Difference between revisions of "Bridgeport Mill"
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+ | Generally used to machine flat surfaces, this mill can produce irregular surfaces, drill, bore, cut gears, and cut slots. This milling machine is a vertical spindle machine with a swiveling head. | ||
+ | |||
+ | '''Safety''' | ||
+ | * Do not make contact with the revolving cutter. | ||
+ | * Place a wooden pad or suitable cover over the table surface to protect it from possible damage. | ||
+ | * Use the buddy system when moving heavy attachments. | ||
+ | * Do not attempt to tighten arbor nuts using machine power. | ||
+ | * When installing or removing milling cutters, always hold them with a rag to prevent cutting your hands. | ||
+ | * While setting up work, install the cutter last to avoid being cut. | ||
+ | * Never adjust the work piece or work mounting devices when the machine is operating | ||
+ | * Chips should be removed from the work piece with an appropriate rake and a brush. | ||
+ | * Shut the machine off before making any adjustments or measurements. | ||
+ | * When using cutting oil, prevent splashing by using appropriate splash guards. Cutting oil on the floor can cause a slippery condition that could result in operator injury. | ||
+ | |||
+ | |||
+ | '''Fixture''' | ||
+ | |||
+ | |||
+ | '''Cutting Speed''' | ||
+ | To know what speed to run the mill you must know: | ||
+ | * The type of material you are cutting (steel, aluminum, brass, etc) | ||
+ | * The type of cutter you are using (HSS or Carbide) | ||
+ | * The diameter of the cutter | ||
+ | SFM (Surface Feet per Minute) | ||
+ | {| class="wikitable" | ||
+ | |- | ||
+ | ! Material | ||
+ | ! HSS (High Speed Steel) | ||
+ | ! Carbide | ||
+ | |- | ||
+ | | Aluminum | ||
+ | | 600 | ||
+ | | 800 | ||
+ | |- | ||
+ | | Brass | ||
+ | | 175 | ||
+ | | 175 | ||
+ | |- | ||
+ | | Delrin | ||
+ | | 400 | ||
+ | | 800 | ||
+ | |- | ||
+ | | Polycarb | ||
+ | | 300 | ||
+ | | 500 | ||
+ | |- | ||
+ | | Stainless Steel | ||
+ | | 80 | ||
+ | | 300 | ||
+ | |- | ||
+ | | Steel | ||
+ | | 70 | ||
+ | | 350 | ||
+ | |} | ||
+ | |||
+ | '''Suggested RPM''' | ||
+ | SFPM X 3.82 / Tool Diameter | ||
+ | |||
+ | Example: | ||
+ | You are cutting Aluminum with a 3/8" HSS end cutter | ||
+ | |||
+ | 600 x 3.82 / 0.375 = 6112 | ||
+ | or | ||
+ | Set the mill to '''6000 RPMS''' |
Revision as of 14:56, 12 January 2019
[Equipment|Back to list of Equipment]]
General
|
Generally used to machine flat surfaces, this mill can produce irregular surfaces, drill, bore, cut gears, and cut slots. This milling machine is a vertical spindle machine with a swiveling head.
Safety
- Do not make contact with the revolving cutter.
- Place a wooden pad or suitable cover over the table surface to protect it from possible damage.
- Use the buddy system when moving heavy attachments.
- Do not attempt to tighten arbor nuts using machine power.
- When installing or removing milling cutters, always hold them with a rag to prevent cutting your hands.
- While setting up work, install the cutter last to avoid being cut.
- Never adjust the work piece or work mounting devices when the machine is operating
- Chips should be removed from the work piece with an appropriate rake and a brush.
- Shut the machine off before making any adjustments or measurements.
- When using cutting oil, prevent splashing by using appropriate splash guards. Cutting oil on the floor can cause a slippery condition that could result in operator injury.
Fixture
Cutting Speed
To know what speed to run the mill you must know:
- The type of material you are cutting (steel, aluminum, brass, etc)
- The type of cutter you are using (HSS or Carbide)
- The diameter of the cutter
SFM (Surface Feet per Minute)
Material | HSS (High Speed Steel) | Carbide |
---|---|---|
Aluminum | 600 | 800 |
Brass | 175 | 175 |
Delrin | 400 | 800 |
Polycarb | 300 | 500 |
Stainless Steel | 80 | 300 |
Steel | 70 | 350 |
Suggested RPM SFPM X 3.82 / Tool Diameter
Example: You are cutting Aluminum with a 3/8" HSS end cutter
600 x 3.82 / 0.375 = 6112 or Set the mill to 6000 RPMS