Indiana General Corp 12 Volt DC Motor PN 0905-69 528138-1 NOS Tested & Working for Sale

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Indiana General Corp 12 Volt DC Motor PN 0905-69 528138-1 NOS Tested & Working For Sale

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Indiana General Corp 12 Volt DC Motor PN 0905-69 528138-1 NOS Tested & Working:
$22.50

This genuine Indiana General Corp. brushed permanent-magnet DC motor (PN 0905-69) was pulled from industrial surplus. It powers up instantly at 12V, spins smoothly without noise or vibration, and draws 0.245A no-load. The housing shows minor surface scratches consistent with age, but the shaft and bearings are in original working condition. Ideal for robotics, small appliances, or restoration projects.
Testing & Performance

Test Method: Powered at 12V under no-load conditions and after sitting for over 50 speed ?? RPM (see AI generated specs below)
No-load current draw Accessories: motor only (mounting screws not included)

Key Specifications and Performance Estimates

Parameter

Indiana General 0905-69 (528138-1)

Reference/Comparable 1960s PMDC Motors

Rated Voltage

12 V DC

12–24 V DC

Construction

Brushed, Permanent Magnet

Brushed, PM (Alnico/Ferrite Magnets)

Enclosure

Sealed/vented carbon steel

Closed/ventilated (optionally)

Shaft

1137-1144 CRS, single/double extension

Carbon/stainless steel, custom opt.

Bearings

PM Iron (std), Ball/Bronze optional

Ball, bronze sleeve (higher-grade in industrial)

Lubrication

Synthetic, lifetime sealed

Grease/lifetime sealed common

Brush Material

Carbon/Electrographite (2k–5k hr life)

Carbon, graphite, electrographite, copper graphite

Insulation Class

B (130°C standard)

B (130°C), F optional

Speed (no-load, est.)

1,500–4,500 rpm

1,500–5,000 rpm

Stall/Peak Torque

0.1–1.0 Nm (typical size est.)

0.07–1.0 Nm

Rated Power

10–50 W (estimated)

10–50 W

Efficiency

Up to 75% (standard)

60–75%

Directionality

Reversible (by polarity)

Reversible

Application Example

Conveyors, blowers, copiers, AGVs, pumps

Automotive, office, automation

Date Code

8/67

Various—common throughout the 1960s

Table constructed by synthesizing Indiana General literature and contemporary 12 V PMDC motor technical catalogs from similar manufactured products.

The Indiana General 0905-69 is a classical brushed PMDC design, structurally consisting of:

Stator: Carbon/steel (cylindrical) housing with internal permanent magnets (likely Alnico or early ferrite/cermet composition for this era).
Rotor (Armature): Laminated steel core with wire windings, connected to a multi-segment commutator.
Brushes: Carbon or electrographite blocks held by brush springs, transmitting current to the commutator.
Bearings: Standard PM iron bearings, upgradeable to bronze or ball bearing for high-load or low-noise requirements.
Enclosure: Typically closed (to protect from dust and debris) but with variants in venting depending on application.
Shaft: Precisely machined 1137-1144 cold-rolled steel; optional stainless steel for demanding environments.

These features represent the dominant trends of the era—durability, serviceability (with replaceable brush and endcaps), and robust magnetic elements for consistent output over thousands of hours of operation.

Operational Notes

Directional Control: Easily reversed by switching input polarity, supporting offerirectional actuation.
Thermal Overload: Motors could handle substantial overcurrent for short periods (up to 10–12× rated torque at startup), but extended overload risked demagnetization of early Alnico magnets—a known failure mode of 1960s PMDC motors.
Environment: Most installations expected operation within −20°C to +40°C; extreme environments used higher-cost insulation and magnet precise actuator requirements in medical devices, as well as aircraft instrument and control automation though concrete documentation is more scant for these

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