- HELP
- Technical Information
- [FA Mechanical Parts] Turning Parts
- Accuracy and Machining Specifications
- Accuracy and Machining Specifications
Accuracy and Machining Specifications
Appearance Quality
Machining surface (outer diameter)
EN AW−5056 Equiv.
EN 1.1191 Equiv.
Notes
- There will be no scratches of more than 0.7 mm on the surface.
- Surface roughness: √Ra6.3 [√Rz25]
- Depending on the material and size, the product may be supplied with an untreated surface.(polishing and rolling). Please see below for details.
- See below for more details → [FA Mechanical Parts] Turning Parts＞Conditions of Use for Standard Materials (Polished bars and Cold finished material)
Machining surface (inner diameter)
EN 1.1191 Equiv.
EN 1.4301 Equiv.
Milling face
EN 1.1191 Equiv.
EN 1.4301 Equiv.
Caution
Machining marks may remain.Wire-Cut EDM Surfaces
Wire-cut EDM surface
Enlarged view: Wire-cut EDM surface
Because it is a fusion cutting process in which the metal is melted and cut by discharges from electrodes, the surface is not glossy.
Surface Treatment Quality Standards
Caution
- Since it is difficult to check the coating thickness for small diameter precision holes, etc., additional machining may be performed after machining, so the surface treatment cannot remain on the cut surface.
- The surface treatment may not remain on the inside of holes as holes may be masked.
- Surface treatment suspension and electrode contact marks may remain on the product.
- To ensure contact for the following applicable surface treatments, at least one hanging shape from (1) to (5) above is required.
- If there is no feature in the model for hanging the part, a through-hole will be made at any position for hanging.
| Surface Treatment | Hanging Holes |
|---|---|
| Electroless Nickel Plating | ー |
| Hard Chrome | Target |
| Trivalent Chromate (Clear) | Target |
| Trivalent Chromate (Black) | Target |
| Black Oxide | ー |
| Salt-Bath Soft Nitriding | ー |
| Low Temperature Black Chrome | Target |
| Phosphating | ー |
| Clear Anodize | Target |
| Black Anodize | Target |
| Black Anodize (Matte) | Target |
| Hard Anodize (clear) | Target |
 |
 |
 |
 |
| Hard Chrome | Trivalent Chromate (Clear) | Trivalent Chromate (Black) | Low Temperature Black Chrome |
 |
 |
 |
|
| Clear Anodize | Black Anodize | Black Anodize (Matte) |
Quenching Quality Standards
Appearance after quenching
After quenching
Blast Finish
Grinding finishing (outer diameter)
Grinding finishing (inner diameter)
Caution
- The surface is cleaned by sandblasting after hardening. The accuracy is not reduced by this process.
- The photo shows sandblasting, but in some cases shotblasting can also be used. The blasting method cannot be specified.
- If there are tolerances for the outer and inner diameters, grinding may be included the finishing process. In this case, the appearance will change as shown in the figure above.
- Grinding cannot be specified. Whether to grind is decided in the factory under the aspect of quality assurance.
- As the thread is also hardened, the thread may be damaged depending on the application. Specifications such as “No hardening for the thread only” are not acceptable.
Conditions of Use for Standard Materials (Polished bars and Cold finished material)
If the maximum diameter is applicable for a standard material, the standard material is used at the factory’s discretion and the appearance will be different.
Machined
Cold finished material
Polished bar
Selection conditions for standard materials
| Tolerance | |||||
|---|---|---|---|---|---|
| IT6 | g6、h7 | h9 | Other (IT7 or above, general tolerance, etc.) | ||
| Surface Roughness | Ra6.3 | Machined | Polished bar or Machined | Polished bar, Cold finished material, or Machined | Polished bar, Cold finished material, or Machined |
| Ra3.2 | Machined | Polished bar or Machined | Polished bar, Cold finished material, or Machined | Polished bar, Cold finished material, or Machined | |
| Ra1.6 | Machined | Polished bar or Machined | Machined | Polished bar or Machined | |
Standard material correspondence table
SCM440 (26 to 32 HRC)〇
| Material | Machined | Cold finished material(h9) | Polished bar(g6、h7) |
|---|---|---|---|
| EN 1.1191 equiv. | 〇 | 〇 | 〇 |
| EN 1.0038 equiv. | 〇 | 〇 | |
| SCM435 | 〇 | ||
| EN 1.2825 equiv. | 〇 | ||
| EN 1.2379 equiv. annealed | 〇 | ||
| EN 1.2344 equiv. | 〇 | ||
| EN 1.3505 equiv. | 〇 | ||
| EN AW−2017 equiv. | 〇 | ||
| EN AW−5056 equiv. | 〇 | ||
| EN AW−6061 equiv. | 〇 | ||
| EN AW−7075 equiv. | 〇 | ||
| EN 1.4305 equiv. | 〇 | 〇 | |
| EN 1.4301 equiv. | 〇 | 〇 | |
| EN 1.4401 equiv. | 〇 | 〇 | |
| 1.4125 equiv. annealed | 〇 | ||
| Brass C3604-LCd | 〇 |
Round bar specification table
| Material | Maximum Diameter (h9) |
|---|---|
| EN 1.0038 equiv. | diameter 3 to diameter 30 (1 mm increments) |
| Φ32 | |
| Φ34 | |
| Φ35 | |
| Φ36 | |
| Φ38 | |
| Φ40 | |
| Φ42 | |
| Φ44 | |
| Φ45 | |
| Φ46 | |
| Φ48 | |
| Φ50 |
| Material | Maximum Diameter (g6、h7、h9) |
|---|---|
| EN 1.1191 equiv. | Φ3～Φ30 (1 mm increments) |
| Φ32 | |
| Φ34 | |
| Φ35 | |
| Φ36 | |
| Φ38 | |
| Φ40 | |
| Φ42 | |
| Φ44 | |
| Φ45 | |
| Φ46 | |
| Φ48 | |
| Φ50 |
| Material | Maximum Diameter (g6、h7) |
|---|---|
| EN 1.4305 equiv. EN 1.4301 equiv. EN 1.4401 equiv. | Φ3~Φ18(1 mm increments) |
| Φ20~Φ26(1 mm increments) | |
| Φ28 | |
| Φ30 | |
| Φ32 | |
| Φ35 | |
| Φ36 | |
| Φ38 | |
| Φ40 | |
| Φ42 | |
| Φ45 | |
| Φ50 |
Caution
- If it is not included in the standard table, it will be shaved.
- For others, the raw material is more likely to be chosen as the standard material.
What is maximum diameter?
- The maximum diameter refers to the largest diameter on the cylindrical surface of the product. (highlighted in light blue)
- Even if the surface is divided by a groove as shown in Example 3, the surface is recognised as a single element if it has the same diameter.
Figure 1
Figure 2
Figure 3