Default General Tolerance Standards

The cutting service does not display dimensions or tolerances when 3D CAD data is uploaded other than external dimensions and hole information, assuming that the customer specifies tolerances of their choice.

This section describes the finish of parts where dimensions and tolerances are not displayed.

Default General Tolerance Standards for Machined Dimensions (From Excerpts of JIS B 0405:1991/JIS B 0419:1991)

The following standards are applied to the origin according to machining standards.

The origin can be moved to any position.

Length, Excluding Chamfer, Dimensional Tolerances



Tolerance Grade Base Dimensions
Symbol Description ≥0.5 ≤3 >3 ≤6 >6 ≤30 >30 ≤120 >120 ≤400 >400 ≤1000
m Medium ±0.1 ±0.1 ±0.2 ±0.3 ±0.5 ±0.8
Tolerances for Chamfer Length Dimensions (Corner Radius or Corner Chamfer Dimensions)



Tolerance Grade Base Dimensions
Symbol Description ≥0.5 ≤3 >3 ≤6 >6
C Rough ±0.4 ±1 ±2
Angle Dimensional Tolerances



Tolerance Grade Length of the Shorter Angle Edge
Symbol Description ≤10 >10 ≤50 >50 ≤120 >120 ≤400 >400
m Medium ±1° ±30′ ±20′ ±10′ ±5′
General Tolerances of Perpendicularity



Tolerance Grade Nominal Length of the Shorter Edge
Symbol ≤100 >100 ≤300 >300 ≤1,000
K 0.4 0.6 0.8
General Tolerances of Straightness and Flatness



Tolerance Grade Nominal Length
Symbol ≤10 >10 ≤30 >30 ≤100 >100 ≤300 >300 ≤1,000
K 0.05 0.1 0.2 0.4 0.6

(Related) Changing a design’s origin.

Resin Precision Assurance

Unlike metal, resin is a material that easily changes shape or dimensions due to factors such as temperature and humidity. Due to this, precision assurance is performed under the following conditions:
· Inspections are performed in temperature-controlled environments.
· Precision assurance is based on the results of inspections performed immediately before shipment.

Surface Roughness

The surface roughness reference value is √Ra6.3 (√Rz25).

The surface roughness is displayed in the lower left corner of the 3D viewer and the roughness symbol can be changed in user settings.

Internal and External Corners

For external sharp corners or corners of C0.5 and smaller, the finish will be as follows:
· Corners C0.1 mm to 0.5 mm or less


For internal sharp corners, the finish will be as follows:
· Internal corners R0.1 to R0.5 mm or less