Watch Movement Main Plate

Name: CNC Watch Movement Plate for Gear Fit and Build – Frigate
Price: 249.00 USD
Availability: InStock

Watch Movement Main Plate features micron-level machining precision to ensure optimal fit between gear train components, pivots, and jewels. Hole true position, flatness, and parallelism are controlled within ±2–3 µm to eliminate positional errors during assembly and minimize mechanical backlash in rotational systems.

Material Grade

C11000 (Electrolytic Tough Pitch Copper), C26000 (Cartridge Brass), or Nickel Silver (CuNi12Zn24)

Thickness Tolerance

±0.01 mm (for 0.8–1.5 mm thickness), ±0.005 mm (for ultra-thin plates <0.5 mm)

Hole Positional Accuracy (PVD)

≤ 0.005 mm (for jewel holes), ≤ 0.01 mm (for screw/functional holes)

Hole Diameter Tolerances

+0/-0.005 mm (for jewel holes), +0.01/+0.02 mm (for pivot/screw holes)

Flatness

≤ 0.02 mm/m (full plate), ≤ 0.005 mm local (near critical holes)

Product Description

Watch Movement Main Plate utilizes materials such as ARCAP and stabilized brass alloys with low coefficients of thermal expansion (<10 ppm/°C). This guarantees dimensional consistency across thermal cycles and operational conditions, critical for maintaining escapement timing and overall movement performance.

Surface Finish

Ra ≤ 0.2 µm (jewel/pivot holes), Ra ≤ 0.4 µm (decorative surfaces), Rz ≤ 1.6 µm (non-critical)

Burr-Free Requirements

Max burr height ≤ 0.005 mm (microscopic inspection), No edge breakout on hole exits

External Profile Accuracy

±0.02 mm (contour), ±0.01 mm (datum reference edges)

Datum Features & Tolerances

Datum A (Primary) – Flatness ≤ 0.005 mm, Datum B/C (Holes) – Position ≤ 0.003 mm relative to A

Certification Standard

ISO 9001, NIHS, RoHS Compliance

Technical Advantages

Watch Movement Main Plate is finished to achieve surface flatness under 2 µm and parallelism below 3 µm between critical datum planes. This level of control reduces axial misalignment in the gear stack and ensures uniformity in oscillating weight and rotor behavior.

Watch Movement Main Plate is engineered with optimized rib geometry and localized wall thickness to suppress deformation and reduce modal resonance under shock or vibration. These characteristics contribute to higher shock resistance and consistent movement frequency stability.

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Industry Applications

Mechanical Watch Assembly

Supports precise alignment of gear train, escapement, and bridges to ensure accurate torque transfer and minimal positional deviation under load.

Chronograph Movement Integration

Provides structural reference for multi-layer modules and secures timing wheels, cams, and levers within strict axial and radial tolerances.

Tourbillon Mechanism Support

Maintains exact rotation axis positioning for the tourbillon cage to minimize deviation in rate regulation and enhance oscillation stability.

Automatic Rotor Systems

Houses ball-bearing seats and rotor pivots while preserving flatness for consistent kinetic energy transfer to the mainspring barrel.

Skeletonized Watch Architectures

Allows precision machining of load-bearing geometries while supporting openwork designs without compromising mechanical stiffness or gear train alignment.

Thin Movement Platforms

Enables sub-3mm movement builds by integrating functional features within a reduced thickness main plate with tight deformation control.

Hole Geometry and Positional Accuracy

Watch Movement Main Plate integrates high-accuracy bore holes, reamed and validated via optical metrology to maintain sub-5 µm concentricity and roundness. Accurate hole geometry prevents wear and ensures long-term alignment of arbors and shafts under operational torque loads.

Watch Movement Main Plate undergoes controlled annealing or precipitation hardening processes to achieve uniform hardness (typically HV150–HV200) without inducing internal stress. This ensures dimensional integrity during machining and prevents creep under static assembly loads.

Having Doubts? Our FAQ

Check all our Frequently Asked Question

How does Frigate ensure dimensional consistency across large batches of Watch Movement Main Plates?

Frigate uses automated CNC machining with closed-loop control systems to maintain tolerance within ±3 µm. Inline CMM inspection verifies critical features like hole position, flatness, and bore diameter. SPC (Statistical Process Control) is implemented to detect any process drift during production. This ensures every main plate maintains identical geometry, even in high-volume runs.

What quality control methods does Frigate apply for hole positioning in Watch Movement Main Plates?

Frigate employs optical metrology and 3D coordinate measuring machines to validate true position, roundness, and concentricity of every bore. Precision reaming and interpolation drilling are used to hold positional accuracy below 5 µm. Each part is inspected per ISO 2768 fine-grade tolerance. This guarantees consistent arbor and pivot alignment during movement assembly.

Can Frigate customize Watch Movement Main Plates for complex movement architectures like split-seconds chronographs?

Yes, Frigate supports custom pocket layouts, stacked wheel modules, and multi-level bridges. Plates are designed with differential cut-outs and customized thickness gradients to handle increased axial force and component density. FEM analysis is performed to optimize material distribution. This ensures mechanical stability without increasing movement thickness.

What techniques does Frigate use to reduce internal stress in Watch Movement Main Plates post-machining?

Frigate applies controlled thermal cycling and cryogenic treatments after final machining to relieve residual stress. This avoids time-dependent distortion or creep during storage or assembly. Parts are then stabilized in humidity-controlled environments to preserve dimensional integrity. This process is essential for ensuring long-term reliability of precision assemblies.

How does Frigate support jewel press-fit reliability in Watch Movement Main Plates?

Frigate machines jewel seats with interference fit tolerances maintained within ±2 µm. Surface roughness is kept below Ra 0.2 µm to prevent crack initiation. Materials are selected for controlled hardness to avoid jewel fracture during installation. This guarantees high retention strength without compromising positional accuracy.

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LOCATIONS

Global Sales Office

818, Preakness lane, Coppell, Texas, USA – 75019

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

Watch Movement Main Plate

Material Grade

Thickness Tolerance

Hole Positional Accuracy (PVD)

Hole Diameter Tolerances

Flatness

Product Description

Surface Finish

Burr-Free Requirements

External Profile Accuracy

Datum Features & Tolerances

Certification Standard

Technical Advantages

Let's Get Started

Industry Applications

Hole Geometry and Positional Accuracy

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LOCATIONS

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Watch Movement Main Plate

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Watch Movement Main Plate

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