SKF HM56T

SKF HM 56 T Bearing Lock Nut

Description

The SKF HM 56 T is a high-precision lock nut designed for securing CARB toroidal roller bearings and other components onto a shaft. Manufactured by SKF, a global leader in bearing technology, this lock nut provides a reliable and simple method for bearing mounting. It features four equally spaced slots on its outside circumference for use with a hook or impact spanner, ensuring proper and secure tightening.

Specifications

• Manufacturer: SKF
• Model: HM 56 T
• Product Type: Bearing Lock Nut
• Thread Size: Tr 280×4
• Outside Diameter: 325 mm
• Width: 29 mm
• Material: Steel

Label Info

• Brand: SKF
• Part Number: HM 56 T
• EAN: 7316570489953

Application

This lock nut is primarily used in heavy industrial applications to axially locate bearings on shafts. Common applications include gearboxes, paper processing machines, and large rotating equipment where secure bearing positioning is critical for operational reliability.

Country of Origin

Made in Sweden.

CO2 Impact

By purchasing this pre-owned item, you contribute to a circular economy and help avoid 10.6 kg of CO2 emissions associated with the production of a new unit.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

Question?
What is the correct tightening procedure for the HM 56 T lock nut?

Answer

The HM 56 T should be tightened using a designated hook or impact spanner that fits the slots on its periphery. Tighten to the torque specified in the machinery’s maintenance manual or SKF’s guidelines to achieve the correct bearing preload and secure locking.

Question?
What is the significance of the ‘Tr 280×4’ thread designation?

Answer

This indicates a metric trapezoidal thread. ‘Tr’ stands for trapezoidal, ‘280’ is the nominal diameter in millimeters, and ‘4’ is the pitch in millimeters. This type of thread is robust and ideal for positioning and locking applications.

Question?
Can this lock nut be reused after disassembly?

Answer

Yes, provided the threads and locking faces are in good condition and free from damage or significant wear. Always inspect the nut carefully before reuse to ensure it can still provide the required clamping force and security.

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Last Update: Friday, March 13, 2026