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Four-row linear recirculating ball bearing and guideway assemblies (MAI 91)

Four-row linear recirculating ball bearing and guideway assemblies (MAI 91)
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Four-row linear recirculating ball bearing and guideway assemblies (MAI 91)

Product catalog summary
Introduction
The document outlines the features and benefits of Schaeffler's four-row linear recirculating ball bearing and guideway assemblies. It emphasizes the use of quad spacers for quiet operation and full complement designs for maximum load capacity. These systems are engineered to meet demands for dynamic characteristics, high load capacity, compactness, low maintenance, and high reliability, with a focus on low-noise operation.
Low-Noise Guidance System
Schaeffler has developed plastic spacer elements, known as QUAD SPACERS, to minimize noise in linear guidance systems. These spacers prevent collision noise by ensuring that the balls do not contact each other, resulting in quieter operation. The design also reduces bending and tensile stresses, lowering the risk of fracture under dynamic conditions or contamination.
Product Features
The KUVE..-B-KT series is noted for its low-noise applications, combining the benefits of the full complement KUVE design. It is suitable for high dynamic characteristics and low noise, with compatibility for existing guideways.
Technical Specifications
  • Preload and friction details are provided, with preload determined by the carriage.
  • Units are lubricated via a lubrication nipple, with options for grease or oil.
  • Modular design allows interchangeability of guideways and carriages, facilitating economical stockholding and versatile design possibilities.
  • Corrosion-resistant designs are available with Corrotect® plating.
Applications
The assemblies are suitable for applications requiring long stroke lengths, high dynamic characteristics, high accuracy, low friction, and low noise levels. They support loads from all directions except the direction of motion and moments about all axes.
Ordering Information
Examples of ordering designations are provided, detailing the specifications for different configurations, including size, version, accuracy class, preload, and corrosion protection.
Conclusion
The document concludes with detailed dimension tables and load carrying capacities for various unit configurations, emphasizing the adaptability and robustness of the KUVE..-B-KT series for diverse industrial applications.
Overview
The document provides detailed specifications and guidelines for the KUVE series of four-row linear recirculating ball bearing and guideway assemblies. These assemblies are designed for high load capacities, precision, and versatility in various industrial applications.
Specifications
  • The assemblies support loads from all directions except the direction of motion and moments about all axes.
  • They are preloaded, with preload determined by the carriage.
  • Lubrication is facilitated via a nipple in the end piece, with options for grease or oil.
  • Operating conditions include accelerations up to 150 m/s², speeds up to 360 m/min, and temperatures from -10°C to +100°C.
Design Features
  • The carriages feature a steel saddle plate with hardened and precision-ground raceways.
  • Guideways are made of hardened steel with precision-ground surfaces.
  • Interchangeability allows for flexible combinations of carriages and guideways, enhancing stock management and replacement part sourcing.
Corrosion Resistance
  • Available with Corrotect® plating for enhanced corrosion resistance.
  • Suffixes RRF and RRFT indicate anti-corrosion protection for carriages and guideways.
Lubrication and Sealing
  • Integral lubricant reservoirs extend relubrication intervals, potentially making the assemblies maintenance-free.
  • Sealing strips and elastic wipers protect against contamination.
Ordering Information
  • Examples provided for ordering designations, detailing size, version, preload, and protective coatings.
  • Dimensions and load ratings are specified for various models, ensuring suitability for specific applications.
Applications
  • Suitable for applications requiring long stroke lengths, high loads, and high positional accuracy.
  • Designed for low friction and high rigidity environments.
See more

Catalog excerpts

Four-row linear recirculating ball bearing and guideway assemblies (MAI 91)-1

Dynamic characteristics, high load carrying capacity, little space requirement, small moving masses, low-maintenance or maintenance-free, high operational reliability. These are the demands now made on linear bearing arrangements and are fulfilled to a greater or lesser degree by the various guidance system concepts available. In many applications, however, a further central characteristic has been added to these: low-noise running . Low-noise guidance system Running noise in linear guidance systems can be reduced by various methods. Schaeffler has decided to adopt plastic spacer elements so-called QUAD SPACERS. One quad spacer accommodates two rolling elements each from the compressive and tensile race- way. Since the balls are not in contact with each other, there is no collision noise. This reduces the noise in the recirculating system and the guidance systems run significantly more quietly. Since the quad spacers are not connected chain elements, bending and tensile stresses are eliminated, particularly in the return area. Under highly dynamic operating conditions or with ingress of contaminant particles into the guidance system, this design also averts the risk of fracture.With its new linear recirculating ball bearing and guideway assembly KUVE..-B-KT, Schaeffler is providing a technologically pioneering product for low-noise applications. This linear guidance system possesses all the advantages of the highly successful full complement KUVE design and represents an optimum addition to the already extensive range of these units. In this way, the INA range now includes the ideal product for any application.The KUVE..-B-KT is particularly suitable where the emphasis is on high dynamic characteristics and low noise.Both new carriage versions can be used on the existing guideways. Full complement guidance system The established and proven full complement KUVE series has been completely revised in technical terms. Due to the full complement concept, the KUVE..-B version has a high load carrying capacity. It is therefore used where the emphasis is on dynamic characteristics as well as maximum load carrying capacity and rigidity. > 173 775a

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Four-row linear recirculating ball bearing and guideway assemblies (MAI 91)-3

