Friction-locked shaft-hub connection for shafts with an h-tolerance zone. Clamping force initiation can be freely configured. Series AL for clamping force initiation from the borehole.

  • Examples

    Example 1: Blade wheel fixture with two clamping sleeves type IK

    The clamping sleeves arranged over a wide basis exert a positive influence on run-out accuracy and rotating flexural stress of the shafthub fit. The degree of torque which can be transferred with two consecutively arranged clamping sleeves is approx. 30 % higher than when using a single clamping sleeve.

    Example 2 – 4: Plug-in connections

    This shaft-hub connection is completely free of play and can be released an unlimited number of times. The tightening torque levels for clamping force initiating screws depend on the required clamping force for each individual clamping sleeve.

    Example 2

    Clamping sleeve type IL with clamping force initiated by tension screw.

    Example 3

    Clamping sleeve type AL with clamping force initiated by set screw.

    Example 4

    Clamping sleeve type AL with clamping force initiated by hollow screw.

     

    Example 5: Spindle sleeve clamped by two clamping sleeves type AK

    The sleeve is hydraulically tensioned and precisely centred. Free movement is immediately possible in the un-tensioned state. The axial thrust created during the clamping process with single arrangement of a clamping sleeve is theoretically balanced out in this case by forces working in opposition. In practice, however, in case of a freely located sleeve, allowance must be made for a slight residual thrust as it is not possible to create identical clamping conditions at the clamping sleeves.

    Example 6: Bevel wheel fixture by clamping sleeves type IK

    This connection is characterized by simple connecting components, a high degree of concentricity and absolute freedom from play.

    Example 7: Pulley fixture by clamping set type DSM

    The hub can be made of an aluminium alloy. Observe the minimum strength specification. High temperatures can impair retention force.

    Example 8: Indexing plate clamped with a clamping set type DSM

    Indexing plate in alloy material at the shaft end of an indexing gear. Here, precise concentricity and run-out are vital.

    Example 9: Gear fixture by clamping set type DSL

    To satisfy the highest concentricity requirements, we recommend mounting a control facility on the gear to allow the concentricity to be checked and adjusted if necessary.

    Example 10: Pressure roller fixture by using two clamping sets type DSL

    Here, two long clamping sets are used to achieve high overall radial rigidity due to intensive tensioning of the shaft and hub. The pressure roller is exchanged by pulling the shaft out of the bearings.

    Example 11: Rocker arm fixture by using a clamping set type DSK

    The peripheral and axial position can be ideally adjusted during assembly.

    Example 12: Guide column clamped with a clamping set type DSL

    Fixture of a guide column in the machine body.

  • Benefits

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

    Lower Resource Input

    • Simple configuration of connecting components.
    • Simple installation and dismantling of all components thanks to mating play.
    • Minimum axial drag during clamping process.
    • Clamping force initiation can be freely configured.
    • Quick-release connection.

    More Success

    • High level of concentricity.
    • Minimised vibrational excitation.
    • High torque levels and axial forces.
    • Suitable for alternating torsion.
    • Axial and angular position freely adjustable.
    • Preserves connecting components.
    • Connection can be automated/switched.
    • Re-usable.

    Four unique features – numerous benefits

    • Precise
      All functional surfaces that determine precision are machined to the finest geometrical and positional tolerances.
       
    • Single-piece design
      Unlike tapered clamping sets, the single-piece steel body does not have any joints that could compromise tolerances. This ensures that the high degree of precision achieved in the manufacturing process can also be brought to bear in the relevant application.
       
    • Self-centering
      When subjected to axial compression, the unique geometry of the absolutely symmetrical base body ensures uniform transverse contraction in the direction of the shaft and hub. The resulting centring effect is equivalent to that of the hydro-expansion principle, only much simpler, safer and stiffer.
       
    • Intelligent
      Cylindrical clamping sets exert very low levels of wear on their connecting components. Significantly better clamping homogeneity at the contact surfaces eliminates any possibility of peak clamping force acting at specific points, which frequently lead to damage and installation problems. At the same time, the Spieth design in the tensioned state is equivalent to the combination of a knee lever and a spring compressed against a block, thus guaranteeing an extremely rigid connection. And when released, the cylindrical clamping set easily returns to its original shape.
  • Function

    Functional principle

    Shown here is the using of a clamping set from series DSK with an integrated clamping screw.
    The principle is illustrated in a simplified diagram with enlarged play.

    Clamping set released, easy installation or dismantling with mating play.

    Clamping set clamped, connection is centred with a high load capacity. No lateral displacement during tightening. This ensures ultrahigh precision centring and optimum concentricity.

  • Transmittable Forces

    DSK / DSL / AK / IK / AL / IL

    The specifications provided in the table apply to a bore tolerance of H7 and a shaft tolerance of h5 in the connecting components. For an h6 shaft, in the most unfavourable scenario, a reduction of transmittable forces of approx. 10 % may be expected.

    DSM
    The specifications provided in the table apply to a bore tolerance of H7 and a shaft tolerance to DIN 748 (k6/m6).

    M: Transmittable torque at Fa = 0
    The specified values were ascertained in a series of tests, in which the connecting components were made of C45 steel, produced with the stipulated surface quality.

