Friction-locked shaft-hub connection that can be automated. For shafts with h tolerance zone. Clamping force initiation can be freely configured. Series IK for clamping force initiation from the shaft.

 

  • 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 K Fmax1) Cmin2) M Fa
H6 h5 N mm Nm N
8 12 12 10000 0.3 7 1750
8 12 12 10000 0.3 7 1750
10 15 12 11000 0.4 11 2200
10 15 12 11000 0.4 11 2200
12 18 12 11800 0.4 18 2950
12 18 12 11800 0.4 18 2950
14 20 12 13400 0.5 25 3620
14 20 12 13400 0.5 25 3620
15 22 12 13700 0.5 29 3840
15 22 12 13700 0.5 29 3840
16 22 12 14900 0.5 35 4320
16 22 12 14900 0.5 35 4320
18 25 12 15900 0.6 44 4930
18 25 12 15900 0.6 44 4930
20 32 16 20600 0.6 82 8240
20 32 16 20600 0.6 82 8240
22 35 16 21700 0.6 95 8680
22 35 16 21700 0.6 95 8680
25 37 16 24500 0.7 128 10290
25 37 16 24500 0.7 128 10290
28 40 16 26900 0.7 162 11570
28 40 16 26900 0.7 162 11570
30 42 16 28300 0.7 187 12450
30 42 16 28300 0.7 187 12450
32 48 21 32400 0.8 259 16200
32 48 21 32400 0.8 259 16200
35 52 21 34400 0.8 307 17540
35 52 21 34400 0.8 307 17540
40 56 21 38900 0.8 404 20230
40 56 21 38900 0.8 404 20230
45 68 26 44700 0.8 553 24590
45 68 26 44700 0.8 553 24590
50 72 26 49400 0.8 679 27170
50 72 26 49400 0.8 679 27170
55 80 31 59000 1 908 33040
55 80 31 59000 1 908 33040
60 85 31 63300 1 1082 36080
60 85 31 63300 1 1082 36080
63 88 31 66000 1 1205 38280
63 88 31 66000 1 1205 38280
65 90 31 67700 1 1298 39940
65 90 31 67700 1 1298 39940
70 100 38 78800 1 1682 48070
70 100 38 78800 1 1682 48070
75 105 38 83400 1 1907 50870
75 105 38 83400 1 1907 50870
80 110 38 88100 1.1 2185 54620
80 110 38 88100 1.1 2185 54620
85 115 38 92700 1.1 2442 57470
85 115 38 92700 1.1 2442 57470
90 120 38 97200 1.1 2799 62200
90 120 38 97200 1.1 2799 62200
95 125 38 101800 1.2 3139 66100
95 125 38 101800 1.2 3139 66100
100 130 38 106500 1.3 3460 69200
100 130 38 106500 1.3 3460 69200
110 140 38 115700 1.4 4136 75200
110 140 38 115700 1.4 4136 75200
120 150 38 125000 1.4 4950 82500
120 150 38 125000 1.4 4950 82500
125 155 38 129600 1.4 5343 85500
125 155 38 129600 1.4 5343 85500
130 160 38 134300 1.5 5759 88600
130 160 38 134300 1.5 5759 88600
140 170 38 143500 1.5 6727 96100
140 170 38 143500 1.5 6727 96100
150 180 38 152800 1.5 7672 102300
150 180 38 152800 1.5 7672 102300

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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