JACOBS

About JACOBS

JACOBS is a brand historically associated with drill chucks and related spindle tooling, with a product line that includes Morse taper extensions, arbors, and other toolholding accessories. The brand's origins trace back to the early 20th century in the United States, where it became known for developing and manufacturing drill chucks for industrial and machine tool applications. Over time, the JACOBS name has been applied to a range of toolholding products used in drilling, milling, reaming, and other machining operations. The product families available through 3G Electric include Morse taper extensions in various configurations, such as MT2 to MT2, MT3 to MT3, MT4 to MT4, and adapters between different Morse taper sizes (e.g., MT3 to MT2, MT2 to MT3, MT4 to MT5, MT5 to MT4, MT3 to MT4). These extensions are used to increase the reach of tooling, adapt between spindle and tool shank sizes, and maintain concentricity and torque transmission in machining setups. The extensions are manufactured to standard Morse taper dimensions, with overall lengths ranging from approximately 6 7/8 inches to 11 3/4 inches, depending on the model. They are typically made from hardened and ground steel to provide wear resistance and accurate fit. The product line also includes drill chucks and arbors, though the current focus of 3G Electric's inventory is on Morse taper extensions. These products are used in industries such as metalworking, automotive, aerospace, and general manufacturing, wherever Morse taper spindles and tooling are employed. 3G Electric supplies JACOBS products globally, offering access to a catalog of 135 SKUs with specifications and logistics support. The company serves plant engineers, maintenance managers, and procurement specialists who require specific part numbers and configurations for their operations. 3G Electric provides product data, including manufacturer part numbers, taper sizes, and overall dimensions, to assist in selecting the correct extension for a given application. The company also supports the procurement process by providing quotes and handling international shipping. This allows buyers to source JACOBS tooling components alongside other industrial equipment, such as burners, pumps, and gas controls, from a single supplier. The JACOBS line available through 3G Electric is intended for maintenance, repair, and operations (MRO) as well as original equipment manufacturing (OEM) contexts where standard Morse taper tooling is used. The extensions are designed to interface with existing machine spindles and toolholders, providing a means to adapt or extend tooling without modifying the machine. This can be particularly useful in job shops, tool rooms, and production environments where flexibility in tooling setup is required. The products are specified by taper size, gender (male or female), and overall length, which are critical parameters for ensuring proper fit and function. 3G Electric's role is to make these products accessible to a global customer base, with a focus on providing accurate product information and efficient order fulfillment. The company does not manufacture JACOBS products but distributes them as part of its broader portfolio of industrial equipment. This allows customers to consolidate purchases and reduce the number of suppliers they need to manage. For technical buyers, the key considerations when selecting a JACOBS Morse taper extension include the taper size of the machine spindle and the tool shank, the required extension length, and the gender configuration (male or female) needed to mate with existing components. The extensions are typically used in low-to-moderate speed applications and are not intended for high-torque or high-speed operations beyond the design limits of the Morse taper interface. Proper installation and maintenance, including cleaning and inspection for wear, are important to ensure safe and accurate machining. 3G Electric provides access to these products with the aim of supporting maintenance and production activities across various industries.

Common Applications

• Metalworking job shops — JACOBS MT3 to MT3 Morse taper extension (30450DN) for extending reach when drilling deep holes on a milling machine.
• Automotive engine rebuilding — JACOBS MT2 to MT2 Morse taper extension (30446N) used in a drill press to adapt short tooling for cylinder head work.
• Aerospace component manufacturing — JACOBS MT4 to MT5 Morse taper extension socket (30455DN) to adapt MT4 tooling to an MT5 spindle on a large machining center.
• General maintenance and repair — JACOBS MT3 to MT2 Morse taper extension (30447DN) for adapting MT2 shank tools to an MT3 spindle in a maintenance workshop.
• Tool rooms and die maintenance — JACOBS MT5 to MT4 Morse taper extension (30454N) to reduce from MT5 spindle to MT4 tooling for precision reaming operations.
• Heavy equipment repair — JACOBS MT3 to MT4 Morse taper extension (30452N) used in a radial arm drill to adapt MT3 tools to an MT4 spindle for large hole drilling.