10:20 Allen Wang | CEO and Founder, HIPAD
Updated: September 23, 2026
A crescent window lock secures a sliding window by rotating a cam into a keeper at the meeting rail. Correct selection depends on profile offset, mounting centers, keeper position, handing and installed engagement, not appearance alone.
Close the sash and measure the relative height and lateral offset between the two meeting rails. Include weather seals, pile strips and production tolerances. The lock body must sit flat while the cam reaches the keeper without pulling the panels out of alignment.
| Dimension | What to record | Why it matters |
|---|---|---|
| Rail offset | Height difference between mounting surfaces | Controls lock-to-keeper alignment |
| Mounting centers | Center-to-center screw spacing | Determines new or replacement fit |
| Edge distance | Screw center to profile edge | Affects support and clearance |
| Keeper position | Height, setback and engagement line | Controls cam capture |
| Profile wall | Material thickness at each fixing | Guides fastener selection |
State the viewing side, moving sash, lock location and required rotation. Left and right labels can vary between suppliers, so use a drawing or photograph marked with the opening direction. Confirm that the lever or thumb turn remains reachable after installation.
Position the keeper so the cam enters without impact and reaches full engagement. Too little engagement can allow release under movement; excessive preload can increase operating force, distort the sash or accelerate wear. Compared with generic replacement listings, an OEM approval must control both lock and keeper geometry.
Check screw length, head clearance, pilot holes and internal profile support. Replacement holes may be enlarged or off-center. Matching mounting centers will not solve a damaged fixing surface or a keeper positioned for a different cam path.
The source library identifies crescent locks for sliding windows within HIPAD’s Window Locks with Key family. It does not publish a universal dimensional range, certificate number, price or MOQ for every crescent-lock model. Request model drawings, material and finish details, then test a representative sample.
No. Rail offset, screw centers, cam path, keeper geometry and handing must match the window system.
No. Also check profile support, faceplate coverage, cam engagement, keeper position and operating clearance.
Use the model drawing and installed sample. The supplied family reference does not state one universal engagement dimension for every lock.
HIPAD describes OEM/ODM support for dimensions, structures, finishes, logos, molds and packaging. Feasibility, price, MOQ and lead time require a project quotation.
Send the window profile, meeting-rail offset, screw centers, keeper position, handing, finish, quantity, packaging and test requirements. Review Window Locks with Key, el lock systems range, el window lock OEM guide, el sliding window handle guide y contact HIPAD for model-specific confirmation.
Allen Wang is CEO and Founder of HIPAD. He began as a technical engineer in 1998 and focuses on manufacturing, tooling, quality, OEM/ODM development and architectural hardware supply.
Responderemos en un plazo de 24 horas. Para solicitudes urgentes, contáctenos por WhatsApp/WeChat al +86 137 9191 8989 o llame directamente al mismo número.
*Respetamos la confidencialidad de sus datos y protegemos toda la información.
Solo utilizaremos sus datos para responder a su solicitud y nunca enviaremos correos no solicitados ni mensajes promocionales.
