Profile rail guides - LLR catalogue

Heritage of innovation for technology leadership 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...

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 the world’s leading manufacturer of rolling bearings, Ewellix supplies practically every type of rolling bearing for rotary and linear movements. The standard profile rail guides pro- duced by Ewellix are brought together in this catalogue. Ewellix profile rail guides are accuracy rolling bearings for linear movements and are there- fore suitable for use in most types of machinery. With these profile rail guides it is possible for Ewellix to offer a guide system which achieves a good price/performance ratio. Profile rail guides from Ewellix are available in many designs and sizes, and thanks...

Just as with rotary bearings, the raceways of profile rail guides can be arranged in an X- or O-arrangement. The load carrying capacity of these two arrangements are essentially 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 LLR profile rail guides from Ewellix feature an O-arrangement, based on the contact angle of the rolling elements (⮑ fig. 1). The advantage of this arrangement is that especially in one-axis systems, the moment-related rigidity is higher than comparable...

1.2.1  Components and material specifications 1 Material specifications 1. Recirculation parts: POM (PA6.6) 2. Lubrication nipple: carbon steel 3. Metal front plates: 1.4301 4. Seals: TEE-E 5. Flange screws: carbon steel 6. Thread pins: 1.4301 7. Balls: bearing steel 8. Housing: tempered steel 9. Cover strip retaining clamps: aluminium 10. Clamping screw and nut: 1.4301 11. Rail: tempered steel 12. Cover strip: 1.4301

• Carriages with and without ball chain • High load capacities in all main directions and high moment load capacities • High dynamic performances: v = 5 m/s; amax = 500 m/s2 • Low noise and smooth, light running due to optimised ball recirculation and ideal ball chain geometry • Long term lubrication system • Lube ports with metal threads on all sides. • Full interchangeability due to standardised rail, with or without rail seal cover strip, for all carriage versions • Various accuracy and preload classes • Carriages can be screwed from above or below, depending on type. • Improved stiffness...

Flange short Flange normal Flange long Standard height Standard height Further information see page 22 Further information see page 24 Further information see page 26 Ball chain Standard height Slim line normal High LLRHC xx SA Flange short. Standard height. Optimises noise level and runningLLRHC xx LA Slim line long LLRHC xx A Flange normal. Standard height. Further information see page 34 Flange long. Standard height. Further information see page 36 LLRHC xx R Slim line normal. High. Ball chain Optimises noise level and running behaviour LLRHC xx LR Slim line long. High. Slim line short Slim...

2.1.1  General information The general technical data applies to all rail guides (all carriages and rails). Special technical data is listed separately for the individual designs. Preload classes In view of the different user require- ments, the ball rail guides can be supplied in four different preload classes. Only in the case of preloaded systems. In the case of nonpreloaded systems: amax = 50 m/s2 So as not to reduce the service life, the preload should not amount to more than 1/3 of the bearing load F. Temperature resistance In general, the stiffness of the carriage increases according to...

Friction The friction coefficient µ of the ball rail guide is approx. 0,002 to 0,003 (not including the friction of the seal). As a result of the design with 4 ball rows a 2-point contact exists for all load directions. This reduces fric- tion to a minimum (⮑ fig. 1). Fig. 1 2.1.2  Load rating Definition of the basic dynamic load rating C The radial load, constant in magnitude and direction, which a linear rolling bearing can in theory accommodate for a basic rating life represented by a travelled distance of 105 m (to DIN 636 Part 1). The basic dynamic load ratings in the tables are generally...

vm = mean speed (m/min) v1,v2...vn = travel speeds (m/min) t1,t2...tn = time proportions for v1, v2...vn (%) The formulae for calculating the service life of profile rail guides apply to a stroke length of S ≥ 2 times the carriage length. At lower values the load rating is reduced. Please consult Ewellix. Dynamic equivalent bearing load for calculation of the service life For a fluctuating bearing load the dynamic equivalent loading F is calculated according to formula 5: 3 F13 x s1 + F23 x s2 + ... + Fn3 x sn s = onstant mean load (N) c = onstant loads during stroke lengths s1, c + s2 +, ...sn...

Deflection as a function of preload class and carriage δel. [µm] 60 50 a = Preload 0,02 C (T1) b = Preload 0,08 C (T2) c = Preload 0,13 C (T3) Example: Carriage LLRHC 35 A, Example: Carriage LLRHC 35 LA, a = Preload 0,02 C (T1) b = Preload 0,08 C (T2) c = Preload 0,13 C (T3) Example: Carriage LLRHC 35 U, Example: Carriage LLRHC 35 LU, δel. = elastic deformation F = load