Greenlee 50385291 Replacement High-Speed Steel Pilot Drill Bit Arbor, Hex Shank

Greenlee 50385291 Replacement High-Speed Steel Pilot Drill Bit Arbor, Hex Shank

The Greenlee 50385291 Replacement High-Speed Steel Pilot Drill Bit Arbor is engineered as a replacement component for hole saw and bit assemblies used by electrical and mechanical trades professionals. This arbor is fitted with a high-speed steel pilot drill bit on a hex shank, designed for compatibility with drivers accepting a minimum chuck size of 3/8 IN (9.500 MM). With a shank diameter of 5/16 IN (7.900 MM), this arbor is built to restore cutting performance to existing hole saw setups without requiring a full tool replacement. Packaged in bulk pack quantities and manufactured in the US, this Greenlee replacement pilot drill bit arbor is a practical, cost-effective solution for keeping drilling equipment in service on the job site.

Key Features

• Hex Shank Design: Hex shank construction provides secure engagement in compatible drivers for reliable torque transfer during drilling.
• Durable Construction: Built with a high-speed steel pilot drill bit for consistent cutting performance and extended usability in demanding job-site conditions.
• Shank Diameter: 5/16 IN (7.900 MM) shank diameter ensures proper fit and secure holding in compatible chucks.
• Minimum Chuck Size: Compatible with drivers and chucks rated to a minimum of 3/8 IN (9.500 MM) for dependable operation.
• Replacement Part: Designed as a direct replacement pilot drill bit arbor, allowing electricians and contractors to restore existing hole saw tooling rather than purchasing an entirely new unit.
• Bulk Packaging: Supplied in a bulk pack format, well suited for shops, contractors, and service crews that need replacement pilot bits on hand for ongoing maintenance.
• Country of Origin: Manufactured in the US for quality and consistency.

Technical Specifications

• Country Of Origin: US
• Minimum Chuck Size: 3/8 IN (9.500 MM)
• Package: Bulk Pack
• Product Material: High Speed Steel Pilot Drill Bit
• Product Type: Hex Shank
• Shank Diameter: 5/16 IN (7.900 MM)

Typical Applications

• Electrical Conduit and Box Installation Drilling
• Hole Saw Tooling Maintenance and Replacement
• Commercial and Industrial Electrical Contracting
• Panel and Enclosure Fabrication
• General Trade Drilling Applications

Why Greenlee?

Greenlee is a trusted name among electrical and mechanical trades professionals for tools and replacement parts built to keep crews working. The 50385291 replacement pilot drill bit arbor features high-speed steel construction and a hex shank designed for compatible drivers, giving contractors a reliable way to maintain existing hole saw equipment without downtime. Manufactured in the US and offered in a bulk pack, this Greenlee replacement part supports dependable, code-compliant performance on the job, helping crews avoid costly full-tool replacements when only the pilot bit arbor needs attention.