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	–	0.04
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 (clear) 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	–	0.1
Precision Holes/Other Hole Types		–
Precision Slotted Holes			–
Straight Holes (No Precision) Tapped Holes/Countersunk Holes/Slotted Holes			–	–

[mm]

Polished flat bar (EN 1.0038 equiv.(flat bar), EN 1.1191 equiv.(flat bar), EN 1.4301 equiv.(flat bar), EN AW-6063 equiv.(flat bar))
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	0.2	0.2	0.2	0.2	0.2
Pockets *2	ー	0.2
Precision Holes/Other Hole Types		ー
Precision Slotted Holes			ー
Straight Holes (No Precision) Tapped Holes/Countersunk Holes/Slotted Holes			ー	ー

*1 Blank Surface: The entire surface used for external dimensions.

*2 Pocket: A cutting surface other than a blank surface.

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

⇒ Minimum tolerance value (range): 0.04

0-Step Holes, Through

Dimensional tolerance specification on the effective depth side ⇒ minimum tolerance value (range): 0.04

Dimensional tolerance specification on the effective depth side and opposite side ⇒ minimum tolerance value (range): 0.2

Dimensional tolerance specification on effective depth full-length holes ⇒ minimum tolerance value (range): 0.04

1-Step Holes (Counterbored), Through

Dimensional tolerance specification on the upper side ⇒ minimum tolerance value (range): 0.04

If the lower step is the total length of the effective depth, lower step side dimensional tolerance specification ⇒ minimum tolerance value (range): 0.04

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

Dimensional tolerance specification on the side of the step with a set effective depth ⇒ minimum tolerance value (range): 0.04

Dimensional tolerance specification on the central step effective depth and opposite side ⇒ minimum tolerance value (range): 0.04

Dimensional tolerance specification on the central step effective depth and opposite side ⇒ minimum tolerance value (range): 0.2

Dimensional tolerance specification on steps with set effective depth and opposite side ⇒ minimum tolerance value (range): 0.2