• Bridgeport-Style R8 Custom Base:
This R8 shank blank arbor is specially designed for Bridgeport-style mills and larger milling machines. Its soft, machinable stub allows you to create custom tool holders, specialized boring bars, and unique cutters with complete flexibility.
• 7/16" UNF Drawbar Thread:
The arbor features a standard 7/16" × 20 UNF internal drawbar thread, which is the industry standard for R8 spindles. This ensures the arbor is securely locked inside the spindle during milling operations, improving safety and reducing vibration.
• Large Machinable Stub:
The blank end (stub) is intentionally kept soft and machinable, allowing you to turn, drill, tap, or groove it on a lathe to create specialized tooling. It is ideal for applications where standard tool holders are not suitable.
• Hardened & Precision Ground R8 Shank:
The shank is manufactured from premium alloy steel, hardened to industrial standards and precision-ground to ensure perfect spindle alignment and a zero-play fit, which is essential for high-accuracy milling and indexing.
• Heavy-Duty Construction:
With a robust weight of 1.36 pounds, this arbor is built to withstand high torque and demanding industrial workloads, making it suitable for professional workshops and serious engineers.
• Precision & Adaptability:
This arbor expands the versatility of R8 spindle machines, enabling machinists to create custom tool adapters and mandrels for specialized workshop or production applications.
