Series I

About Manual Mills

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.

Key Specifications

Floor Space
8.2 x 5.3 ft (2.5 x 1.6 m)
Machine height
7.04 ft (2.15 m)
Mass of Machine

1950 lb (885 kg)
2095 lb (950 kg) (Shipping)

49 x 9" (1245 x 299 mm)
T Slot center distance
3 @ 2.5" (64 mm) centers
T-Slot Size
0.625" (16 mm)
Height Above Floor (Max.)
47.25" (1200 mm)
Weight of Workpiece (Max.)
750 lb (340 kg)
Speed Range
High (Infinitely Variable)
500-4200 rpm
60 - 500 rpm
Power Quill Feed
0.0015"/rev (0.038 mm)
Manual Adjust
0.003"/rev (0.076 mm)
0.006"/rev (0.152 mm)
Drilling Capacity
Power Quill Feed 3
3/4" Dia. (19 mm)
Manual Drilling Capacity
3/4" (19 mm) Mild Steel
Boring Range
6" (152 mm) Mild Steel
Spindle Diameter
1.875 in (48 mm)
Quill Diameter
3.375" (86 mm)
Spindle (2J Head)
Power Rating 30 min. Duty Cycle
3 hp (2.2 kW)
Power Rating Continuous
2 hp (1.5 kW)
R-8 Collets
Table travel (X-Axis)
36" (914 mm)
Saddle Travel (Y-Axis)
12" (305 mm)
Quill Travel
5" (127 mm)
Knee Travel (Z-Axis)
16" (406 mm)
Ram Travel
12" (305 mm)
Throat Distance (Max.)
6.75" (171 mm)
Throat Distance (Min.)
18.75" (476 mm)

Product Description

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.  Hardinge is the only authorized provider of Bridgeport knee mills, parts and service. Please visit to learn more. Key features of the Bridgeport Series I Machine:

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