Bridgeport Series I Milling Machine

Features:

For more than 60 years, the Bridgeport Series I Standard Mill - the original, all-purpose mill - has been the "real thing" in milling, drilling, and boring for metalworking shops throughout the world. Today, the Series I Standard continues to fulfill the industry's need for an accurate, reliable, and versatile mill.

The Series I Standard features an innovative airflow cooling design that uses no external fans to prolong bearing life and prevent expansion from heat build-up. A full range of accessories are available, including optional chrome-plated ways and gibs to ensure that the machine will last a lifetime.

SPECIFICATIONS

Range:

• Table Travel (X-Axis) 36 in. (914 mm)
• Saddle Travel (Y-Axis) 12 in. (305 mm)
• Quill Travel 5 in. (127 mm)
• Knee Travel (Z-Axis)* 16 in. (406 mm)
• Ram Travel 12 in. (305 mm)
• Throat Distance (min.) 6.75 in. (171 mm)
• Throat Distance (max.) 18.75 in. (476 mm)
• Table to Spindle Nose Gage Line:
  - (min.) 2.5 in. (64 mm)
  - (max.) 18.25 in. (463 mm)

Table:

• Overall Size 49 x 9 in. (1245 x 299 mm)
• Working Surface 49 x 9 in. (1245 x 229 mm)
• T-slots Centers 3 @ 2.5 in. (64 mm)
• T-slot Size 0.625 in. (16 mm)
• Height above Floor (max.) 47.25 in. (1200 mm)
• Weight of Workpiece (max.) TBD

Spindle (2J Head):

• AC Power Rating:
  - (30 min. duty cycle) 3 hp (2.2 kW)
  - (continuous) 2 hp (1.5 kW)
• Spindle Taper R-8
• Tooling R-8 Collets

Optional Spindle Taper:

• Spindle Taper #30 ISO
• Tool Holder Erickson Quick-Change #30 ISO

Speed Range:

• High (infinitely variable) 500 – 4200 rpm
• Low 60 – 500 rpm
• Power Quill Feed 0.0015 in./rev (0.038 mm)
• Manual Adjust:
  - 0.003 in./rev (0.076 mm)
  - 0.006 in./rev (0.152 mm)

Drilling Capacity:

• Power Quill Feed 3/4 in. (19 mm)
• Milling Capacity (mild steel) 3/4 in. (19 mm)
• Boring Range (mild steel) 6 in. dia. (152 mm)
• Spindle Diameter 1.875 in. (48 mm)
• Quill Diameter 3.375 in. (86 mm)

Positioning:

• Auto (X, Y) 100 ipm (2540 mm/min)
• Manual (X, Y) 100 ipm (2540 mm/min)
• Feedrate Range (X, Y) 0.1 – 35 ipm (2 – 889 mm/min)
• Minimum Increment 0.0001 in. (0.003 mm)

Space and Weight:

• Floor Area:
  - 8.3 x 5.3 ft. (2.53 x 1.62 m)
  - 8.3 x 7.8 ft. (2.53 x 2.4 m)**
• Height 7.04 ft. (2.15 m)
• Net Weight 1930 lb (875 kg)
• Shipping Weight 2075 lb (941 kg)

Power:

• Input Power 208/230/460 volts
• 3 phase, 50/60 cycle
• Power Capacity 4kVA

* Knee travel reduced by 1 in. (25.4mm) with Flood Coolant
** Power case door open

See all accessories for the Bridgeport Series I Milling Machine