    Fa: Transmittable axial force at M = 0
    The Fa values are calculated according to

    Subjection of the clamped connection to steady, pulsating, alternating or sudden stress has no impact provided that the occurring peak forces do not exceed the catalogue values. The risk of fretting corrosion is always a possibility in friction-locked connections subjected to alternating torsion or rotating bending stress. This phenomenon can complicate dismantling and can be prevented by complying with the following instructions:

    Perm. alternating torsion

    Perm. rotating bending stress

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

    M = Transmittable torque (catalogue value) [Nm]

    Me = Required torque [Nm]

    Mr = Resulting torque [Nm]

    Fae = Required axial force [N]

    d1 = Shaft diameter [mm]

    For series AK/IK, AL /IL only

    F: Maximum permissible clamping force
    To avoid the danger of fatigue failure and fretting corrosion, the clamping sleeves should be tensioned in case of high clamping/release cycle frequencies to a maximum of 0.75 F.

    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.

    Automated operation
    In the case of automated operation, for example, using hydraulic actuation, a variety of influencing variables can cause the actual values of the system to deviate from the catalogue values. For this application scenario, we strongly recommend that you verify the force or torque values required. In this application, care must be taken to ensure that the installation is completely free of axial play. To avoid fatigue failure and due to the danger of fretting corrosion, in case of high clamping/release cycle frequencies, the clamping sleeves should be tensioned at a maximum of 0.75xF.

    General
    If it is not possible to apply the clamping force F, the following formula is used for 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]

    Mred = Reduced transmittable torque [Nm]

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

    Fae = Required axial force [N]

    Ferf = Required clamping force [N]

    Fgeg = Given clamping force (<F) [N]

Order No. Name
CAD-Download
Diameter in mm Clamping initiation Transmittable forces
d1 d2 L Fmax1) Cmin2) M Fa
H6 h5 N mm Nm N
8 12 19 10000 0.5 12 3000
8 12 19 10000 0.5 12 3000
10 15 19 11000 0.6 21 4200
10 15 19 11000 0.6 21 4200
12 18 19 11800 0.7 35 5900
12 18 19 11800 0.7 35 5900
14 20 19 13400 0.8 49 6970
14 20 19 13400 0.8 49 6970
15 22 19 13700 0.8 54 7260
15 22 19 13700 0.8 54 7260
16 22 19 14900 0.8 64 8050
16 22 19 14900 0.8 64 8050
18 25 19 15900 0.9 80 8900
18 25 19 15900 0.9 80 8900
20 32 26 20600 0.9 124 12360
20 32 26 20600 0.9 124 12360
22 35 26 21700 0.9 143 13020
22 35 26 21700 0.9 143 13020
25 37 26 24500 1.1 190 15190
25 37 26 24500 1.1 190 15190
28 40 26 26900 1.1 237 16950
28 40 26 26900 1.1 237 16950
30 42 26 28300 1.1 272 18110
30 42 26 28300 1.1 272 18110
32 48 35 32400 1.2 389 24300
32 48 35 32400 1.2 389 24300
35 52 35 34400 1.2 457 26140
35 52 35 34400 1.2 457 26140
40 56 35 38900 1.2 599 29950
40 56 35 38900 1.2 599 29950
45 68 42 44700 1.2 804 35760
45 68 42 44700 1.2 804 35760
50 72 42 49400 1.2 988 39520
50 72 42 49400 1.2 988 39520
55 80 52 59000 1.5 1314 47790
55 80 52 59000 1.5 1314 47790
60 85 52 63300 1.5 1557 51910
60 85 52 63300 1.5 1557 51910
63 88 52 66000 1.5 1725 54780
63 88 52 66000 1.5 1725 54780
65 90 52 67700 1.5 1848 56870
65 90 52 67700 1.5 1848 56870
70 100 62 78800 1.5 2372 67770
70 100 62 78800 1.5 2372 67770
75 105 62 83400 1.5 2690 71720
75 105 62 83400 1.5 2690 71720
80 110 62 88100 1.6 3065 76650
80 110 62 88100 1.6 3065 76650
85 115 62 92700 1.6 3427 80650
85 115 62 92700 1.6 3427 80650
90 120 62 97200 1.6 3802 84500
90 120 62 97200 1.6 3802 84500
95 125 62 101800 1.8 4251 89500
95 125 62 101800 1.8 4251 89500
100 130 62 106500 2 4685 93700
100 130 62 106500 2 4685 93700
110 140 62 115700 2.1 5599 101800
110 140 62 115700 2.1 5599 101800
120 150 62 125000 2.1 6672 111200
120 150 62 125000 2.1 6672 111200
125 155 62 129600 2.1 7206 115300
125 155 62 129600 2.1 7206 115300
130 160 62 134300 2.2 7767 119500
130 160 62 134300 2.2 7767 119500
140 170 62 143500 2.2 9037 129100
140 170 62 143500 2.2 9037 129100
150 180 62 152800 2.2 10314 137520
150 180 62 152800 2.2 10314 137520

1) Max. perm. clamping force. For automated operation, the clamping sleeve should be clamped with max. 0.75xF.
2) Design specification, not to be confused with actuation travel. For explanations, see p. 55.
3) d2 > 80 mm = Concentricity to IT4

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