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MetalKeen manufactures precision CNC machined components for packaging machinery, with a focus on dimensional accuracy that directly affects equipment performance. Operating under ISO 9001:2015 certification, we machine filling nozzles, sealing rollers, guide rails, star wheels, and conveyor drive components in stainless steel 304/316L, aluminum 6061/7075, PEEK, POM, and tool steel. Turned features are routinely held to ±0.005mm; milled features to ±0.01mm. Every production order ships with CMM inspection reports and full material traceability. Whether you are replacing a worn sealing roller or sourcing a complete set of filling system components, we work from your drawings, samples, or legacy parts to deliver parts that fit the first time.
Feature Type | Typical Tolerance | Inspection Method | Size Scope | Applicable Materials |
|---|---|---|---|---|
Turned diameters & journals | ±0.005mm | Micrometer / CMM | ≤Ø150mm | SS 316L, Al 7075, tool steel |
Milled pockets & contours | ±0.01mm | CMM / optical comparator | ≤300mm | Al 6061/7075, SS 304, POM |
Hole positions & pitch | ±0.01mm | CMM | Per drawing | All materials |
Surface finish (turned) | Ra 0.4–0.8μm | Surface roughness tester | Per part geometry | SS 304/316L, Al 6061 |
Surface finish (milled) | Ra 1.6–3.2μm | Surface roughness tester | Per part geometry | All materials |
Concentricity & runout | ≤0.005mm TIR | CMM / dial indicator | Shafts & rollers | SS, Al, tool steel |
Filling nozzles with anti-drip geometry, metering pump housings, piston shafts, and valve manifold blocks. Materials: SS 316L for direct food contact, PEEK for high-temperature sealing surfaces. Key requirement: zero leakage and high repeatability across millions of cycles.
Heat sealing plates, rotary sealing shafts, knife-edge blades, and pressure roller shafts. Materials: aluminum 7075 for lightweight moving parts, tool steel for cutting edges. Key requirement: thermal stability and consistent sealing pressure.
Applicator roller shafts, servo motor brackets, linear guide supports, star wheels, feed screws, and guide rails. Materials: aluminum 6061, SS 304, POM, UHMW-PE. Key requirement: high-speed synchronization and low-friction guidance.
Stainless Steel 316L —首选用于 direct food contact and washdown environments. Better pitting resistance than 304 in chloride-rich cleaning agents. Used for filling nozzles, valve blocks, and conveyor guides in beverage and pharmaceutical packaging lines.
Aluminum 7075 — High strength-to-weight ratio, ideal for moving components where reduced inertia improves cycle times. Used for sealing roller shafts, applicator arms, and servo brackets.
PEEK — High-temperature resistance (continuous use to 250°C) and excellent chemical resistance. Used for sealing surfaces, wear pads, and insulator components in high-speed sealing systems.
POM (Delrin) — Low friction coefficient and good dimensional stability. Used for star wheels, guide rails, and bushings in conveyor and handling systems.
Tool Steel (SKD11, 45#) — Wear resistance and edge retention. Used for cutting blades, forming dies, and high-wear tooling components.
Material certification — Mill test certificates traceable to the original material batch
Dimensional inspection report — CMM-verified critical dimensions with actual measured values
Surface finish verification — Ra values recorded for specified surfaces
Full traceability — Order number, material heat number, and machining program linked in our QMS
For projects requiring third-party inspection (SGS, BV, TÜV), we coordinate the inspection process and provide the necessary documentation.
Q1: Does ±0.005mm tolerance apply to all packaging equipment parts you manufacture?
A: No. ±0.005mm applies specifically to turned diameters and journals up to Ø150mm in rigid materials such as stainless steel and tool steel. Milled features are generally held to ±0.01mm, and larger or thin-walled parts may require project-specific tolerance assessment. We confirm achievable tolerances during the quotation stage based on your drawing.
Q2: Can you reverse-engineer replacement parts for legacy packaging machines?
A: Yes. We offer reverse engineering using CMM inspection and 3D scanning. Send us a sample or worn part, and we generate production drawings for your approval before machining. This is commonly used for discontinued OEM parts and aging packaging lines.
Q3: What is the typical lead time for precision packaging components?
A: Prototype quantities ship in 7–10 business days after drawing approval. Production runs of 50–500 pieces typically complete within 15–25 business days, depending on material availability and surface finish requirements.
Q4: What file formats do you accept for quoting?
A: We accept STEP, IGES, DWG, PDF, and native SolidWorks files. For 2D drawings, please include critical dimensions, tolerances, material specification, surface finish requirements, and quantity. If you only have a sample, we can quote from photos and dimensions.
Q5: How do you ensure food-safety compliance for packaging machine parts?
A: We machine food-contact components in SS 316L and provide material certifications confirming compliance with FDA and EU food-contact material requirements. Surface finishes for food-contact parts are held to Ra ≤0.8μm to prevent bacterial retention.
Need precision CNC components for your packaging equipment? Send your drawings, STEP files, or sample parts to sam@metalkeen.com or call +86-15358065975. We respond with a detailed quotation, tolerance assessment, and lead time within 24 hours.
