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    SCHNORR® GmbH
    mail@schnorr.de
    +49 7031 302 0
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    1. Schnorr GmbH
    2. Products
    3. Disc Springs
    4. Bearing Preload Springs

    Original SCHNORR®

    Bearing preload springs type “K“

    Preloaded bearing springs have a smaller flank (ratio OD / ID) than standard disc springs due to the small installation space available.
    Some ball bearing applications require a "softer deflection behaviour" at the beginning of deflection. This means a lot of deflection must generated with as little increase in spring force as possible. For this special case SCHNORR®  has developed the slotted bearing springs. Due to the slotted geometry these springs can precisely meet the requirement.

     

    As a result of the very different dimensions of these springs compared with "normal" disc springs as defined in DIN EN 16983, the load and dimensional tolerances of disc springs designed for ball bearings do not coincide with the tolerance values in DIN EN 16983.

    non-slotted
    slotted

    The optimal supplement for ball bearings

    Two problems continually occupy design engineers using bearings, the reduction in noise and the elimination of play in ball bearings. A solution of both these problems has been achieved by Schnorr working in close cooperation with well-known ball bearings manufacturers. The fitting of a special version of our disc springs effectively reduces both problems and frequently results in simpler designs.

     

    Fitting of bearing preload springs
    The drawing illustrates how the outer ring of the ball bearing usually is correctly preloaded using a disc spring “K“ series. Depending on the requirements of the design, one or more disc springs can be used. In some cases it is preferable to preload the inner ring of the bearing. That is why the bore holes of disc springs for ball bearings were chosen in such a way that they match the internal diameter of an other ball bearing size. That way, a disc spring suitable for pushing the external ring of the ball bearing 6302, for example, can also be used to pretension the inner rings of the ball bearings 6205 and 6305.

     

    Key advantages speak for bearing preload springs
    An important advantage of “K“ disc springs is being round.
    That ensures an equal bearing surface when multiple discs are installed. As with standard disc springs, here it also applies  that in alternating arrangement with the constant force the spring deflections add up, while in case of parallel layering (same laying in) with constant spring deflection the loads add up. As all springs have a strongly digressive spring characteristic (great ho/t), the spring force continues to be almost constant over a large deflection range.

    Apart from the compensation for play, this brings the following advantages:

    • The tolerance built up in the assembly can be accomodated without significant change in preload.
    • Length variations due to heat impact are absorbed.
    • Any subsequent axial movement of the assembly does not alter the preload significantly.

     

    Within the  following product finder you will find disc springs manufactured of the following materials:

    • Standard materials acc. to DIN EN 10132-4 

     

    Further versions:
    Furthermore, we also manufacture from special materials.
    For this, please see our material grade overview table​​​​​​​ and contact our sales department.

    Productfinder

    Disc Springs

    Screw & Bolt Locking Systems

    Choose a product type
    Standard Steel
    Choose a product type
    Corrosion Resistant Steel
    Outside Diameter
    De
    6 358
    Inside Diameter
    Di
    3.2 242
    Thickness
    t
    0.15 16
    Force
    F
    0 383017
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    Ordering Dimensions Deflection s/Force F Weight
    Article Number De [mm] Di [mm] t [mm] t' [mm] l0 [mm] h0 [mm] s [mm] F [N] Weight per 1000 pieces [kg]
    247 400 238 161 2.25 0 5.25 3 2.25 1021 423.8
    CAD Download
    Add To Cart
    247 500 248 171 2.5 0 5 2.5 1.88 1005 494.5
    CAD Download
    Add To Cart
    247 600 258 171 2.5 0 5.5 3 2.25 1106 572.2
    CAD Download
    Add To Cart
    247 700 268 181 2.5 0 5.7 3.2 2.4 1155 598.7
    CAD Download
    Add To Cart
    247 800 278 181 2.5 0 6 3.5 2.63 1155 682.7
    CAD Download
    Add To Cart
    247 900 288 191 2.75 0 5.75 3 2.25 1145 783.7
    CAD Download
    Add To Cart
    248 000 298 191 2.75 0 6.35 3.6 2.7 1307 883
    CAD Download
    Add To Cart
    248 100 308 202 3 0 6.1 3.1 2.33 1300 995.2
    CAD Download
    Add To Cart
    248 200 318 212 3 0 6.2 3.2 2.4 1302 1034
    CAD Download
    Add To Cart
    248 300 338 232 3 0 6.6 3.6 2.7 1415 1112
    CAD Download
    Add To Cart
    248 400 358 242 3 0 7 4 3 1424 1281
    CAD Download
    Add To Cart
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    Ordering Dimensions
    Deflection s/Force F
    Weight

