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SLIDE GUIDE

SLIDE GUIDE

Product catalog summary

Slide Guide Overview
NB slide guides are high-precision, high-rigidity linear bearings designed for smooth linear motion with low friction and no stick-slip, even under high load conditions. They are suitable for a wide range of applications from general industrial to precision machinery.

Types
1. Retained ball type: 2-row, 4-point contact, compact, cost-effective, available in stainless steel.
2. Cross roller type: Miniature roller guide, high precision, available in stainless steel.
3. 4-row, 2-point contact types (SGL and SGW): High load capacity, high dust prevention, available in stainless steel.

Accuracy Measurement Method
Accuracy is measured by fixing the rail to a reference base and is expressed in terms of average values at the center. Dimensional tolerance and paired differences are measured for height and width.

Rigidity and Preload
Elastic deformation of rolling elements occurs due to applied loads. Preload increases rigidity but may reduce lifetime. Four levels of preload are available: clearance, standard, light, and medium.

Load Rating and Rated Life
Load ratings and allowable static moments are defined for each load and moment. Rated life is calculated differently for ball and roller elements, considering factors like contact and temperature coefficients.

Mounting
Slide guides can be mounted in various configurations. Accurate mounting requires careful attention to the mounting surface and preload specifications. Reference surfaces aid in accurate and simplified mounting.

Joint Rails
Rails can be joined to exceed maximum lengths, with joints placed strategically to minimize impact on accuracy.

Use and Handling Precautions
Proper handling and installation are crucial to maintain the performance and longevity of slide guides. Careful attention to mounting procedures and surface conditions is necessary.

Specifications and Installation Guidelines
1. Joint Installation: Ensure joints have shoulders to prevent misalignment due to shock loading. If shoulders are not possible, ensure excess load does not alter rail position. Use provided joint marks for installation and ensure rails are tightly butted with no gaps. Align the reference surface side of joint rails.
2. Slide Guide Handling: Install Slide Guides as a set without removing the block. If removal is necessary, use a temporary rail to prevent ball loss. Align reference surfaces when placing guide blocks on rails. Do not disassemble blocks as it voids the warranty. Remove debris before installation and regularly relubricate with compatible grease.

Dust Prevention and Sealing Options
1. Seals: Side-seals and under-seals are available for various series to prevent dust entry and maintain motion accuracy. Double side-seal and scraper options are available for enhanced dust prevention.
2. Bellows: Fully cover guide rails to prevent dust and debris interference. Special rail mounting caps are available to prevent dust entry into mounting holes.

Anti-Corrosion and Lubrication
1. Materials: Stainless steel options are available for anti-corrosion. Low temperature black chrome treatment is available for certain series.
2. Lubrication: Pre-lubricated with lithium soap-based grease. Fiber Sheets and Reverse-Seals extend relubrication intervals and reduce grease loss.

Advanced Features
1. Fiber Sheet: Extends lubricant replenishment intervals and maintains durability under harsh conditions.
2. Reverse-Seal: Creates a grease pocket to minimize leakage and extend maintenance intervals.

Design and Structural Advantages
1. SEB Type: Compact design with a 2-row, 4-point contact structure for reduced size and weight. Available in various block shapes and rail installation methods.
2. AD Profile: Dissipates deformation caused by installation, enhancing performance.

Accuracy and Grades
SEB(S) slide guides are available in high grade and precision grade for accuracy, catering to different application needs.

Specifications:
The document outlines the specifications for SEB(S) slide guides, including allowable dimensional differences in height (H) and width (W), and running parallelism of surfaces. Precision and high-grade options are available, with specific tolerances provided for each.

Preload and Clearance:
SEB(S) slide guides are available with standard, light, and positive-clearance preload options. The preload symbol and radial clearance are detailed in tables, indicating the appropriate preload for various operating conditions.

Load Rating:
The load rating for SEB(S) slide guides varies based on the direction of the load. Basic dynamic and static load ratings are provided for both vertical and horizontal loads, with specific multipliers for retained and non-retained ball types.

Rail Length and Mounting:
Standard rail lengths are available, with guidelines for non-standard lengths. The document provides equations for calculating rail length and details on mounting surface profiles, including recommended shoulder heights and corner radius values.

Torque and Screws:
Recommended torque values for mounting screws are provided, along with specifications for custom screws. The importance of equal torque application to ensure motion accuracy is emphasized.

Lubrication:
NB slide guides are pre-lubricated with high-grade lithium soap-based grease. Options for grease-free guides for clean rooms or vacuum environments are available, and a special syringe lubricant dispenser is offered.

Part Number Structure:
The document explains the part number structure for SEBS-BS/B/BY and SEBS-BSM/BM/BYM types, detailing options for accuracy grade, rail mounting hole type, preload symbol, and other features.

Figures and Tables:
Figures and tables throughout the document provide visual guidance on dimensions, preload symbols, load ratings, and mounting specifications, enhancing the clarity of the technical information presented.

