Precise round guidance and clamping with adjustable play. Good value for money and ready-to-use. High degree of radial rigidity. High attenuation. Simple and easy assembly and disassembly, even with large dimensions.

 

  • Examples

    Example 1: Round guide

    Due to the long guidance basis of the guide bushings on a welded machine column, particular attention must be paid to ensuring a precisely flush housing borehole.

    Example 2: Sleeve guide

    In a tailstock, minimal guide play can be achieved here during the installation process. Guide play readjustment is possible at any time. Grease lubrication with facility for occasional re-lubrication is sufficient here.

    Example 3: Column guide

    Guide play adjustment using threaded ring. A locating fit at the threaded ring ensures the necessary rectangular face contact at the guide bushing. The required feed path can be specified when the flange cover has not yet been tightened by turning the threaded ring. The guide bushing is then pre-stressed by tightening the screws at the flange cover.

    Example 4: Sleeve guidance and clamping

    In this example, the working sleeve of a machine tool is precisely guided by two FAK series guide bushings. In the stationary working position of the sleeve or column, clamping using the spring-hardened guide bushing guarantees absolute freedom from play as well as a high degree of radial rigidity in the guide system.

    Example 5: Safety clamping

    Safety requirements (power failures, oil pressure drop) or economic considerations (long clamping and short release times) often call for a mechanically acting clamp. In this case, the FAL series guide bushing is clamped using banks of cup springs (lower half of the picture) and hydraulically released (upper half of the picture).

    Example 6: Guide play compensation

    In the arrangement shown here, an independent guide play setting is possible for each guide bushing. This allows the ever-present minimal influence of the different actual guide bushing dimensions and housing boreholes to be compensated. Where expedient for certain requirements, differing degrees of guide play can be set at the two guide bushings.

  • Benefits

    Competitiveness through technological leadership – a strategy that calls for an economical increase in power density, efficiency and accuracy. Guide bushings create the foundation for this.

    • Low-cost, ready-to-mount guide and clamping bushing.
    • Existing mating play ensures simple mounting even with large dimensions.
    • Optimum guide play adjustment for any operating status.
    • Metallic support between clamped sleeve and housing affords high radial rigidity.
    • Provides typical high damping performance characteristics for slideways.
    • Precise central play restriction and clamping of the sleeve or column.
  • Function

    1. Functional Principle FDK/FDL, FSK/FSL

    The principle is illustrated in a simplified diagram with enlarged thread flank play.

    Connection with assembly play between the housing, guide bushing and centre sleeve.

    First phase of axial pre-stress: Mating play between housing and guide bushing eliminated, firm fit realized.

    After further axial pre-stressing, the guide play between the guide bushing and sleeve is optimally adjusted.

    2. Functional Principle FAK/FAL

    The principle is illustrated in a simplified diagram with enlarged thread flank play.

    Mounting situation: Connection with assembly play between the housing, guide bushing and centre sleeve.

    Guide play adjusted: The guide bushing fits firmly in the housing; guide play between guide bushing and sleeve is optimally adjusted.

    Sleeve clamped: Absolute freedom from play between the sleeve and housing due to tensioned guide bushing.

    Sleeve released for free movement: The guide bushing has released the sleeve with the previously set degree of guide play.

  • Transmittable Forces

    Series FAK/FAL only

    In conjunction with the lubrication, the plastic coating of the guide bushings ensures smoothrunning, low-wear guidance. However, the good sliding properties of the bushing have a detrimental effect on the transmittable forces. Therefore the table values "transmittable forces" should only be regarded as non-binding guideline values.

    F: Maximum permissible clamping force.

    C: Required functional installation space
    Spieth clamping sleeves must be clamped using the controlled application of force. The clamping force cannot be applied in relation to the clamping path. To prevent premature blocking, a "free" functional path "C" must be provided.

    M: Transmittable torque at Fa = 0.

    Fa: Transmittable axial force at M = 0.

