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Tolerances and Standards

CNC Machining Tolerances

Standard Tolerance

General machining tolerance for non-critical dimensions, suitable for most commercial parts.

Tolerance

±0.125mm (0.005")

Fine Tolerance

Achievable with standard tooling and careful setup, ideal for precision components.

Tolerance

±0.025mm (0.001")

Super Fine Tolerance

Requires specialized tooling and fixturing, for critical aerospace and medical parts.

Tolerance

±0.005mm (0.0002")

Linear Dimension

Standard linear dimension tolerance for machined features up to 500mm.

Tolerance

±0.050mm

H

Hole Diameter

Drilled and reamed hole tolerance with standard tooling.

Tolerance

±0.025mm

S

Surface Finish (Ra)

Standard machined surface finish without secondary operations.

Tolerance

0.8-3.2 μm

T

Thread Tolerance

Standard thread tolerance for tapped holes and external threads.

Tolerance

Class 6H / 6g

F

Flatness

Flatness tolerance for milled surfaces within 100mm x 100mm area.

Tolerance

±0.020mm

3D Printing Tolerances

SLS Nylon Standard

Selective Laser Sintering tolerance for general-purpose nylon parts.

Tolerance

±0.3mm (0.012")

SLA Resin Fine

Stereolithography tolerance for high-detail resin prototypes.

Tolerance

±0.1mm (0.004")

F

FDM Standard

Fused Deposition Modeling tolerance for PLA/ABS prototype parts.

Tolerance

±0.5mm (0.02")

M

MJF Nylon

Multi Jet Fusion tolerance for production-grade nylon parts.

Tolerance

±0.2mm (0.008")

Metal DMLS

Direct Metal Laser Sintering tolerance for metal 3D printed parts.

Tolerance

±0.1mm (0.004")

L

Layer Thickness

Minimum layer thickness achievable across different technologies.

Tolerance

0.05-0.3mm

Injection Molding Tolerances

Commercial Tolerance

Standard commercial molding tolerance suitable for consumer products.

Tolerance

±0.25mm (0.01")

Fine Tolerance

Precision molding tolerance with optimized tool design and process.

Tolerance

±0.05mm (0.002")

S

Shrinkage Allowance

Typical shrinkage compensation for common thermoplastics.

Tolerance

0.2-2.5%

P

Parting Line Tolerance

Flash and parting line tolerance for standard injection molds.

Tolerance

±0.10mm

D

Draft Angle

Recommended draft angle for easy part ejection.

Tolerance

0.5°-3°

W

Wall Thickness

Minimum and recommended wall thickness for injection molded parts.

Tolerance

1.0-3.0mm

Sheet Metal Tolerances

Linear Dimension

Standard tolerance for linear dimensions on sheet metal parts.

Tolerance

±0.20mm

B

Bend Angle

Typical bend angle tolerance for press brake forming.

Tolerance

±1.0°

B

Bend to Edge

Tolerance from bend line to part edge after forming.

Tolerance

±0.25mm

H

Hole to Edge

Minimum distance and tolerance from hole center to part edge.

Tolerance

±0.15mm

F

Flatness

Flatness tolerance for sheet metal parts within 500mm x 500mm.

Tolerance

±0.50mm

K

K-Factor

Standard K-factor for bend allowance calculations in sheet metal.

Tolerance

0.35-0.50

Tolerances Resources

Getting Started Guide

Everything you need to know about tolerances - best practices, tips, and workflows.

Industry Applications

Real-world examples of how tolerances solutions are applied across industries.

Technical Specifications

Detailed technical data and specifications for tolerances processes and materials.

Cost Optimization

Tips and strategies to optimize costs while maintaining quality for your projects.

Quality Standards

ISO 9001:2015 certified processes and rigorous quality control procedures.

Case Studies

See how companies use our services to solve challenges and speed up development.

Design Resources

Practical design tips to improve manufacturability and reduce production costs.

Expert Support

Get help from our engineering team for material selection and design optimization.

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