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THK RU Instruction Manual

Cross-roller ring
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THK Linear Motion System
Cross-Roller Ring
Instruction Manual
No. 1038-T59006

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  • Page 1 THK Linear Motion System Cross-Roller Ring Instruction Manual No. 1038-T59006...

  • Page 2: Table Of Contents

    Table of Contents Introduction Acknowledgment ――――――――――――――――――――――――――― 1-1 About this manual ――――――――――――――――――――――――――― 1-2 How to use this product ―――――――――――――――――――――――― 1-3 Product support ―――――――――――――――――――――――――――― 1-3 Product and company information ―――――――――――――――――――― 1-3 Handling precautions Safety warning indications ――――――――――――――――――――――― 2-1 Handling ――――――――――――――――――――――――――――――― 2-1 Precautions on use ―――――――――――――――――――――――――― 2-2 Lubrication ――――――――――――――――――――――――――――――...

  • Page 3: Introduction

    The cross-roller ring is given an anti-rust treatment and sealed before being packaged. (Figure 1-1) When storing the cross-roller ring, pack it as designated by THK and store it in a horizontal posi- tion away from high or low temperatures and high humidity.

  • Page 4: About This Manual

    ● We have made all possible efforts to ensure the accuracy of this manual’s contents. However, if you find any mistakes or have any questions about this manual, please contact THK. ● Drawings show representative examples, which may differ from your product.

  • Page 5: How To Use This Product

    ● This product must not be used for devices or systems that are utilized under situations that may affect human life. ● Be sure to contact THK in advance if you are considering using this product for special appli- cations, such as with devices or systems relating to passenger vehicles, medicine, aerospace, nuclear power, or electric power.

  • Page 6: Handling Precautions

    2. Precautions Handling precautions Safety warning indications This manual uses the following warning indications for matters involving safety. Be sure to obey the text next to the warning indication, which contains important safety information. Warning Incorrect handling may result in death or serious injury.

  • Page 7: Precautions On Use

    2. Precautions Handling precautions Precautions on use C A U T I O N ⿟ Prevent foreign materials, such as cutting chips or coolant, from entering the product. Failure to do so could damage the product. ⿟ Use a cover to prevent foreign materials such as cutting chips, coolant, corrosive solvents, or Contaminant warning water from getting in the product when it is used in an environment where such a thing is likely.

  • Page 8: Lubrication

    Storage When storing the cross-roller ring, pack it as designated by THK and store it indoors in a horizontal position away from high or low temperatures and high humidity. Please note that if the product has been kept in storage for an extended period, the lubricant inside may have deteriorated.

  • Page 9: Installation

    3. Installation Installation Installation procedure Follow the procedure below to install the cross-roller ring. Preparing for installation (1) Thoroughly clean the housing and other assembly parts, and make sure there are no burrs. (2) If the seam of the split outer ring or inner ring is off-center, lightly adjust with a plastic hammer before inserting.
  • Page 10 Mounting orientation for Models RU and RAU Models RU and RAU have insertion holes for installing rollers in the outer ring. (Filler plugs are attached.) Pay attention to the mounting orientation so that the filler plugs do not overlap with the area under maximum load.
  • Page 11 Mounting the presser flange Mount the presser flange onto the single-piece ring (inner ring on Models RB and RA, outer ring on the Model RE). In case of Models RU and RAU, mount the presser flange onto the rotational axis side.

  • Page 12: Recommended Tightening Torque For The Presser Flange And Press Bolts

    3. Installation Installation Recommended tightening torque for the presser flange and press bolts 　 Use a torque wrench to firmly tighten the press bolts so that there is no looseness. Table 3-1 gives the tightening torque for bolts with a tensile strength grade of 12.9 and a housing and presser flange made of common medium-hard steel.

  • Page 13: Lubrication

    The final greasing interval/amount should be set at the actual machine. Note) The standard models contain THK AFB-LF Grease (a lithium-based grease). Oil lubrication When lubricating with oil, the product will be shipped with VG68 oil. If using another type of lubricant, please specify it when ordering.

  • Page 14: Lubrication Method

    4. Lubrication Lubrication Lubrication method The cross-roller ring can be lubricated manually by using a grease gun or manual pump, or a forced greasing method can be employed with an automatic pump. The grease nipple and pipe fitting must also be installed in a location that is suited to the mounting orientation in order to efficiently lubricate the product.
  • Page 15 Appendix Revision history The instruction manual number is indicated on the back cover. Date of issue Instruction manual No. Details March 2022 No.1038-T59006 First version...
  • Page 16 Inquiries Website URL: https://www.thk.com/eng/ Technical support site URL: https://tech.thk.com/ No. 1038-T59006...

This manual is also suitable for:

Ra-cRau

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