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- Accuracy and Machining Specifications
- Specifiable Dimensional Tolerances
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]
| Steel, Pre-Hardened Steel, Stainless steel, 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 | – | ||||
[mm]
|
|||||
|---|---|---|---|---|---|
| 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 | – | ||||
| 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. |
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| *2 Pocket: A cutting surface other than a blank surface. |
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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.
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
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0-Step Holes, Through
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1-Step Holes (Counterbored), Through
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2-Step Holes
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