Overview: The document provides detailed specifications and guidelines for the SEBS and SER types of slide guides, which are linear motion bearings used in various applications requiring high load capacity and compactness. The document includes information on dimensions, load ratings, and installation methods.

Specifications: The slide guides are available in different configurations, including standard and wide block designs. They are made from stainless steel for anti-corrosion purposes and are available with or without side-seals. The document specifies the dimensions, load ratings, and allowable static moments for different models, such as SEBS 2A, 3A, 5A, 7A, and their anti-corrosion counterparts.

Procedures: Installation guidelines are provided, including the use of counterbore or tapped hole rails for mounting. The document outlines the importance of aligning the reference surface of the rail and block against the shoulder on the mounting surface to ensure proper installation.

Standards and Accuracy: The slide guides are available in high-grade and precision-grade accuracy, with specific tolerances for dimensional differences in height and width, as well as running parallelism. The document includes tables detailing these tolerances and the corresponding accuracy symbols.

Recommendations: For applications requiring high moment loading capacity, the wide block design (WA type) is recommended. The document also advises on the use of joint rails when the required length exceeds the maximum standard length.

Key Data: The document includes tables with detailed dimensions, load ratings, and allowable moments for various models. It also provides equations for calculating the total length of the rail based on the number of pitches and hole pitch.

Conclusion: The SEBS and SER slide guides offer high load capacity and compactness, making them suitable for demanding applications. The document provides comprehensive specifications and guidelines to ensure proper selection and installation of the slide guides.

Specifications:
The document provides detailed specifications for SGW type slide guides, including shoulder height and radius dimensions for various part numbers (SGW17, SGW21, SGW27, SGW35). It also includes preload levels (standard, light, medium) and their corresponding radial clearance values in micrometers.

Grease Fitting:
A grease fitting is attached to the return cap of the SGW type guide block for lubrication. The orientation of the grease fitting is specified, and customization is available when more than two blocks are used on one rail.

Preload Levels:
Three preload levels are available: standard (blank), light (T1), and medium (T2). Each level is associated with specific operating conditions and radial clearance values.

Operating Conditions:
The document outlines the appropriate preload levels for various operating conditions, such as vibration, torsional load, and shock.

Dimensions and Load Ratings:
Detailed dimensions and load ratings for SGW-TF and SGW-TE types are provided, including dynamic and static load ratings, allowable static moments, and assembly dimensions.

Rail and Block Information:
Information on rail lengths, block sizes, and the number of blocks per rail is included. The document also specifies the types of grease available and the accuracy grades for the slide guides.

Additional Features:
Options for rail mounting hole caps, seals, and the number of axes are discussed. The document notes that rails exceeding the maximum specified length can be fabricated with joints.

Catalog excerpts

SLIDE GUIDE SLIDE GUIDE SGL Type TYPES・・・・・・・・・・・・・・・・・・・・・・・・・・・・ A-3 ACCURACY MEASUREMENT METHOD・・・・ A-4 RIGIDITY AND PRELOAD・・・・・・・・・・ A-5 LOAD RATING AND RATED LIFE・・・・ A-6 MOUNTING・・・・・・・・・・・・・・・・・・・・・・・・ A-7 USE AND HANDLING PRECAUTIONS・・・・ A-12 JOINT RAILS・・・・・・・・・・・・・・・・・・・・・・ A-13 DUST PREVENTION・・・・・・・・・・・・・・・ A-14 ANTI-CORROSION・・・・・・・・・・・・・・・・・ A-15 LUBRICATION・・・・・・・・・・・・・・・・・・・・・ A-15 FIBER SHEET・・・・・・・・・・・・・・・・・・・・・・ A-16 REVERSE-SEAL・・・・・・・・・・・・・・・・・・・ A-17 BELLOWS・・・・・・・・・・・・・・・・・・・・・・・・・ A-18 SEB TYPE AD PROFILE (ANTI-DEFORMING)・・・・ A-19 STRUCTURE AND ADVANTAGES・・・・ A-50 BLOCK TYPES・・・・・・・・・・・・・・・・・・・・ A-51 ACCURACY・・・・・・・・・・・・・・・・・・・・・・・ A-51 PRELOAD・・・・・・・・・・・・・・・・・・・・・・・・・ A-52 RAIL LENGTH・・・・・・・・・・・・・・・・・・・・・ A-52 MOUNTING・・・・・・・・・・・・・・・・・・・・・・・・ A-52 GREASE FITTING・・・・・・・・・・・・・・・・・・ A-53 LUBRICATION・・・・・・・・・・・・・・・・・・・・・ A-53 DIMENSION TABLE・・・・・・・・・・・・・・・・ A-54～ SLIDE GUIDE SGW Type STRUCTURE AND ADVANTAGES・・・・ A-72 BLOCK TYPES・・・・・・・・・・・・・・・・・・・・ A-73 ACCURACY・・・・・・・・・・・・・・・・・・・・・・・ A-73 PRELOAD・・・・・・・・・・・・・・・・・・・・・・・・・ A-74 RAIL LENGTH・・・・・・・・・・・・・・・・・・・・・ A-

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SLIDE GUIDE SLIDE GUIDE TYPES Table A-1 Types rolling element cross section and contact structure retained ball type available with all stainless steel components 2-row, compact small, light, cost effective 2-row, compact small, light, cost effective available in various types available in stainless steel miniature roller guide cross roller, high precision available with all stainless steel components ● high self-centering characteristics ● high load capacity due to relatively large ball elements ● high dust preventive control with side-seals and underseals ● available in stainless steel ● high-moment...

