Precision Manufacturing Tolerances for High-Performance Industries

At Yueyi Precision, tolerance is more than a number on a drawing — it’s a controlled, repeatable manufacturing capability. We specialize in precision machining tolerances for complex components where dimensional accuracy directly affects performance, reliability, and safety.

Our engineering and quality teams work together to ensure every part meets strict CNC machining tolerances, whether for micron-level medical components, high-consistency automotive parts, or critical assemblies in advanced equipment. From prototype runs to high-volume production, we maintain stable processes that support tight tolerance machining across a wide range of materials and geometries.

With advanced inspection systems, statistical process control, and certified quality management standards, we deliver high precision machining results you can trust — not just on the first part, but across every batch.

Our Standard Machining Tolerances at a Glance

To make tolerances easier to scan, we group them into three capability levels. Exact results vary by part geometry, material, datum strategy, and inspection method.

Standard Precision High-Precision
Manufacturing Process Capability (Scan View) Best For Reference
CNC Milling Standard Precision High-Precision Flatness-critical faces, pockets, housings Complex geometries, sealing lands, alignment faces ISO 2768-M
CNC Turning Standard Precision High-Precision Concentricity, roundness-sensitive features Shafts, bushings, bearing seats ISO 2768-F
5-Axis Machining Standard Precision High-Precision Reduced re-clamping error, multi-face datums Multi-side parts, complex angles ISO 2768-M to F
Swiss Machining Standard Precision High-Precision Small diameter, long/slender components Micro parts, pins, precision inserts ISO 2768-F
Manufacturing Process Capability (Scan View) Best For Reference
Sheet Metal Laser Cutting Standard Precision Panels, cutouts, enclosure profiles Enclosures, chassis panels ISO 2768-M
Sheet Metal Bending Standard Precision Angles vary by material & bend radius Brackets, formed housings ISO 2768-M
Die Casting (Post-Machined) Standard High-Precision* *Critical surfaces CNC finished Complex aluminum housings ISO 8062 CT6–CT8
Aluminum Extrusion (Machined) Standard Precision Tight features achieved via CNC Frames, rails, profiles EN 755-9

CNC PRECISION

Micron-level stability for complex rotational components in medical & aerospace

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Comprehensive Tolerance Specifications:
Linear & Geometric Dimensioning

At Yueyi Precision, we define and control manufacturing tolerances based on real production capability — not just theoretical design limits. Our team supports both linear tolerances and geometric tolerances to ensure every component performs reliably in assembly, motion, and sealing applications.

Linear tolerances in CNC machining control the size, distance, and location of features — including hole diameters, shaft diameters, lengths, wall thicknesses, and pocket depths. These tolerances answer critical engineering questions such as “How big?” and “Where exactly?” — directly affecting part fit and functional alignment.

Geometric tolerances (GD&T) focus on the form, orientation, and positional accuracy of features. Flatness, straightness, roundness, cylindricity, and positional control ensure parts not only meet dimensional targets but also maintain functional performance under real-world loads and assembly conditions.

The tolerance capability matrix below reflects our standard and precision CNC machining tolerances, categorized by part size and inspection method. This allows engineers and buyers to quickly evaluate what level of precision machining tolerance is achievable in production.

Feature / Characteristic Small Medium Large Recommended Measurement
Hole Diameters ±0.01 mm ±0.02 mm ±0.03 mm Bore Gauges, CMM
Shaft Diameters ±0.005 mm ±0.01 mm ±0.015 mm Micrometers, CMM
Length / Distance ±0.02 mm ±0.03 mm ±0.05 mm Calipers, Height Gauges
Wall Thickness ±0.05 mm ±0.10 mm ±0.15 mm Ultrasonic, CMM
Pocket Depth ±0.01 mm ±0.02 mm ±0.03 mm Depth Micrometer, CMM
Values shown are typical guidelines. Actual tolerance depends on material, geometry, datum strategy, and inspection method.

Tolerance Capability by Production Volume

Scaling Precision with Your Production Needs
At Yueyi precision, we understand that tolerance requirements and quality control methods must adapt to your production volume. Whether you need a single prototype or mass production of thousands, our processes are optimized to deliver the right balance of precision, cost, and speed for each production scenario.

Volume-Based Tolerance Capabilities Overview

Volume-Based Tolerance Capabilities Overview

Production Volume Typical Tolerance Range Recommended Tolerance Class Quality Control Method Lead Time Impact Best For
Prototype & R&D(1-10 pieces) ±0.01 - 0.02 mm±0.0004" - 0.0008" ISO 2768-f (Fine) 100% InspectionFirst Article Report Standard + 1-2 days Design validationFunctional testingMarket samples
Low Volume Production(10-100 pieces) ±0.015 - 0.03 mm±0.0006" - 0.0012" ISO 2768-f to m First Piece + 20-30% Random Sampling Standard Pilot runsClinical trialsLimited editions
Medium Volume(100-1,000 pieces) ±0.02 - 0.05 mm±0.0008" - 0.0020" ISO 2768-m (Medium) Statistical Process Control (SPC)Periodic capability studies Standard Early productionMarket launchSeasonal products
High Volume(1,000-10,000 pieces) ±0.03 - 0.08 mm±0.0012" - 0.0031" ISO 2768-m SPC with Cp/Cpk ≥ 1.33Automated in-process checks Optimized for volume Established productsComponent manufacturingAssembly line supply
Mass Production(10,000+ pieces) ±0.05 - 0.1 mm±0.0020" - 0.0040" ISO 2768-m to c (Coarse) Automated inspection systemsSPC with Cp/Cpk ≥ 1.67 Minimum (dedicated lines) Consumer goodsAutomotive componentsElectronics manufacturing

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NO.22,You Yi Road ,Wulian Community, LongCheng Street ,Long gang District ,Shen Zhen

Email

icey@yueyiprecision.com