Inside the Cylinder - Pin Chambers, Keyway, and Plug-to-Shell Fit
A reliable pin-tumbler cylinder requires precise control of internal geometry. KEY-CNC provides customized solutions for different lock designs, key systems, and performance requirements.
Pin chambers: Precisely machined to ensure proper pin alignment and smooth movement, reducing sticking and improving consistency during operation.
Keyway profile: Manufactured through precision broaching to maintain accurate geometry, enabling smooth key insertion and reliable pin engagement.
Plug-to-shell fit: Carefully controlled through precision machining and matching processes to achieve smooth rotation, stable performance, and customized assembly requirements.
Brass Lock Body Manufacturing Process
A brass cylinder lock body requires specialized machining processes focused on precision turning, cross-drilling, and keyway forming rather than standard fastener production.
step1: CNC Turning
C3604 brass bar stock is machined on CNC lathes to form the shell diameter, plug diameter, and overall dimensions, achieving a smooth surface finish and consistent geometry.
step2: Cross-Drilling Pin Chambers
The shell is precisely positioned for pin chamber drilling, with each hole location controlled to match the required key system. Additional operations such as tapping are available for customized mounting or attachment features.
step3: Keyway Broaching
The plug is precision broached to create the required keyway profile in a single process. For special key designs, alternative machining methods can be used to produce customized profiles.
4. Deburring and Finishing
Machined edges and keyway openings are carefully finished to remove burrs and ensure smooth key insertion. Surface treatments, including satin or polished finishes, can be customized.
5. Assembly and Testing
For complete cylinder assemblies, KEY-CNC provides hardware insertion, component fitting, and functional testing to ensure smooth rotation and reliable performance before shipment.
Custom Brass Cylinder Lock Body Specifications
| Parameter | Capability |
|---|---|
| Material | Brass C3604, C2600, and other copper alloys |
| Design | Custom cylinder bodies, plugs, shells, and locking structures |
| Dimensions | Made to customer drawings, samples, or specifications |
| Keyway & Pin System | Custom profiles, pin layouts, and security configurations |
| Machining | CNC turning, drilling, broaching, deburring, and finishing |
| Surface Finish | Natural brass, polishing, satin, plating, and custom finishes |
| Assembly | Component fitting, functional testing, and OEM production |
Frequently Asked Questions
Can you manufacture brass cylinder lock bodies based on our drawings or samples?
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Yes. KEY-CNC supports OEM production based on customer drawings, samples, or specific design requirements, including customized dimensions, keyway structures, and assembly features.
What brass materials are available for cylinder lock bodies?
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We commonly work with brass materials such as C3604 and C2600. Other copper alloys can also be considered according to mechanical, machining, or application requirements.
Can you produce small batches for prototype testing?
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Yes. KEY-CNC supports prototype development and low-volume production, allowing customers to evaluate fit, function, and design performance through their own testing process before mass production.
What quality checks are performed during production?
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Each production stage is controlled through dimensional inspection, machining verification, and functional checks to ensure consistent assembly and reliable operation.
What information is needed for a quotation?
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Please provide drawings, 3D files, samples, material requirements, quantity, and any special finishing or assembly requirements. Our team can then recommend the most suitable manufacturing process and solution.
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