ZHD Precision implements standardized dimensional tolerance control for CNC machining, turning, milling and precision mechanical parts. It delivers consistent batch repeatability, ultra-tight precision and full-dimension inspection to meet high-standard requirements for automotive, semiconductor, medical and industrial equipment industries.
Tolerance is the core benchmark of precision manufacturing quality. ZHD Precision establishes a unified, factory-wide tolerance standard system covering prototype machining, small-batch trial production and mass production. All processes strictly follow ISO 2768 general tolerance standards and industrial customized precision specifications. We stabilize dimensional accuracy, geometric tolerance, assembly clearance and surface flatness across all batches, ensuring interchangeability, assembly consistency and long-term operational stability of custom mechanical parts.
This page serves as the official technical specification reference for all custom projects, including conventional standard tolerance, mechanical geometric tolerance, material tolerance deviation and ultra-precision customized tolerance.
All conventional parts adopt unified ISO 2768-mk standard by default unless clients specify customized tolerance requirements.
Standard dimensional tolerance: ±0.02mm. Ultra-precision customized tolerance ranges from ±0.005mm to ±0.01mm. It controls flatness within ≤0.01mm per 100mm, parallelism and verticality within ±0.015mm, and positioning hole tolerance within ±0.01mm.
Standard turning tolerance reaches ±0.015mm, and ultra-precision shaft tolerance can achieve ±0.005mm. It controls roundness and concentricity within ≤0.008mm, ensuring stable surface consistency for all rotary precision components.
It achieves ±0.005mm tolerance for micro pins and slender shafts, realizing ultra-high concentricity control for miniature precision parts. This process perfectly matches tiny critical component demands for semiconductor and medical equipment.
It maintains ±0.01mm precision for fine slits and complex special-shaped cavities. It delivers zero-burr finishing for hard alloy components that cannot be processed by conventional cutting methods.
ZHD Precision strictly controls full-range geometric tolerance to ensure assembly accuracy and mechanical movement stability.
| Control | Tolerance |
|---|---|
| Flatness | 0.01mm–0.02mm (precision grade) |
| Parallelism | ≤0.015mm |
| Verticality | ≤0.015mm |
| Roundness | ≤0.008mm |
| Concentricity | ≤0.008mm |
| Position Tolerance | ±0.01mm for precision hole groups |
Control
Flatness
Tolerance
0.01mm–0.02mm (precision grade)
Control
Parallelism
Tolerance
≤0.015mm
Control
Verticality
Tolerance
≤0.015mm
Control
Roundness
Tolerance
≤0.008mm
Control
Concentricity
Tolerance
≤0.008mm
Control
Position Tolerance
Tolerance
±0.01mm for precision hole groups
Different materials feature unique cutting stability and shrinkage characteristics. The team adopts differentiated tolerance compensation strategies to ensure stable and consistent precision output for all custom parts.
| Material | Standard Tolerance | Ultra-Precision Limit | Tolerance Features |
|---|---|---|---|
| Aluminum Alloy | ±0.02mm | ±0.005mm | Good cutting stability, suitable for ultra-precision surface and hole positioning |
| Steel / Stainless Steel | ±0.02mm | ±0.008mm | High hardness, stable dimension, excellent batch repeatability |
| Titanium Alloy | ±0.02mm | ±0.008mm | High-temperature resistant, stable precision for extreme working conditions |
| PA / Nylon | ±0.1mm | ±0.05mm | Thermal shrinkage compensation required |
| PMMA / PC | ±0.08mm | ±0.04mm | Anti-deformation processing for transparent precision parts |
| Silicone Rubber | ±0.15mm | ±0.08mm | Flexible material tolerance adaptation |
Material
Aluminum Alloy
Standard Tolerance
±0.02mm
Ultra-Precision Limit
±0.005mm
Tolerance Features
Good cutting stability, suitable for ultra-precision surface and hole positioning
Material
Steel / Stainless Steel
Standard Tolerance
±0.02mm
Ultra-Precision Limit
±0.008mm
Tolerance Features
High hardness, stable dimension, excellent batch repeatability
Material
Titanium Alloy
Standard Tolerance
±0.02mm
Ultra-Precision Limit
±0.008mm
Tolerance Features
High-temperature resistant, stable precision for extreme working conditions
Material
PA / Nylon
Standard Tolerance
±0.1mm
Ultra-Precision Limit
±0.05mm
Tolerance Features
Thermal shrinkage compensation required
Material
PMMA / PC
Standard Tolerance
±0.08mm
Ultra-Precision Limit
±0.04mm
Tolerance Features
Anti-deformation processing for transparent precision parts
Material
Silicone Rubber
Standard Tolerance
±0.15mm
Ultra-Precision Limit
±0.08mm
Tolerance Features
Flexible material tolerance adaptation
The company formulates exclusive industry-level tolerance control specifications for high-precision fields, fully complying with strict industrial validation and batch consistency requirements.
