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Jet Geared Head Mill Drill with Power Downfeed and DRO
- $4,073.00
- Brands JET
- Product Code: 351143
- Availability: In Stock
JET Geared Head Mill/Drill with Power Downfeed, Newall DP700 2-Axis DRO & X-Powerfeed Product Overview The JET Geared Head Mill/Drill with Power Downfeed, Newall DP700 2-Axis DRO, and X-Powerfeed is a heavy-duty metalworking machine designed for precision drilling, milling, boring, and general machining. This configuration combines a 6-speed geared head, automatic power downfeed, X-axis powe..
Features of Jet Mill Drill With Newall DP700 Two Axis DRO and X Powerfeed
JET Geared Head Mill/Drill with Power Downfeed, Newall DP700 2-Axis DRO & X-Powerfeed
Product Overview
The JET Geared Head Mill/Drill with Power Downfeed, Newall DP700 2-Axis DRO, and X-Powerfeed is a heavy-duty metalworking machine designed for precision drilling, milling, boring, and general machining. This configuration combines a 6-speed geared head, automatic power downfeed, X-axis powerfeed, and Newall DP700 2-axis digital readout to give operators greater control over spindle movement and table positioning.
The JET JMD-45GHPF, Item No. 351153, uses a rigid square-column design with dovetail ways, an R8 spindle, and a 1.5 HP single-phase motor. Its 9-1/2 x 32-1/4-inch table and 20-1/2-inch longitudinal travel provide a substantial work area for professional machining applications.
Key Features
- Heavy-duty square-column construction with dovetail ways.
- 6-speed geared head delivers full mechanical power to the cutting tool.
- Power downfeed provides controlled automatic quill movement.
- X-axis powerfeed automates longitudinal table movement.
- Newall DP700 2-axis DRO provides digital position feedback.
- R8 spindle taper accepts a broad range of milling tooling.
- Head tilts 90° left and right for angled machining.
- Quick-select gear levers allow rapid spindle-speed changes.
- Built-in calibrated fine downfeed for precise manual adjustments.
- Internal depth gauge provides convenient drilling-depth reference.
- Forward/reverse spindle switch.
- Spindle guard and work lamp included.
- 1.5 HP, 115/230V, single-phase motor.
- CSA/CUS certified configuration.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | JET |
| Model | JMD-45GHPF |
| Item Number | 351153 |
| Machine Type | Geared-head square-column mill/drill |
| Powerfeed | X-Axis Powerfeed |
| Digital Readout | Newall DP700 2-Axis DRO |
| Drilling Capacity | 1-1/2 in. |
| Face Mill Capacity | 4 in. |
| End Mill Capacity | 3/4 in. |
| Swing | 19-11/16 in. |
| Maximum Spindle-to-Table Distance | 18-1/8 in. |
| Spindle Taper | R8 |
| Spindle Travel | 5 in. |
| Quill Diameter | 3 in. |
| Column Size | 7-7/8 x 7-5/8 in. square |
| Number of Spindle Speeds | 6 |
| Spindle Speed Range | 65–1,550 RPM |
| Table Size | 9-1/2 x 32-1/4 in. |
| Longitudinal Table Travel | 20-1/2 in. |
| Cross Travel | 8-1/4 in. |
| T-Slots | 4 x 5/8 in. |
| Base Dimensions | 26-11/16 x 15-15/16 in. |
| Overall Dimensions | 29 x 36 x 50 in. |
| Motor | 1.5 HP |
| Voltage | 115/230V |
| Phase | 1 Phase |
| Approx. Machine Weight | 820 lb. |
| Stand Included | No |
These specifications correspond to JET Item 351153 / Model JMD-45GHPF.
Geared-Head Drive
The 6-speed geared head provides direct mechanical power transmission to the spindle. Six selectable speeds from 65 to 1,550 RPM allow the operator to match spindle speed to the cutter, workpiece material, and machining operation.
The mechanical gear drive is particularly useful for applications where consistent spindle torque is important, including heavier drilling and milling operations.
Power Downfeed
The built-in power downfeed automatically moves the spindle during drilling and boring operations. This helps maintain a more consistent feed rate and reduces the need for continuous manual quill control.
It is useful for:
- Repetitive drilling
- Boring
- Counterboring
- Controlled-depth machining
- Production-oriented work
- Consistent hole-making
A calibrated fine downfeed is also provided when more precise manual spindle adjustment is required.
X-Axis Powerfeed
The integrated X-axis powerfeed automates longitudinal table movement across the approximately 20-1/2-inch X-axis travel.
Power-assisted table movement can make longer milling passes smoother and less demanding for the operator. It is particularly helpful for:
- Face milling
- Long edge cuts
- Repetitive passes
- Surface machining
- Consistent material removal
The operator should select an appropriate table-feed rate based on cutter diameter, material, depth of cut, and tooling specifications.
Newall DP700 2-Axis DRO
The Newall DP700 2-axis digital readout provides digital position information for the machine's table axes.
