LLU catalogue
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Profile rail guides - LLU catalogue

Ewellix is a global innovator and manufacturer of linear motion and actuation solutions. Today, our state-of-the-art linear solutions are designed to increase machine performance, maximise uptime, reduce maintenance, improve safety and save energy. Technology leadership Global presence and local support Our journey began over 50 years ago as part of the SKF With our global presence, we are uniquely positioned to tise to continuously develop new technologies and use solutions, with full technical and applications support Group, and our history with SKF provided us with the experthem to...

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 We have a unique understanding of linear equipment and provide key functionality for business critical applications. For the medical industry, we provide precision components how it’s integrated in customers’ applications to provide the best performance and machine efficiency. for use in core medical...

The productivity and economic success of a given applica- tion depends, to a large extent, on the quality of the selected linear components. Often these components are a signifi- cant factor in market acceptance and thus help to obtain a competitive edge for the manufacturer. To do this, the linear components have to be as adaptable as possible to precisely meet the application’s requirements, ideally with standard components. The Ewellix roller profile rail guide series LLU satisfies these market demands: available in a wide range of sizes, car- riages and accessories as well as in various...

Just as with rotary bearings, the raceways of profile rail guides can be arranged in an X- or O-arrangement. The technical characteristics of these two arrangements are es- sentially the same. Therefore, there are no basic differences in behavior in the vast majority of load situations, except when they are subjected to moment loads around the X-axis. The LLU roller profile rail guides from Ewellix feature an O-arrangement, based on the contact angle of the rolling el- ements (⮑ fig. 1). The advantage of this arrangement is that especially in one-axis systems, the moment-related rigidity is...

1.2.1 Components and material specifications 1 2 Carriage 3 Cylindrical rollers Front seal 6 Grease nipple 7 Screw Material specifications 1. Steel, inductive hardened 2. Steel, hardened raceways, outer surface phosphated 3. Bearing steel 4. Elastomer 5. GF reinforced polymer 6. Steel, coated 7. Stainless steel 8. Polymer

1.2.2 Standard carriage components Seals The ingress of dirt, swarf and liquids, as well as lubricant leakage can significantly reduce the service life of a profile rail guide system. Ewellix roller profile rail guide LLU car- riages are therefore supplied with a front and side seal as standard, which can significantly extend service life. Front seal Front seals are especially important since they offer protection for the carriage in the direction of movement. They are designed as double-lip seals in order to provide improved wiping properties (⮑ fig. 2). Side seal Side seals made of...

Rigidity, strength and accuracy for improved production processes The LLU roller profile rail guide has four rows of cylindrical rollers in O-arrangement with the four raceways in 45° orientation towards the guiding base. This arrangement optimizes the load sharing in all four main load directions and is in accordance with ISO 14728. This feature provides a high degree of design flexibility. The ability to accommodate high loads and moment loads makes these rail guides ideal even for very demanding applications. Smooth running performance Optimized recirculations, raceways and the...

1.4 Product range 1.4.1 Product overview LLUHC ... A Flanged carriage Standard length, standard height Further information on page 36 LLUHC ... LA Flanged carriage Extended length, standard height Further information on page 37 LLUHR Profile rail with standard hole caps Further information on page 40 LLUHR ... D6 Profile rail with brass hole plugs Further information on page 40 LLUHU ... R Slim-line carriage Standard length, extended height Further information on page 38 LLUHR ... D4 Profile rail with blind holes Further information on page 40 LLUHR ... D8 Profile rail with steel hole plugs...

EWELLIX 1.4.2 Preferred range Carriage and rail types mentioned on this page belong to the preferred range meaning they are usually available from stock for prompt delivery. Precision class Preload class Carriage type Designations 25 LLUHC 25 A T2 PI LLUHC 25 LA T2 PI LLUHC 25 R T2 PI LLUHC 25 A T2 P3 LLUHC 25 LA T2 P3 LLUHC 25 R T2 P3 RailsSize Precision class Rail length Special Designations 25 P1 4000 LLUHR 25 4000 P1

2 Selection guide Introduction

Definition of the basic dynamic load The load ratings stated in this catalogue have been calcu- rating C The basic dynamic load rating C is the radial load, constant in magnitude and direction, which a linear rolling bearing can theoretically accommodate for a basic rating life represented by a travelled distance of 100 km (according to ISO 14728 Part 1). NOTE: As per ISO 14728 Part 1, it is also permissible to reference a distance of 50 km travelled. In this case, a conversion factor of 1,23 for linear guides with roller recirculation should be applied in order to enable proper comparison...

Profile rail guides - LLU EWELLIX2.1.2 Preload classes 2.1.3 AccuracyPreload and rigidity Precision classes To adjust a profile rail guide to the specific requirements of a given application, it is advisable to choose an appropriate preload. Preload can enhance the performance of an entire linear guiding system and increase the rigidity of the carriage under load. Preload is determined by oversizing between cylindrical rollers and raceways on carriage and rail track. This is ensured by state-of-the-art, high-precision grinding processes carefully matched with rolling elements. Ewellix...