Strombecker #8429 Vintage Gear Set – 4.5:1 Ratio

Vintage factory-carded gear set for early 3/32-inch motor shafts and 1/8-inch axles.

Genuine Strombecker #8429 gear set, still sealed on its original factory card. Suitable for period motors such as Pittman and Kemtron using the larger 3/32-inch motor shaft.

Specifications

• Strombecker Part Number: #8429
• Pinion Shaft Fit: 3/32 inch (approximately 0.0925 inch)
• Crown Gear Bore: 1/8 inch
• Gear Ratio: 4.5:1
• Condition: New old stock on original factory card

Installation Note

The pinion is a close sliding fit rather than a modern press fit. Secure it with solder, epoxy, or a suitable retaining compound. Gentle heat can simplify later removal.

Not for Mabuchi-style or other motors using 2mm (approximately 0.078-inch) shafts.