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Locknuts Series MSW

Stellmuttern der Baureihe MSW von Spieth bieten eine zuverlässige Sicherung ohne zusätzliche Nuten und Sicherungsbleche.
Stellmuttern der Baureihe MSW von Spieth können schnell und präzise montiert und demontiert werden.
  • Examples

    Example 1: Tapered roller bearing

    Stellmuttern der Baureihe MSR von Spieth bieten eine zuverlässige Sicherung ohne zusätzliche Nuten und Sicherungsbleche.

    In tapered roller bearings, run-out accuracy, a high level of axial rigidity and dynamic safety create a major contribution to perfect bearing operation: Radial stress applied to the tapered roller bearing generates axial forces (axial rigidity). Due to a lack of axial pretension (no axial friction), the intrinsic safety of the locknut is extremely important.

    Example 2: Ball roller spindle

    Kugelrollspindel

    The use of a locknut gives the bearing of the ball roller spindle a high degree of axial rigidity. Under highly dynamic operating conditions, the high degree of dynamic safety of the locknut represents a major advantage.

    Example 3: Friction clutch

    Rutschkopplung

    A locknut is used here to provide precise and infinitely variable adjustment of the pretension of the spring on a friction clutch. The reliable locking function is of particular importance here.

    Example 4: Main spindle bearing

    Hauptspindellagerung

    The locknut ensures a high level of axial rigidity and excellent concentricity on the main spindle bearing in a turning lathe.

    Example 5: Round axis

    Rundachse

    Not a millimetre is lost in the axial direction and, despite this, there is no need to sacrifice run-out accuracy, axial rigidity or a high degree of dynamic safety.

    Example 6: Table structure

    Tischaufbau

    Due to the flat design, countersunk installation is possible without causing any interfering contours in the table surface. Straining of the structure due to a tilting locknut caused by thread flank play, or even opening under dynamic load are not possible due to the characteristic properties of the locknut.

    Example 7: Tooling spindle

    Werkzeugspindel

    The low installation height of the MSF locknut makes it possible to create a compact drive side of the spindle. This configuration saves valuable installation space and minimises destructive rotating bending stress. At the same time, the benefits of a Spieth high-precision locknut are fully exploited.

    Example 8: Feed drive system

    Vorschubantrieb

    The installation using a locknut reliably transmits the high load-bearing capacity and axial rigidity of the needle axial cylindrical bearing to the feed drive system. The excellent locking properties provided by the locknut are of major importance under dynamic stress.

    Example 9: Piston fixture

    Kolbenbefestigung

    The piston fixture utilizes all the technical benefits of locknuts: Load-bearing capacity, axial rigidity and excellent locking properties.

  • Benefits

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

     

    Lower resource input

    • No additional grooves or locking plates required.
    • Free, infinitely variable and exact positioning.
    • Fast, precise installation results.
    • Simple to dismantle thanks to back-sprung diaphragm.

    More success

    • Optimum locking effect.
    • High degree of run-out accuracy, even in the assembled state.
    • High dynamic loading capacity.
    • High dynamic rigidity.
    • Dynamically balanced structure.
    • Suitable for high speeds.

    4 unique features – numerous benefits

    • Secure
      The locking system enables the application of high clamping forces to ensure that the nut is friction-locked onto the spindle thread. The load is applied to the thread across 360° symmetrically and evenly. The locking force and working load act in the same direction and cannot cancel each other out. This is the requirement for the highest locking effect while at the same time preserving the connecting components.
       
    • Self-centering
      The locking procedure is designed to exert a self-centring effect for the nut on the spindle thread. This is the prerequisite for ensuring a coaxial end position of the nut relative to the spindle and for a vertical orientation of the end face with respect to the connection assembly. For demanding applications, this effect can be used in a separate installation step specifically to minimise thread join play.
       
    • Precise
      All functional surfaces that determine precision are manufactured in a single set-up. And in contrast to other locking concepts, the precision is retained by design once it has been created, even during installation and operation.
       
