> For the complete documentation index, see [llms.txt](https://docs.wcproducts.com/welcome/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wcproducts.com/welcome/greyt/greyt-telescope/assembly-instructions/bottom-block.md).

# Bottom Block

Assembly instructions are interchangeable between the 1”, 1-1/2”, 2”, and 2-1/2” GreyT Telescope Bottom Blocks. 

{% hint style="success" %}
Vibra-TITE VC-3 Threadmate ([Vibra-TITE](https://wcproducts.com/products/threadlocker)) is recommended on all bolts that thread into a tapped hole.
{% endhint %}

## Step 1

The size of the 1/4” ID bearings used in this step are determined by the wall thickness of tube you are using. For 1/8” wall tube these bearings will be 1/4” ID x 1/2” OD bearings, and for 1/16” wall tube these bearings will be 1/4” ID x 5/8” OD bearings. 

<img src="/files/5aA9XZ9dERj73EBr7ssu" alt="" width="563">

## Step 2

There should be one Bearing Stack-Up for each slot in the GreyT Bottom Block you are assembling; 4 for the 1” Tube Bottom Block, and 8 for the 1-1/2” to 2-1/2” Tube Bottom Blocks.

{% tabs %}
{% tab title="1" Tube Bottom Block" %} <img src="/files/mPlEFzWHLfJxyEmv9z1K" alt="" width="450">
{% endtab %}

{% tab title="1-1/2" to 2-1/2" Tube Bottom Block" %} <img src="/files/DdMjnRFnGe6Y4kl256f0" alt="" width="450">
{% endtab %}
{% endtabs %}


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