Accuracy and Machining Specifications

Appearance Quality

Machining surface (outer diameter)

EN AW−5056 Equiv.​

EN 1.1191 Equiv.

Notes

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.

Cut off

Cutting

Wire Cutting

Caution

Processing method cannot be specified.

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

23567_10_deEN

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
Hard Chrome Trivalent Chromate (Clear) Trivalent Chromate (Black) Low Temperature Black Chrome
Clear Anodize Black Anodize Black Anodize (Matte) Hard Anodize (clear)
Clear Anodize Black Anodize Black Anodize (Matte) Hard Anodize (clear)

Quenching Quality Standards

Appearance after quenching

After quenching

Blast Finish

Grinding finishing (outer diameter)

Grinding finishing (inner diameter)

Caution

  • The surface can be 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.
  • The threads will also be hardened. Depending on the application, the thread may be damaged. If you do not want the thread to be hardened, please specify Selective Hardening (Induction Hardening) to select an area that does not include the thread.
  • Hardness measurement marks may remain in areas where surface roughness is not specified or near the center of the end face of the part.  To confirm the inspection points in advance, please add information in the comments and request a manual quote
Induction Hardening

Caution

  • ・Grinding may be performed to guarantee accuracy for tolerances on the outer or inner diameter. The appearance of ground surfaces will be as shown in the above figure.
  • ・Grinding cannot be specified. The factory will determine if grinding is necessary to guarantee dimensional accuracy.
  • ・A hardened depth of 1mm or more into the part surface is guaranteed. The hardened depth may be 1.5 mm or more.
  • ・The hardened depth cannot be specified.
  • ・The Induction Hardening process may also harden edges and surfaces adjacent to the surface specified for hardening.

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
POM (white, black) 〇
MC Nylon (blue,black ash) 〇
ABS (natural color, black) 〇
PEEK (grey-brown) 〇
PC (transparent, black) 〇
PP (Standard, natural color) 〇
PPS (transparent, natural color) 〇
Acrylic (Standard, transparent) 〇
UHMWPE (white) 〇
PVC(grey) 〇

Round bar specification table

Material Maximum Diameter (h9)
EN 1.0038 equiv. diameter 3 to diameter 30 (1 mm increments)
ø32
ø34
ø35
ø36
ø38
ø40
ø42
ø44
ø45
ø46
ø48
ø50
ø52
ø55
ø56
ø58
ø60
ø65
ø70
ø75
ø80
ø85
ø90
ø95
ø100
ø105
ø110
ø115
ø120
ø125
ø130
ø140
ø150
Material Maximum Diameter (g6、h7、h9)
EN 1.1191 equiv. ø3～ø30 (1 mm increments)
ø32
ø34
ø35
ø36
ø38
ø40
ø42
ø44
ø45
ø46
ø48
ø50
Material Maximum Diameter (h9)
EN 1.1191 equiv. ø52
ø55
ø60
ø65
ø70
ø75
ø80
ø85
ø90
ø95
ø100
ø110
ø120
ø130
ø140
ø150
Material Maximum Diameter (g6、h7)
EN 1.4305 equiv. EN 1.4301 equiv. EN 1.4401 equiv. ø3~ø18(1 mm increments)
ø20~ø26(1 mm increments)
ø28
ø30
ø32
ø35
ø36
ø38
ø40
ø42
ø45
ø50
Material Maximum Diameter (h9)
EN 1.4305 equiv. EN 1.4301 equiv. EN 1.4401 equiv. ø55
ø60
ø65
ø70
ø75
ø80
ø85
ø90
ø95
ø100
Material Maximum Diameter (h9)
EN 1.7220 equiv. ø4~ø12(1 mm increments)
ø12.7
ø13~ø21(1 mm increments)
ø22
ø24
ø25
ø26
ø28
ø30
ø32
ø35
ø40
ø45
ø50

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.
23567_17_deEN

Figure 1

23567_18_deEN
Figure 2
23567_19_deEN

Figure 3

Applicable conditions for Hexagonal rod

If the distance across the flats of the hexagon matches a standard size, it is processed with hexagonal bar stock and shipped.

Hexagonal surfaces may be scratched because they are stock, unmachined surfaces.

Example (1)

Example (2)

What is the distance across the flats?

The distance between two opposite sides of a hexagon.

Hexagonal rod standards and specifications table

Material
Tolerance(h12) Tolerance
EN 1.1191 equiv. EN 1.0038 equiv. EN 1.7220 equiv. EN 1.4305 equiv. EN 1.4301 equiv. EN 1.4401 equiv. Brass C3604-LCd
Distance across the flats 6 〇 〇 × 〇 〇 × 0 -0.15 〇 ±0.06
7 〇 〇 × 〇 〇 〇 〇 ±0.08
8 〇 〇 〇 〇 〇 〇 ×
9 〇 〇 × × × × ×
10 〇 〇 〇 〇 〇 〇 0 -0.18 〇
12 〇 〇 〇 〇 〇 〇 〇 ±0.11
13 〇 〇 〇 〇 〇 〇 ×
14 〇 〇 〇 〇 〇 〇 〇
17 〇 〇 〇 〇 〇 〇 〇
19 〇 〇 〇 〇 〇 〇 0 -0.21 〇
21 〇 〇 〇 〇 〇 〇 × ±0.18
22 〇 〇 〇 〇 〇 〇 〇
23 〇 〇 〇 〇 〇 〇 ×
24 〇 〇 〇 〇 〇 〇 〇
26 〇 〇 〇 〇 〇 〇 〇
27 〇 〇 〇 〇 〇 〇 〇
29 〇 〇 × 〇 〇 〇 ×
30 〇 〇 × 〇 〇 〇 0 -0.25 〇
32 〇 〇 × 〇 〇 〇 〇
35 〇 〇 × 〇 〇 〇 〇
36 〇 〇 × 〇 〇 〇 ×

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