Bison Lathe Chuck 4-Jaw Self Centering Chuck 12.5" Diameter 1028 00

Workholding

Elevate your machining capabilities with the Bison 12-1/2" 4-Jaw Self-Centering Lathe Chuck (Model 1028 00) — a premium workholding solution engineered for high-accuracy lathe operations. Designed for professional machinists, fabricators, and industrial shops, this chuck provides reliable self-centering performance and robust clamping power for a wide range of turning applications.

🔧 Product Overview

This heavy-duty 12.5-inch diameter self-centering lathe chuck features four synchronized jaws that automatically center your workpiece as they close, saving setup time and increasing productivity compared to independent jaw chucks. Its rugged construction and precision-manufactured surfaces make it ideal for repetitive and demanding jobs on medium- to large-sized lathes.

🛠️ Key Features & Benefits

✔️ Self-Centering 4-Jaw Design

The synchronized jaw mechanism ensures that all four jaws move together to automatically center round, square, or irregular-shaped workpieces — combining versatility with faster setup.

✔️ Large 12.5″ Diameter Capacity

Generous chuck size supports a broad range of workpiece diameters, making it suitable for heavy-duty turning and larger components typical in industrial and production environments.

✔️ High-Precision Workholding

Machined cast-iron or semi-steel body and hardened jaws deliver consistent gripping force and long-term reliability. Precision construction reduces run-out and enhances surface finish quality.

✔️ Durable Construction

Designed to withstand heavy machinist workloads, this chuck combines robust materials with precision-ground components to resist wear and maintain true concentricity over time.

✔️ Versatile Clamping

Ideal for holding cylindrical, square, or asymmetrical parts — perfect for automotive, aerospace, metal fabrication, and general machining workshops.

📊 Typical Specifications

• Chuck Diameter: 12.5 inches (large work capacity)
• Jaw Style: Self-centering 4-jaw scroll mechanism
• Body Material: Rugged cast iron or semi-steel (model dependent)
• Through-Hole: Large bore supports tooling and material pass-through (exact measurement varies)
• Jaw Movement: Simultaneous self-centering motion
• Precision Class: Standard accuracy for repeatable results

(Actual specifications may vary slightly by supplier and model series — be sure to verify compatibility with your machine spindle and back-plate configuration.)

📌 Ideal Applications

• Heavy-duty turning & finishing on metal lathes
• Production machining where setup time is critical
• Workholding for round, square, and irregular stock
• Repetitive manufacturing and industrial environments
• Automotive and fabrication shop operations

✅ Why Choose This Bison Chuck?

The Bison 12-1/2" 4-Jaw Self-Centering Lathe Chuck (1028 00) is engineered for machinists who demand accuracy, durability, and ease of use. Its synchronized jaw action makes setup faster than traditional independent chucks, while its rugged construction ensures years of consistent service in heavy machining environments. Whether you’re facing large workpieces or need dependable workholding for high-volume production, this chuck stands up to the challenge. 

12.5 in diameter 4 inch bore bison self centering 4 jaw lathe chuck.