Manual Mill¶
About¶
A manual mill, or milling machine, is used to precisely machine parts by removing material. It can cut various materials, especially metals, and is commonly used for shaping, drilling, and slotting.
Setup¶
- Choose the correct end mill, drill bit, or cutting tool for the task and material.
- Place the tool in the spindle and secure it using the appropriate chuck or collet. Tighten with a wrench as needed.
- Secure the workpiece firmly to the table using a vice, clamps, or a fixture.
- Zero your X and Y positions based on the reference points of the workpiece.
DRO
Our JET mill is equipped with a DRO, or digital read-out, which provides an indicator on where the X and Y axes are with high accuracy. There is no Z position, though!
Usage¶
- Power on the mill and set the spindle to the correct speed for the material and tool size.
- Bring the tool into contact with the workpiece, advancing slowly and carefully to avoid sudden impact.
- Use the hand wheels to control the movement and feed rate, applying steady pressure.
- Periodically stop to clear chips and debris from the cutting area. Use an air blower or brush - never use hands, since there are often sharp metal splinters.
- Apply cutting fluid if required, especially for thicker metal or steel, to reduce heat and friction.
- Turn off the machine once the operation is complete and wait for the spindle to come to a full stop.
Cleanup¶
- Sweep or vacuum chips and debris for the next user.
- Return end mills, bits, and accessories to their proper location.
- Wipe down the mill table, vise, and any surfaces with chips or coolant residue.
Troubleshooting¶
| Issue | Action |
|---|---|
| Tool or part chatters | Ensure the tool is secured tightly, adjust feed rate or reduce speed, and check that the workpiece is properly clamped. |
| Poor finish | Check that the cutting tool is sharp and appropriate for the material. Adjust speed and feed rate as needed. |
| Excessive heat / smoking | Reduce speed, apply cutting fluid, or take lighter cuts to avoid overheating the tool and material. |
Safety Guidelines¶
| Symbol | Description |
|---|---|
 |
Closed-Toe Shoes Required |
 |
Eye Protection Required |
 |
Hearing Protection As Needed |
 |
Tie Back Long Hair / Loose Clothes Required |
- Ensure the workpiece is clamped firmly to prevent movement during milling.
- Use sharp, appropriate tools to improve finish and safety.
- Keep hands and body parts away from the rotating tool and cutting area.
- Allow the spindle to come to a complete stop before adjusting or removing the workpiece.