Bending and R-bending with special tools – Overview materials and sizes

Applicable sheet thickness and Radius size for R-bend shapes

  • R-bend shapes are generally manufactured using a feed bending process. This creates continuous tool marks that remain on the bent part. For details, please see “Bending Specifications“.
  • If feed bending is difficult, we will propose radius sizes for which normal bending or special R-bend tools can be used. If this is acceptable, we will automatically change the R size on the meviy part.
  • For details, please refer to the R-size conversion table below.
■Inner R range that can be feed bent
ThicknessMinimum inner RMaximum inner R
0.810150
1.010150
1.210150
1.510150
1.610150
2.010 *150
2.315150
2.510150
3.030150
3.230150

*Steel material minimum inner R is R15.

■R-size conversion table for when Feed bending is not possible.
Inner R size before conversionInner R size after conversionBending process used
Within twice the sheet thicknessThickness (reference value)Normal Bending
Less than R3Thickness (reference value)
R3 ≤ R ＜ R6R3R-bending with special tools
R6 ≤ R ＜ R10R6
R10 ≤ R ＜ R12.5R10
R12.5 ≤ R ＜ R15R12.5
R15 ≤ R ＜ R17.5R15
R17.5 ≤ R ＜ R20R17.5
R20 ≤ R ＜ R22.5R20
R22.5 ≤ R ＜ R25R22.5
R25 ≤ R ＜ R30R25
R30 ≤ R
  • Not available
  • *Please request a manual quote.
ー

Applicable materials and surface treatments for R-bend shapes

Materials and surface treatments available for R bending are as follows.

Material: SteelSurface TreatmentR bending available
Feed BendingR-bending with special tools
  • EN 1.0330 equiv.
  • [EN 1.0320 equiv. (hot coiled)]
–Automatic QuotationAutomatic Quotation
Powder Coating
Painting
Electroless Nickel Plating
Black Oxide
Trivalent Chromate (clear)
Trivalent Chromate (Black)Automatic QuotationManual Quotation

EN 1.0330 equiv. (Electrolytic Zinc Plating)

Electrolytic PlatingAutomatic QuotationAutomatic Quotation

EN 1.0330 equiv. (Galvanized)

Galvanized
Material: Stainless Steel Finishing Method R bending available
Feed Bending R-bending with special tools
EN 1.4301 equiv. 2B Automatic Quotation Automatic Quotation
  • Single-sided #400 grit polishing (appearance side)
  • protective film on one side
 Manual Quotation
  • Single-sided hairline (appearance side)
  • protective film on one side
 Manual Quotation Not Supported
EN 1.4016 equiv. 2B Automatic Quotation Automatic Quotation
Material: AluminumSurface TreatmentR bending available
Feed BendingR-bending with special tools
EN AW−5052 equiv.—Automatic QuotationAutomatic Quotation
Anodized (clear)
Anodized (Black)
Anodized (matt black)
Trivalent Chromate Passivation (SurTec 650)
  • EN AW-5052 equiv.
  • (pre-finished anodized plate (clear))
Clear Anodize
  • EN AW-5052 equiv.
  • (pre-finished anodized plate (black))
Black Anodize
Material: Perforated MetalHole Diameter × Hole PitchR bending available
Feed BendingR-bending with special tools
  • EN 1.4301 equiv. -BA 60° Staggered Round Hole Type
ø1 × 2pAutomatic QuotationAutomatic Quotation
ø2 × 3p
ø3 × 5p
ø5 × 8p
ø8 × 12p

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