Turn-mill compound
- ISO 9001:2015 Certified
- Tolerance down to 0.002''
- Metal,plastic,composite can be machined
- Turn-mill machining cost:3-500 usd
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 cnc material type:
Aluminum
It features low density and a hard texture, yet the material itself is relatively pliable. Highly corrosion-resistant, it is widely utilized in the fields of aerospace, biomimetic skeletal structures, and automotive component 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
Corrosion-resistant, smooth, and easy to clean, used in kitchen, medical, construction, and 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 a corrosion-resistant copper alloy with good fluidity and varying color by composition. It’s used for parts like bearings, gears, and marine components.
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-based alloy with Cr, Ni, and Mn, offering adjustable properties via heat treatment. Used for bolts, shafts, gears, cutting tools, and engine components.
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
Lightweight and possesses low hardness, excellent thermal conductivity, and causes minimal tool wear. Its strength surpasses that of aluminum alloys and steel, and its damping capacity—1.5 times that of aluminum—enables it to effectively absorb vibrations and noise. Suited for use in aerospace and automotive components.
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 cnc material type:
ABS
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, transfer printing, sandblasting.
Delivery time : 1-5 days.
PVC
PVC is a robust, dense material characterized by excellent tensile strength and moderate elongation. Due to its resistance to chemical corrosion and aging, it is an ideal choice for corrosive environments.
Color : White,Beige,black.
Types : Rigid PVC and Flexible PVC.
Surface finish : Painting and plating, polishing, sanding
Delivery time : 1-5 days.
POM
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.
PTFE
PTFE offers ultra-low friction, strong chemical resistance, and excellent insulation, ideal for seals, gaskets, and bushings.
Color : White, natural, black, filled or custom-colored.
Types : Virgin PTFE，Glass-filled PTFE，Carbon-filled PTFE，Bronze-filled PTFE，Modified PTFE
Surface finish : Machining finish, polishing, texturing, coating, engraving, anti-static treatment.
Delivery time : 1-5 days.
PMMA
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.
PC
High-performance thermoplastic with excellent toughness, rigidity, and insulation—lightweight and ideal for CNC-machined electronic components.
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.
FR4
FR4 is a glass-fiber epoxy laminate with high strength, excellent insulation, and stable performance. It’s widely used for structural and insulating parts like spacers, brackets, and mounting plates.
Color : Yellow, green, black, white, natural
Types : Standard FR4 / High-Tg FR4 / Halogen-free FR4
Surface finish : Machining finish, polishing, sandblasting, coating, painting, laser marking
Delivery time : 1–5 days
PA
Color : Colored.
Types : PA6, PA66, PA6T, PA9T.
Surface finish :Mechanical grinding, acid/alkali etching, hydrolysis technology, coating.
Delivery time : 1-5 days.
PE
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 is a high-strength, high-temperature engineering plastic with low friction and excellent chemical resistance. It is widely used in aerospace components, high-heat parts, and medical devices.
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 is a semi-crystalline thermoplastic with good flow, requiring temperature control during CNC machining. It’s widely used for containers, connectors, and structural parts.
Color : black,white,colored.
Types : PP-H, PP-B, PP-R, HIPP.
Surface finish :Polishing, Sandblasting, Coating.
Delivery time : 1-5 days.
HDPE
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 rubber-modified thermoplastic with high impact resistance, easy processing, and low cost. It is widely used in housings, packaging, automotive interiors, and lightweight structural applications.
Color : black.
Types : Impact-resistant HIPS, Brominated flame-retardant HIPS, Glass-fiber reinforced HIPS.
Surface finish :Polishing ，Sandblasting ，Coating.
Delivery time : 1-5 days.
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 projects
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 ±0.002 inch.
The following are examples of machining projects we have recently completed.
Glass-filled PTFE precision parts
Material: glass fiber+PTFE
Volume: 1,000 PCs
Finish: Polishing
Challenges:
The part features four cylinders with varying diameters and requires drilling, with PTFE ends needing a roundness tolerance of 0.005”. Fiberglass material is prone to burrs and edge breakage during machining.
Our solution:
High-speed machining with low feed rates and diamond tools enhances efficiency and precision. Combined milling and turning reduce setup errors and help achieve target tolerances.
316 SS cnc machined splined coupling
Material: 316 stainless steel
Volume: 600 PCs
Finish: Passivation
Challenges:
The internal spline structure of this part is complex, with a tolerance requirement of ±0.01mm. 316 stainless steel has high hardness, is prone to sticking to tools, and exhibits significant work hardening.
Our solution:
Using a mill-turn compound with PCD cutting tools, medium speed, stable feed, and layered turning, the internal splines are machined using a milling cutter.
Bronze Internal Spline Threaded Bushing
Material: Bronze
Volume: 500 PCs
Finish: Nickel plating
Challenges:
Bronze tends to stick and form burrs during cutting; small-hole spline machining limits tool access, and low rigidity affects accuracy.
Our solution:
Using sharp PCD or highly polished carbide tools, combined with medium-high spindle speed and stable feed rates, effectively reduces burrs and ensures spline accuracy.
Advantage of cnc turn-mill compound machining
Enhanced Precision and Quality: Single-setup machining minimizes positioning errors and improves overall accuracy.
Boosting Production Efficiency: One setup replaces multiple transfers, reducing cycle time and cost.
Enhanced Process Flexibility: Easily handles complex geometries through optimized programming and tooling.
Optimized Surface Quality: Adaptive machining methods ensure high-quality surface finishes for demanding parts.
Application of turn-mill compound part
Aerospace: Enables high-precision machining of complex, high-performance components for reliable operation.
Automotive Manufacturing: Ensures accuracy and efficiency in producing critical drivetrain and engine parts.
Medical Devices: Delivers high-precision, high-quality machining for small, complex, and biocompatible components.
Mold Manufacturing: Achieves fast, accurate machining of complex molds 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.
