CNC Machined Housings
We manufacture custom CNC machined housings from customer drawings and CAD files, including electronic enclosures, gearbox housings, pump housings and volutes, valve bodies, bearing housings, sensor and transducer housings, instrument cases, junction boxes, motor end bells, RF and waveguide housings and hydraulic manifolds. Our 3-axis and 5-axis CNC milling, drilling, boring, deep-hole drilling and thread-milling capabilities produce accurate, leak-tight housings for machinery, automation, hydraulics, motors, electronics, instrumentation and outdoor equipment.
A housing contains and protects components, so bore concentricity, sealing-face flatness, wall thickness, pocket position and thread location decide whether internals fit, rotate true and seal against pressure or ingress. We machine housings from aluminum (6061-T6, 6063-T5, 7075-T6, 5083), stainless steel (303, 304, 304L, 316, 316L, 17-4 PH), carbon and alloy steel (1045, 4140, 4340, Q355-type plate), brass (C36000, C46400), copper (C10100, C11000) and titanium (Grade 2, Grade 5), machined from solid block and plate - not cast - so internal features are cut to the drawing for prototypes and low-volume production. Parts are manufactured to specified dimensions, tolerances, materials and finishing requirements, with material certificates available on request.
Types of CNC Machined Housings We Manufacture
We machine a wide range of housing types. Below are the most common; if your drawing shows a different configuration, send it for review.
Enclosures & Boxes
Sealed enclosures and cases for electronics and controls.
Materials: 6061-T6 · 5052-H32 · 304 · C36000
Gearbox Housings
Bearing bores and pockets for gear and shaft assemblies.
Materials: 6061-T6 · 4140 · 4340 · 7075-T6
Pump Housings & Volutes
Cavities, ports and bearing seats for pumps.
Materials: 316L · 304 · 4140 · C95400
Valve Bodies
Flow cavities, ports and seat bores for valves.
Materials: 316L · 304 · 17-4 PH · C36000
Bearing Housings
Pillow blocks and flanged seats with precise bores.
Materials: 4140 · 4340 · 6061-T6 · 316L
Sensor & Transducer Housings
Pressure-tight cases for probes and transducers.
Materials: 17-4 PH · 316L · Grade 5 titanium · 304
Instrument Cases
Housings for gauges, meters and measurement devices.
Materials: 6061-T6 · 304 · C36000 · C46400
Junction Boxes
Cable glands, terminals and mounting for wiring.
Materials: 6061-T6 · 316L · 304 · Q355
Motor End Bells
End caps and bearing plates for electric motors.
Materials: 6061-T6 · 6063-T5 · 4140 · 304
RF & Waveguide Housings
Conductive enclosures for RF and microwave assemblies.
Materials: 6061-T6 · C11000 · C10100 · 303
Hydraulic Manifolds
Valve-block bodies with intersecting drilled passages.
Materials: 6061-T6 · 4140 · 316L · 17-4 PH
Custom Machined Housings
One-off structural and equipment housings from solid block.
Materials: 7075-T6 · 4340 · 17-4 PH · Grade 5 titanium
Have a Custom Housing? Send Your Drawing
CNC Machining Processes for Housings
3-Axis CNC Milling
Best for: Pockets · walls · faces · holes
The primary process for boxes, lids and rectangular housings.
4/5-Axis CNC Milling
Best for: Internal features · compound angles
Machines internal pockets and bores in fewer setups for accuracy.
Boring & Precision Bores
Best for: Bearing seats · valve bores
Concentric bores held to H7 with true-running seal faces.
Deep-Hole Drilling
Best for: Manifold passages · cooling channels
Straight intersecting holes for hydraulic and cooling circuits.
Thread Milling & Tapping
Best for: Inserts · lids · ports
Blind and through threads, sealed port threads and inserts.
Deburring & Edge Finishing
Best for: Internal edges · sealing faces
Burr-free internal corners and chamfers for assembly and sealing.
