZ rails, to specifiy a stroke with the toothing in the rails produced accordingly (fig. 2 and 3). LWRE ACS standard stroke For rails with a specified stroke, the length of the stroke, which is symmetrical to the rail, must be stated in millimetres after the suffix ACS or ACSZ. ACS and ACSZ cages must be operated only along the specified stroke length to ensure that the control gear is not damaged. It is therefore recommended to use the theoretical...

Precision Rail Guides 1.4  Ewellix precision rail guides in kit packaging To simplify the ordering process and stock-keeping for our customers, Ewellix offers precision rail guides in pre-defined kits. Each kit consists of 4 rails in precision class P10, 2 rolling element assemblies and 8 end pieces (ACSM kits without end pieces). The available kits can be found in the specific rail guide chapters. With delivery time on request it is possible to order a kit with two rails in standard length and two short rails with lead in radius. For kinematic “overrunning” (⮑ chapter 2.3.5). For kinematic “with...

Anti-creeping system Ewellix developed the industry’s first anti-cage-creep solution. It keeps the movement of the rolling element assembly in the required position at the loaded zone, avoids cage creep from high operational speed and acceleration to uneven load distribution and weak adjacent parts, and prevents unplanned downtime and additional maintenance. In addition, due to the defined position of the cage, Ewellix precision rail guides with anti-creeping system, or ACS, enable increased accuracy, higher accelerations (tested up to 160 m/s2) and reliable vertical installation. Cage creep...

2.1.1  Materials As standard, precision rails are manufactured from tool steel 90MnCrV8 (1.2842) with a hardness between 58 and 62 HRC. With delivery time on request and with suffix “/HV”, the rails can also be supplied in stainless steel, e.g. X90CrMoV18 (1.4112). All rails from the LWRE ACSM series are made of stainless steel X46Cr13 (1.4034) or X65Cr13 (1.4037). The hardness of stainless steel rails is between 54 and 58 HRC. Standard rolling elements are made from carbon chromium steel 100Cr6 (1.3505) with a hardness of between 58 and 65 HRC. Stainless steel rolling elements are available...