CNC Milling Services

Mechanical specifications:

Material: Aluminum 6061/6082/7075, Stainless Steel 303/304/316/631/17-4PH, Tool Steel, Copper/Brass, Titanium Alloy. Engineering plastics (POM, PEEK, PC, PA, PTFE, etc.).
Size range: from <5.00 mm to approximately 1,000 × 600 × 500mm structural components.
Processing accuracy: Conventional ±0.01-0.02 mm, high accuracy can reach ±0.007~±0.005mm (depending on the structure/material/inspection plan).
Surface roughness: milled Ra 3.2-1.6 μm, can be polished to Ra 0.8-0.2μm through precision machining/grinding.
Feature capability: Thin wall ≥0.3-0.5mm, micro hole ≥Ø0.5mm, deep cavity/narrow groove, high slope 3D free-form surface. 4/5-axis multi face machining with one-time clamping.
Surface treatment (finishing): Johoty provides standard sulfuric acid/hard/chromic acid anodizing. Chemical nickel plating, hard chromium/zinc/nickel plating, stainless steel/aluminum alloy passivation/aluminum alloy conductive oxidation/steel phosphating. PVD/powder/PTFE coating, sandblasting/mechanical polishing/mirror processing/wire drawing/vibration grinding/magnetic grinding.

Functional applications, key performance, adaptability of CNC milling services and parts:

Typical applications: high-end electronic casings, heat dissipation substrates and cold plates, RF/5G module sockets. Motion control parts, gearboxes/bearing seats, robots and automation components. Fixtures and testing fixtures, small batch prototypes, and engineering validation parts.

Key performance:

• High consistency and repeatability of multiple mating parts.
• Control the deformation and accuracy of long, thin-walled, and complex multi-faceted components.
• Control the reference surface/reference hole for subsequent processes such as grinding, electroplating, anodizing, and spraying.

Compatibility:

• Supports mainstream CAD data: STEP/IGES/DWG/DFF.
• Familiar with metric/imperial threads, locating pins, bearing seats, oil seal grooves, and linear guides.
• Control flatness, parallelism, coaxiality, and positional accuracy according to GD&T requirements. Suitable for loading high-precision automation, semiconductor, medical, and optical instruments.

Johoty’s values on CNC milling services and parts:

Can understand you: engineers communicate with you. Advance DFM/DFS: wall thickness, tool accessibility, clamping and deformation risks, assembly benchmarks, to reduce trial and error costs.
True flexible customization: Proficient in high mix small batch, from single piece validation to multi batch engineering parts. Including unconventional structures, hidden features, and non-standard interfaces.
Traceable quality: Complete process and testing records to meet your quality system requirements. Provide dimension reports, material/heat treatment/surface treatment certificates.
Suitable for confidential projects: strict drawing and sample confidentiality process, applicable to new products, patented structures, and sensitive projects that have not yet been made public.
Made in China + Engineering Thinking: Scalable Capacity + Stable Delivery Time + Controlled Costs. Suitable as a long-term CNC milling services and precision parts and service base for your engineering team.

   Catalogs of CNC milling services and parts:

Extreme dimensional tolerances & manufacturability of complex geometries (DFM):

Engineer’s Challenges:

• Can we achieve a stable tolerance of ± 0.005-0.01mm?
• Can deep cavities, thin walls, small chamfers, irregular surfaces, and mixed geometry planes+free-form surfaces really be produced and mass-produced?
• GD&T positional tolerance annotation is complex, can Johoty understand and calculate it accurately?

Johoty’s solutions:

Direct quantification of tolerance and capability range:

• Milling size capability: The tolerance of conventional CNC parts can be controlled to ± 0.01mm, and key features can be evaluated to ± 0.005mm (depending on the material and structure).
• The annotation supports ISO 2768 and ASME Y14.5.

DFM Participation & Design Optimization:

• Participate in the manufacturability review in advance and suggest the direction of tool entry, fixture design, adjustment of meat thickness/rib position, and minimum R-angle.
• Clearly identify high-risk areas such as deep narrow grooves, extremely thin walls, and localized heat concentration, and provide executable design solutions.

Complex Geometry:

• Indicate the configuration of 3/4/5 axis equipment, capable of processing multi-faceted aviation brackets, medical shells, and robot joint seats that can be clamped at once.
• The parts containing cross oil lines, blind holes, and step cavities can ensure coaxiality and positional accuracy.

