Turn-mill compound
Our conventional turn-mill compound machining tolerances are controlled within ±0.01mm, while precision machining can achieve tolerances as tight as ±0.008mm or even smaller. For any component machining needs and precision requirements, please contact us for a quote.
What is turn mill compound machining ?
Turn-mill compound machining utilizes turning-milling composite machine tools to perform multiple machining processes—including turning, milling, drilling, and tapping—on a single machine according to pre-set CNC programs. This achieves integrated processing of diverse operations on a single machine.
Custom material for turn-mill compound machining
Our turn-mill compound CNC machining centers boast over a decade of production experience, capable of precision machining and cutting approximately one hundred materials with tolerances as tight as 0.005mm. Below are our commonly used material options for CNC machined parts. Should you require machining of other unique materials, please contact us for further information.
Metal material :
Aluminum
Aluminum is the most commonly used precision-machined component. It has a low density, a hard texture, and a soft material. Thanks to its corrosion resistance, it is widely used in aerospace, bionic bones, and automotive parts manufacturing.
Color : Silver.
Types : Aluminum 6061、7075、2024、5052、6063 and MIC-6.
Surface finish : Polishing, Brushing, Sandblasting, Chrome Plating, Anodizing, Electroplating, Powder Coating, Laser Etching.
Delivery time : 1-5 days.
Stainless steel
Stainless steel offers strong corrosion resistance and a smooth, easy-to-clean surface. It is primarily used in kitchen equipment components, medical devices, building materials and construction, as well as automotive parts.
Color : Silver.
Types : Stainless steel 304/316/201/202/430/444/410/420/440c/2205/2507/17-4ph/17-7ph.
Surface finish : Polishing, Brushing, Sandblasting, Electroplating, Spraying, PVD (Physical Vapor Deposition), Passivation, Pickling, Coloring.
Delivery time : 2-5 days.
Copper
Possesses electrical conductivity, tensile ductility, and antimicrobial properties, primarily used for processing into crafts, decorative items, and medical equipment.
Color :Orange,yellow.
Types : copper H59/H62/Hpb59-1/C36000/HAI77-2/HSN62-1/HPb/HMn/HAl/HSn/HNi.
Surface finish : Passivation, Electroplating, Chemical Plating, Shot Peening, Sandblasting, Chemical Film Treatment, Polishing, Bright Cleaning.
Delivery time : 1-5 days.
Bronze
Bronze is an alloy of copper and tin （possibly including lead, zinc, and phosphorus），low melting point (800-900°C) and excellent fluidity, along with corrosion resistance. Low-tin bronze exhibits a golden yellow hue, while high-tin bronze appears grayish-white or silver-gray. It is primarily used in mechanical manufacturing for sculptures, bearings, gears, valves, as well as in marine engineering components such as propellers, as well as marine engineering components like hull fittings and water pumps.
Color : gold/brown.
Types : Tin bronze, aluminum bronze, beryllium bronze, silicon bronze, manganese bronze.
Surface finish : Sandblasting, polishing, knurling, grinding, passivation, chemical film coating, impregnation coloring, brush/spray coloring, electroplating, anodizing, powder coating, brushing.
Delivery time : 1-5 days.
Steel
Iron alloyed with carbon (typically 0.1%-1.7%) and other alloying elements (such as chromium, nickel, manganese, etc.). By adjusting composition and heat treatment processes, diverse properties can be achieved, including high strength, high toughness, wear resistance, and corrosion resistance. It is suitable for producing components such as bolts, shafts, gears, drill bits, milling cutters, and turning tools, and is also frequently used in manufacturing engine valves and turbine blades.
Color : Silver .
Types : Steel S20C,S45C,S50C,SK85,SK95,40Cr,4140,4130,H13,D2,W1,A2,D2,M2,SKD11,ASP-23,S136.
Surface finish :Sandblasting, Mirror Finish, PVD Coating, Brushed Finish, Spray Coating, Electroplating.
Delivery time : 1-5 days
Magnesium
Magnesium has a density approximately two-thirds that of aluminum and one-quarter that of steel. Its low hardness results in minimal cutting force and reduced tool wear. With superior thermal conductivity compared to aluminum, it saves CNC machining time and material. Its strength-to-weight ratio outperforms both aluminum alloys and steel, while its damping capacity is 1.5 times that of aluminum, effectively absorbing vibrations and noise. These properties make it an ideal material for aerospace, automotive, and electronics industries.
