Linear Guideway Stopper Block

Linear Guideway Stopper Block

Product Description

The Linear Guideway Stopper Block is a safety and alignment accessory engineered to protect linear motion assemblies from travel overruns, system errors, and physical damage. This component integrates securely with standard profile linear rails, serving as a robust physical limit at the ends of travel axes.

Fail-Safe Overtravel Protection
Acting as a highly reliable overtravel stop and derailment protection device, this block is designed to absorb impact energy during system faults. It is an essential fail-safe in CNC machining, automated packaging lines, and high-speed Cartesian coordinate gantries where carriage runoff must be prevented.

Rigid Mechanical Barrier
The heavy-duty mechanical end stop attaches securely to the rail, creating a rigid physical barrier to protect carriages from overrunning and losing internal ball bearings. Equipped with an integrated polyurethane or rubber buffer, it absorbs kinetic impact and minimizes mechanical shock.

Compatibility
Fully compatible with standard profile rail sizes, including the HG15, HG20, HG25, and HG30 series, as well as the EG15, EG20, EG25, and EG30 series.

Operating Principles of Linear Guideway Stopper Blocks
1. Derailment and Ball Scatter Prevention
Profiled linear guides (such as the HG or EG series) rely on internal circuits of recirculating steel balls to facilitate smooth linear motion. If a carriage block is driven past the physical end of the guide rail, structural support is lost, and the internal steel balls can easily escape and scatter from their tracks. Reassembling a scattered bearing block is highly challenging, often rendering the unit unusable without complete bearing replacement. A securely mounted stopper block creates a robust physical barrier that halts the carriage before it can leave the guide rail.
 

2. Fail-Safe Mechanical Hard Stop
While electronic limit switches detect positioning errors, they cannot physically stop a moving load during a hardware failure. If a motor driver faults, a power surge occurs, or a control loop loses positional feedback, the carriage may continue to drive forward. The stopper block acts as a rugged mechanical limit, halting the carriage upon contact and helping prevent the assembly from impacting delicate tooling, sensor arrays, or the machine frame.

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