Jacket Draw Press

Advanced Jacket Forming System

Servo-Driven Jacket Drawing The OTM-5175J leverages servo-driven technology to execute a multi-stage drawing process, transforming copper strips—typically gilding metal alloy—into seamless jackets through blanking (punching discs), cupping (forming shallow cups), and progressive deep drawing for elongation and wall thinning. The 75-ton servo press ram, adjustable from a 2-inch to 8-inch stroke, allows dynamic control over force, stroke length, and drawing speed via the Weintek HMI, enabling lubricant adjustments, annealing cycle integration, and multi-program memory for storing parameters. This precision ensures high-accuracy output for calibers like .50 BMG, with tight tolerances (±0.001″ wall thickness), while the part present die protection system prevents errors, enhancing reliability in high-volume production.

• Process: Blanking, cupping, and multi-stage deep drawing
• Outcome: Uniform wall thickness, precise geometries, minimal defects like wrinkling or tearing
• Applications: FMJ, JHP, and TMJ jackets for pistol, rifle, and large-caliber bullets (.380 ACP to .50 BMG)

Servo-Controlled Transfer System The OTM-5175J’s servo-controlled transfer system, featuring a servo transfer bar, servo strippers, and servo ejectors, ensures seamless movement of copper blanks through multiple drawing stations. This system supports complex forming sequences, maintaining precise alignment for progressive reduction and elongation. The interchangeable tooling packs allow rapid caliber changes, making the press versatile for standalone or integrated bullet production lines. Anti-static systems prevent energetic buildup during handling, and multi-feed options enhance throughput for specialty jacket production.

• Mechanism: Servo-driven transfer bar, strippers, and ejectors for multi-station drawing
• Benefit: Enhances precision and efficiency in jacket production, reducing cycle times and material waste
• Applications: Copper jackets for FMJ projectiles, JHP bullets, multi-piece assemblies

Jacket Drawing for Ammunition Jacket drawing is a cornerstone of ammunition manufacturing, utilizing deep drawing techniques to form gilding metal (copper-zinc alloy) strips into elongated, seamless tubes with high ductility, corrosion resistance, and structural integrity. The OTM-5175J excels in producing drawn jackets for applications requiring superior ballistic performance and dimensional accuracy, such as military FMJ and hunting JHP rounds. The servo-driven system optimizes draw ratios, wall uniformity, and surface finish, incorporating dwell actions to minimize defects like splitting or uneven thinning, while reducing material waste and ensuring compatibility with subsequent processes like core insertion or ogive forming. Industry insights emphasize drawing’s role in achieving reliable jacket expansion, penetration, and mushrooming, making the OTM-5175J a critical tool for precision projectile crafting.

• Advantages: Seamless construction, high tensile strength, uniform grain structure for better accuracy and reduced fouling
• Applications: Jackets for .380 ACP to .50 BMG, including military-grade FMJ and JHP hunting bullets
• Servo Benefits: Programmable motion profiles and force control improve drawing quality, repeatability, and energy efficiency

Robust Press Design The OTM-5175J features a weldment frame engineered for durability, with a machined bolster plate and press ram honed for flatness and accuracy. The 75-ton press capacity and heavy-duty linear ram guides ensure stability during high-force drawing operations, while the servo indexer enhances cycle efficiency. A coolant tank with sealed drain area, automatic oiler, and scrap chute for trim rings or flash ejects maintain a clean, efficient workspace. The full machine enclosure, magnetic door interlocks, and 3/8″ polycarbonate guarding provide operator safety, making the press a reliable, low-maintenance solution.

• Components: 75-ton servo ram, coolant system, carbide tooling, servo indexer
• Benefit: Ensures long-term reliability and high-throughput jacket production
• Environment: Sealed coolant system and scrap chute minimize mess and maintenance