Pololu Universal Aluminum 3mm Mounting Hub (4-40)

PololuSKU: RB-Pol-133
Manufacturer #: 1078

Price  :
Sale price $7.49

Shipping calculated at checkout

Stock  :
In stock, 8 units

Payments and Security

American Express Apple Pay Diners Club Discover Meta Pay Google Pay Mastercard PayPal Shop Pay Venmo Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.


  • Designed to work with most 3mm shafts, including round shafts, 'D' shafts, and Tamiya's 3mm hexagonal shafts
  • One Allen wrench and two 4-40 set screws included
  • Shaft diameter: 3mm
  • Each hub has four mounting holes for 4-40 screws (not included)
  • Sold in pairs

Customer Reviews

Based on 3 reviews
Tamiya Compatibility

Good product, matching expectations. Be careful however to buy the 8 screws 4-40 to fix accessories.

Life Saver

These are a must for Tamyia Gearbox kits with 3mm Hex Shafts. If your drive gears get stripped these can easily be used to secure drive wheels with minor modification.

Pololu Universal Aluminum 3mm Mounting Hub

these things are AWESOME! I used them to connect some wheels to my drive motors. The hardest part about it was finding the centering point to secure them at. I DIDN'T want an off center the wheel. I spent several hours with ruler measuring, adjusting, & remeasuring to get it right. Once everything was together correctly, I am pleased with this product.

Estimate shipping

You may also like