    • Consistent rigidity
      Irrespective of the degree of pretension in the nut, the closed distribution of locking force ensures an intensive application of the thread flanks in the direction of the working load. The assembly process creates an elastic pretension in the join of the thread pairing, as a result of which the bearing area of the thread flanks and the rigidity of the join are significantly increased. Damaging micro-movements, caused by strong impulses or abrupt changes in the direction of force, are drastically reduced.
  • Function

    Functional Principle

    In this example, based on a type MSF locknut. The principle is illustrated in a simplified diagram with enlarged thread flank play.

    1. Screwing on the locknut

    As with every threaded connection, there is a degree of mating play when the nuts are screwed on. As a result, the nut may be aligned with a parallel and/or angled axial offset relative to the spindle axis; in other words, the contact surface of the nut may be at an incline.

    2. Spieth locknuts: Self-centring and selfaligning thanks to play restriction

    Spieth Stellmutter Funktionsweise

    Unique: Spieth locknuts are automatically self-centring and eliminate mating play (thread flank play) as far as possible. Thanks to play restriction, the locknut centres itself and the contact surface of the engages at right angles to the spindle axis.

    3. Tightening and locking

    The locknut is tightened with the required level of preliminary torque. The lock screws are then locked with the specified level of locking torque. This ensures optimum contact at the thread flanks and maximum concentricity.

    4. Higher levels of operational safety

    Spieth benefit: The previously set locking forces are not cancelled by the working load, but are superimposed and therefore reinforced. Put simply: the forces act in the same direction and are therefore added to each other. The optimum solution that delivers improved safety.

  • Axial pret. Forces

    General

    MV = Pre-tensioning torque of the locknut [Nm]

    FV = Required axial pretension force of the threaded connection [N]

    B = Locknut-specific allowance [N], compensates face end relief due to the locking process

    A = Constant [mm], includes the calculation factors for the respective thread width (catalogue value)

    µA = Frictional coefficient for the end contact surface of the locknut Approximate value μA = 0.1 steel/steel

    rA = Effective friction radius for the end contact face of the locknut [mm]

    From locknut size MSW > M70

    The tightening torque for the set screw is determined according to the following formula:

    MD = Tightening torque per set screw [Nm]

    FV = Required axial pretension force of the threaded connection [N]

    A = Constant [mm], includes the Calculation factors for the respective thread width (catalogue value)

    µD = Frictional coefficient for the end contact face of the set screw, Approximate value = 0.13

    d6 = Dog point dia. of the set screw [mm] (catalogue value)

    n = number of set screws

Order No.
clicca per richiesta
Name
CAD-Download
Diameter in mm Clamping screw calc. factor A calc. factor B Performance Data
d1 d2 d6 h ISO 4762 MA No. Breaking Load Breakaway Torque
ISO-5H c11 Nm mm N kN Nm
K-10402001
MSW 20.28
M20x1,5 42 42 28 M4 2.9 4 1.344 1560 194 40
K-10402002
MSW 20.40
M20x1,5 52 52 40 M4 2.9 4 1.344 936 375 42
K-10402501
MSW 25.28
M25x1,5 47 47 28 M4 2.9 4 1.633 1560 245 54
K-10402502
MSW 25.40
M25x1,5 62 62 40 M4 2.9 4 1.633 936 470 59
K-10403001
MSW 30.28
M30x1,5 52 52 28 M4 2.9 4 1.921 1560 295 68
K-10403002
MSW 30.44
M30x1,5 68 68 44 M4 2.9 4 1.921 936 655 83
K-10403501
MSW 35.28
M35x1,5 60 60 28 M4 2.9 4 2.21 1560 346 83
K-10403502
MSW 35.44
M35x1,5 73 73 44 M4 2.9 4 2.21 936 767 97
K-10404001
MSW 40.28
M40x1,5 65 65 28 M4 2.9 6 2.5 1560 398 134
K-10404002
MSW 40.44
M40x1,5 75 75 44 M4 2.9 6 2.5 936 878 139
K-10404501
MSW 45.28
M45x1,5 70 70 28 M4 2.9 6 2.789 2340 443 149
K-10404502
MSW 45.44
M45x1,5 90 90 44 M4 2.9 6 2.789 1404 982 171
K-10405001
MSW 50.32
M50x1,5 75 75 32 M4 2.9 6 3.079 2340 642 167
K-10405002
MSW 50.46
M50x1,5 95 95 46 M4 2.9 6 3.079 1404 1168 204
K-10405501
MSW 55.46
M55x1,5 100 100 46 M5 6 6 3.369 2286 1208 326
K-10406001
MSW 60.46
M60x1,5 100 100 46 M5 6 6 3.655 2286 1321 438
K-10406501
MSW 65.46
M65x1,5 110 110 46 M5 6 6 3.948 2286 1433 386
K-10407001
MSW 70.46
M70x1,5 115 115 46 M5 6 6 4.238 2286 1551 390

