CNC Turned Precision parts are reliable when your project needs tight specs and accurate results every time. We at Shenzhen Ruiyihang Technology are experts in custom precision turning, and we've been in the engineering business for over 15 years. Our building has 15 CNC turning centers that can hold tolerances of 0.02 mm and have a surface roughness of Ra 1.6. We've been helping clients around the world with 100% custom OEM/ODM solutions since 2008, from the first sample to mass production. By letting engineers talk directly to customers, we can make sure that your ideas are easy to make and cut wait times for simple parts to as little as three days.
Precision CNC turning takes raw metal and turns it into intricately shaped parts. Our product production, on the other hand, focuses on accuracy at the nano level.
These things help your parts:
We work with industrial plastics, aluminium, brass, stainless steel, and brass. Before cutting starts, an analyser checks each material to make sure it is correct.
Our approach for using carbide tools provides stable dimensions. To keep things accurate, threading, knurling, and finishing are all done in the same setting.

Advanced Equipment
Materials We Process
Surface Treatments
We follow a three-stage inspection system:
Incoming Material Inspection
Every batch gets certified material reports. Our spectrometer confirms alloy composition before machining.
In-Process Quality Control
Operators use precision gauges to verify dimensions during production. This catches deviations before they become problems.
Final CMM Testing
Coordinate measuring machines validate critical features. You receive inspection reports with every shipment.
Our ISO 9001 certified system ensures traceability from raw material to finished part.

| Item | Description |
|---|---|
| Material | Stainless Steel 304 (other alloys available) |
| Process | CNC Turning / Precision Lathe Machining |
| Surface Finish | As-machined, Ra 1.6 typical |
| Typical Size Range | Ø2 mm – Ø300 mm |
| Standard Tolerance | ±0.02 mm (tighter available) |
| Surface Roughness | Ra 1.6 (Ra 0.8 achievable) |
| Drawing Format | 2D (PDF/DWG), 3D (STEP/IGS/STP) |
| Production Volume | Prototype to 100,000+ pieces |
| Inspection Method | 100% inspection or sampling per requirements |
| Lead Time | 3–7 days for samples, scalable for production |

Engineering-First Approach
You communicate directly with our engineers—no middlemen. We review your drawings and suggest improvements for:
Speed That Matches Your Timeline
Simple parts ship in 3 days. Standard samples take 7 days. We quote within hours of receiving your drawings.
Flexible Production Scale
Need one prototype? We'll make it. Require 50,000 units monthly? Our capacity scales with your demand.
Problem-Solving Expertise
Difficult geometries don't scare us. We develop custom tooling and fixturing solutions for complex CNC Turned Precision components that others decline.
Transparent After-Sales Support
Quality issues reported within 30 days get remanufactured within one week. We cover shipping costs for defects.

Q: How is precise CNC turning different from ordinary turning?
Precision turning tightens tolerances, improves surface polish, and controls concentricity and roundness. Standard turning can accomplish ±0.1 mm, whereas precision work aims for ±0.01 mm or better. We maintain these standards with enhanced fixturing and real-time monitoring.
Q: What accuracy can you reach?
We generally attain ±0.01 mm tolerances on crucial dimensions, with closer tolerances available based on shape and material Unless your drawing indicates otherwise, we use ISO 2768-medium for reference features and non-critical regions.
Q: How do you keep precision turned components consistent?
Stable machining, tool control, and inspection systems assure batch-to-batch quality. Workers follow work instructions to lock feeds, speeds, and tool offsets. Statistic process control charts detect dimensional drift before parts are affected.
Q: Do you accept small batches?
Absolutely. Our setup efficiency makes low-volume production affordable. Clients often test 10–50 pieces before ramping up.
Q: Do you optimise designs for manufacturing?
Yes. Undercuts, improper draft angles, and tight tolerances are identified by our engineers. You save time and money by having these talks before production.
Ready to discuss your project with CNC Turned Precision? Send your drawings to bill@bldmachining.com and receive a detailed quote with engineering feedback within 24 hours.