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JET J‑4421‑4 20 In Disc Grinder 3PH 440 V
- $1,557.00
- Brands JET
- Product Code: 577011
- Availability: In Stock
JET J-4421-4 20 In. Disc Grinder 3-Phase 440VProduct OverviewThe JET J-4421-4 20 In. Disc Grinder is a heavy-duty industrial grinding machine built for demanding metalworking and fabrication environments. With a large 20-inch abrasive disc, powerful 3-phase motor, and 440V electrical configuration, this grinder is designed to provide consistent material removal, edge shaping, deburring, and surfac..
Industrial 20 In Disc Grinder with Tilting Table and 3HP Motor
JET J-4421-4 20 In. Disc Grinder 3-Phase 440V
Product Overview
The JET J-4421-4 20 In. Disc Grinder is a heavy-duty industrial grinding machine built for demanding metalworking and fabrication environments. With a large 20-inch abrasive disc, powerful 3-phase motor, and 440V electrical configuration, this grinder is designed to provide consistent material removal, edge shaping, deburring, and surface-finishing performance.
Its substantial construction provides a stable platform for shop-floor grinding, while the adjustable work table allows operators to position material accurately for different grinding applications. The machine is particularly well suited to production, maintenance, fabrication, and general industrial environments where durability and repeatable performance are important.
Key Features
20-Inch Grinding Disc: The large abrasive surface provides ample working area for a wide range of metal-grinding applications.
Heavy-Duty Industrial Construction: Designed for demanding shop environments where stability and durability are essential.
3-Phase 440V Power: The industrial electrical configuration is suited to facilities equipped with compatible three-phase power.
Adjustable Work Table: Allows the operator to position workpieces at the appropriate angle for grinding and finishing.
Large Work Surface: Provides additional support when handling larger or heavier workpieces.
Direct-Drive Design: Transfers motor power efficiently to the grinding disc for dependable operation.
Enclosed Drive Components: Helps protect internal components while providing a cleaner and safer machine configuration.
Industrial-Grade Grinding: Suitable for deburring, edge preparation, weld cleanup, stock removal, and general metal finishing.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | JET |
| Model | J-4421-4 |
| Machine Type | Disc Grinder |
| Disc Diameter | 20 in. |
| Motor Power | 5 HP |
| Motor Speed | 3,450 RPM |
| Power Requirement | 440V |
| Phase | 3 Phase |
| Disc Speed | 3,450 RPM |
| Work Table | Adjustable |
| Application | Industrial metal grinding and finishing |
| Machine Construction | Heavy-duty industrial design |
Grinding Capabilities
The J-4421-4 is designed for general-purpose industrial grinding and finishing tasks. Depending on the abrasive selected, typical applications include:
Removing burrs and sharp edges
Cleaning and preparing weld areas
Removing excess material
Smoothing rough metal surfaces
Edge shaping
Surface preparation
General fabrication and maintenance work
The 20-inch disc provides a broad grinding area, making the machine useful when working with larger components that would be less convenient to handle on a smaller bench grinder.
Electrical Configuration
The J-4421-4 is configured for 440V, 3-phase electrical service. This setup is intended for industrial facilities with compatible three-phase power rather than standard residential electrical systems. Proper installation should be performed according to applicable electrical codes and the machine's manufacturer documentation.
Built for Industrial Work
The JET J-4421-4 is designed around the needs of professional metalworking environments. Its combination of a large grinding disc, high-speed motor, heavy-duty construction, and three-phase power makes it appropriate for shops that regularly perform demanding grinding operations.
The adjustable work area also gives operators greater flexibility when positioning material, helping support controlled grinding and finishing across different types of workpieces.
Ideal Applications
The JET J-4421-4 can be used in:
Metal fabrication shops
Industrial maintenance departments
Machine shops
Manufacturing facilities
Welding and fabrication operations
General-purpose industrial grinding
Production and repair environments
Product Specifications at a Glance
Brand: JET
Model: J-4421-4
Disc Size: 20 inches
Motor: 5 HP
Motor Speed: 3,450 RPM
Electrical: 440V
Phase: 3 Phase
Machine Type: Industrial Disc Grinder
Primary Use: Metal grinding, deburring, shaping, and finishing
Why Choose the JET J-4421-4?
The JET J-4421-4 20 In. Disc Grinder is a substantial industrial machine for shops that need more grinding capacity than a conventional bench grinder can provide. Its large disc, 5 HP motor, and 440V three-phase configuration make it suitable for frequent and demanding metalworking operations.
For fabrication, maintenance, and production environments, the J-4421-4 offers a combination of large working capacity, industrial power, and durable construction in a dedicated disc-grinding platform.