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Hardinge Inc.

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Series I

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. 

Hardinge is the only authorized provider
of Bridgeport knee mills, parts and service. Please visit http://www.kneemills.com/ to learn more.

Key features of the Bridgeport Series I Machine:


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Key SpecificationsFeaturesDocuments
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 (Min.):18.75" (476 mm)
Throat Distance (Max.):6.75" (171 mm)
Standard: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)
Spindle (2J Head)
Power Rating 30 min. Duty Cycle:3 hp (2.2 kW)
Power Rating Continuous:2 hp (1.5 kW)
Tooling:R-8 Collets
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)
Speed Range
High (Infinitely Variable):500-4200 rpm
Low: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)
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)

Standard Features

  • One-Shot lubrication system
  • Chrome-Plated Ways and Gibs
  • Color Machine Tool Gray

Optional Features

  • 2-Axis Digital Readout
  • Power Drawbar for R-8 or #30 Quick-Change Spindle
  • Flood Coolant System
  • Splashbacks and Chip Pan
  • Worklight
  • Electrics—NFPA/NEMA-12 Standards, UL listed
Document NumberDescriptionFile Size
 2383  Bridgeport Rotary Solutions2.4mb

Hardinge Inc.
One Hardinge Drive
Elmira, NY 14902
©2011 Hardinge Inc. All Rights Reserved.
Hardinge is the leader in providing a wide range of highly reliable turning, milling, grinding and workholding solutions under the brands Hardinge, Bridgeport, Kellenberger, Hauser, Tripet and Tschudin. We never compromise on product design, so customers can count on Hardinge to help them make the right part to the required specification, every time.