Color : Silver.
Types : Magnesium alloy AZ91D/AM60B/AM50A/AS41B/ZK60/MB8/AZ31/WE43/ZE41/LA141/LZ91.
Surface finish : Chemical conversion coating, anodizing, nickel plating, electroplating, composite coating, spray painting, powder coating, electrophoretic coating.
Delivery time : 1-5 days.
Plastic material :
ABS
Combining the rigidity of acrylonitrile, the toughness of butadiene, and the processability of styrene, it offers excellent impact resistance (maintaining toughness even at low temperatures) with a balanced hardness and rigidity. Suitable for precision components subjected to moderate loads, it is ideal for manufacturing precision parts such as electronic and electrical enclosures, automotive ducting, interior trim components, and exterior trim components.
Color : Beige,black.
Types : General-purpose, flame-retardant, heat-resistant, high-impact-resistant, transparent (MBS), filled modified, alloyed, functionalized ABS.
Surface finish :Spray coating, electroplating, screen printing, laser engraving, hot stamping, vacuum coating, water transfer printing, sandblasting, anti-fingerprint coating.
Delivery time : 1-5 days.
PC
High-performance thermoplastic with high toughness (low-temp resilient) and rigidity, ideal for CNC precision machining (cutting, drilling). Lighter than acrylic, it offers strong creep resistance and high-frequency insulation, suited for stress-resistant, insulated components. Eco-friendly via recycling by melting, used in electronics casings, spectrometer mounts, heat sinks.
Color : white or black.
Types : General Machinable/Flame Retardant/Reinforced/Blended PC.
Surface finish : Polishing, Hardening, Spraying, Laser Engraving, Electroplating, Hot Stamping.
Delivery time : 1-5 days.
PMMA
With a light transmittance as high as 92%, it is hailed as “plastic crystal,” serving as material for optical components such as lenses and light guides. Its optical uniformity surpasses that of ordinary glass, while weighing only half as much. It offers easy machinability, moderate thermal stability, low shrinkage, and impact resistance. Primarily used in consumer electronics industries for display protective covers, lenses, and mobile phone frames.
Color : clear,white,black,colored.
Types : General-purpose / Impact-resistant / Heat-resistant / Pearlescent.
Surface finish : Polishing, enhanced coating, sandblasting for texture, printing for coloring, anti-scratch and anti-fingerprint treatments.
Delivery time : 1-5 days.
POM
High tensile strength and low friction coefficient, excellent dimensional stability, easy machinability, can replace metal as raw material for wear-resistant components such as gears and bearings, widely used in automotive industry, industrial machinery,medical tools, etc.
Color : white,black,blue,yellow,etc.
Types : POM-H, POM-C.
Surface finish : Polishing, sandblasting, chemical polishing, laser polishing, anodizing/painting.
Delivery time : 1-5 days.
PA
PA (Polyamide, Nylon) exhibits tensile strength ranging from 62 to 85 MPa, low friction coefficient, and excellent heat resistance. Primarily used in high-load structural components such as gears and bearings, it facilitates the manufacturing of automotive parts, consumer electronics, and industrial machinery components.
Color : Colored.
Types : PA6, PA66, PA6T, PA9T.
Surface finish :Mechanical grinding, acid/alkali etching, hydrolysis technology, coating.
Delivery time : 1-5 days.
PE
PE (Polyethylene) is a thermoplastic material with a low melting point. During machining, tool temperature must be controlled to prevent adhesion, resulting in a smooth, burr-free surface. Its low friction and self-lubricating properties make it suitable for sliding/rotating components. It resists most acids, alkalis, salts, and organic solvents but is soluble in aromatic hydrocarbons and halogenated hydrocarbons. Common applications include food containers, trash bins, and toys.
Color : black,white,colored.
Types : LDPE, HDPE, UHMWPE, PEX, PEX-A, PEX-B.
Surface finish :Polishing, sandblasting, coating, etching.
Delivery time : 1-5 days.
PEEK
PEEK (Polyetheretherketone) is a semi-crystalline specialty engineering plastic characterized by high strength, high melting point, and low friction coefficient. It offers excellent chemical resistance and is suitable for aerospace structural components, high-temperature parts, and medical devices such as endoscopes and handles.
Color : Beige,black.
Types : CF-PEEK, GF-PEEK, PEEK with carbon black/ceramic/PTFE/graphite fillers.
