Throughbore Overview


The Throughbore Upgrade Package allows you to easily mount your Helium Canandcoder to different mechanisms. Features include a 1/2 inch hex bore, 2 inch mounting circle compatible with #10 bolts, and a circular counterbore to give spacing away from bearing flanges.

Image showing how a throughbore encoder works



Improper assembly, such as overtightening screws, can result in permanent damage to the throughbore or encoder

Step 1: Collecting the parts

Collect the parts you will need to assemble the throughbore. What you will need is the three items included in the throughbore bag: the throughbore package, the throughbore cover, and the grey bolt spacer. You will also need the M2.5 case screw from your Helium Canandcoder.

Image showing the various things you need to assemble a throughbore, including the main assembly, cover, spacer, and screw

Step 1: Place the Encoder

Gently place the encoder into the cutout for it. The CAN pads and IDC connector should be facing up. The CAN pads should be level with the throughbore surface when the encoder is successfully placed into the package.


If you are using a 10 pin IDC cable, now is the best time to connect it. Once the cover is placed on the throughbore, this port will be inaccessible

Image showing a Helium Encoder with a 10 pin IDC cable connected, placed in the throughbore package

Step 2: Place the Cover

Carefully place the white encoder cover over the encoder, using the two pegs on the cover to align with the two 4-40 holes on the Helium Encoder. When properly placed, the cover should be close to flush with the surface of the throughbore package. Carefully place the grey spacer over the center screw hole.

Image showing a Throughbore package with cover and spacer placed on top

Step 3: Screw the Cover on

Using the M2.5 case screw that came with your Helium Canandcoder, screw the case onto the package. You don’t need excessive force, screw it until you feel slightly more resistence and the cover is retained in place. Make sure the spacer stays in place on under the screw.


Improperly screwing in the encoder, using the screw without the cover, or not properly using the spacer can result in permanent damage to the throughbore package or encoder

Image showing a fully assembled Throughbore package

Your throughbore is now assembled and ready to use!