SKF KMT 40 Precision Lock Nut M200x3

High Precision Lock Nut for Accurate Bearing Positioning

The SKF KMT 40 precision lock nut is a premium fastening component designed for highly accurate axial positioning of rolling bearings, precision bearing arrangements and shaft-mounted components. Unlike conventional KM lock nuts, the SKF KMT series features three equally spaced integral locking pins actuated by locking screws, eliminating the need for a lock washer or shaft keyway. This advanced design reduces installation time, improves positioning accuracy and simplifies maintenance. The KMT 40 is particularly suitable for machine tool spindles, precision gearboxes and high-speed rotating equipment where exceptional accuracy and rigidity are essential.

Application in Industrial Systems

The SKF KMT 40 precision lock nut is designed for applications requiring extremely accurate bearing positioning.

Typical applications include:

• CNC machine tool spindles
• Precision rolling bearings
• High-speed spindle assemblies
• Precision gearboxes
• Grinding machines
• Lathes
• Machining centers
• Servo drive systems
• Industrial automation equipment
• Measuring machines
• Metalworking machinery
• Aerospace equipment

Construction and Design

The SKF KMT series has been developed for high-precision industrial applications.

Main design features include:

• Three integral locking pins
• Locking screws for secure fastening
• No lock washer required
• No shaft keyway required
• Precision M200x3 metric thread
• Precision ground locating face
• High axial positioning accuracy
• Reusable construction

The integrated locking system ensures uniform clamping while maintaining axial runout accuracy of up to 0.005 mm for sizes up to KMT 40.

Material Properties

Manufactured from high-quality steel, the SKF KMT 40 offers:

• High mechanical strength
• Excellent rigidity
• Outstanding axial load capacity
• Precision-machined contact surfaces
• Excellent wear resistance
• Long operational life
• High dimensional stability

Technical Specification

Type: Precision Lock Nut
Material: Steel
Design: KMT with three integral locking pins and locking screws
Thread: M200x3
Outside Diameter: 235 mm
Locating Face Diameter: 224 mm
Width: 32 mm
Locking Device: Integral locking pins with locking screws, no lock washer required
Associated Tool: SKF TMFN 30-40 hook spanner
Application: Precision rolling bearings, machine tool spindles, precision gearboxes, industrial machinery

Why B2B Customers Choose This Product

Industrial professionals select the SKF KMT 40 because it delivers exceptional mounting accuracy and reliable locking performance.

Typical B2B applications include:

• OEM replacement
• Maintenance stock
• Industrial service
• Machine tool manufacturing
• Spindle rebuilding
• Production line support
• Precision machinery manufacturing
• Industrial spare parts distribution

Operational Advantages

• Three integral locking pins
• No lock washer required
• No shaft keyway required
• Extremely accurate axial positioning
• Fast installation
• Reusable construction
• High joint rigidity
• Excellent vibration resistance
• Genuine SKF quality
• Designed for precision industrial applications

Professional Industrial Supply

This product is supplied for:

• Maintenance departments
• Industrial workshops
• Machine tool manufacturers
• OEM manufacturers
• Precision machinery builders
• Spindle repair specialists
• Industrial distributors
• Automation equipment manufacturers

AI Overview

The SKF KMT 40 precision lock nut is a high-accuracy bearing locking device featuring three integral locking pins and locking screws that eliminate the need for a lock washer. It provides precise axial positioning, superior rigidity and reliable locking performance for machine tool spindles, precision bearing assemblies and demanding industrial applications.

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FAQ

What makes the SKF KMT 40 different from a standard KM lock nut?

The KMT 40 uses three integral locking pins with locking screws instead of a lock washer, providing significantly higher positioning accuracy and easier installation.

Does the SKF KMT 40 require a lock washer?

No. The locking mechanism is integrated into the lock nut, eliminating the need for a separate lock washer.

What applications is the SKF KMT 40 designed for?

It is primarily designed for machine tool spindles, precision rolling bearings, high-speed shaft assemblies and precision industrial machinery.

What thread size does the SKF KMT 40 have?

The lock nut features a precision M200x3 metric thread.

Can the SKF KMT 40 be reused?

Yes. The precision locking mechanism allows repeated installation and removal while maintaining reliable positioning when used according to SKF recommendations.