CNC TURNING SERVICES FOR PRECISION ROUND PARTS
CNC Turning Services
High-tolerance shafts, bushings, couplings & custom turned components from 20,000+ vetted suppliers.
What is CNC Turning?
CNC Turning is the fastest way to manufacture precise round parts with perfect concentricity.
Rotating Workpiece
The raw bar spins at speed while cutting tools shape it.
Ideal for Cylinders
Perfect for shafts, bushings, couplings, and threaded rods.
Tight Tolerances
Consistent accuracy up to ±0.01 mm on critical dimensions.
High Efficiency
Great for prototypes and high-volume production runs.
Processes & Capabilities in CNC Turning
Our CNC turning services cover a wide range of operations, helping you achieve precise components across industries.
Facing & Boring
Flat surfaces and precision internal bores with high repeatability.
Grooving & Parting
Accurate external and internal grooves, and clean separation of parts.
Thread Cutting
Metric, UNC/UNF, or custom threads produced with tight tolerance.
Multi-Axis Turning
2-axis to Swiss-type turning centers for complex geometries.
Micro Turning
Miniature precision parts for electronics, medical, and aerospace.
CNC Turning Capabilities
| Feature | Capability |
|---|---|
| Diameter Range | Ø 2 – 300 mm |
| Max Length | Up to 800 mm |
| Tolerances | ±0.01 mm (standard ±0.05 mm) |
| Threads | Metric & UN, Internal & External |
| Operations | Facing, Grooving, Knurling, Drilling, Tapping |
| Production | Prototype → Mass Production |
Materials for CNC Turning
Steel
EN8, EN19, 4140, SS304, SS316
Aluminum
6061, 6082, 7075
Brass & Copper
High machinability alloys
Engineering Plastics
POM (Delrin), Nylon, PTFE
Industries We Serve with CNC Turning
Our CNC turning expertise supports critical applications across multiple industries, from small prototypes to high-volume production.
Automotive
Shafts, housings, couplings, and custom fasteners for OEMs and Tier-1 suppliers.
Aerospace
High-strength bushings, landing gear sleeves, and lightweight precision parts.
Medical
Surgical tools, orthopedic implants, and precision components for healthcare equipment.
Oil & Gas
Fittings, pipe connectors, and corrosion-resistant turned components.
General Engineering
Custom components for machinery, industrial automation, and fabrication projects.
Surface Finishes for CNC Turned Parts
| Finish | Typical Roughness (Ra) | Notes |
|---|---|---|
| As-Turned | ~1.6–3.2 μm | Fastest; tool marks visible |
| Bead Blast | ~2.0–3.5 μm | Uniform matte aesthetic |
| Anodize / Hard Anodize | Base surface | Corrosion / wear resistance |
| Passivation (SS) | Base surface | Improves corrosion only |
| Black Oxide / Zn-Ni / ENP | Base surface | Cosmetic + mild protection |
Tip: Specify target Ra and coating thickness in your RFQ to avoid rework.
Tolerances & GD&T for CNC Turned Parts
Use practical bands for cost–performance. Tighten only where function demands.
| Feature | Good Practice (GD&T) | When to Escalate |
|---|---|---|
| Shaft Ø / Bore Ø | Size tol as needed; add ROUNDNESS | Grinding for fits below ±0.01 mm |
| Concentric surfaces | CONCENTRICITY or RUNOUT to a datum | Honing / grind if ≤0.01 mm TIR |
| Threaded ends | Standard class (Metric/UN); add reliefs | Gauging + roll threading for cosmetic/strength |
Tip: Specify the functional datum scheme on the drawing to avoid over-tight tolerances on non-critical faces.
Quality & Inspection
Layered QC for CNC Turning components — from incoming raw material to final dispatch, with documentation on request.
| Stage | What we check | Typical Instruments |
|---|---|---|
| Incoming RM | Grade, certs, hardness (if needed) | Spectro/Certs, Hardness tester |
| FAI | Key Ø/ID, length, threads, runout | Vernier, Micrometer, Bore gauge, Thread ring/plug |
| In-Process | Critical-to-quality dims, SPC checks | Go/No-Go, Height gauge, Surface tester |
| Final | Full spec, finish, packing | Complete gauges; CMM on request |
CNC Turning Components
Typical CNC turning components we supply — optimized for concentricity, surface finish, and cost.
Shafts
Precision Ø control, runout to ≤0.03 mm; optional grinding for ultra-tight fits.
Bushings / Sleeves
Tight ID/OD tolerance bands; chamfers & reliefs for easy assembly.
Couplings
Internal/External threads (Metric/UN), keyways, and reliefs as per drawing.
Threaded Rods / Studs
Rolled or cut threads by requirement; verified with ring/plug gauges.
Spacers / Rings
Flatness and parallelism controlled; deburred for safe handling.
Pulleys / Adapters
Concentric bores, grooves; balance checks on request.
Industries & Applications
Where our CNC Turning components are commonly used.
