Which lock nuts is this socket compatible with?

It is designed for size 4 lock nuts, such as SKF KM 4, KMK 4, and KMFE 4.

What drive connection does this socket use?

It features a 1/2" female square drive suitable for torque wrenches and ratchets.

What are the dimensions of the SKF TMFS 4 socket?

It has an outer diameter of 38 mm, an overall height of 82 mm, and an effective height of 58 mm.

Can you use this socket in confined spaces?

Yes, this axial socket requires less space around the bearing arrangement than standard hook spanners.

Is this socket magnetic or non-sparking?

No, this socket is not magnetic, not non-sparking, and not VDE certified.

SKF TMFS 4 axial lock nut socket 3/8" with effective height 58mm outside diameters 32-38mm

Supplier number: SKF TMFS 4 | EAN 7316571101576

112.40 tax incl.

€92.89 excl. VAT (incl. all environmental contributions)

On order: delivered from 23/10/2026

Ordered before 20:00 - delivered as of 23/10/2026
Shipping costs €6.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Delivered from Belgium

↓ Documents (1) ✆ Talk to a specialist

Precise installation of radial bearings

Practical benefits

Access in confined spaces: You reach lock nuts easily in compact arrangements where standard hook spanners require too much surrounding radial space.
Controlled tightening with torque: With the 1/2" square drive, you connect torque wrenches or power tools to tighten lock nuts with exact force.
Long-lasting corrosion protection: The Skf TMFS 4 socket features a durable protective coating that shields the hardened steel tool from wear.

In a nutshell

The right choise for

With the Skf tmfs 4 axial lock nut socket, you mount and dismount rolling bearings with complete precision. Where traditional hook spanners lack radial clearance around the bearing arrangement, this compact socket reaches recessed lock nuts in tight spaces or deep housings. The 1/2" female square drive lets you connect a torque wrench or power tool to tighten size 4 KM, KMK, and kmf lock nuts to exact torque specifications. This prevents damage to shafts and nuts while ensuring safe installation. Its protective coating delivers long-lasting corrosion and wear resistance for demanding industrial maintenance.

Product information FAQ

€112.40

tax incl.

Key features according to our expert

Socket size: 32 mm
Connection size: 1/2"
Connection profile: Internal square
Length: 82 mm
VDE approved: No
With safety colour code 1000V: Not applicable
Non-sparking: No
Magnetic: No

Product description

The TMFS axial lock nut sockets are used to mount bearings on tapered journals or adapter sleeves and for dismounting bearings on withdrawal sleeves. Available in 21 different sizes, they are suitable for various locknuts sizes 0 to 20.

Good alternative to hook spanners, making the use of power tools or torque wrenches possible
Allow the use of torque wrenches
The sockets are provided with a zinc flake coating to assure corrosion protection

Documents

⤓ Technical data sheet PDF

All Features

Socket size: 32 mm
Connection size: 1/2"
Connection profile: Internal square
Length: 82 mm
Vde approved: No
With safety colour code 1000v: Not applicable
Non-sparking: No
Magnetic: No
Material: Alloy engineering steel, hardened and tempered
Fits on lock nuts inside skf split pillow block housings (snl): No
Drive connection: 1/2"
Effective height: 58
Allows bearing mounting: Yes, angle method or with clearance reduction measurement
Coating: Black oxide
Height: 82
Color code: Metallic Black
Outer diameter: 38
Outer diameter lock nut: 32

Brand SKF
01900344
EAN 7316571101576
Supplier number SKF TMFS 4

Frequently asked questions about this product

Answered by specialists

Which lock nuts is this socket compatible with?: It is designed for size 4 lock nuts, such as SKF KM 4, KMK 4, and KMFE 4.
What drive connection does this socket use?: It features a 1/2" female square drive suitable for torque wrenches and ratchets.
What are the dimensions of the SKF TMFS 4 socket?: It has an outer diameter of 38 mm, an overall height of 82 mm, and an effective height of 58 mm.
Can you use this socket in confined spaces?: Yes, this axial socket requires less space around the bearing arrangement than standard hook spanners.
Is this socket magnetic or non-sparking?: No, this socket is not magnetic, not non-sparking, and not VDE certified.