# 3mm Hexagonal Shaft Adapter for LEGO® Wheels (Pair) (POLOLU-1011)

**URL:** <https://forum.core-electronics.com.au/t/3mm-hexagonal-shaft-adapter-for-lego-wheels-pair-pololu-1011/11752>\
**Category:** Pololu\
**Created:** [9 October 2021 16:06 UTC](https://forum.core-electronics.com.au/t/3mm-hexagonal-shaft-adapter-for-lego-wheels-pair-pololu-1011/11752 "2021-10-09T16:06:17Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Core](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/core/32/57_2.png) [@Core](https://forum.core-electronics.com.au/u/Core)\
**Post date:** [9 October 2021 16:06 UTC](https://forum.core-electronics.com.au/t/3mm-hexagonal-shaft-adapter-for-lego-wheels-pair-pololu-1011/11752/1 "2021-10-09T16:06:17Z")

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This is a placeholder topic for [**“3mm Hexagonal Shaft Adapter for LEGO® Wheels (Pair)”**](http://core-electronics.com.au/catalog/product/view/sku/POLOLU-1011) comments.  
  
 ![](https://core-electronics.com.au/media/catalog/product//3/m/3mm_hexagonal_shaft_adapter_for_lego_wheels __pair___ pololu_1011__00.jpg)  
  
This adapter allows 3mm hexagonal shafts, the kind found on many Tamiya gearboxes, to be connected to LEGO’s wide variety of high-quality wheels. The adapters are sold in pairs.  
  
[**Read more**](http://core-electronics.com.au/catalog/product/view/sku/POLOLU-1011)

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**Author:** ![John180420](https://avatars.discourse-cdn.com/v4/letter/j/ea5d25/32.png) [@John180420](https://forum.core-electronics.com.au/u/John180420)\
**Post date:** [9 October 2021 16:06 UTC](https://forum.core-electronics.com.au/t/3mm-hexagonal-shaft-adapter-for-lego-wheels-pair-pololu-1011/11752/2 "2021-10-09T16:06:18Z")

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Can you tell me the the outer dimension of the shaft adapter SKU-Pololu-1011.  
  
Also, will the splines + fit to a Lego Actuator?  
  
Many thanks  
  
John.

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**Author:** ![James](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/james/32/4400_2.png) [@James](https://forum.core-electronics.com.au/u/James)\
**Post date:** [11 October 2021 04:54 UTC](https://forum.core-electronics.com.au/t/3mm-hexagonal-shaft-adapter-for-lego-wheels-pair-pololu-1011/11752/3 "2021-10-11T04:54:56Z")

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Hey John, Welcome to the forum!

The cross-shaped shaft end should definitely fit into an actuator, if this part is what you’re talking about:  
[https://www.brickowl.com/catalog/lego-linear-actuator-10-15-61927](https://www.brickowl.com/catalog/lego-linear-actuator-10-15-61927)

I’ve measured the cylindrical section, and it’s about 6.6mm if that helps.

Let me know if you need any more measurements!  
-James

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**Author:** ![John180420](https://avatars.discourse-cdn.com/v4/letter/j/ea5d25/32.png) [@John180420](https://forum.core-electronics.com.au/u/John180420)\
**Post date:** [11 October 2021 23:08 UTC](https://forum.core-electronics.com.au/t/3mm-hexagonal-shaft-adapter-for-lego-wheels-pair-pololu-1011/11752/4 "2021-10-11T23:08:09Z")

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Many thanks for the measurements James. Just what I needed to know.

I will get back on your site and make an order.

Thanks again.

John.

 ![FE135E2B1CC0498CAF331113AD447A4B.png](https://canada1.discourse-cdn.com/flex028/uploads/core_electronics/original/2X/f/f088f0981ba28181f1f3698c16350c8a26186647.png)