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With over 370,000 machines built over the past 70 years and counting, the Bridgeport® Series 1 Standard Knee Mill is the most popular milling, drilling and boring machine available and continues to fulfill the industry’s need for an accurate, reliable, and versatile mill.
| SERIES 1 | SERIES 1 CNC | |
| X-Axis Table Travel | ||
| Without Power Feed | 36" (914mm) | N/A |
| With Power Feed | 33" (838mm) | 33" (838mm) |
| Y Axis Travel | ||
| Without Power Feed | 12" (306mm) | |
| With Power Feed | 12" (306mm) | |
| Quill Travel | 5" (127mm) | |
| Knee Travel | 16" (406mm) | |
| Ram Travel | 12" (306mm) | |
| Throat Distance | ||
| Min | 6.75" (171mm) | |
| Max | 18.75" (476mm) | |
| Table to Spindle Nose | ||
| Min | 2.5" (64mm) | |
| Max | 18.25" (463mm) | |
| TABLE | ||
| Overall Size | 9" x 49" (299 x 1245mm) | |
| Working Surface | 9" x 49" (299 x 1245mm) | |
| Number of T-Slots | 3 | |
| T-Slot Centers | 2.5" (64mm) | |
| T-Slot Size | 0.625" (16mm) | |
| Height Above Floor Maximum | 47.25" (1200mm) | |
| Weight of Workpiece Maximum | 750lbs. (340kgs) | |
| SPINDLE CONSTRUCTION | ||
| Spindle Diameter | 1.875" (48mm) | |
| Quill Diameter | 3.375" (86mm) | |
| SPINDLE MOTOR HP | ||
| 30 Min Duty Rated | 3Hp | |
| Continuous | 2HP | |
| SPINDLE TAPER | ||
| Standard | R-8 | |
| Optional | NMTB30 | |
| SPINDLE SPEED RANGE | ||
| Low Range | 60 - 500 RPM | |
| High Range | 500 - 4200 RPM | |
| QUILL FEED RANGE (3) | and 2 Axis CNC | 3 Axis CNC |
| Range #1 | 0.0015 "/rev | Program Range |
| Range #2 | 0.003"/rev | 0-100 IPM |
| Range #3 | 0.006"/rev | |
| MACHINING CAPACITIES | ||
| Power Quill Feed Drilling (mild steel) | 3/8" (9.5mm) | |
| Miling (mild steel) | 2 CI/min | |
| Boring Range (mild steel) | 6" Dia (152mm) | |
| POSITIONING | ||
| Feedrate Range | N/A | 0-100 IPM |
| Minimum Increment | N/A | 0.0001" |
| SPACE AND WEIGHT | ||
| Floor Area | 84" x 120" (2140 x 3048mm) | |
| Height | 87" (2210mm) | |
| Net Weight | 1930lbs (875kgs) | |
| Shipping Weight | 2075lbs (941kgs) | |
| MACHINING CAPACITIES | 208/230/460 | |
| Input Power | 208/230/460 | 3 phase 50/60 cycle |
| 3 phase 50/60 cycle | 110/1/60 for Control | |
| Power Capacity | 4 KVA | 4 KVA / 15Amp CTRL |
The Bridgeport Series I Standard Mill is the original milling, drilling and boring machine. The Bridgeport Series I Knee Mill is the most popular mill ever made with over 370,000 machines built over the past 70-plus years.
Standard Features
Innovative airflow cooling design that eliminates the need for external fans to prolong bearing life and prevent expansion from heat build-up.
One-Shot Lubrication System Chrome-Plated Ways and Gibs Color—Machine Tool Gray
Optional Features
2 or 3-Axis Digital Readout
Power Drawbar for R-8 or #30 Quick-Change Spindle Worklight Electrics—NFPA/NEMA-12 Standards, optional NRTL testing
A full range of accessories are available, including optional chrome-plated ways and gibs, to ensure that the machine will last a lifetime.
The Bridgeport Series I Standard Knee Mill is the single most ubiquitous milling, drilling, and boring machine in the world. It can be found in job shops across the globe serving in countless capacities.
