Jacobs 33363 Keyless Drill Chuck 0.039-0.512 in Threaded 1/2-20

Product Description

The JACOBS 33363 is a keyless drill chuck designed for threaded-mount applications requiring a wide capacity range and reliable clamping performance. It accepts bit shanks from 0.039 to 0.512 inches, making it suitable for a broad variety of drill bits and accessories. The chuck uses a ball bearing design and is constructed from steel for durability under repeated use. With a sleeve diameter of 1.73 inches and a closed length of 3.74 inches, it is sized for standard handheld and bench-top drilling equipment. No chuck key is required, allowing faster bit changes on the job.

This chuck is intended for use with drilling equipment fitted with a 1/2-20 threaded spindle. It suits professional tradespeople and machinists who need a dependable replacement or upgrade chuck on electric drills, drill presses, or similar rotating equipment. The keyless design is especially practical in field environments where tool changes must be made quickly without additional hardware.

Key Features

• Keyless operation for fast, tool-free bit changes
• Capacity range of 0.039 to 0.512 inches accommodates a wide variety of bit shanks
• Ball bearing construction for smooth chuck action and consistent clamping
• Steel chuck body for strength and long service life
• 1/2-20 threaded mount for compatibility with standard spindle sizes
• Sleeve diameter of 1.73 inches and closed length of 3.74 inches

Compatibility

Designed as an OEM-style replacement or upgrade keyless drill chuck for drilling equipment with a 1/2-20 threaded spindle mount.

Installation Notes

Installation should be performed by a qualified technician familiar with rotating tool equipment. Disconnect and de-energize the drill or drill press completely before removing or installing the chuck. Thread the chuck onto the spindle by hand first to avoid cross-threading, then tighten securely according to the equipment manufacturer's guidance. Verify chuck runout after installation before returning the tool to service.