Automotive
- Shafts, spacers, sleeves, pins
- Materials: EN8/EN19, SS304/316, 6061
- Finishes: Black oxide, zinc–nickel
Hydraulics / Pneumatics
- Fittings, adapters, glands
- Materials: 4140, SS316, Brass
- Finishes: ENP, passivation
Robotics
- Couplings, bushings, precision spacers
- Materials: 6082/7075, POM/Delrin
- Finishes: Anodize, bead blast
Energy
- Threaded rods, collars, adapters
- Materials: SS316, 4140
- Finishes: Nitriding, black oxide
Aerospace Fixtures
- Location pins, sleeves, pulleys
- Materials: 7075, SS304
- Finishes: Hard anodize, passivation
Medical Tooling
- Non-implant instruments, spacers
- Materials: SS316, POM
- Finishes: Passivation
DFM for Turning
Use these quick rules to reduce cost and lead time while maintaining function.
| Feature | Recommended | Notes |
|---|---|---|
| Min wall (metals) | ≥ 1.5–2.0 mm | Plastics: 2.0–2.5 mm |
| Internal fillet radius | ≥ 0.5 mm | 0.8–1.0 mm preferred for strength |
| Groove/undercut width | ≥ 2.0 mm | Match standard tool widths |
| Thread relief | Length ≥ 1.5 × pitch | Chamfer thread start 30–45° |
| Slender parts (L/D) | L/D ≤ 6:1 | Use centers/steady rest above this |
| Tolerances | General ±0.05 mm | Tight only where functional; see Tolerances section |
| Datum strategy | Axis as Datum A | Build other datums from clamping faces |
Values are typical guidance; we’ll confirm feasibility during DFM.
Process & Lead Times
Simple, transparent flow from RFQ to delivery.
| Stage | Typical Time | Notes |
|---|---|---|
| DFM + Quotation | 24–48 h | Faster with clear drawings & quantities |
| Samples | 3–7 days | Material & finishing dependent |
| Production | 1–3 weeks | Batch size, complexity, tooling |
| Finishing | 2–5 days | Anodize, passivation, black oxide, etc. |
| Shipping | Domestic 2–5 d • Intl 5–9 d | Express options available |
Need it faster? Share your deadline and we’ll propose an accelerated plan.
Why TheSupplier
Leverage scale, speed, and quality for your CNC Turning components.
20,000+ Vetted Suppliers
Instant access to idle capacity and specialty turning cells worldwide.
Fast Quotes & Lead Times
DFM + pricing in 24–48h; prototype to mass production on one platform.
Strict QC & Documentation
In-process + final inspection; PPAP/COC and CMM reports available on request.
Cost Advantage
Negotiation leverage, multi-quote comparison, and process routing for savings.
End-to-End Support
Material sourcing, machining, finishing, packing, and logistics under one roof.
Pricing Factors & Cost-Down Tips
What drives price for CNC Turning components and how to reduce it without compromising function.
| Adjust | Effect on Cost | Typical Saving |
|---|---|---|
| Relax non-critical tol to ±0.05 mm | Higher throughput, fewer rejects | 5–15% |
| Use standard threads (Metric/UN) + reliefs | Faster tooling, easier gauging | 3–8% |
| Combine ops with live-tooling where possible | Fewer setups/fixtures | 6–12% |
| Increase batch size / reorder point | Amortize setup & tooling | 8–20% |
| Select readily available alloys (e.g., 6061 vs 7075 when acceptable) | Lower raw material and lead time | 5–18% |
| Choose simpler coatings (e.g., black oxide vs Zn–Ni if spec allows) | Shorter finishing time/cost | 4–10% |
Share your drawing and target price — we’ll propose DFM changes for savings.
Related Resources
Explore more about CNC Turning services, capabilities, and insights.
CNC Machining (Parent)
Overview of all machining services offered by TheSupplier.
Go to CNC Machining →Blog / Insights
Tips on DFM, material selection, and coating choices for turned parts.
Read Articles →Upload Your Drawing for CNC Turning
Get pricing with DFM feedback for shafts, bushings, couplings, spacers, and custom CNC Turning components.
CNC Turning Guides & Resources
Short, practical articles to help buyers specify better turned parts, avoid rework, and choose the right machining route.
CNC Machining Tolerances Explained
Standard vs. tight fits, how ±0.01 mm impacts cost, and what to call out on drawings for turned parts.
Read guide →CNC Milling Surface Finish Guide
Ra values, visual charts, and how bead blast, anodize, and plating affect appearance and dimensions.
Read guide →CNC Turning Components & Applications
Shafts, bushings, couplings—runout, grooves, thread notes, and inspection checks that matter.
Read guide →How to Choose the Right CNC Machining Service
When to use turning vs. milling vs. drilling, supplier vetting, and quoting signals to watch.
Read guide →CNC Turning Costly Mistakes
10 common pitfalls in drawings & specs (and quick fixes) that inflate cost or delay deliveries.
Read guide →CNC Turning FAQs
Quick answers about CNC Turning services, tolerances, materials, finishes, and lead times.