← All ToolsD/t Ratio Checker
D/t Ratio Checker
Evaluate tube wall thickness ratio to determine bendability, mandrel requirements, and tooling complexity before committing to a bend setup.
Input Parameters
in
in
Mild Steel (1018/1020) — Min radius: 1.5x OD
Calculated Results
D/t Ratio (OD / Wall)
15.4
Inner Diameter (ID)
0.870in
Wall % of OD
6.5%
Bendability Assessment
Medium Wall
Mandrel required for most bends. Wiper die helps at tight radii.
D/t Scale Reference
< 10Heavy WallNo mandrel needed
10–15Standard WallMandrel for CLR < 2D
15–25Medium WallMandrel required, wiper die recommended
25–40Thin WallMandrel + pressure die essential
> 40Very Thin WallSpecialized tooling required — contact Harco
D/t ratio is one factor in bend feasibility. Material hardness, bend radius, and machine capabilities also affect the outcome. Contact Harco engineering for production-grade specifications.
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