This document describes the Grizzly Industrial 4-Jaw Self-Centering Chuck for Wood Lathes, models H6264, H6265, H6266, H6267, and H7820. It serves as an instruction sheet providing details on the chuck's operation, parts, and maintenance.
Function Description:
The 4-Jaw Self-Centering Chuck is designed for use with wood lathes, specifically those with a 12" (300 mm) capacity or smaller. Its primary function is to securely hold workpieces for turning operations. The self-centering mechanism ensures that all four jaws move simultaneously and symmetrically, centering the workpiece automatically. This chuck is versatile, capable of both outside diameter (O.D.) and inside diameter (I.D.) gripping, making it suitable for a wide range of woodworking projects. It also includes a wood screw for holding small, cross-grained pieces, expanding its utility for specific applications.
Important Technical Specifications:
- Models: H6264, H6265, H6266, H6267, H7820
- Chuck Type: 4-Jaw Self-Centering
- Application: Wood Lathes
- Lathe Capacity: Ideal for 12" (300 mm) capacity lathes and smaller.
- Minimum Gripping O.D.: 1.25"
- Minimum Gripping I.D.: 1.8"
- Included Accessories:
- 4-Jaw Self-Centering Chuck (1)
- Wood Screw (1)
- T-handle hex wrench, 3mm (1)
- T-handle hex wrench, 8mm (1)
- Wood Screw Hole Recommendation: For use with the wood screw, a 7-8 mm diameter hole, 25 mm deep, should be drilled in the center of the workpiece.
Usage Features:
The chuck is designed for straightforward operation, facilitating quick and secure workpiece mounting.
- Jaw Operation: The jaws are opened and closed using an 8mm hex wrench inserted into a designated opening on the chuck body. Turning the wrench clockwise typically closes the jaws, while counter-clockwise opens them, or vice-versa depending on the specific chuck orientation.
- Workpiece Placement:
- With the chuck mounted on the lathe, the jaws are opened to accommodate the workpiece.
- The workpiece is then inserted between the jaws, ensuring it is seated firmly against the jaw face.
- The jaws are closed to securely clamp the workpiece.
- To remove the workpiece, the jaws are opened until the workpiece is free.
- Wood Screw Usage:
- A 7-8 mm diameter hole, 25 mm deep, is drilled in the center of the workpiece. It's important to ensure the workpiece is as round as possible.
- The wood screw is mounted in the chuck, with its shoulder clamped between the backing jaws.
- The workpiece is then screwed onto the wood screw until it is firmly against the jaws.
- After machining is completed, the workpiece is unscrewed.
- Jaw Configuration: The jaws are configured for both outside diameter (O.D.) and inside diameter (I.D.) gripping, providing flexibility for various turning tasks. The self-centering design simplifies setup by automatically centering the workpiece.
Maintenance Features:
Regular maintenance is crucial for the longevity and optimal performance of the chuck.
- Daily Lubrication: To maintain smooth operation, it is recommended to spray oil into the scroll mechanism daily and work the jaws through their full range of motion. This ensures that the internal components remain lubricated and free-moving.
- Cleaning: The chuck should be regularly checked for dust build-up in the scrolls and jaws. Cleaning is required as needed to prevent debris from interfering with jaw movement and accuracy.
- Jaw Removal and Installation:
- Removal: To remove the jaws and backing jaws, a stop pin located in the slot of jaw #4 must be removed. This allows the jaws to travel beyond the scroll and be pulled out of their slots for thorough cleaning or replacement.
- Installation: When reinstalling, ensure that jaw #1 is placed into slot #1, and so on for the remaining jaws. The scroll should then be turned until all jaws are engaged. Continue turning the scroll until the pin hole in slot #4 is visible, at which point the stop pin can be reinserted. This process ensures correct alignment and functionality of the jaws.
Safety Precautions:
- Always follow all safety procedures for woodworking when using this chuck.
- Keep all plastic bags included in packaging out of the reach of children to prevent suffocation.
This chuck is a robust and essential tool for woodturners, offering reliable gripping and ease of use for a variety of projects on compatible lathes. Proper maintenance ensures its continued performance and extends its lifespan.
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