USED CINCINNATI MILLING MACHINE CO #3

Specifications:
Cincinnati No. 3 Vertical Milling Machine – Serial 4A3V5A-7

Manufacturer: The Cincinnati Milling Machine Co., Cincinnati, Ohio, USA
Year Built: 1953
Electrical: 440V, 3-phase, 60 Hz (Control voltage: 110V AC)
Type: Heavy-Duty Knee-Type Vertical Milling Machine – Dial-Type

Specifications

Table size: 62.5" × 15.25"(T-slotted)
Longitudinal travel: ~34"
Cross travel: ~12"
Vertical (knee) travel: ~20"
Spindle taper: NMTB 50
Spindle speed range: ~15 – 1,500 RPM (16-step Dial Selector)
Spindle motor: ~10 HP AC
Feed rates: 0.5 – 20 in/min (power feed)
Rapid traverse speeds: Longitudinal ~100 IPM, Cross ~100 IPM, Vertical ~80 IPM
Machine weight: ~9,500 – 10,500 lbs
Floor space: ~8.5 ft × 9 ft

Key Features

Dial-type speed selection for quick spindle changes
Heavy-duty gear-driven feeds on all axes
Rapid traverse to reduce non-cutting time
Rigid overarm and spindle support for heavy cuts
Large table capacity for big work pieces and multiple setups
50 taper spindle for high torque tooling

Typical Applications

Mold and die base machining
Large fixture and plate milling
Production roughing and finishing
Heavy steel plate slotting and facing
General precision milling for large parts

Serial 4A3V5A-7

“4A3V” = No. 3 Vertical, High-Speed Dial-Type, Model OM. This code maps to Cincinnati’s No. 3 vertical dial-type mill.
“5A” = order booked in 1953. In Cincinnati’s code, 5A corresponds to 1953 (post-1952 scheme). The digits before the dash give the year code.
“-7” indicates the sequence within that lot (the 7th machine of that booking).

Description:
⚙️ Key Specifications

• Manufacturer: The Cincinnati Milling Machine Co., Cincinnati, OH, USA

• Model: No. 3 Vertical Milling Machine – Dial-Type

• Serial Number: 4A3V5A-7

• Year Built: 1953

• Electrical: 440V, 3-phase, 60 Hz (110V control)

• Table Size: 62.5" × 15.25" (T-slotted)

• Longitudinal Travel: ~34"

• Cross Travel: ~12"

• Vertical (Knee) Travel: ~20"

• Spindle Taper: NMTB 50

• Spindle Speed Range: ~15 – 1,500 RPM (16-step dial selector)

• Spindle Motor: ~10 HP AC

• Feed Rates: 0.5 – 20 in/min (power feed)

• Rapid Traverse Speeds: Longitudinal ~100 IPM, Cross ~100 IPM, Vertical ~80 IPM

• Weight: ~9,500 – 10,500 lbs

• Floor Space: ~8.5 ft × 9 ft

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🔧 Functions & Capabilities

• Precision milling of large and heavy work pieces

• All-axis power feeds for consistent, smooth cutting

• Quick spindle speed changes via dial-type selector

• Heavy-duty 50 taper spindle for large-diameter tooling

• Capable of face milling, slotting, drilling, boring, and profiling

• Handles both ferrous and non-ferrous metals

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💡 Common Applications

• Machining mold and die bases

• Milling large plates and fixtures

• Slotting and facing heavy steel sections

• Precision boring and profiling of industrial components

• Production runs requiring repeatable accuracy

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🏭 Used In Industries Like

• Metal fabrication

• Tool and die making

• Heavy equipment manufacturing

• Aerospace and defense

• Energy and power generation

• Shipbuilding

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📌 Summary Description

The Cincinnati No. 3 Vertical Milling Machine is a robust, industrial-grade milling solution built for precision and power. With its large table capacity, rigid frame, and quick-change dial-type speed system, it excels in demanding production environments. Its versatility, heavy-duty construction, and 50 taper spindle make it an ideal choice for machining large, high-tolerance parts in a variety of industries.

The Cincinnati No. 3 Vertical is a large-capacity, production-grade milling machine designed for heavy metal removal and precision machining on large workpieces. Its dial-type speed selector allows rapid changes in spindle RPM without belt changes. The robust knee and saddle construction provide high rigidity for both roughing and finishing cuts. This model was widely used in toolrooms, fabrication shops, and manufacturing plants for large part milling, mold bases, and fixture work.

Specifications:

54" x 12" Table
ISO 50 Spindle Taper
20-500 RPM Spindle Speed in 16 Speeds Power Feed
Electrics: 220 Volt, 3 Phase
Manufacturer: Cincinnati Model: 2
Serial: 7032
Table Size: 16-1/4" X 79-3/4"
Table Travel: 28" (X), 12" (Y), 16" (Z)
Saddle Travel: 16"
Taper In Spindle: #50
Spindle Rpm: 16–21 steps, 15 to 1500 RPM
Feeds: Power feeds in X, Y, Z
Motor: 5–7.5 HP
Dual handwheel + power feed levers on the saddle and knee
Knee crank and micrometer dials consistent with 2MI
Heavy cast construction (~8,000–9,500 lbs)

Description:
The Cincinnati Model 2 Vertical Milling Machine is a manual, heavy-duty production mill designed for precision machining of metals and alloys. Known for its rigid construction, power-driven feeds, and versatile setup, it was a staple in toolrooms and manufacturing facilities for decades and is still valued for its durability and high torque cutting capability.

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✅ What It Does

This vertical mill performs a wide range of precision machining operations on workpieces such as steel, aluminum, cast iron, and other alloys. Common operations include:

• Face milling

• Slotting

• Drilling and boring

• T-slot cutting

• Angular milling

• Profiling

• Pocketing

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⚙️ Key Specifications (Typical for Model 2)

(Note: Exact specs may vary slightly depending on production year and sub-model)

Specification Detail

Table Size ~10" x 50" (varies by model year)

Longitudinal Travel (X) 30"–36"

Cross Travel (Y) 12"–15"

Vertical Travel (Z) 16"–18" (knee movement)

Spindle Taper #50 NST or Cincinnati proprietary taper

Spindle Speeds 16–25 speeds, ~30–1,500 RPM (gear-driven)

Feed Rates Power feed in all 3 axes

Motor 5 – 10 HP (varies by version)

Weight ~5,500 – 7,500 lbs

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🔧 Functions & Capabilities

• High torque cutting: Ideal for roughing large amounts of material.

• Precision finishing: Excellent for close-tolerance surfaces and fits.

• Power feed on X/Y/Z axes: Enhances finish and reduces operator fatigue.

• Swiveling head (on some models): Allows angular cuts and complex contours.

• Large table and travels: Accommodates larger or multiple fixtures.

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💡 Common Applications

• Tool & die work

• Jig and fixture making

• Mold and pattern work

• Repair and maintenance machining

• Custom fabrication

• Prototype parts and one-offs

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🏭 Used In Industries Like

• Aerospace

• Automotive

• Manufacturing

• Metalworking job shops

• Military/Defense

• Educational & vocational training programs

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📌 Summary Description

The Cincinnati Model 2 Vertical Milling Machine is a rugged and powerful manual mill designed for precision metal cutting. With a large table, robust spindle, and power feeds on all axes, it’s built for heavy-duty production or toolroom work. Known for long-lasting accuracy and dependability, it’s ideal for applications requiring consistent milling, boring, and slotting of metal components.