Draft Angle
Engineering definition, metallurgical mechanisms, standard testing specifications, and manufacturing guidelines for closed-die forgings up to 50 kg.
Quick AnswerFeatured
The slight taper machined into vertical cavity walls of a forging die to facilitate effortless extraction of the hot-forged component without sticking.
Technical Explanation & Metallurgical Principles
Without draft angles, hot steel shrinks onto die punches and sticks inside cavities as it cools. Standard closed-die forgings feature external draft angles of 5° to 7° and internal draft angles of 7° to 10°.
Key Engineering Specifications & Parameters
| Technical Parameter / Metric | Engineering Benchmark / Value |
|---|---|
| External Draft | 3° to 7° (typically 5° for hammer dies) |
| Internal Draft | 7° to 10° (compensates for inward thermal shrinkage) |
Application at Jayesh Forge (Rajkot Plant)
Engineered into all custom closed dies; where zero draft is required by customer prints, CNC finish machining removes the draft taper.
Related Materials, Standards & Products
Related Metallurgical & Testing Terms
Closed-Die Forging (Impression Die Forging)
A precision hot-forming process where heated metal billets are compressed inside custom-machined tool steel dies that completely enclose the workpiece, producing net or near-net components.
Parting Line (Die Mating Plane)
The dividing plane where the upper and lower halves of a forging die meet, creating the flash gutter seam.
Questions Regarding Draft Angle
Because cooling steel shrinks inward onto internal die plugs, locking the part inside the cavity unless a steeper release angle is provided.
Request a Forging Quote with Draft Angle Compliance
Our Rajkot metallurgy desk is ready to review your technical drawings, testing protocols, and delivery schedules for custom closed-die forgings strictly up to 50 kg.