Ratchet-LockWasher
Ratchet-LockWasher: A reusable fastener accessory used to mechanically prevent unintentional loosening of standard nuts and bolts.
Features
Mechanically Locked
Fasteners are positively engaged and mechanically locked until intentionally released.
Reduced Bolt/Nut Head Friction
Efficient torque-to-bolt tension conversion. A hardened face slip plane reduces bearing friction.
High friction lock systems induce bolt bearing/ head stress.
Audible & Tactile Tightening
Provides accurate preload control and tactile feedback with ratchet lock increments at 10 degrees.
Quick Release
The load & locking function are isolated from each other so the independent locking mechanism is quickly released with intentional action.
Force Indicator
The LAS+ system can incorporate a visual indicator for clamp force-tension verification and condition monitoring.
Works with Standard Hex Fasteners and Tooling
Reversible & Reusable
Product Options
Ratchet-LockWasher (RLW) are sized according to bolt diameter and hex across flats dimension.
Bolt Sizes in Metric M12-M100 and Imperial 0.5”-4”.
The Active System includes Bellville disc springs in a protective cartridge. Larger sizes can include a Force Indicator.
- Ratchet-LockWasher Standard (RLW+)
- LockDown Active System (LAS+)
- LockDown Active Clamp (LAC+)
- LockDown Active System + Force Indicator (LAS+Fi)
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Concept
A key advantage of the design is that the load and locking functions on the Ratchet-Lock Washer are isolated from each other. The bolt tensile force is transmitted directly through the washer body, whereas the locking function, which includes the ratchet teeth with the spring, operates independently.
- Designed to remain safely locked when bolt pretension is lost
- Designed for controlled load applications & quick release
- Designed to reduce bolt stress & fatigue
- Designed for low head friction & smooth load application
PATENT PENDING- PRELIMINARY APPROVAL GRANTED
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About Us
At LockDown Industries, we design and engineer solutions that improve reliability, safety, and performance across demanding mechanical applications.
As mechanical engineers, we were confronted with persistent failures in existing bolted joint designs, a challenge that led to the creation of our Ratchet-Lock Washer (RLW). This patent-protected, reusable washer employs a positive mechanical ratchet mechanism to prevent rotation under extreme vibration and shock, providing a fail-safe, maintenance-reducing solution.
Built on sound engineering principles and proven through real-world testing, our innovations support industries that demand absolute security and performance, from rail and mining to energy, construction, and heavy machinery.
Built on sound engineering principles and proven through real-world testing, our innovations support industries that demand absolute security and performance, from rail and mining to energy, construction, and heavy machinery.
Videos...
LockDown_Ind Low-Friction Ratchet-LockWasher
...this is where the Ratchet-LockWasher bridges the gap—offering a simple, robust, and highly effective solution for preloading and preload retention.
LockDown_Ind M36X55AF
🔩 See It. Hear It. Trust It. 🔩Fastener security is critical in high-vibration, high-load environments—where failure is not an option. That’s why we’re showcasing the M36 Ratchet-LockWasher in action—
LockDown_Ind Movie 1
The Ratchet-LockWasher is reversible and reusable, and will not damage the thread as the load and the locking function are isolated from each other.
LockDown_Ind Live-Load System
Ratchet-LockWasher demo. Part 1- Standard. Part 2- with Bellville Disc Spring, aka LockDown Active System. (M12 is too small to include a Force Indicator).
Sectors
Heavy-Duty Fastening SolutionsEngineered for demanding environments, our heavy-duty fasteners deliver exceptional vibration resistance, precise preload control, and long-term reliability. Designed to reduce maintenance downtime and improve joint integrity.
Key Industries Served:Rail & Transport, Power Generation, Oil & Gas, Mining, Petrochemical, Construction, Subsea, Infrastructure, Steel Manufacturing, Automotive, Aerospace, Shipbuilding, Chemical Processing, Cement, Defence, Metallurgical, Pulp & Paper, Heavy Equipment Manufacturing, Forestry, Earthmoving, Agricultural, Material Handling and Crane & Excavator Maintenance & Production.
Key Industries Served:Rail & Transport, Power Generation, Oil & Gas, Mining, Petrochemical, Construction, Subsea, Infrastructure, Steel Manufacturing, Automotive, Aerospace, Shipbuilding, Chemical Processing, Cement, Defence, Metallurgical, Pulp & Paper, Heavy Equipment Manufacturing, Forestry, Earthmoving, Agricultural, Material Handling and Crane & Excavator Maintenance & Production.
Avoid Disaster
While preload and slip resistance are fundamental in friction-based designs, self-loosening remains a separate failure mode that can still compromise joint integrity. The Ratchet-LockWasher (RLW) directly addresses this issue, providing a fail-safe mechanism against rotational loosening while also enhancing preload control and long-term joint stability. Its ability to function independently of minimum tension requirements makes it a robust alternative to conventional locking washers, especially in dynamic, safety-critical environments where preload cannot always be guaranteed.
