Custom Precision Stainless Steel CNC Milled Parts

XCM CNC custom machines stainless steel valve blocks, equipment mounts and non-rotational cavities, providing CNC milling of flats, steps, locating holes and O-ring grooves. Critical faces and hole patterns are controlled to sealing interface and assembly requirements. Grades 304, 316 or 316L can be selected according to the service medium, with passivation or polishing available. Orders start at 1 piece, with typical lead times of 10-15 days depending on part complexity and quantity.

Stainless Steel Sealing Faces and O-Ring Grooves

We machine valve-block sealing faces and O-ring grooves so seals and adjacent interfaces assemble to the drawing. Sealing surface roughness can reach Ra 0.8 um, with a minimum O-ring groove width of 1.0 mm and groove-depth tolerance of 0.01 mm. The machining plan addresses sealing face flatness, groove dimensions and burr requirements together.

Stainless Steel Mounting Faces and Locating Hole Patterns

Stainless steel mounts can include datum faces, locating steps and hole patterns to connect equipment with sensors, valves or other components. Flatness capability is 0.02 mm over a maximum machining area of 1030 x 1030 mm. Hole-pattern position tolerance can reach 0.015 mm, with the machining and inspection plan determined by hole diameter, spacing, count and design datums. Relationships between faces and holes can be checked with a CMM.

Stainless Steel Pockets and Deep-Cavity Tool Access

Flow blocks and cavities can include milled internal spaces, interface steps and connection holes. Long tool overhang in deep cavities and stainless steel work hardening affect cutting, so cavity depth, opening width and internal corner radius must be considered together. Cavity depth-to-width ratios can reach 4:1, or 5:1 with longer tools, subject to chatter and surface-quality evaluation. Minimum end-milled internal radius is R0.5 mm, and internal corners in a 40 mm deep cavity can reach R1.0 mm. These features guide tool selection for access to the cavity and machining of internal contours and mounting features.

Stainless Steel Thin-Wall Housings and Distortion Control

Open cavities, outer walls and assembly faces on thin-wall housings can be milled together. Wall and opening deformation after material removal is a key concern. Metal wall thickness can reach 0.5 mm, with blank pretreatment, aging for stress relief, layered machining and cutting parameter optimization selected according to geometry and workholding. Inspection can focus on wall thickness, opening shape and cover mounting faces to verify assembly requirements for the housing and internal components.

Quality Systems and Equipment for Custom Milling

XCM CNC’s quality systems include ISO 9001, ISO 13485, IATF 16949 and GJB9001C, with equipment from DMG, Mazak, Matsuura and Brother. Valve blocks, mounts and cavities are machined and dimensionally inspected against drawings.

Milling and Secondary Operations Delivered Together

The factory machines parts from small connectors to large structural components. Local shapes or accuracy requirements that milling alone cannot readily achieve can use necessary grinding, EDM or wire EDM. Passivation and polishing can also be coordinated according to the order, allowing you to source parts with machining and surface treatment completed.

Equipment Matched to Feature Accuracy and Cost

We use four equipment tiers from mainland China, Taiwan, Japan, and Europe and North America, matching machines to part and operation accuracy requirements. Locating holes, sealing faces and general outer profiles each use equipment suited to their required accuracy, balancing machining quality and order cost.

Inspection Documents for Sealing Faces and Hole Patterns

CMM reports, FAI first article reports and material certificates can be provided according to the order. Report items correspond to drawing datum faces, locating holes and groove dimensions. Sealing face roughness can be measured separately, giving both dimensional and surface-quality records clearly defined inspection targets.

Prototype Approval before Production

Prototypes typically take 3-7 days, depending on part complexity and project requirements. Samples let you check valve-block interfaces, mounting hole positions and cavity assembly. After approval, production follows the approved drawings and surface requirements.