Hertel 1-203-0800 4-jaw Lathe Chuck 8 Inch Plain Back

Product Description

The HERTEL 1-203-0800 is a self-centering 4-jaw manual lathe chuck designed for use on metalworking lathes in production, toolroom, and job-shop environments. The chuck measures 8 inches in diameter with a plain back mount and is rated to 2,500 RPM maximum. Constructed from cast iron, it provides rigid workholding with an axial runout of 0.0010 inches and a radial runout of 0.0016 inches. The reversible jaws cover a jaw capacity range from 5/32 inches minimum up to 7-7/8 inches maximum, making it suitable for a wide variety of round and symmetrical workpieces. Installation and use require a qualified machinist or toolroom technician.

This chuck is intended for manual lathe applications in machine shops, maintenance facilities, and manufacturing environments where consistent, repeatable workholding is required. The self-centering action allows for fast, accurate mounting of round stock without individual jaw adjustment. The plain back mount style is compatible with lathe spindles that accept a back plate fitted to the specific spindle nose configuration. The 8-inch diameter size is commonly used on mid-size engine lathes and toolroom lathes handling medium-diameter workpieces.

Key Features

• Self-centering 4-jaw design for fast, repeatable chucking of round and symmetrical stock
• 8-inch chuck diameter with a maximum jaw capacity of 7-7/8 inches
• Rated to 2,500 RPM maximum for general turning operations
• Reversible jaws extend capacity range from 5/32 inches to 7-7/8 inches
• Axial runout of 0.0010 inches and radial runout of 0.0016 inches for precision workholding
• Cast iron body construction for rigidity and long service life

Compatibility

Designed for use on manual lathes equipped with a plain back spindle nose that accepts a separately fitted back plate. Back plate must be sourced and machined to match the specific lathe spindle nose configuration; a back plate is not included.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Always power down and lock out the lathe before mounting or removing the chuck. A properly fitted back plate is required to mount this chuck to the lathe spindle; back plate bore and register must be machined to match the spindle nose before use. Verify runout with a dial indicator after mounting and before operating the machine.