CNC Housing Materials
For housings, material selection depends on weight, stiffness, pressure, corrosion environment, EMI and appearance. We machine housings from the metal materials listed below - aluminum, stainless steel, carbon and alloy steel, brass, copper and titanium.
| Material | Common Grades | Typical Housing Applications | Key Advantages |
|---|---|---|---|
| Aluminum | 6061-T6 · 6063-T5 · 7075-T6 · 5083 · 5052-H32 | Enclosures, gearbox and motor housings, RF cases | High strength-to-weight, corrosion resistance, anodizable; 6061-T6 is the general-purpose standard |
| Stainless Steel | 303 · 304 · 304L · 316 · 316L · 17-4 PH | Pump and valve bodies, sensor housings, marine enclosures | Corrosion resistance; 316L suits chloride environments; 17-4 PH adds strength |
| Carbon & Alloy Steel | 1045 · 4140 · 4340 · Q355-type structural plate | Gearbox, bearing and hydraulic manifold housings | High stiffness and strength for loaded and pressurized housings |
| Brass | C36000 free-cutting brass · C46400 naval brass | Instrument and valve-body housings, non-magnetic cases | Excellent machinability, corrosion resistance, non-magnetic |
| Copper | C10100 (OFHC) · C11000 electrolytic copper | RF and conductive enclosures, EMI shielding cases | High electrical and thermal conductivity |
| Titanium | Grade 2 (CP) · Grade 5 (Ti-6Al-4V) | Marine, chemical and lightweight high-strength housings | Outstanding corrosion resistance with the best strength-to-weight |
Housing Geometry & Sealing Features
Housings are defined by their internal and mounting features. The items below decide whether internal parts fit, rotate true and seal. We machine them to drawing, and tighter on request.
| Feature | Typical Capability | Why It Matters for Housings |
|---|---|---|
| Bore / Bearing Seat | ±0.01–0.02 mm; H7 with run-out <0.01 mm | Shafts and bearings run true and last longer |
| Sealing-Face Flatness | 0.02–0.05 mm over the face | O-ring and gasket faces seal without leakage |
| Wall Thickness | ±0.1–0.2 mm (precision to ±0.05 mm) | Strength, pressure rating and weight control |
| Pocket & Cavity Position | ±0.03–0.05 mm | Internal parts clear and seat correctly |
| O-Ring Grooves | Profile and depth ±0.05 mm | Repeatable seal compression on lid and port faces |
| Mounting Hole Pattern | ±0.05–0.1 mm (precision to ±0.02 mm) | Housings bolt up to frames and equipment |
| Threaded Inserts & Holes | ISO 6g / 6H or per drawing | Lids, ports and fittings attach securely |
| Dowel & Locating Features | ±0.01 mm reamed locations | Lids and halves register and repeat |
| Surface Roughness | Ra 0.8–3.2 μm; Ra 0.4–0.8 μm on request | Sealing faces, bearing bores and appearance |
| Critical Dimensions | ±0.01 mm (precision to ±0.005 mm) | Gauge-quality and alignment features |
Critical Features We Control
Bores & Bearing Seats - turned and bored concentric, with run-out controlled so shafts and bearings run true.
Sealing Faces - lid, flange and port faces machined flat, with O-ring grooves cut to profile and depth.
Internal Pockets - cavities, ribs and ribs machined in one setup or with datums carried between setups for repeatability.
Wall Thickness - held uniform for strength, weight and pressure rating on thin-wall housings.
Threads & Inserts - metric, UNC/UNF and special threads with correct depth and strength; helicoil and press-in inserts on request.
Identification - part numbers or laser marking on request for traceability and assembly.
