erick@spiewakgroup.com
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Retrofitting a lever Door Handle means replacing an existing knob or lever with a newer lever system while using the same door preparation. Most modern locksets—including those similar in structure to Kwikset models—follow standard backset, bore diameter, and latch sizing. This makes retrofitting straightforward when the new hardware matches those dimensions.
Wingstec manufactures lever handles, latch bodies, and rosettes designed to fit standard door preparations, making them suitable for retrofit projects in residential and commercial settings.
Before beginning the retrofit process, verify a few key measurements.
Backset (typically 60 mm or 70 mm)
Bore hole diameter (usually 54 mm)
Latch faceplate size
Door thickness (commonly 35–45 mm)
Wingstec lever handles are designed to follow international hardware standards, ensuring compatibility with most existing installations.
Most lever sets include two screws beneath the decorative rosette.
Hold both sides to prevent sudden separation.
Unscrew the faceplate on the door edge and pull out the latch.
This exposes the mounting holes and prepares the door for the new hardware.
Remove debris, old screw fragments, worn wood fibers, or misaligned holes.
The angled side of the latch must face the strike plate when installed.
Wingstec latch bodies are engineered with a clear directional orientation for smooth operation and easy alignment.
Insert the latch into the door edge.
Ensure the bolt extends and retracts properly.
Secure the latch with screws using firm but not excessive torque.
Proper latch seating ensures correct lever action once fully installed.
Insert the spindle through the latch mechanism.
Align the screw posts with the mounting holes.
Ensure the lever feels secure but do not overtighten.
This hides the mounting screws and completes the appearance.
Wingstec’s levers often use reinforced internal structures to prevent wobbling after retrofit installation.
After installation, check performance.
The lever moves smoothly without resistance.
The latch retracts fully when the lever is pressed.
The latch extends completely when released.
The strike plate aligns properly with the latch bolt.
Smooth mechanical action indicates correct installation.
If the latch does not fully engage:
Loosen the strike plate screws and reposition slightly.
Tighten screws again to secure the new alignment.
This ensures reliable door closure and long-term hardware stability.
Door holes are misaligned from previous hardware.
The old knob used a non-standard latch size.
The door material is worn or damaged.
Solutions include filler plates, reinforcement brackets, or replacing the latch with a compatible Wingstec model.
Designed to match common door prep dimensions.
Reinforced spindles, durable springs, and stable mounting systems.
Suitable for residential, commercial, office, and hospitality environments.
Precision engineering ensures the lever maintains stability after installation.
Retrofitting a lever door handle involves removing the existing hardware, preparing the door, installing the new latch, fitting the new levers, and testing for smooth operation.
With hardware engineered for compatibility and durability—such as lever systems produced by Wingstec—the retrofit process becomes efficient, secure, and suitable for both upgrade projects and new design specifications.