The DRO can make it easier to:
- Locate hole patterns.
- Position slots and pockets.
- Repeat machining dimensions.
- Monitor X/Y table movement.
- Return to established positions.
- Reduce dependence on manually reading graduated scales.
Combined with the X-axis powerfeed, the DRO gives the operator both digital positioning feedback and powered longitudinal table movement.
Square-Column Construction
The machine uses a rigid square column with dovetail ways, providing a stable structure for the head and spindle assembly. This configuration is designed to withstand the cutting forces associated with demanding drilling and milling operations.
The design is well suited to:
- Face milling
- End milling
- Slotting
- Boring
- Drilling
- Counterboring
- General material removal
R8 Spindle
The R8 spindle taper is a widely used milling-machine tooling standard. It allows the machine to accept a broad range of compatible milling accessories.
Published capacities include:
- 1-1/2-inch drilling
- 4-inch face milling
- 3/4-inch end milling
Actual cutting capacity depends on the material, cutter geometry, spindle speed, feed rate, depth of cut, and workholding.
Tilting Head
The milling head tilts 90° left and 90° right, allowing the spindle to be positioned for angular machining operations.
This flexibility can be useful for:
- Angled holes
- Beveled surfaces
- Angular milling
- Specialized fixtures
- Non-standard machining setups
The head should always be securely locked before beginning a cutting operation.
Worktable and Travel
The machine is equipped with a 9-1/2 x 32-1/4-inch table. The table provides approximately 20-1/2 inches of longitudinal travel and 8-1/4 inches of cross travel. Four 5/8-inch T-slots provide mounting points for compatible vises, clamps, and fixtures.
The substantial table size makes the machine suitable for a broad range of workpieces while providing enough travel for longer milling operations.
Motor and Electrical System
A 1.5 HP single-phase motor powers the machine. It is configured for 115/230V operation, providing flexibility for workshops with compatible electrical service.
The machine should be wired for the appropriate voltage before operation. Electrical installation should comply with JET's requirements and applicable local electrical codes.
Typical Applications
The JET mill/drill is suitable for:
- Professional machine shops
- Fabrication
- Maintenance machining
- Equipment repair
- Tool rooms
- Prototype development
- Small-batch production
- General metalworking
- Industrial maintenance
Its combination of powerfeed, digital position feedback, and geared-head drive makes it particularly useful for machining applications where repeatability and operator control are important.
Common Machining Operations
Drilling
Produce holes using suitable drills and controlled power downfeed.
Milling
Remove material from surfaces, edges, and workpiece features using compatible milling cutters.
Boring
Enlarge and finish existing holes with controlled spindle movement.
Face Milling
Machine flat surfaces using an appropriate face mill and X-axis powerfeed.
Slotting
Create channels and slots using suitable end mills.
Counterboring
Produce stepped holes for fasteners and other components.
Angled Machining
Use the tilting head for appropriate angular operations.
Benefits for Professional Users
Integrated Powerfeeds: Power downfeed controls spindle movement while the X-axis powerfeed automates longitudinal table travel.
Digital Position Feedback: The Newall DP700 DRO makes table positioning easier to monitor and repeat.
Rigid Construction: The square column and dovetail ways provide a stable machining platform.
Geared-Head Power: Six spindle speeds provide useful mechanical torque for drilling and milling.
R8 Compatibility: The R8 spindle supports a wide selection of standard milling tooling.
Large Worktable: The 9-1/2 x 32-1/4-inch table accommodates a broad range of fixtures and workpieces.
Maintenance
Regular maintenance helps preserve machine accuracy and extend service life.
Inspect and maintain:
- Spindle and bearings
- Gear head
- Quill and power-downfeed mechanism
- X-axis powerfeed
- Column and dovetail ways
- Table and T-slots
- Lead screws
- DRO scales and cables
- Electrical connections
- Lubrication points
Clean chips from the table and ways after machining. Keep the DRO scales protected from metal chips, coolant, and other contaminants. Follow JET's recommended lubrication and maintenance procedures.
Safety Considerations
Always wear appropriate eye protection and use additional PPE required for the material and machining operation.
Secure workpieces firmly with a suitable vise, clamp, or fixture. Never hold material by hand while drilling or milling.
Keep hands, loose clothing, jewelry, and hair away from rotating tooling and moving table components.
Do not measure, adjust, reposition the workpiece, or remove chips while the spindle is rotating.
Before servicing the machine or working on electrical or mechanical components, disconnect it from the power supply.
Why Choose the JET Geared Head Mill/Drill?
The JET Geared Head Mill/Drill with Power Downfeed, Newall DP700 2-Axis DRO, and X-Powerfeed combines several productivity-focused features in one professional machining platform.
Its 6-speed geared head, 1.5 HP motor, R8 spindle, automatic power downfeed, X-axis powerfeed, Newall DP700 DRO, rigid square column, large worktable, and tilting head make it well suited for users who need greater control and repeatability for drilling, milling, boring, surface machining, and general metalworking operations.