    The Fa values are calculated according to

    M and Fa: If both torque and axial forces act on a guide bushing at the same time, check using the following formula whether the resulting torque Mr is transmittable:

    M and Fa: If both torque and axial forces act on a guide bushing at the same time, check using the following formula whether the resulting torque Mr is transmittable:

    If it is not possible to apply the clamping force F, the following formula is used for the approximate determination of the torque Mred which can be transmitted with the given clamping force Fgiv. (<F).

    To ascertain the necessary clamping force for a transmittable torque Mred < M, an approximation is possible using the following formula:

     

    M = Transmittable torque (catalogue value) [Nm]

    Me = Required torque [Nm]

    Mr = Resulting torque [Nm]

    Mred = Reduced transmittable torque [Nm]

    F = Max. perm. clamping force (catalogue value) [N]

    Fae = Required axial force [N]

    Freq. = Required clamping force [N]

    Fgiv. = Given clamping force (<F) [N]

    d1 = Shaft diameter [mm]

Order No. Name
CAD-Download
Diameter in mm Clamping initiation Transmittable forces Dimensions for connection components in mm
d1 d2 K/L Fixing hole Fmax Cmin2) M Fa d3 max d4 min a max
G6 h5 d5 b N mm Nm N
35 52 21 3.8 22 22900 0.4 100 5710 43 50 2.2
35 52 35 3.8 22 22900 0.6 149 8510 43 50 2.2
40 56 21 3.8 24 25900 0.4 131 6550 48 54 2.2
40 56 35 3.8 24 25900 0.6 195 9750 48 54 2.2
45 68 26 3.8 28 29800 0.4 180 8000 58 65 3
45 68 42 3.8 28 29800 0.6 261 11600 58 65 3
50 72 26 3.8 30 32900 0.4 221 8840 62 69 3
50 72 42 3.8 30 32900 0.6 321 12840 62 69 3
55 80 31 3.8 33 39300 0.5 295 10730 70 77 3
55 80 52 3.8 33 39300 0.8 427 15530 70 77 3
60 85 31 4.8 36 42200 0.5 352 11730 75 82 3
60 85 52 4.8 36 42200 0.8 506 16870 75 82 3
65 90 31 4.8 38 45100 0.5 421 12950 80 87 3
65 90 52 4.8 38 45100 0.8 600 18460 80 87 3
70 100 38 4.8 42 52500 0.5 546 15600 88 96 4
70 100 62 4.8 42 52500 0.8 770 22000 88 96 4
75 105 38 4.8 44 55600 0.5 619 16510 93 101 4
75 105 62 4.8 44 55600 0.8 874 23310 93 101 4
80 110 38 4.8 46 58700 0.5 709 17730 98 106 4
80 110 62 4.8 46 58700 0.8 995 24880 98 106 4
85 115 38 4.8 50 61800 0.6 793 18660 103 111 4
85 115 62 4.8 50 61800 0.9 1113 26190 103 111 4
90 120 38 4.8 53 64800 0.6 909 20200 108 116 4
90 120 62 4.8 53 64800 0.9 1234 27420 108 116 4
100 130 38 5.8 58 71000 0.6 1123 22460 118 126 4
100 130 62 5.8 58 71000 0.9 1521 30420 118 126 4
110 140 38 5.8 63 77100 0.6 1342 24400 128 136 4
110 140 62 5.8 63 77100 0.9 1817 33040 128 136 4
120 150 38 5.8 68 83300 0.6 1606 26770 138 146 4
120 150 62 5.8 68 83300 0.9 2165 36080 138 146 4
130 160 38 5.8 73 89500 0.6 1869 30290 148 156 4
130 160 62 5.8 73 89500 0.9 2520 38770 148 156 4
140 170 38 5.8 78 95700 0.6 2185 31210 158 166 4
140 170 62 5.8 78 95700 0.9 2935 41930 158 166 4
150 180 38 5.8 83 101900 0.6 2491 33210 168 176 4
150 180 62 5.8 83 101900 0.9 3349 44650 168 176 4

2) Design specification, not to be confused with actuation travel.

3) d2 > 80 mm = Concentricity to IT4

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info[at]spieth-me.de

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