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- [FA Mechanical Parts] Turning Parts
- Accuracy and Machining Specifications
- Appearance Quality
Appearance Quality
Appearance quality assurance range
Turning surface ( Outer diameter )
5056 Aluminum Alloy
1045 Carbon Steel
Notes
- We guarantee that there will be no scratches of 0.7 mm or more on the dot gauge and that no nails will be scratched.
- Surface roughness: √Ra6.3 [√Rz25]
- Depending on the material and size, the product may be shipped with an untreated surface (polishing and rolling). Please see below for details. →[FA Mechanical Parts] Turning Parts＞Conditions of Use for Standard Materials (Polished bars and Cold finished material)
Turning surface ( Inner diameter )
5056 Aluminum Alloy
304 Stainless Steel
Milling face
1045 Carbon Steel
304 Stainless Steel
Caution
Although cutter marks may remain, specification in relation to the marks is not supported.Wire-Cut EDM Surfaces
Wire-Cut EDM Surfaces
Enlarged view: Wire-cut EDM surface
Tip
Because this is a fusion process in which an electric discharge from an electrode melts the metal for cutting, it is not characterized by a shiny surface like cutting.Surface Treatment Quality Standards
Caution
- Since film thickness management is difficult for small diameter precision holes, etc., additional machining may be carried out after processing, and as a result, the surface treatment may not remain on the cutting 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 points for the following target surface treatments, at least one of the hanging shapes listed in (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 Plating | Target |
| Trivalent Chromate (clear) | Target |
| Trivalent Chromate (black) | Target |
| Black Oxide | ー |
| Salt-Bath Nitrocarburizing | ー |
| Low Temperature Black Chrome | Target |
| Phosphate Coating | ー |
| Clear Anodize | Target |
| Black Anodize | Target |
| Black Anodize (matte) | Target |
| Hard Anodize (Clear) | Target |
 |
 |
 |
 |
| Hard Chrome Plating | 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 finishing
Grinding finishing (outer diameter)
Grinding finishing (inner diameter)
Caution
- Blasting is performed to remove surface contamination after quenching. There is no change in accuracy due to the treatment.
- The photo shows sandblasting, but shot blasting is also available. Blast type cannot be specified.
- If there are tolerances in the outer and inner diameters, grinding may be performed in the finishing process. In such cases, the appearance will change as shown in the above figure.
- Grinding cannot be specified. Whether to carry out grinding will be determined at the factory from the perspective of accuracy assurance.
- Since the threaded part is also hardened, there are cases where the threaded part may be damaged depending on the application. We currently do not accept specifications such as “only the threaded part cannot be hardened”.
Conditions of Use for Standard Materials (Polished bars and Cold finished material)
If the maximum diameter is applicable to the standard material, the factory will use the standard material at its own discretion, which may result in differences in appearance.
Machined
Cold finished material
Polished bar
Selection criteria for standard materials
| Tolerance | |||||
|---|---|---|---|---|---|
| IT6 | g6 and 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 | |
Corresponding table of standard materials
| Material | Machined | Cold finished material（h9） | Polished bar（g6 and h7） |
|---|---|---|---|
| 1045 Carbon Steel | 〇 | 〇 | 〇 |
| 1018 Carbon Steel | 〇 | 〇 | |
| 4135 Alloy Steel | 〇 | ||
| 4140 Alloy Steel | 〇 | ||
| O1 Tool Steel | 〇 | ||
| SKD11 | 〇 | ||
| SKD61 | 〇 | ||
| SUJ2 | 〇 | ||
| 2017 Aluminum Alloy | 〇 | ||
| 5056 Aluminum Alloy | 〇 | ||
| 6061 Aluminum Alloy | 〇 | ||
| 7075 Aluminum Alloy | 〇 | ||
| 303 Stainless Steel | 〇 | 〇 | |
| 304 Stainless Steel | 〇 | 〇 | |
| 316 Stainless Steel | 〇 | 〇 | |
| 440C Stainless Steel | 〇 | ||
| Brass C3604-LCd | 〇 |
Round bar specification table
| Material | Maximum Diameter (h9) |
|---|---|
| 1018 Carbon Steel | ø3 to ø30 (1 mm increments) |
| Φ32 | |
| Φ34 | |
| Φ35 | |
| Φ36 | |
| Φ38 | |
| Φ40 | |
| Φ42 | |
| Φ44 | |
| Φ45 | |
| Φ46 | |
| Φ48 | |
| Φ50 |
| Material | Maximum Diameter (g6 and h7 and h9) |
|---|---|
| 1045 Carbon Steel | ø3 to ø30 (1 mm increments) |
| Φ32 | |
| Φ34 | |
| Φ35 | |
| Φ36 | |
| Φ38 | |
| Φ40 | |
| Φ42 | |
| Φ44 | |
| Φ45 | |
| Φ46 | |
| Φ48 | |
| Φ50 |
| Material | Maximum Diameter (g6 and h7) |
|---|---|
| 303 Stainless Steel 304 Stainless Steel 316 Stainless Steel | 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.
- Shaving will be used for non-standard materials
What is maximum diameter?
- The maximum diameter on the cylindrical surface of the product. (highlighted in light blue)
- Even if the groove is divided by a groove as shown in Figure 3, it is recognized as one element as long as it has the same diameter.
Figure 1
Figure 2
Figure 3