Realizes consistent batch tolerance repeatability. Key powertrain, chassis and safety parts strictly maintain ±0.01mm stable tolerance, supporting APQP and PPAP full-process quality traceability.
Micro-component tolerance controlled within ±0.005mm. Zero-burr, ultra-clean and high-uniformity precision standard, adapting to wafer processing and vacuum equipment assembly requirements.
High-load structural parts maintain stable assembly tolerance. Transmission and rotating parts adopt enhanced geometric tolerance control to ensure long-term mechanical operation stability.
Precision instrument parts achieve ultra-stable dimensional consistency, meeting medical device assembly safety and high-reliability standards.
Complies with ISO 10110 optical standards. It controls ultra-flat surfaces and micro-positioning accuracy within ±0.005mm via low-stress machining, ensuring zero distortion and stable calibration for optical and imaging systems.
Follows strict aerospace-grade precision specifications. It delivers stable micro-dimensional accuracy and consistent batch repeatability for aviation structural and connector parts, adapting to extreme high-altitude and high-temperature operating environments with full quality traceability.
Maintains ultra-tight assembly tolerance for robot joints, transmission parts and positioning fixtures. It precisely controls concentricity and flatness to guarantee smooth operation and high repeated positioning accuracy for automated robotic systems.
Features customized precision standards for power generation and energy storage equipment. It stabilizes dimensional consistency for wind energy, photovoltaic and energy storage components under alternating loads, ensuring long-term durability and environmental adaptability.
ZHD Precision builds a complete closed-loop tolerance control system covering DFM evaluation, formal production and final delivery, effectively eliminating out-of-tolerance risks and ensuring 100% qualified precision parts.
01
Engineers analyze all dimensional tolerance marks on design drawings, optimize unreasonable tolerance parameters, and reserve scientific machining allowance before mass production.
02
It compensates dimensional deviation caused by material shrinkage, tool wear and thermal deformation to stabilize batch dimensional consistency.
03
It monitors critical tolerance dimensions in real time during mass production to prevent batch dimensional deviation and ensure stable output.
04
It adopts CMM, VMM, height gauges and micrometers for full-dimensional inspection, and provides official dimensional inspection reports for all high-precision and batch orders.
05
All tolerance inspection data corresponds to independent production batches, meeting full-process traceability and audit requirements for automotive and high-end industrial projects.
Our default standard follows ISO 2768-mk. General CNC parts tolerance is ±0.02mm, and precision critical dimensions can reach ±0.005mm.
Yes. We support customized ultra-precision tolerance according to client drawings, including ±0.005mm micro tolerance for semiconductor and medical components.
Yes. Plastics and flexible materials have shrinkage and deformation characteristics. We adopt targeted tolerance compensation to ensure final assembly accuracy.
Yes. We provide Precision Dimensional Reports (PDR), FAI reports and full inspection data for all high-precision and industrial batch orders.
Absolutely. Our engineers provide free DFM tolerance optimization suggestions to avoid over-tolerance difficulty and reduce production cost while ensuring assembly performance.
Yes. We implement fixture positioning, tool parameter locking and real-time dimension monitoring to ensure batch tolerance repeatability and interchangeability.
Submit your design drawings to acquire professional DFM tolerance evaluation, ultra-precision customization solutions and accurate quotations. ZHD Precision stabilizes every dimensional detail for your high-end precision manufacturing projects.
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