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    GFK25-E Economic


    ★ Support Unit - Economic – Flange fixed side.
    ★ Applied deep-groove bearing.
    ★ Providing the options of high rigidity assembly (without axial play), universal assembly (with axial play).
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    Update:2022.10.20

    Model No.

    GFK25-ER

    GFK25-EG

    Specification

    Material

    S50C

    Surface Finish

    B:Black Dyed

    N:Ni-Plating

    Pre-loaded

    ER:High rigidity assemblyEG:Universal assembly

    Dimensions

    Ød (mm)

    25

    ØR (mm)

    98

    口G (mm)

    79

    T (mm)

    57

    H (mm)

    27

    F (mm)

    30

    ØD (-0.01, -0.03) (mm)

    63

    E (mm)

    59

    Installation (A)

    T1 (mm)

    13

    E1 (mm)

    10

    Installation (B)

    T2 (mm)

    20

    E2 (mm)

    17

    Dimensions

    PCD (mm)

    80

    Ød1 (mm)

    9

    Ød2 (mm)

    15

    Z (mm)

    13

    M1 (mm)

    M5

    口S (mm)

    35

    Recommended

    Processing

    Dimensions

    of 

    Shaft

    Ball Screw Shaft

    ØD (mm)

    28 / 30 / 32

    Shaft End Dia.

    Ød (mm)

    25 (-0.005, -0.014)

    Processing sizes of shaft

    ØA (mm)

    22

    B (mm)

    75

    C (mm)

    18

    Nominal Thread

    M (mm)

    M25 x P 1.5

    L (mm)

    20

    Space Ring Length

    T4 (mm)

    15

     

     

    Support Unit Introduction

     

    ♦   Preload selection and applications

         - Light (L)

              * Machine Requirements:Equipments with small vibration and small thrust, load in one fixed direction. High accuracy is not required. Reduction of frictional force.

              * Application Examples:Laser welder, small CNCmill machine, cutter, welder, automatic tool changer, packing machine, material supply equipment.

         - Medium (M)

              * Machine Requirements:Equipments with load on a post. Equipments with a torque acting on it. Equipments working in one direction. Equipments with low load. Equipments with high accuracy.

              * Application Examples:Automated feeder, linear feeder, automatedpainting machine, precision slide table, Z-axis control on machines, PC board punch machine. Industrial robot, EDM machine, NC lathe.

         - Heavy (H)

              * Machine Requirements:High rigidity, high vibration, high thrust equipments. High load, high torque equipments.

              * Application Examples:Machining center spindle, NC lathe, Z-axis spindle of the machinery, milling machine, grinding wheel feeding of grinding machine.

     

    ♦  Pre-Loaded Description

         - Purpose:1. Increase the rotational accuracy of axle

                            2. Increase the rigidity of axle

                            3. Reduce unwanted clearance

                            4. Reduce vibration and noise while bearing stops.

         - What is bearing preload?:The preload describes the process wherein a permenant thrust road is applied to the bearing, so that the bearing is secure in the groove and has no axial clearence. Apply normal force (N). Measure value of L of a pair of bearings. L=L1+L2. Press these pair of bearings on the covers to apply preload and bring these bearings together

     

    ♦   Selection Notes

    - [ Model ]:Pick up the model according to assembly method.

       Assembly:

              1. Plane mounting:GAK、GBK、GEK、GAF、GBF、GEF、GSW、GSWE、GUN、GTN。

              2. Suspension and spindle mount:GFK、GFF、GRW、GRWE、GUR、GTR。

    - [ Size ]:Decide the size according to the ballscrew shaft O.D., and the center height.

    - [ Grade ]:Standard and economic types for options.

    - [ Pre-loaded ]:Decide pre-loaded of the bearing per needs.

    - [ Surface Finish ]:

                        Black dyed - Regular environment use, low humidity.

                        Nickel plating - Clean room use.

    - [ Bearing category ]:Available Japanese series and Taiwanese series.

     

    Support Unit Assembly models & Steps