STEM Series Replacement Gear Set Tamiya 70269  [70269]

Tamiya 70269 - Universal Gear Set
Price:
£9.69
Brand:
Tamiya
Model:
70269
Condition:
Brand New
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Spare plastic gears for STEM Mini 4WD

The Tamiya 70269 Universal Gear Set is supplied as a replacement gear pack intended for the STEM Series construction range. The information below assumes you understand basic Tamiya construction parts and the simple gear-driven drivetrains used in educational Mini 4WD projects.

Use cases include renewing worn gears in school kits, sustaining functional display models, and supporting prototype iterations where straightforward, interchangeable gearing is needed. This set is provided as a common spare, not as a competitive racing upgrade.

Fit and installation tips: check gear tooth engagement and axial play before final assembly, ensure shafts are well aligned to prevent binding, and inspect gears for any cracked or distorted teeth. When lubricating, use a small amount of hobby-grade lubricant on contact surfaces and avoid excess that may trap debris.

Compatibility reminder: verify dimensions on your specific construction frame before fitting. The gear set is intended for the STEM Series construction platform and other Tamiya educational kits; it is not specified for use on high-speed, performance-oriented Mini 4WD racing chassis.

Will these replace stripped gears in my classroom kit?

In many cases yes, provided the bore and tooth profile match. Measure the old gear and compare before installing to ensure compatibility.

Are these intended for race use?

No, these are standard replacement gears for educational and hobby applications and are not specified as race upgrades for high-speed Mini 4WD chassis.

How do I check gear wear?

Look for rounded or chipped teeth, excessive side play, and any cracking. Replace any gear that shows deformation to avoid further drivetrain damage.

What is the best lubricant to use?

A light plastic-safe hobby grease or PTFE based lubricant on contact points will reduce wear. Apply sparingly and remove excess after a short run.

How should I store unused gears?

Store in a dry container out of direct sunlight and sort by size in labelled bags or compartments to prevent mix-ups.

Do these fit across different STEM kits?

Fit varies by kit and shaft dimensions. The gears are general-purpose for Tamiya STEM construction parts, so measure and compare to be sure they will fit your application.

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