    Screw & Bolt Locking Systems

    Choose a product type
    Standard Steel
    Choose a product type
    Corrosion Resistant Steel
    Size
    NM
    1.6 36
    Outside Diameter
    D2
    3.2 70
    Inside Diameter
    D1
    1.7 38
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    Size Ordering dimensions Weight/Quantity
    Article Number Surface Nominal size [mm] D2 [mm] D1 [mm] s [mm] hmin [mm] hmax [mm] Weight per 1000 pieces [kg]
    420 400 blackened 8 13 8.4 0.9 1.4 0.37 CAD Download
    Add To Cart
    451 000 Zn8M + Passivation 8 13 8.4 0.9 1.4 0.37 CAD Download
    Add To Cart
    423 000 blackened 10 16 10.5 1.1 1.6 0.68 CAD Download
    Add To Cart
    451 100 Zn8M + Passivation 10 16 10.5 1.1 1.6 0.68 CAD Download
    Add To Cart
    425 100 blackened 11.1 15.9 11.6 1.05 1.6 0.56 CAD Download
    Add To Cart
    451 200 Zn8M + Passivation 11.1 15.9 11.6 1.05 1.6 0.56 CAD Download
    Add To Cart
    426 200 blackened 12 18 13 1.15 1.7 0.79 CAD Download
    Add To Cart
    451 300 Zn8M + Passivation 12 18 13 1.15 1.7 0.79 CAD Download
    Add To Cart
    427 900 blackened 12.7 19 13.7 1.25 1.8 0.89 CAD Download
    Add To Cart
    451 400 Zn8M + Passivation 12.7 19 13.7 1.25 1.8 0.89 CAD Download
    Add To Cart
    429 100 blackened 14 22 15 1.35 2 1.5 CAD Download
    Add To Cart
    451 500 Zn8M + Passivation 14 22 15 1.35 2 1.5 CAD Download
    Add To Cart
    430 700 blackened 16 24 17 1.55 2.1 1.79 CAD Download
    Add To Cart
    451 600 Zn8M + Passivation 16 24 17 1.55 2.1 1.79 CAD Download
    Add To Cart
    432 400 blackened 18 27 19 1.75 2.3 2.72 CAD Download
    Add To Cart
    451 700 Zn8M + Passivation 18 27 19 1.75 2.3 2.72 CAD Download
    Add To Cart
    433 800 blackened 19 30 20 1.9 2.5 3.79 CAD Download
    Add To Cart
    451 800 Zn8M + Passivation 19 30 20 1.9 2.5 3.79 CAD Download
    Add To Cart
    435 100 blackened 20 30 21 1.85 2.5 3.42 CAD Download
    Add To Cart
    451 900 Zn8M + Passivation 20 30 21 1.85 2.5 3.42 CAD Download
    Add To Cart
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    Ordering dimensions
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    Green Technology

    • Green Energy
    • Green Mobility

    Industries & Solutions

    • Automotive
    • Industry
    • Distribution
    • Individual solutions
    • References & Applications

    Products

    • Disc Springs
    • Safety Washers
    • Load Washers
    • Stamped, Moulded and Fine-Blanked Parts
    • Productfinder

    Expertise & Technologies

    • Disc Springs
    • Screw & Bolt Locking Devices
    • Material & Surfaces
    • Engineering
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    • Supplier Management

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    • Privacy statement

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    Share this page
    Schnorr GmbH 
    Stuttgarter Str. 37
    71069 Sindelfingen-Maichingen
    Phone: +4970313020
    Email: mail@schnorr.de
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