Heat Treatment & Stress Relief for CNC Housings
Loaded steel and high-strength aluminum housings are heat treated as specified by the drawing. Stress relief before finish machining keeps thin and large walls dimensionally stable.
| Heat Treatment | Applicable Grades | Typical Housing Parts |
|---|---|---|
| Quench & Temper | 1045 · 4140 · 4340 | Gearbox, bearing and hydraulic housings |
| Solution + Aging | 17-4 PH · 7075-T6 | High-strength stainless and aluminum housings |
| Stress Relieving | All steel grades · 6061-T6 | Large and thin-wall housings before finish milling |
| Normalizing | Carbon steel plate | Structural and weld-prep housings |
Surface Finishes for CNC Housings
Surface finish protects housings and prepares them for assembly, painting or anodized appearance requirements - while keeping sealing and bearing faces machined to standard.
| Surface Finish | Applicable Materials | Typical Housing Parts | Main Benefit |
|---|---|---|---|
| Anodizing (Type II / Hard III) | 6061-T6 · 6063-T5 · 7075-T6 · 5083 | Enclosures, motor and RF housings | Corrosion and wear resistance; color options |
| Chemical Conversion (Chromate) | Aluminum grades | Paint-ready electronics enclosures | Conductive corrosion protection; paint base |
| Electroless Nickel Plating | 4140 · 4340 · 1045 · Aluminum | Hydraulic and industrial housings | Uniform corrosion protection on all faces |
| Passivation | 303 · 304 · 316L · 17-4 PH | Pump, valve and marine housings | Removes free iron, improves corrosion resistance |
| Electropolishing | 304 · 316L | Food, medical and clean housings | Smooth, clean, bright surface |
| Zinc Plating | Carbon steel | General-purpose steel housings | Economical corrosion protection |
| Black Oxide | 1045 · 4140 · 4340 | Industrial and machinery housings | Economical corrosion protection; low buildup |
| Powder Coat / Paint Prep | Steel · Aluminum | Structural and outdoor housings | Machined paint-ready surfaces on request |
Housing Quality Control
We inspect bores, sealing faces, wall thickness, pocket positions and threads throughout production to ensure housings meet the drawing and assemble correctly. For documented projects, we can supply material certificates and inspection records to support your incoming inspection.
CMM Height Gauge Inspection
CMM Surface Plate Inspection
Go/No-Go Thread Gauge Inspection
Pin Gauge Micrometer Inspection
| Inspection Item | Equipment / Method | Typical Housing Parts |
|---|---|---|
| Bore & Bearing Seat | CMM · Bore Gauge · Indicator (run-out) | Gearbox, pump, bearing housings |
| Sealing-Face Flatness | CMM · Surface Plate & Indicator | Lid, flange and port faces |
| O-Ring Groove Profile | Profile Gauge · CMM | Sealed lids and ports |
| Wall Thickness | Ultrasonic · Caliper · CMM | Thin-wall and pressure housings |
| Pocket & Cavity Position | CMM | Internal features and ribs |
| Mounting Hole Pattern | CMM · Height Gauge | Enclosures, manifolds, boxes |
| Thread Inspection | Go/No-Go Thread Gauges | Lid and port threads, inserts |
| Surface Roughness | Roughness Tester | Sealing and bearing faces |
| Material Verification | Spectrometer + Material Certificate | Incoming raw material (EN 10204 3.1 available) |
| Final Inspection | CMM + Inspection Report | Final dimensional acceptance |
Need documented quality control? Send us your drawings and inspection requirements.
Prototype & Low-Volume Housing Machining
Housing projects often start with prototypes - new designs, fit checks of internal assemblies or replacements that must be tested before production. Machining from solid block avoids tooling and casting lead times, so prototypes and low volumes are practical. We support prototype and low-volume CNC machining from single samples to repeat small-batch orders.
Prototype Machining
For new designs, validation and fit checks.
Typical Quantity: 1–10 pcs
Low-Volume Production
For pilot systems and initial production runs.
Typical Quantity: 10–1,000+ pcs
Repeat Production
For spare housings and recurring orders with established designs.