No product found or do you have a special application? We would also be happy to advise you on specialized solutions, which we can custom produce to meet your needs as your development partner. Simply get in contact with us - resp. you can fill out our request form for clamping sets/- sleeves / lock nuts - we’re looking forward to hearing about your project.

Request form for special elements Clamping sets/-sleeves / lock nuts

All information is supplied without liability and subject to technical changes. Please observe the operating instructions.

1) The number of grooves for hook spanner DIN 1810-A corresponds to the number of clamping screws.

 

Locknuts Series MSW heavy

Stellmuttern der Baureihe MSW schwer von Spieth können schnell und präzise montiert und demontiert werden.
Order No.
clicca per richiesta
Name
CAD-Download
Diameter in mm Clamping screw Performance Data
d1 d2 h d4 ISO 4762 MA No. Breaking Load
ISO-5H h11 Nm kN
K-10407201
MSW 72.60
M72x1,5 135 60 105 M5 6 6 2390
K-10408501
MSW 85.60
M85x2 160 60 124 M6 10 6 2600
K-10410501
MSW 105.66
M105x2 190 66 150 M6 10 6 3670
K-10412501
MSW 125.72
M125x2 215 72 172 M6 10 6 4830
K-10414001
MSW 140.78
M140x3 240 78 196 M6 10 8 5810

No product found or do you have a special application? We would also be happy to advise you on specialized solutions, which we can custom produce to meet your needs as your development partner. Simply get in contact with us - resp. you can fill out our request form for clamping sets/- sleeves / lock nuts - we’re looking forward to hearing about your project.

Request form for special elements Clamping sets/-sleeves / lock nuts

All information is supplied without liability and subject to technical changes. Please observe the operating instructions.

Order No.
clicca per richiesta
Name
CAD-Download
Jackscrew
ISO 4028 - 45H d6 MD2) No. calc. factor A
mm Nm mm
K-10407201
MSW 72.60
M10x45 7 34 8 0.92064
K-10408501
MSW 85.60
M12x45 8.5 60 8 1.09913
K-10410501
MSW 105.66
M12X50 8.5 60 9 1.09913
K-10412501
MSW 125.72
M16x55 12 140 9 1.42613
K-10414001
MSW 140.78
M16x60 12 140 9 1.42613

No product found or do you have a special application? We would also be happy to advise you on specialized solutions, which we can custom produce to meet your needs as your development partner. Simply get in contact with us - resp. you can fill out our request form for clamping sets/- sleeves / lock nuts - we’re looking forward to hearing about your project.

Request form for special elements Clamping sets/-sleeves / lock nuts

All information is supplied without liability and subject to technical changes. Please observe the operating instructions.

2)  Manufacturer's max. permissible tightening torque.

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Phone +39 02 4070 7894
commerciale[at]spieth.it

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