Specifiable Dimensional Tolerances

Dimensional Tolerances

When uploading 3D CAD data, you can specify any dimensions/tolerances for parts where dimensions and tolerances are not displayed.

The minimum specifiable value ranges for tolerances depends on the combination of shape elements.

Depending on other settings, in-range precision may not be covered by the service.

Shape Elements and Minimum Value Ranges for Tolerances

[mm]

Iron, Pre-Hardened Steel, SUS, Aluminum
Shape Element ①/Shape Element ② Blank Surface Pockets Precision Holes/Other Hole Types Precision Slotted Holes Straight Holes (No Precision) Tapped Holes/Countersunk Holes/Slotted Holes
Blank Surface *1 0.1 0.04 0.04 0.04 0.2
Pockets *2
Precision Holes/Other Hole Types
Precision Slotted Holes
Straight Holes (No Precision) Tapped Holes/Countersunk Holes/Slotted Holes

*If the range is less than 0.2, trivalent chromate (white) is not available as a surface treatment via the service.

[mm]

Resin
Shape Element ①/Shape Element ② Blank Surface Pockets Precision Holes/Other Hole Types Precision Slotted Holes Straight Holes (No Precision) Tapped Holes/Countersunk Holes/Slotted Holes
Blank Surface *1 0.1 0.1 0.1 0.1 0.2
Pockets *2
Precision Holes/Other Hole Types
Precision Slotted Holes
Straight Holes (No Precision) Tapped Holes/Countersunk Holes/Slotted Holes
*1 Blank Surface: The entire surface used for external dimensions.
*1 Blank Surface
*2 Pocket: A cutting surface other than a blank surface.
*2 Pocket

Adding Dimensional Tolerances to Grouped Holes

The cutting service will not recognize that dimensions have been entered

even when other features exist in a straight line from features with dimensional tolerances (holes, pockets, etc.)

(Not judged as duplicate dimensions.)

Always insert the tolerance in locations where the tolerance is required.

For example, if you specify a dimensional tolerance for H-001, dimensional tolerances will also be applied to H-002, which is on the same axis and in the same group.

If you want to specify different dimension tolerances for H-001 and H-002, you first need to split the group.

*Note that the above rule does not apply if you specify a dimensional tolerance between holes.

Important Points when Specifying Dimensional Tolerances for Precision Holes

As mentioned above under “Dimensional Tolerance,” when specifying dimensional tolerance for a precision hole, the minimum tolerance value (range) is generally 0.04.

However, there is an exception where the minimum tolerance value (range) is 0.2.

*The orange area is the effective depth range of a precision hole.

0-Step/1-Step Holes (Counterbored Holes), Blind
0-Step/1-Step hole (counterbored hole), blind
0-Step/1-Step hole (counterbored hole), blind
0-Step/1-Step hole (counterbored hole), blind
⇒ Minimum tolerance value (range): 0.04
0-Step Holes, Through
0-Step hole, through
Dimensional tolerance specification on the effective depth side ⇒ minimum tolerance value (range): 0.04
0-Step hole, through
Dimensional tolerance specification on the effective depth side and opposite side ⇒ minimum tolerance value (range): 0.2
0-Step hole, through
0-Step hole, through
Dimensional tolerance specification on effective depth full-length holes ⇒ minimum tolerance value (range): 0.04
1-Step Holes (Counterbored), Through
1-Step hole (counterbored), through 1-Step hole (counterbored), through
1-Step hole (counterbored), through 1-Step hole (counterbored), through
Dimensional tolerance specification on the upper side ⇒ minimum tolerance value (range): 0.04
1-Step hole (counterbored), through
If the lower step is the total length of the effective depth, lower step side dimensional tolerance specification ⇒ minimum tolerance value (range): 0.04
1-Step hole (counterbored), through
If the lower step is not the total length of the effective depth, lower step side dimensional tolerance specification ⇒ minimum tolerance value (range): 0.2
2-Step Holes
2-Step hole 2-Step hole
2-Step hole 2-Step hole
Dimensional tolerance specification on the side of the step with a set effective depth ⇒ minimum tolerance value (range): 0.04
2-Step hole 2-Step hole
Dimensional tolerance specification on the central step effective depth and opposite side ⇒ minimum tolerance value (range): 0.04
2-Step hole 2-Step hole
Dimensional tolerance specification on the central step effective depth and opposite side ⇒ minimum tolerance value (range): 0.04
2-Step hole
Dimensional tolerance specification on the central step effective depth and opposite side ⇒ minimum tolerance value (range): 0.2
2-Step hole
Dimensional tolerance specification on steps with set effective depth and opposite side ⇒ minimum tolerance value (range): 0.2