BaiChuan Tolerance and Standard

CNC milling and turning tolerance standard

Our commitment is to your specifications, offering meticulous craftsmanship even when detailed 2D drawings are absent. Instead, specifications can be communicated using the ISO 2678 standard for clear, concise expectations.

Specifications

CNC Milling

CNC turning

Maximum Part Size

6500×4200×1800mm

255.9×165.4×70.9 in.

1600*1400mm

63*55.2 in.

Minimum Part Size

4×4 mm

0.1×0.1 in.

2×2 mm

0.079×0.079 in.

Feature Precision

0.50 mm

0.00197 in.

Φ 0.50 mm

Φ 0.00197 in.

Standard Tolerances

+/- 0.05 mm

+/- 0.002 in.

+/- 0.05 mm

+/- 0.002 in.

Hole Diameters & Shaft Diameters

+/- 0.025 mm

+/- 0.001 in.

+/- 0.025 mm

+/- 0.001 in.

Edge Condition

Every sharp corner is meticulously rounded off, ensuring safety and precision. The specifics of chamfering or radiusing are detailed as per your drawing requirements.

Threads & Tapped Holes

we handle diameters from Φ 1.5-5 mm with depths up to 3×diameter and beyond Φ 5 mm with depths ranging from 4-6×diameter.

Text Detailing

minimum text width of 0.5 mm and depth of 0.1 mm.

precise laser marking is used to achieve detailed text specifications on turned parts.

ISO:2768 Linear dimensional tolerances without special tolerance indications

Size Range

Fine(mm)

Medium(mm)

Coarse(mm)

Very Coarse(mm)

0.5 up to 3

+-0.05

+-0.1

+-0.2

Over 3 up to 6

+-0.05

+-0.1

+-0.3

+-0.5

Over 6 up to 30

+-0.1

+-0.2

+-0.5

+-1.0

Over 30 up to 120

+-0.15

+-0.3

+-0.8

+-1.5

Over 120 up to 400

+-0.2

+-0.5

+-1.2

+-2.5

Over 400 up to 1000

+-0.3

+-0.8

+-2.0

+-4

Over 1000 up to 2000

+-0.5

+-1.2

+-3.0

+-6

Over 2000 up to 4000

+-2.0

+-4.0

+-8

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We will strictly follow the drawing requirements or ISO requirements to ensure product accuracy.

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