When replacing cabinet door supports, upgrading medical device lifting arms, or maintaining industrial equipment hatches, precise measurement of existing Gas Struts is crucial. Incorrect dimensions can lead to installation failures, insufficient support, or equipment malfunctions. So, how to measure gas struts to ensure the perfect replacement or upgrade? Master the following key parameters for easy navigation.
Core Measurement Parameters: Lock in the Correct Specifications in Three Steps
Measurements focus on three physical dimensions—record accurately before disassembly:
Stroke Length
Definition: The distance change between two mounting center points when the piston rod extends fully and compresses fully; i.e., the maximum active length of the piston rod.
How to Measure: Compress the gas strut completely (shortest state) and measure the distance (A) between centers. Extend it fully (longest state) and measure again (B). Stroke Length = B - A.
Key Point: A core dimension; errors will prevent the strut from reaching the required opening angle or closing position.
Extended Length
Definition: The distance between mounting center points when the piston rod is fully extended (i.e., measurement B above).
How to Measure: Directly measure the straight-line distance between centers (ball socket or eyelet centers) in the fully extended state.
Key Point: Ensures the strut extends fully without jamming due to excess length or failing to reach due to shortness.
Compressed Length
Definition: The distance between mounting center points when the piston rod is fully compressed (i.e., measurement A above).
How to Measure: Directly measure the straight-line distance between centers in the fully compressed state.
Key Point: Prevents the strut from blocking equipment closure or occupying excessive space when retracted.
Important Tip: Use a precise tape measure or caliper. Record units in millimeters (mm) or inches (in)—mm is more common. Measure from the center of mounting fittings (ball socket or eyelet center).
Critical Details Not to Overlook: Mounting Methods and Force Ratings
Beyond the three core lengths, the following directly impact installation and functionality:
End Fittings Types
Common Types: Ball Socket, Eyelet, and Threaded End are typical. Combinations (e.g., ball socket on one end, eyelet on the other) also occur.
How to Confirm: Observe connector shapes; taking photos is recommended.
Key Point: Must match the equipment’s mounting base type, including ball/eyelet diameter and hole size.
Fitting Dimensions
Ball Diameter: Measure the widest part of the ball socket.
Eyelet Inner Diameter / Eyelet Width: Measure the inner diameter of the eyelet hole and the width (thickness) between its metal pieces.
Thread Size: For threaded ends, measure diameter and pitch (e.g., M8x1.25).
Key Point: Ensure new strut fittings fully match existing mounts.
Force Rating
Definition: The thrust during extension or resistance during compression (in Newtons [N] or pounds [lb]), determining whether the strut can support equipment weight smoothly.
How to Determine:
Method 1 (Best): Check labels or laser engravings on the cylinder (e.g., 450N, 100lb).
Method 2: If labels are unclear, estimate based on the supported object’s weight, mounting position (lever arm effect), or consult a professional supplier. Avoid guesswork—excessive force may damage equipment, while insufficient force fails to support or hold the open state.
Key Point: Incorrect force ratings are a common cause of poor post-replacement performance. For applications requiring mid-stroke locking, choose Lockable Gas Struts and specify holding force at the locking position.
Special Type: Measurement Focus for Lockable Gas Struts
For Lockable Gas Struts, besides general measurements, note:
Locking Position: Specify where (fully extended, compressed, or mid-stroke) locking is needed.
Release Mechanism: Common types include cable release, button release, or rotary release—choose based on operability and space.
Post-Measurement Actions: Ensure Foolproof Results
Clear Documentation: List all data (stroke, extended/compressed lengths, fitting types/sizes, force rating (if available), locking needs).
Photographic Evidence: Take multi-angle photos of the strut, ends, and cylinder labels (if any) for supplier verification.
Application Check: Reconfirm equipment type, weight, and working environment (temperature, corrosion risks) to help suppliers validate specifications.
Precision Measurement, Effortless Replacement: Choose a Professional Partner
Mastering how to measure gas struts is the first step to project success. Accurate dimensions and specifications (core lengths, fitting details, and critical Force Rating) form the basis for selecting the ideal strut. Whether standard or lockable types, a successful measurement avoids subsequent hassles.
Choosing an experienced Gas Strut Supplier matters. Professionals can quickly match standards using your measurements and offer customized solutions for complex applications. COLEWELL, dedicated to excellence and precision in gas strut applications, is your trusted partner.
