> For the complete documentation index, see [llms.txt](https://docs.andymark.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.andymark.com/robits-build/getting-started/mobility/carriers-and-mounting-brackets.md).

# Carriers and Mounting Brackets

### Robits Carriers

[Robits carriers](https://andymark.com/products/robits-carriers) provide support and connection points for rotating mechanisms. The ecosystem has both shaft carriers and bushing carriers.

#### Bushing Carriers

<figure><img src="https://andymark.com/cdn/shop/files/am-5013_dbe20f28-0c98-4b8e-b630-164f0c007fd4_700x700.jpg?v=1772134214" alt="" width="375"><figcaption></figcaption></figure>

[Bushing carriers](https://andymark.com/products/robits-carriers?variant=44493417021612) allow a 3/8 inch hex shaft to rotate inside the carrier. The carrier is made of acetal that supports the shaft while allowing it to rotate with relatively low friction.

Bushing carriers are useful when a shaft needs to rotate while being supported by, but not attached to, the robot structure. They can be used to support long shafts or provide an idler support point. When installing a bushing carrier, make sure the shaft is properly aligned with the other supports.&#x20;

#### Shaft Carriers

<figure><img src="https://andymark.com/cdn/shop/files/am-5015_14b052ed-2524-4230-b39f-fe855d69756b_700x700.jpg?v=1772134214" alt="" width="375"><figcaption></figcaption></figure>

[Shaft carriers](https://andymark.com/products/robits-carriers?variant=44493417087148) are designed to engage a 3/8 inch hex shaft and can transfer torque through the carrier. A shaft carrier can be useful when the shaft needs to transfer rotation between components. The double end shaft carrier can support or position a shaft at two structural locations.

***

### Robits Mounting Brackets

Robits mounting brackets provide a way to attach motors to Robits structural components. There are several brackets designed for different motor and gearbox configurations.

Robits mounting brackets include the Side 2-Hole Motor Mount, Side Slotted Motor Mount, 80T/100T Motor Mount, Single Motor Bearing Mount, Pass Through Plate, Sport Gearbox Mount, and 80T Sport Gearbox Mount.

{% hint style="info" %}
All motor mounting brackets discussed here are for the FTC NeveRest motor. See RECF Actuators and Adapters for mounting RECF motors&#x20;
{% endhint %}

#### Motor Mount (Side 2-Hole)

<figure><img src="https://andymark.com/cdn/shop/files/am-5012_564d0c67-5651-49c2-92a6-b60a9d541e42_700x700.jpg?v=1772134181" alt="" width="375"><figcaption></figcaption></figure>

The [Side 2-Hole Motor Mount](https://andymark.com/products/robits-mounting-brackets?variant=44493416038572) is designed to attach a NeveRest motor to Robits structure. The bracket uses an eight-hole NeveRest mounting pattern which allows the motor to be installed in 45 degree increments. The bracket can also be used with a [3/8 inch hex bearing](https://andymark.com/products/3-8-0-375-in-hex-id-7-8-0-875-in-od-sealed-flanged-bearing-fr62rs-hex). The two structural mounting holes allow it to be attached directly to Robits tubing.

#### Motor Mount (Side Slotted)

<figure><img src="https://andymark.com/cdn/shop/files/am-5033_55d6d3c4-c1a5-4f50-9148-8706937d7f06_700x700.jpg?v=1772134181" alt="" width="375"><figcaption></figcaption></figure>

The [Side Slotted Motor Mount](https://andymark.com/products/robits-mounting-brackets?variant=44493416071340) provides motor mounting while allowing additional positioning adjustment. The slots are useful when the exact motor position needs to be adjusted to achieve proper gear or belt alignment. This can be especially helpful when prototyping mechanisms. Like the Side 2 Hole Motor Mount, it uses an eight hole NeveRest mounting pattern and can accommodate the 3/8 inch hex bearing.

#### 80T/100T Motor Mount

<figure><img src="https://andymark.com/cdn/shop/files/am-5017_cdd293a6-dcc8-4002-80c1-40b48c139baa_700x700.jpg?v=1772134181" alt="ඞ" width="375"><figcaption></figcaption></figure>

The [80T/100T Motor Mount](https://andymark.com/products/robits-mounting-brackets?variant=44493416104108) is designed for use with 1 × 1 inch Robits tubing and can be used to create 80 tooth or 100 tooth gearbox configurations. The mounting slot allows different Robits gear combinations to be used:

* 30T and 50T gears for a 1.7:1 ratio
* 40T and 40T gears for a 1:1 ratio
* 40T and 60T gears for a 1.5:1 ratio
* 50T and 50T gears for a 1:1 ratio

The similar [80T/100T Double Motor Mount](https://andymark.com/products/robits-mounting-brackets?variant=44493416136876) can handle the same ratios with two motors.

### Bearing Mounts and Pass Through Plates

These components are useful when a motor and driven shaft need to be supported within the same general gearbox or structural assembly.

The [Single Motor Bearing Mount](https://andymark.com/products/robits-mounting-brackets?variant=44493416169644) can mount a motor while also supporting a bearing. It is designed to work around 1 × 1 inch Robits tubing and can hold an approximately 0.875 inch outside diameter bearing.

The [Pass Through Plate](https://andymark.com/products/robits-mounting-brackets?variant=44493416202412) is primarily designed for the Robits Pass Through Gearbox. It can also be used for motor mounting or bearing support and is designed to work with 1 × 1 inch Robits tubing.