Typical Quantity: Based on project requirements
Suitable for
Enclosures and electronic cases
Gearbox, pump and bearing housings
Valve bodies and hydraulic manifolds
Sensor, transducer and instrument housings
Junction boxes and motor end bells
RF, waveguide and custom structural housings
Packaging & Lead Time for CNC Machined Housings
Packaging
Surface Protection: PE bags, protective film on anodized and polished faces
Corrosion Protection: VCI paper for steel housings in overseas transit
Internal Protection: Caps or plugs on bore and port openings on request
Mixed Orders: Sorted by part number with labels and quantity checklists
Custom Packaging: Customer-specific packing requirements supported
Typical Lead Time
| Order Type | Typical Lead Time |
|---|---|
| Prototype | 5–10 working days |
| Low-Volume Order | 10–20 working days |
| Production Order | 15–30 working days |
| Repeat Order | 10–25 working days |
FAQ
Q: 1. What CNC machined housings can you manufacture?
A: We manufacture custom enclosures, gearbox housings, pump housings and volutes, valve bodies, bearing housings, sensor and transducer housings, instrument cases, junction boxes, motor end bells, RF and waveguide housings and hydraulic manifolds from customer drawings.
Q: 2. What materials do you machine housings from?
A: We machine housings from aluminum (6061-T6, 6063-T5, 7075-T6, 5083, 5052-H32), stainless steel (303, 304, 304L, 316, 316L, 17-4 PH), carbon and alloy steel (1045, 4140, 4340), brass (C36000, C46400), copper (C10100, C11000) and titanium (Grade 2, Grade 5).
Q: 3. Do you machine housings from solid material?
A: Yes. We machine housings from solid block and plate, so all internal pockets, bores and features are cut to the drawing - practical for prototypes and low volume without casting tooling.
Q: 4. What tolerances can you achieve on bores and sealing faces?
A: We typically hold ±0.01–0.02 mm on bearing bores (H7 with run-out below 0.01 mm), 0.02–0.05 mm sealing-face flatness, and ±0.01 mm (precision to ±0.005 mm) on critical dimensions.
Q: 5. Can you machine internal pockets and intersecting passages?
A: Yes. Our 3-axis and 5-axis milling and deep-hole drilling produce internal cavities, ribs and intersecting passages - such as hydraulic manifold circuits - in fewer setups for accuracy.
Q: 6. Can you machine O-ring grooves and sealed faces?
A: Yes. We cut O-ring grooves to profile and depth and machine flat, low-roughness sealing and flange faces for gasket and O-ring joints.
Q: 7. Can you machine thin-wall housings?
A: Yes. We control wall thickness to ±0.1–0.2 mm (precision to ±0.05 mm), with stress-relief cycles to keep thin and large walls dimensionally stable.
Q: 8. Can you machine conductive or EMI-shielding housings?
A: Yes. Copper (C10100, C11000) and aluminum housings provide high conductivity, and we can machine RF and waveguide enclosures with close internal tolerances.
Q: 9. What surface finishes do you offer for housings?
A: Anodizing (Type II / Hard III), chemical conversion coating, electroless nickel, passivation, electropolishing, zinc plating, black oxide and paint-ready machined surfaces.
Q: 10. Can you add inserts and helicoils?
A: Yes. We can machine for press-in and helical inserts and tap threads per drawing, including sealed port threads.
Q: 11. Can you supply material certificates and inspection reports?
A: Yes. We can provide material certificates (EN 10204 3.1), dimensional inspection reports, CMM reports and flatness records on request.
Q: 12. Do you accept 2D drawings and CAD files?
A: We can work from common STEP, STP, IGES, IGS, SolidWorks, DXF and 2D drawing files.
Q: 13. What is the typical lead time for CNC machined housings?
A: Typical lead times are 5–10 working days for prototypes, 10–20 working days for low-volume orders, and 15–30 working days for production orders, depending on complexity, quantity, material and finishing.
Send your 2D drawing or 3D CAD file, material grade, quantity and finishing requirements.
Hot Tags: cnc machined housings, China cnc machined housings manufacturers, suppliers, factory, titanium
Previous
CNC Machined FittingsYou Might Also Like
Send Inquiry