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Precision Locknut heavy MSW

Product catalog summary

Overview: The SPIETH Locknuts Series MSW is engineered for mounting roller bearings, ensuring high performance and quality in bearing assemblies. These locknuts are characterized by their high axial rigidity, load capacity, and locking properties, making them ideal for high-stress applications.

Specifications: The locknuts are rotationally symmetric, avoiding imbalances like grooves or slots. Constructed from tempered and burnished steel, they feature a fine metric ISO thread. The series is categorized into two sizes: up to MSW 70.46 and from MSW 72.60, each with distinct pretension methods.

Functional Principle: The locknut's contact surface can be precisely adjusted at any axial position, ensuring high run-out accuracy. This design eliminates thread flank play, centering the locknut and aligning it perpendicularly to the spindle axis.

Applications: These locknuts are suitable for pretensioned roller bearings with high load capacity, such as axial cylindrical roller bearings, and other high-stress nut connections like press frames, hydraulic cylinders, and testing machines.

Mounting Instructions: For sizes up to MSW 70.46, the locknut is mounted using its pretension moment. For sizes from MSW 72.60, set screws are used for pretension. The process involves cleaning, oil application, and tightening screws in a specific sequence for proper alignment and tension.

Dismantling Instructions: Dismantling involves releasing screws in a specific sequence to prevent jamming. The locknut should only be reused on the same spindle to avoid adjustment issues.

Technical Benefits: The locknuts provide even clamping forces, high axial rigidity, and compensate for surface imperfections, ensuring trouble-free operation. They are designed to withstand high dynamic stress and maintain precision under load.

Additional Information: Special versions and additional mounting instructions are available upon request. Detailed tables with dimensions, tightening torques, and load capacities for various locknut sizes are included.

Assembly Examples:

Fig. 11: Demonstrates the use of a needle axial cylindrical bearing with high load capacity and axial rigidity, effectively transmitted through a mounted locknut.
Fig. 12: Shows a machine frame designed for high stress, where the locknut ensures even stress distribution, preventing bending moments.
Fig. 13: For larger dimensions (from MSW 72.60), axial pretension is applied using integrated set screws due to insufficient pretension moment.
Fig. 14: Illustrates a piston fixture utilizing the locknut's load capacity, axial rigidity, and locking properties.

Disclaimer: Reproduction of this publication is prohibited without prior permission. While specifications and information are carefully compiled, liability for errors or omissions is not accepted.

Contact Information: SPIETH-MASCHINENELEMENTE GmbH & Co KG, Alleenstrasse 41, D-73730 Esslingen, Phone: +49 (0)711 930730-0, Fax: +49 (0)711 930730-7, Website: www.spieth-maschinenelemente.de, Email: [email protected]

Catalog excerpts

Series MSW Works Standard SN 04.03 >

Open the catalog to page 1

SPIETH locknut series MSWExecution up to MSW 70.46SPIETH locknut series MSWExecution from MSW 72.60 > MSW series locknuts are precisionnuts capable of absorbing extremely high axial forces. As a result, they are ideally used in applications involving pretensioned roller bearings with high load capacity, such as axial cylindri- cal roller bearings. However, they can also be used to create other nut con- nections subjected to high levels ofThe locknut is designed rotationallysymmetric without any imbalancing properties such as grooves, slots etc. The clamping screws distributed evenly around the...

Open the catalog to page 3

As the effective friction coefficients depend on a range of factors which are often beyond the control of the manufacturer, values specified here are without commitment and are made in the form of recommenda- tions. M M > A : Tightening torque per clampingscrew. The tightening torque is based on a friction coefficient of = 0.14. The axial pretension of a screw con-nection often plays a decisive role for successful function, and must there- fore be set with particular accuracy. However, in most assembly works- hops, direct measurement of this vari- able is not possible, raising the need for indirect...

Open the catalog to page 5

Dismantling First relieve the tension of the clam- ping screws slightly in diagonal sequence. Only then should the clamping screws be completely rele- ased. This prevents the total tension of the diaphragm from working on the last clamping screw to be relea- sed and causing a jamming effect.Once a locknut has been secured on a spindle thread, after removal it may only be used again on the same spindle. Adjustment processes carried out between the spindle and locknut can otherwise lead to problems when using on a different spindle. A set of mounting instructions is provided with every delivery...

Open the catalog to page 8

Dismantling 1. Open the lock screws. First release the set screws lightly in the indicated sequence, then release completely. 2. Release the clamping screws indiagonal sequence slightly before completely releasing. This prevents the total tension of the diaphragm from working on the last clamping screw to be released and causing a jamming effect.Once a locknut has been secured on a spindle thread, after removal it may only be used again on the samespindle. Adjustment processes carried out between the spindle and locknut can otherwise lead to problems when using on a different spindle. A set of...

Open the catalog to page 9

Fig. 11:The high load capacity and axial rigidity of the needle axial cylindrical bearing is reliably transmitted to the feed drive system via the mounted locknut. The excellent locking pro- perties provided by the locknut are of major importance under dynamic stress. Fig. 12:Machine frame subjected to high levels of stress. The precise right-angled contact surface of the locknut guarantees that stress is exerted evenly on the bolt thread. There are no bending moments occurring. This is a particu- lar advantage in applications invol- ving dynamic stress. 10 >

Open the catalog to page 10

Fig. 13: In the upper dimension range (from MSW 72.60), the required degree of axial pretension cannot be applied using the locknuts own pretension moment due to the size of the friction radii. Here, axial pretension is applied by integrated set screws. Fig. 14: Piston fixture with locknut. This appli- cation utilizes all the technical benefits of locknuts: Load capacity, axial rigidity and excellent locking properties. 11 >

Open the catalog to page 11

Precision Locknut heavy MSW

Precision Locknut heavy MSW

Catalog excerpts

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