Precision Flat Parts

Core Advantages

Low-Profile Assembly Space
Thin-plate options from 1–8 mm suit assemblies with a restricted height allowance. Where a backing member sits beneath an instrument or fixture, the thin section occupies less of the available stack height than a conventional thick base plate.
Uniform Opposing Faces
Machining the two working faces establishes the parallel seating relationship specified on the drawing. When a component is sandwiched between adjoining members, controlled face geometry limits wedge-shaped variation across the joint instead of relying on the original stock surfaces.
Smooth Contact Faces
Surface roughness from Ra 0.8–3.2 µm is available for the specified working faces. At broad mating contacts, the finer machined texture reduces the prominence of tool marks against the adjoining surface, giving fixture and backing members a defined surface finish at their seating interfaces.

Specification Parameters

Parameter Item	Standard Specification Range
Plate Thickness	1mm–8mm ultra-thin precision models, 10mm–120mm conventional models
Surface Parallelism	≤±0.02mm
Applicable Materials	6061 aluminum alloy, 304 stainless steel, cold-rolled steel sheet
Surface Roughness	Ra0.8–Ra3.2 precision polishing optional
Supporting Procedures	Precision surface milling, micro-hole drilling, countersinking and integrated chamfering

Customization Capabilities

Flat parts are produced from the approved drawing or sample, with stock preparation followed by staged roughing and finishing. The machining sequence is arranged around the specified working faces, and small holes or edge features are completed without changing the agreed datum scheme.

Customizable Items

Material: 6061 aluminum, 304 stainless steel or cold-rolled steel

Overall length, width and perimeter shape

Conventional plate thickness: 10–120 mm

Mounting-hole diameters and center distances

Countersink size and angle

Chamfer width and edge profile

Drawing-defined face and edge tolerances

Quality Control

Stock grade, hardness, size and surface condition are checked before machining. The first piece establishes the inspection reference for the plate, including the drawing's datum face and the features used to locate the workpiece during measurement.
CMM inspection checks hole locations and the relationships between faces. In-process measurements look for changes following material removal or reclamping, and roughness measurements are taken on the designated contact surfaces rather than inferred from appearance.
Finished plates receive a full appearance and key-dimension check before packing, with particular attention to nicks and raised edges on seating areas. Inspection records identify the part revision and production lot; third-party inspection is accepted.