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Jet JTM 4VS-1 Vertical Milling Machine
- $5,853.00
- Brands JET
- Product Code: 690197
- Availability: In Stock
JET JTM-4VS-1 Vertical Milling MachineThe JET JTM-4VS-1 Vertical Milling Machine is a versatile manual knee mill designed for machining shops, maintenance departments, fabrication facilities, and experienced metalworkers who need reliable milling, drilling, and boring capability. Its rigid knee-mill construction and variable-speed spindle provide the flexibility needed for a wide range of machinin..
Vertical Milling Machine for Precision Metalworking and Machining
JET JTM-4VS-1 Vertical Milling Machine
The JET JTM-4VS-1 Vertical Milling Machine is a versatile manual knee mill designed for machining shops, maintenance departments, fabrication facilities, and experienced metalworkers who need reliable milling, drilling, and boring capability. Its rigid knee-mill construction and variable-speed spindle provide the flexibility needed for a wide range of machining operations.
The machine combines a 1-1/2 HP motor, R-8 spindle taper, and a 60–4,200 RPM variable-speed spindle with an 8 x 32-inch worktable. The milling head can be tilted for angled machining, while the quill provides controlled spindle movement for drilling and boring work.
Key Features
1-1/2 HP motor — Provides dependable power for general-purpose milling and drilling.
Variable-speed spindle — Offers a broad 60–4,200 RPM range for adapting spindle speed to tooling and material.
R-8 spindle taper — Accepts a wide selection of commonly available R-8 milling accessories and tooling.
8 x 32-inch worktable — Provides a practical work surface for fixtures, vises, and medium-sized workpieces.
Knee-type construction — Provides rigid support while allowing substantial vertical table adjustment.
Tilting milling head — Allows the spindle to be positioned for angled milling and drilling.
Quill feed — Provides controlled spindle movement for drilling, boring, and similar operations.
Quill depth stop — Helps maintain consistent drilling or boring depths.
Turret and swivel head — Provides additional flexibility when positioning the milling head.
Spindle brake — Helps stop the spindle quickly after machining operations.
Chrome-plated quill — Provides a durable surface for repeated quill movement.
Way covers — Help protect critical slideways from chips and debris.
Manual operation — Provides direct control over table and spindle movement for custom machining work.
Floor-standing design — Provides a stable platform for workshop and production environments.
Product Specifications
| Specification | Details |
|---|---|
| Brand | JET |
| Model | JTM-4VS-1 |
| Machine Type | Vertical Milling Machine |
| Configuration | Knee Mill |
| Motor Power | 1-1/2 HP |
| Motor Type | Variable-speed |
| Voltage | 115/230 V |
| Phase | 1 Phase |
| Spindle Taper | R-8 |
| Spindle Speed Range | 60–4,200 RPM |
| Table Size | 8 x 32 in. |
| Longitudinal Table Travel (X-Axis) | Approximately 15-1/2 in. |
| Cross Table Travel (Y-Axis) | Approximately 12 in. |
| Knee Travel (Z-Axis) | Approximately 15 in. |
| Quill Travel | Approximately 5 in. |
| Quill Diameter | Approximately 3-3/8 in. |
| Spindle-to-Table Clearance | Approximately 18 in. |
| Head Tilt | Approximately 90° left/right |
| T-Slot Size | 5/8 in. |
| Machine Type | Floor standing |
| Application | Milling, drilling, boring and general machining |
Specifications can vary depending on production revision and electrical configuration. Confirm the latest JET documentation for exact dimensions, table travel, electrical requirements, and supplied accessories before purchase.
Variable-Speed Spindle
The JTM-4VS-1 features a variable-speed spindle with a range of 60 to 4,200 RPM. Instead of being restricted to a fixed set of belt-driven speeds, the operator can adjust the spindle speed to better match the cutter diameter, material, and machining operation.
Lower speeds are useful for larger cutters and applications requiring slower cutting rates, while higher speeds can be selected for smaller cutters and finishing operations.
This broad speed range makes the machine suitable for a variety of machining tasks without requiring frequent mechanical speed changes.
R-8 Spindle Taper
The R-8 spindle taper is widely used on manual knee mills and provides compatibility with a broad range of milling tooling.
Depending on the operation, the spindle can be equipped with suitable R-8 collets, arbors, end-mill holders, drill chucks, and other accessories. This gives the JTM-4VS-1 flexibility for both milling and drilling operations.
8 x 32-Inch Worktable
The machine is equipped with an 8 x 32-inch worktable, providing ample space for mounting a vise, fixtures, rotary table, or workpiece.
The table provides approximately 15-1/2 inches of longitudinal travel and 12 inches of cross travel, allowing the operator to position the workpiece accurately beneath the cutter.
The knee provides additional vertical movement, while the quill can be used when a more controlled spindle movement is required.
Tilting and Swiveling Head
The milling head can be tilted to accommodate machining operations that require the spindle to be positioned away from the standard vertical orientation.
This capability is useful for:
Angled milling
Bevel machining
Inclined surfaces
Angular drilling
Specialized slotting
Custom machining operations
The head can be returned to its standard position for conventional vertical milling.
Quill Feed and Depth Control
The JTM-4VS-1 incorporates a quill feed mechanism that allows the spindle to move vertically without repositioning the entire knee.
This is particularly useful for drilling and boring operations, where controlled spindle movement is needed. The integrated depth-control system helps establish repeatable drilling depths for multiple holes.
Knee-Mill Construction
The JTM-4VS-1 uses a traditional knee-and-column design. The table is supported by a rigid knee that can be raised or lowered along the column.
This configuration provides a stable work platform and allows the operator to adjust the relationship between the workpiece and spindle for different machining setups.
The substantial cast construction is intended to help minimize unwanted movement during cutting and maintain consistent machining performance.
Practical Manual Machining
As a manual milling machine, the JTM-4VS-1 gives the operator direct control over table positioning, spindle speed, quill movement, and cutting operations.
This makes it particularly useful for:
One-off components
Repair parts
Prototypes
Toolroom work
Maintenance machining
Small production runs
Custom fabrication
It is also a practical choice for workshops that do not require CNC automation but still need accurate milling capability.
Recommended Applications
The JET JTM-4VS-1 is suitable for:
General metal milling
Drilling
Boring
Facing
Slotting
Keyway machining
Prototype production
Machine repair
Toolroom work
Maintenance departments
Fabrication shops
Small-batch machining
Why Choose the JET JTM-4VS-1?
The JET JTM-4VS-1 Vertical Milling Machine provides a useful combination of power, spindle-speed flexibility, and traditional knee-mill versatility. Its 1-1/2 HP motor, 60–4,200 RPM variable-speed spindle, R-8 taper, 8 x 32-inch table, tilting head, and controlled quill feed make it capable of handling a broad range of machining operations.
For workshops that need a dependable manual milling platform for milling, drilling, boring, repair work, prototyping, and general metal fabrication, the JTM-4VS-1 offers a practical balance between machine capacity, operator control, and versatility.