⚙️ Strombecker #8429 Gear Set – Pinion & Crown

3/32" (0.0925") Shaft • 1/8" Crown Gear • 4.5:1 Ratio • Vintage Factory Card

The Strombecker #8429 Gear Set includes a precision 3/32" (0.0925") pinion and 1/8" crown gear, providing a classic 4.5:1 gear ratio—perfect for restoring or tuning early slot cars using Pittman, Kemtron, and other vintage motors.

This vintage set is factory carded and ready to install on early 1/32 or 1/24 builds.

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🛠️ Technical Details

Part Number: Strombecker #8429
Gear Ratio: 4.5:1
Pinion Shaft Fit: .0925" / 3/32" (close sliding fit)
Crown Shaft Fit: 1/8"
Mounting: Recommended to secure with solder, epoxy, or Loctite
Packaging: Original Strombecker factory card

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✅ Why Choose These Gears?

• Designed for vintage 3/32" shaft motors — Pittman, Kemtron, etc.

• Will not fit 2mm / .078" shafts used on Mabuchi and similar motors

• Ideal for vintage restorations or custom retro builds

• More reliable than press-fit gears — no special pullers required

• High-performance racers prefer soldered gears for durability and alignment

Installation Tip:
Soldered gears prevent distortion, protect motor bearings, and are easy to remove with heat. A must-have for serious builders!

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📦 What’s Included

• 1 x Pinion Gear (3/32" shaft)

• 1 x Crown Gear (1/8" shaft)

• Factory-sealed on Strombecker display card

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🚚 Shipping Policy

• Ships next business day via USPS Ground Advantage

• Alternate shipping methods available on request

• I may upgrade shipping at no extra charge if it improves delivery time

• Arkansas buyers: sales tax applies

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💵 Combine & Save on Shipping

• Add items to your cart

• Click “Request Total” before paying

• I’ll send a combined invoice with actual shipping cost

• Already paid? I’ll refund any overage — just ask!

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🔁 Returns & Satisfaction Guarantee

• 30-day returns on new, unopened items

• Used/opened items may incur up to a 50% restocking fee

• Contact me first before initiating a return — I may offer a faster solution

• If your item arrives damaged or incorrect, I’ll make it right

• Do not open or use damaged items, as this may void any claims

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🌍 International Buyers

• Import duties/taxes not included — buyer is responsible

• I do not mark items as gifts or undervalue shipments (per U.S. law)

Estimated Delivery Times:

• First Class Mail: 2–4 weeks

• Priority Mail: 6–10 business days

• Express Mail: 4–8 business days
  (Customs delays may occur)

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👋 About Me

I’m Jim Cunningham, a lifelong slot car enthusiast and founder of OmniSlotBox and the SlotCarClubhouse in Sherwood, Arkansas. With over 50 years in the hobby, I love helping others restore, race, and enjoy these timeless machines.

If you're ever in the area, drop by the SlotCarClubhouse — visitors are always welcome!

Thanks for supporting small slot car businesses like mine.
Let’s race!
~ Jim Cunningham
OmniSlotBox & SlotCarClubhouse – Sherwood, Arkansas