Multiple materials & strength, surface, lifespan, performance requirements:

Engineer’s Challenges:

• Can aviation materials such as aluminum alloy, mold steel, stainless steel, titanium alloy, engineering plastics, and composite materials be processed stably like 6061 aluminum and ordinary steel?
• Can the indicators of surface roughness, coating, anode, and hardening be strictly controlled?
• Is the performance consistent between small-scale trial production, pilot qualification testing, and mass production?

Johoty’s solutions:

Material coverage and data experience:

• Johoty can process 6061/7075 aluminum, 17-4PH/316L stainless steel, P20/S136 mold steel, Ti-6Al-4V titanium alloy, PEEK/PC/nylon, etc.
• Johoty has developed standard process cards for cutting parameters, tool selection, stress relief, and heat treatment processes for different materials.

Surface and finishing ability:

• The surface roughness is Ra 0.8-3.2µm, which can achieve Ra 0.2µm.
  Implement post-treatment processes such as anodizing, hard anodizing, electroplating, sandblasting, blackening, nickel plating, chrome plating, and coating.

Performance and consistency control:

• For load-bearing/moving parts, Johoty can meet the design expectations of engineers through hardness testing, salt spray testing, fatigue or torque testing.
• Small batch samples and mass production use the same process route to ensure consistency in performance and size.

Quality traceability, document system & communication collaboration:

Engineer’s Challenges:

• How does Johoty ensure that the first/Nth batch sizes are the same?
• Is there a complete inspection report, material certification, and process traceability?
• How to efficiently collaborate with time difference, language, requirement changes, and design iterations?

Johoty’s solutions:

Quality System and Testing Capability:

• ISO 9001 guides CNC machining to achieve high precision and consistency in CNC milling services and parts.
• Coordinate measuring machines (CMM), height gauges, projectors, roughness gauges, and hardness testers can detect key features.
• FAI’s first article inspection report, dimensional full inspection report, and PPAP/CPK/SPC are often available for customers with automotive/bulk demand.

Traceability and Batch Management:

• Each batch of CNC milling services and parts has a unique batch number. Traceable to raw material furnace number, processing technology card, and inspection records.
• Important parts support barcode/QR code identification for storage and on-site tracking.

Communication and project management:

• Equipped with project engineers familiar with engineering English for coordination, supporting communication of GD&T, BOM, and process requirement notes according to drawings.
• For samples and NPI, milestone node management is adopted: drawing confirmation, DFM feedback, sample delivery time, and mass production ramp up plan.
• Use a fixed communication rhythm: weekly status update emails + real-time feedback on critical size issues to reduce cross time zone information delays.

Johoty’s CNC milling services and parts offer quantifiable and reproducible high precision and geometric consistency

Issues that engineers often care about:

• Can the critical dimensions remain stable in the middle of the tolerance zone for a long time, rather than barely at the edges?
• What is the size drift between multiple workstations and batches?
• Will cumulative tolerances become a hazard during assembly?

Johoty’s abilities:

• Johoty’s CNC system is based on high-resolution encoders and laser interferometers for real-time monitoring and compensation of tool displacement. Maintaining micrometer level position and achieving ± 0.007 mm control on key features for high-end applications.
• Using a temperature control system and specialized coolant, thermal stability management is carried out on the machine tool body, cutting tools, and workpiece materials. Reduce size deviation caused by temperature drift.
• Cooperate with high-precision fixtures and automatic positioning systems to reduce benchmark errors during repeated clamping and multi process transitions. Ensure consistency in geometric relationships.

Benefits for engineers:

• In the assembly design that requires tolerance stack up, Johoty provides precision data that can be engineered. It is beneficial for you to have clear input in DFMEA/reliability analysis.
• For valve bodies, guide rails, connectors, etc. that require long-term mass production, micrometer level size control and thermal stability management. It can reduce the workload of research, repair, and rework between batches, and lower the uncertainty of the assembly site.

Johoty’s CNC milling services and parts have the ability to form complex geometries and concealed features in one clamping process:

Engineer wants to know:

• Can Johoty solve these difficult machining features on my drawings all at once? Including slanted holes, variable cross-section cavities, thin walls, non-standard chamfers, sealing grooves, and hidden reference surfaces. Instead of letting me break it down into two or three companies myself?

