Specifications:
Table travel (X-Axis) 36”
Saddle Travel (Y-Axis) 12”
Quill Travel 5”
Knee Travel (Z-Axis) 16”
Ram Travel 12”
Throat Distance (Min.) 18.75”
Throat Distance (Max.) 6.75”
Standard 48” x 9”
T Slot center distance 3 @ 2.5” centers
T-Slot Size 0.625”
Cast Iron: 3/4"
Steel: 5/8"
Face Mill: 3"
End Mill: 3/4"
Spindle Taper: R8 Or Nt-30
Quill Diameter: 3-3/8"
Collet Capacity: 1/8" To 5/8"
Varaiable Spindle Speed: 60 To 4200 Rpm
Spindle Feeds: 0015, .0003, .0006 Inch/Rev
Spindle To Column: 5" To 17-3/8"
Motor: 3 Hp
Bridgeport Base
Table Size 9" x 42" or 9" x 49"
X-Axis Travel ~30"
Y-Axis Travel ~12"
Knee Travel (Z-axis) ~16"
Quill Travel ~5"
Spindle Taper R8
Manual Feeds X, Y, and Z via hand cranks
Power Feed (optional) May be installed on X-axis (varies by configuration)
Construction Cast iron for vibration dampening and rigidity
Acra Milling Head Specifications
Spindle Motor 2 HP, 3-phase, 220/440V
Spindle Speed Range 60–4,500 RPM (variable speed)
Spindle Taper R8
Quill Feed 3-speed power downfeed (0.0015, 0.003, 0.006 in/rev)
Head Tilt ±90° left/right, ±45° front/back
Construction Meehanite cast iron head casing
Description:
Bridgeport-style vertical knee mill base that has been retrofitted with an Acra head—a fairly common and practical combination in machine shops when upgrading or repairing old Bridgeport machines.
Machine Overview
Base Machine: Bridgeport Vertical Knee Mill (Manual Mill Base)
Head: Acra Variable Speed Milling Head (Likely AM-2V or AM-2S)
Description – What It Does
This machine is a manual vertical milling machine used to:
• Cut, shape, and drill metal or plastic parts
• Perform tasks like face milling, slotting, keyway cutting, hole drilling, and contouring
• Handle prototype work, maintenance jobs, and precision machining of small to medium-sized parts
The Bridgeport base provides stability and smooth table movement, while the Acra milling head brings modern, reliable power and speed control.
Bridgeport Base Specifications (Typical)
Feature: Spec
Table Size: 9" x 42" or 9" x 49" (depends on model)
X-Axis Travel: ~30"
Y-Axis Travel: ~12"
Knee Travel (Z-axis): ~16"
Quill Travel :~5"
Spindle Taper: R8
Manual Feeds: X, Y, and Z via hand cranks
Power Feed (optional): May be installed on X-axis (varies by configuration)
Construction: Cast iron for vibration dampening and rigidity
Acra Milling Head Specifications (Assuming AM-2V or AM-2S)
Feature: Spec
Spindle Motor: 2 HP, 3-phase, 220/440V
Spindle Speed Range: 60–4,500 RPM (variable speed)
Spindle Taper: R8
Quill Feed: 3-speed power downfeed (0.0015, 0.003, 0.006 in/rev)
Head Tilt: ±90° left/right, ±45° front/back
Construction: Meehanite cast iron head casing
Capabilities
• Precision manual milling for small to medium parts
• Versatile use in maintenance, R&D, toolrooms, and prototyping
• Cuts steel, aluminum, plastics, and more with correct tooling
• Customizable with power feeds, DROs, or coolant systems
Listing Summary Description
Bridgeport Vertical Milling Machine with Acra 2 HP Head — This machine features the classic, rigid Bridgeport knee mill base with a modern, variable-speed Acra head retrofit. Ideal for precision manual milling, drilling, and light-duty shaping in maintenance or job shop environments. 9" x 42" table, R8 spindle taper, and 2 HP head with 60–4,500 RPM speed range.
Additional Prep Fees May Apply