KUVE..-B-KT Four-row linear recirculating ball bearing and guideway assembly with quad spacers scope of basic delivery KUVE..-B-KT > M k ֋C 173 695 Standard accessories > plastic dummy guidewaysprevent damage to the rolling element set while the carriage is separated from the guideway. The carriage is always pushed direct from the guideway onto the dummy guideway > two-piece plastic closing plugsclose off the counterbores of the guideway holes flush with the top surface of the guideway >

 Open the catalog to page 3
Four-row linear recirculating ball bearing and guideway assemblies (MAI 91)-4

Design of carriages > Contact angle, quad spacers The rows of balls run in a steel saddle plate with hardened and ground raceways at a contact angle of 45 in an O arrangement. In order to prevent noise from recirculation, the rolling elements are guided in plastic spacer units called Гquad spacers. The balls are recirculated in enclosed channels with plastic return elements. > 45ԋ Interchangeability The guideways and carriages can be freely interchanged and combined with each other (see page 5).This means: ڢ֠ more economical stockholding ■ simpler fitting > 173 733 ■ quicker sourcing of replacement...

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Four-row linear recirculating ball bearing and guideway assemblies (MAI 91)-7

KUVE..-B-KT Guideway Guideway for carriageTKVD Size25 Guideway length1570 mm a Ordering example 2 Linear recirculating ball bearing and guideway assembly KUVE..-B-KT, carriage and guideway separate, symmetrical hole pattern Ordering designation: Carriage > L 35 mm35 mm CarriageKWVE Size25 Version with plastic spacer elementsB-KT Carriage variantL Accuracy classG3 Carriage preloadV2 ֖ a Ordering designation: > R 1 TKVD25/1570-35/35 (Figure 2). 2 KWVE25-B-KT-L-G3-V2 (Figure 2). > Figure 2 Ordering example, ordering designation >

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Four-row linear recirculating ball bearing and guideway assemblies (MAI 91)-8

Dimension table Dimensions in mm Unit Carriage Guideway Dimensions Designation Designation Mass Designation Mass Closing plug l > max1) H B L m m K > 2 kg kg/m KUVE15-B-KT KWVE15-B-KT 0,17 59,6 TKVD15-B(-U) > 7) 1,44 KA07-TN/A 1200 24 47 KUVE15-B-KT-L KWVE15-B-KT-L 0,21 73 KUVE20-B-KT KWVE20-B-KT 0,38 69,8 TKVD20(-U) 2,2 KA10-TN/A 1980 30 63 KUVE20-B-KT-L KWVE20-B-KT-L 0,5 87,3 KUVE25-B-KT KWVE25-B-KT 0,5 82,1 TKVD25(-U) 2,7 KA11-TN/A 1980 36 70 KUVE25-B-KT-L KWVE25-B-KT-L 0,62 107,9 > 1) Maximum length of single-piece guideways; longer guideways are supplied in several sections and are marked...

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Four-row linear recirculating ball bearing and guideway assemblies (MAI 91)-9

KUVE..-B-KT Locating faceMarking L Locating face Marking 1 JBADIN 71412-B M6 2B6) K 1 X G 2 311 55 L j L a R HTHh lJ K 3 HhA L L4a A L1max Ab 1 173 683 173 684

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Four-row linear recirculating ball bearing and guideway assemblies (MAI 91)-11

KUVE..-B-KT Locating faceMarking JBADIN 71412-B M6 Locating face Marking L 1 2B6) A L1 X G 2 K 1 311 55 HTHh Lmax j L a R lJ HhA L L4a Ab 1 173 688 173 689

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Four-row linear recirculating ball bearing and guideway assemblies (MAI 91)-13

Four-row linear recirculating ball bearing and guideway assembly, full complement scope of basic delivery KUVE..-B > M k KUVE..-B ֋C 173 789 Standard accessories > plastic dummy guidewaysprevent damage to the rolling element set while the carriage is separated from the guideway. The carriage is always pushed direct from the guideway onto the dummy guideway > two-piece plastic closing plugsclose off the counterbores of the guideway holes flush with the top surface of the guideway >

 Open the catalog to page 13
Four-row linear recirculating ball bearing and guideway assemblies (MAI 91)-14

Design of carriages > Contact angle The rows of balls run in a steel saddle plate with hardened and ground raceways at a contact angle of 45 in an O arrangement.The full complement ball set is recirculated through channels in the steel saddle plate. Interchangeability > 45Ћ The carriages and guideways can be freely interchanged and combined with each other.This means: > 45ڋ ڢ֠ more economical stockholding ■ simpler fitting ■ quicker sourcing of replacement parts ■ the option of achieving several preload classes on one guideway, since the preload class is determined by the carriage > 173 178 ■...

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Four-row linear recirculating ball bearing and guideway assemblies (MAI 91)-17

Guideway Guideway for carriageTKVD Size25 Guideway length1570 mm a Ordering example 2 Linear recirculating ball bearing and guideway assembly KUVE..-B, carriage and guideway separate, symmetrical hole pattern Ordering designation: Carriage > L 35 mm35 mm CarriageKWVE Size25 Version with full complement ball setB Carriage variantL Accuracy classG3 Carriage preloadV2 Ordering designation: ֖ a > R 1 TKVD25/1570-35/35 (Figure2). > KUVE..-B 2 KWVE25-B-L-G3-V2 (Figure2). > Figure 2 Ordering example, ordering designation >

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