Johoty’s abilities:

• Use multi axis or five axis machining centers for synchronous machining. It can simultaneously cut complex surfaces and spatial features from multiple angles, reducing repetitive clamping.
• High frequency vibration cutting technology reduces cutting heat and chip removal difficulty. The processing of deep cavities, slender structures, and thin-walled parts is more stable, improving surface quality and reducing deformation risks.
• Johoty has the ability to process combination features such as unconventional threads and thin-walled cavities, which can be transferred to the comprehensive processing of milling parts.

Benefits for engineers:

• Reduce process splitting and multiple outsourcing: Complex CNC milling services and parts can complete most key features in the same clamping system. Reduce benchmark deviation caused by repeated alignment and clamping.
• Internal flow channels, sealing steps, eccentric holes, misaligned grooves, etc., reduce performance fluctuations caused by geometric errors in the later stage. Because a single clamping process can better ensure the spatial relationship and coaxiality/parallelism between these features.
• Fluid control components, precision guide components, medical device structural components, and optomechanical structural components can ensure accuracy. Because many problems do not arise from a single size, but from deviations in complex geometric relationships.

Our CNC milling services and parts provide comprehensive control of various high-strength materials and surface integrity:

Engineer’s Challenge:

• Many suppliers are only good at conventional aluminum parts. However, on stainless steel, titanium alloy, high nickel alloy, or engineering plastics, accuracy, deformation, and surface integrity are difficult to guarantee.
• High end applications require a comprehensive effect of material and surface conditions such as fatigue life, corrosion performance, contact stress, friction and wear, not just size OK.

Johoty’s abilities:

• Johoty has experience in precision machining of stainless steel, aluminum alloys, titanium alloys, and high nickel alloys. We can adapt the tool and cooling method to control the machining temperature rise and thermal deformation.
• Process optimization and tool planning achieve a balance between material removal rate and cutting force. Reduce residual stress and deformation risk, suitable for thin-walled parts, slender shafts, and complex shells.
• Johoty can meet the strict requirements for surface roughness, corrosion resistance, and wear resistance of parts through precision grinding, polishing, and surface coating processes.

Benefits for engineers:

• Johoty can achieve 304/316 stainless steel, 7075 aluminum, Ti alloy, and engineering plastics. Beneficial for simplifying the overall BOM and supply chain, reducing cross supplier quality inconsistencies.
• When verifying fatigue, sealing, and friction pair performance, Johoty can comprehensively control material and surface integrity. Engineers can more confidently correlate simulation and experimental results with the machining process.
• The materials and surface conditions of aviation, medical, and automotive safety components often directly determine the failure mode. A stable and reproducible process is more valuable than making a single sample beautifully.

Our CNC milling services and parts engineering customization process from design collaboration to quality traceability:

Engineer’s Challenges:

• Can suppliers participate in DFM/DFX during the design phase and expose manufacturing risks in advance?
• Do samples, trials, small batches, and mass production share the same set of process ideas and quality standards?
• Are quality records, testing data, material batches, etc. traceable and auditable?

Johoty’s process and system:

• Johoty can provide CAD design support, material selection recommendations, CNC machining process optimization, trial production and testing, quality control to packaging. Build a collaborative platform for engineering teams.
• Embedded automatic detection and feedback for real-time detection of size, shape, and surface condition. Adjust process parameters immediately when deviations occur, without relying on final inspection to eliminate defective products afterwards.
• Standardized dimensional inspection, roughness and geometric accuracy testing, material and process recording, form a complete quality traceability chain. Meet the requirements of high-end industries for process documents and data.

Benefits for engineers:

• CNC milling services and parts have consistency from original concepts, engineering prototypes, small batch validation to mass production. Johoty manages with the same logic and quality framework, not one set of methods for sample production and another set of methods for mass production. For new platform development and customized subsystems that require multiple iterations, high consistency is crucial.
• You can use Johoty’s DFM/process optimization suggestions to avoid creating drawings that are theoretically feasible, have extremely high actual processing costs, or pose significant risks. Reduce post production rework and design changes.
• For medical devices, automotive components, and industrial safety equipment, there must be clear quality records and process traceability. This is beneficial for passing customer audits, third-party certifications, or on-site audits.