MB 21 Lock Washer 105 mm - Steel Bearing Locking Washer DIN 5406
50 pcs.
€0.77
(net)
Price for: 1pcs.
The MB 21 Lock Washer 105 mm DIN 5406 is a reliable, high-durability securing component for industrial bearing assemblies, ensuring stable positioning of lock nuts and preventing loosening under dynamic loads. An essential element for maintenance engineers seeking long-term performance and minimal downtime.
📍 Warehouse & Store: Lublin, ul. Smoluchowskiego 1, building 4
🚚 24h Delivery - fast order processing for domestic and international shipments
Industrial Applications and Functional Purpose
The MB 21 lock washer (105 mm) is a precision-engineered securing component designed to prevent loosening and rotation of bearing lock nuts in demanding industrial and mechanical systems. Frequently searched phrases in English markets include: “MB21 lock washer 105mm”, “DIN 5406 bearing lock washer”, “MB lock washer for KM nuts”, “bearing locking washer”, “KM nut lock washer”.
This washer is widely used in bearing assemblies, drive shafts, transmission systems, bearing housings, and machinery supports, where secure fixation is essential to maintain alignment, reduce vibration, and ensure operational reliability in heavy-duty industrial environments.
Key Advantages and Technical Features
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DIN 5406 standard - fully compatible with KM-type bearing lock nuts
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Inside diameter: 105 mm - engineered for precise fit and secure positioning
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Material: high-strength steel - excellent resistance to mechanical stress and deformation
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Locking tab design - prevents nut rotation, increases safety in rotating systems
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Fast and simple installation - reduces maintenance time and machine downtime
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Ideal for industrial machinery, agricultural equipment, production lines, gearboxes, conveyors, and bearing housing units
Technical Data
| Parameter | Specification |
|---|---|
| Model | MB 21 |
| Standard | DIN 5406 |
| Inner Diameter | 105 mm |
| Outer Diameter | approx. 145 mm |
| Material | Steel (available in anti-corrosion coated versions depending on supply) |
| Compatibility | KM lock nuts and bearing housings |
FAQ - Common Search Questions
Q1: What is the purpose of an MB lock washer?
It locks the KM nut securely in place, preventing loosening due to vibration or rotational forces in bearing assemblies.
Q2: How do I choose the correct MB washer size?
Match the washer’s inner diameter to the corresponding KM nut size and verify system dimensions based on DIN 5406 specifications.
Q3: Can the MB 21 washer be used in heavy industrial applications?
Yes - steel construction ensures durability under high load, temperature variation, and continuous operation.
Q4: Where is the MB 21 washer commonly used?
In bearing housings, shaft units, gearboxes, transmission drives, and agricultural or industrial machinery.
The MB 21 Lock Washer 105 mm DIN 5406 is a reliable, high-durability securing component for industrial bearing assemblies, ensuring stable positioning of lock nuts and preventing loosening under dynamic loads. An essential element for maintenance engineers seeking long-term performance and minimal downtime.
📍 Warehouse & Store: Lublin, ul. Smoluchowskiego 1, building 4
🚚 24h Delivery - fast order processing for domestic and international shipments