Surface finish :Sandblasting, polishing, metal coating, polymer coating.
Delivery time : 1-5 days.
PP
PP (Polypropylene) is a semi-crystalline thermoplastic with a melting point of approximately 130-160°C. It exhibits excellent processing flow properties. During CNC machining, temperature control is essential (recommended range: 200-230°C). It is suitable for repeated bending operations. Tool selection must align with the material’s characteristics. Primarily used for containers, connectors, and structural components.
Color : black,white,colored.
Types : PP-H, PP-B, PP-R, HIPP.
Surface finish :Polishing, Sandblasting, Coating.
Delivery time : 1-5 days.
HDPE
HDPE (High-Density Polyethylene) is a linear thermoplastic with excellent impact resistance and dimensional stability.Non-toxic and odorless, it is suitable for manufacturing valves, pump bodies, gears, sliding bearings, and as core material for surfboards.
Color : black,white.
Types : HI-HDPE, UV-HDPE, UHMWPE, Carbon Black-Filled HDPE.
Surface finish :Polishing, Sandblasting, Coating.
Delivery time : 1-5 days.
HIPS
HIPS is a non-crystalline thermoplastic containing 5-15% rubber content, offering both high impact resistance and ease of processing. It features moderate surface hardness, low moisture absorption (0.05-0.7%), low cost, and suitability for complex structures. Widely used in appliance housings, food packaging, automotive interiors, and industrial piping, it replaces metal to meet lightweight and impact-resistant requirements.
Color : black.
Types : Impact-resistant HIPS, Brominated flame-retardant HIPS, Glass-fiber reinforced HIPS.
Surface finish :Polishing ，Sandblasting ，Coating.
Delivery time : 1-5 days.
Surface finishes for turn-mill compound parts
Leveraging over a decade of expertise in CNC machining and surface finish technologies, Weldo has integrated the following finishing solutions designed to enhance the surface quality and finish of parts following turn-mill compound operations. This process not only optimizes component appearance, surface roughness, hardness, and corrosion resistance but also effectively eliminates tool marks.
Machined finish
The prototype processed by the machine tool retains traces of tool machining.
Anodizing
Anodizing enhances the corrosion and wear resistance of metals and enables coloring and coating, suitable for metals.
Polish
Polishing enhances surface finish and aesthetic appeal, suitable for materials such as metals, ceramics, plastics, and PMMA.
Sand blasting
Sandblasting involves propelling abrasive material at high pressure or mechanically onto a workpiece to achieve a clean, roughened, and matte finish.
Brushed finish
Brushed finish creates a textured pattern on metal surfaces, enhancing aesthetic appeal. Suitable for aluminum, copper, stainless steel, and other materials.
Powder coating
Powder coating is applied to the workpiece surface via electrostatic adhesion, then cured at high temperatures to form a dense coating, enhancing the corrosion resistance of metal and plastic surfaces.
Electroplating finish
Metal plating is deposited onto material surfaces through electrolytic processes to enhance corrosion resistance and wear resistance. This technique is suitable for metals and certain plastics.
Black oxidize
A black oxide coating is formed on metal surfaces through chemical oxidation, offering low cost, a simple process, and reduced light reflection.
Alodine
Forms a protective coating on surfaces through chemical conversion, enhancing corrosion resistance and adhesion. Environmentally friendly with excellent conductivity, suitable for aluminum and magnesium alloys.
Heat treatment
By altering the internal microstructure of metallic materials through heating, enhances hardness, strength, toughness, and wear resistance. suitable for metals such as steel, aluminum alloys, copper alloys, and titanium alloys.
Turn-mill compound cnc machining capability
Our ISO 9001 certification demonstrates that our Turn-mill compound parts meet stringent tolerance requirements. We adhere to ISO-2768f tolerance standards for CNC-milled metals and ISO-2768m for plastic parts, enabling you to obtain CNC-machined components with high-precision machining standards.