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SLIDE GUIDE RIGIDITY AND PRELOAD ACCURACY MEASUREMENT METHOD The accuracy of slide guides is measured by fixing the rail to the reference base. The accuracy is expressed in terms of the average value at the center portion. Dimensional Tolerance and Paired Difference Figure A-1 Accuracy Measurement Motion Accuracy Figure A-2 Measurement Method for Motion Accuracy The rail is first fixed to the reference base. The motion accuracy is obtained by measuring the difference in the indicator readings when the block is moved along the entire span of the rail. Figure A-4 Elastic Deformation of Rolling...

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[NIPPON BEARING LOAD RATING AND RATED LIFE Loading Direction and Load Rating A slide guide experiences load and moment, as shown in Figure A-5. For each load and moment, the basic load ratings and allowable static moments are defined. Figure A-5 Direction of Load load rating Rated Life Calculation Two types of rolling elements are used in NB slide guides: ball and roller elements. There is a different equation for calculating the rated life of each type. If the stroke length and cycles are constant, life can be expressed in terms of time, the equation is Lh: life time (hr) &s: stroke length (m)...

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SLIDE GUIDE Mounting Surface and Accuracy Figure A-7 Profile of Mounting Reference Surface NB slide guides are designed and fabricated to achieve high accuracy after mounting them to a machined mounting base. One typical way is to provide a shoulder on the mounting surface and align the reference surface of the rail or block against the shoulder (Figure A-7). To avoid corner interference, an undercut should be provided at the shoulder corner. Alternatively, the radius of the shoulder corner should be smaller than the radius of the slide guide block/rail corner. The accuracy of the rail mounting...

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SLIDE GUIDE Mounting Procedure Figure A-16 Mounting Method When reference surfaces are provided for both the table and the base, please follow the following procedure to mount the slide guide. 2. Tighten the screw for the side piece so that the installation reference surface and the rail reference surface are in close contact. (Figure A-16b) If a side piece is not provided, use a C clamp to position the mounting reference surface and the rail reference surface so that they contact each other. (Figure A-16d) 3. Tighten the mounting screws to the specified torque, and complete the mounting of the...

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[NIPPON BEARING NB Slide Guides are accurately tuned precision components. Please pay special attention to 9 Please install the Slide Guide as a set. It is not recommended to remove the block for installation. 9 When block removal is necessary, please use a temporary (plastic dummy) rail to prevent balls from 9 To put a guide block on the rail, as the pictures below show, align the reference surface and the height between the rail and a temporary rail. It is very important to maintain the original combination of block(s) Figure A-20 How to Put Guide Block on 9 Please do not turn around a block...

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SLIDE GUIDE DUST PREVENTION Seals Figure A-22 Side-Seal and Under-Seal Side-Seal (Series: SEB, SER, SGL, and SGW) The side-seals prevent foreign particles and dust from entering the guide block in order to retain the motion accuracy, resulting in a long lifetime. Bellows Option (Series: SGL) This option fully covers the guide rail preventing dust, debris, and other foreign particles from disrupting the smooth linear motion. (Refer to page A-18 for further details) SLIDE GUIDE Under-Seal (Series: SGL and SGW) Slide guides with side and under-seals are used in harsh environments or to prevent dust...

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[NIPPON BEARING FIBER SHEET The Fiber Sheet for the SGL and SGW types, significantly extends lubricant replenishment intervals and has an excellent durability even under harsh conditions with dust and debris that absorb lubricant. Embedded in a block body, as shown in Figure A-27, it does not change the length of the block. In addition, the Fiber Sheet does not require any change in mounting dimensions, which allows replacement with existing products without a design change. Figure A-27 Magnified View of the Fiber Sheet Simplified Lubrication Management NB's Fiber Sheet is a fiber material with...

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SLIDE GUIDE BELLOWS By protecting the entire length of the guide rail, dust prevention is greatly enhanced. Please refer to Figure A-33 for dimensions. External dimensions and the stroke length of slide guide will change with use of bellows. Figure A-33 Dimensions of Slide Guide with Bellows part number SEB TYPE AD PROFILE (Anti-Deforming) The AD profile guide block can dissipate possible deformation by improved installation plane profile. Figure A-35 SEB type AD profile table guide block Figure A-34 External Diagram of Slide Guide with Bellows Attached Example: In this case, one(1) piece of...

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