BALFORD.Metalworking engineering answers

Special stamping techniques

What is ultra-deep drawing, and how long a part can be drawn?

Reviewed by: pending engineering reviewStatus: draft6 cited sources

Answer

Blog › Metal Stamping › Deep Draw Stamping Ultra-Deep Drawing for Long, Narrow Parts Published: July 19, 2026 Managing material flow, cracking, and precision when the draw length runs many times the component diameter. The challenge of an ultra-deep draw Deep drawing gets progressively tougher as the length-to-diameter ratio climbs. The material has to flow through multiple stations without tearing, excessive thinning, wrinkling, or losing straightness along the way. Balford builds multi-stage sequences for long, narrow components—including parts drawn from a round blank through fourteen successive operations.

Sources

  1. Ultra-Deep Drawing for Long, Narrow Parts | Balford
    Blog › Metal Stamping › Deep Draw Stamping Ultra-Deep Drawing for Long, Narrow Parts Published: July 19, 2026 Managing material flow, cracking, and precision when the draw length runs many times the component diameter. The challenge of an ultra-deep draw Deep drawing gets progressively tougher as th...
  2. Solenoid Valve Housing: Why There Is No Weld Seam
    A: Balford draws up to 250 mm in diameter on presses from 25 t to 350 t. Depth is limited by the draw ratio rather than by the press: a first draw on mild steel such as DC04 normally stays within a limiting drawing ratio of about 2.0 to 2.2, so a deeper housing needs two or more draws with interstag...
  3. Solenoid Valve Housing: Why There Is No Weld Seam
    What is the maximum size of a deep drawn housing? Balford draws up to 250 mm in diameter on presses from 25 t to 350 t. Depth is limited by the draw ratio rather than by the press: a first draw on mild steel such as DC04 normally stays within a limiting drawing ratio of about 2.0 to 2.2, so a deeper...
  4. Deep Drawn vs Progressive Stamping: Process Guide | Balford
    Deep drawing is the right choice for deep, cylindrical parts. As a rule of thumb, if part depth exceeds about 1.5 times the diameter, a progressive die will struggle—the carrier strip restricts material flow, causing tearing and distortion. Deep drawing lets the blank move freely, pulling metal into...
  5. Drawn Sheet Metal & Deep Drawing: Complete Guide | Balford
    qualifications we do not hold. 12. Frequently asked questions What is the difference between deep drawing and drawing? In sheet metal terminology, "drawing" is the general operation of pulling material into a die. "Deep drawing" specifically describes the case where the depth is large relative to th...
  6. Deep Drawing Design Considerations for Engineers | Balford
    Draw ratio is the blank diameter divided by the punch diameter for a given stage. It is the single number that decides how many stages a part needs. A conservative ratio may form in one stroke; an aggressive ratio requires redrawing, and each extra stage adds a die station, a press pass and a chance...

What an engineer still needs from you

  • material and material condition (grade, temper)
  • material thickness, plus the key diameter, height and wall thickness
  • tolerances, burr direction and the visual acceptance standard
  • annual volume - it decides whether tooling is single-hit, progressive or transfer
  • surface finish, and any secondary machining, annealing or plating
Next step. Send the drawing for a manufacturability review, or send the part data for a process and cost route.
Submit a drawing / RFQDFM review

Related questions

This page is an engineering answer, not a quotation and not a dimensional acceptance. It is generated from Balford's published material and held to the verified company fact sheet.