| Property | Description |
|---|---|
| Maximum Part Size | Maximum machining diameter 600 mm and length 1200 mm. Turn-mill compound machining enables multiple operations in one setup for complex parts. |
| Minimum Part Size | Minimum machinable diameter down to 3 mm, depending on part geometry and material. |
| General Tolerance | Standard tolerance ±0.01 mm; tighter tolerances down to ±0.005 mm achievable by reducing re-clamping. |
| Lead Time | Prototypes in 1–3 days; small-batch production in 3–5 days, with expedited options in 24–48 hours. |
Turn-mill compound cnc machining design guideline
| Item | Recommended Size |
|---|---|
| Radii | Minimum inner radius ≥ 2 mm. Large contour radii and rotational profiles can be machined efficiently with turn-mill compound machining, depending on part geometry and material. |
| Threads and Tapped Holes | External and internal threads from M2 to M50 can be machined with combined turning and milling operations. A minimum thread length of 1.5× the diameter is recommended to ensure stability. |
| Minimum Wall Thickness | Recommended minimum wall thickness: 1 mm for metals and 1.5 mm for plastics to maintain rigidity during turn-mill compound machining. |
| Text | Recommended engraving depth 0.5–2 mm with character height 1–10 mm. Multi-face engraving can be completed efficiently using turn-mill compound setups. |
| Holes | Minimum machinable hole diameter 1 mm. Recommended hole depth ≤ 5× diameter; maximum achievable depth up to 10× diameter under stable machining conditions. |
Turn-mill compound cnc parts display
Our turn-compound CNC machining services effortlessly handle Complex surfaces, three-dimensional solids machining, encompassing plastics, metals, large components, and small-batch production. Tolerances can be controlled to as low as 0.001 inch.
Advantage of cnc turn-mill compound machining
Enhanced Precision and Quality: Multiple processes completed in a single setup minimize positioning errors. For precision shaft machining, this ensures dimensional accuracy across all sections while leveraging milling to compensate for turning limitations, thereby improving overall precision.
Boosting Production Efficiency: Eliminates workpiece transfer and multiple setup/alignment times. For parts with complex surfaces and hole patterns, traditional methods require multiple machines and transfers, whereas turning-milling integration completes them in a single setup, shortening cycles and reducing costs.
Enhanced Process Flexibility: Capable of handling diverse complex shapes—whether rotary or non-rotary—through optimized programming and tool selection for efficient machining.
Optimized Surface Quality: Flexible selection of machining methods and cutting parameters based on part requirements, meeting stringent surface quality demands for optical components, precision molds, and similar applications.
Application of turn-mill compound part
Aerospace: Components feature complex structures, stringent precision requirements, and specialized materials. Examples include aircraft engine turbine blades and spacecraft fuel tanks, where turning-milling integration enables precise machining to ensure performance and reliability.
Automotive Manufacturing: Used for machining critical components such as engine crankshafts, camshafts, transmission gears, and drive shafts, ensuring dimensional accuracy and enhancing production efficiency.
Medical Devices: Demands stringent precision, surface quality, and biocompatibility. Small precision components like artificial joints and dental implants achieve high-accuracy manufacturing through turning-milling integration.
Mold Manufacturing: Mold cavities and cores feature complex structures. Turning-milling integration enables rapid, precise machining, enhancing mold accuracy and efficiency while shortening development cycles.
FAQ of turn-mill compound
Is programming complex curved surfaces for turn-mill compound machining difficult?
Yes. Complex curved surfaces have irregular geometries, making modeling and programming challenging. Although CAM software can generate toolpaths from 3D models, programmers still need to review and optimize them to ensure feasibility and machining quality. Strong spatial understanding and experience are required.
Is troubleshooting turn-mill compound machines complex?
Yes. Turn-mill compound machines integrate mechanical, electrical, and control systems, so faults may originate from multiple areas. Effective troubleshooting requires multidisciplinary expertise, and major repairs often need specialized equipment or support from the machine supplier.
Is turn-mill compound machining suitable for small-batch production?
Yes. Turn-mill compound machining completes multiple processes in a single setup, reducing setup time, part transfers, and cumulative errors. Despite higher equipment costs, improved efficiency, accuracy, and consistency make it well suited for small-batch and multi-variety production.
How is cutting heat controlled in turn-mill compound machining?
Cutting heat is managed by optimizing cutting parameters, using coolant or high-pressure cooling, and selecting appropriate tool materials and geometries. Effective heat control reduces thermal deformation and helps maintain machining accuracy and surface quality.
What is the difference between turn-mill compound machining and 5-axis machining?
Differences:
Turn-mill machining integrates turning and milling in one setup and is suited for rotary or mixed-feature parts. Five-axis machining excels at high-precision processing of complex freeform surfaces.
Connection:
Both are advanced machining technologies and often complement each other. In practice, turn-mill machining may be used for rough or integrated processing, followed by 5-axis machining for high-precision finishing.
