Hub-Shaft Encoders

Q: What is a hubshaft encoder?

A hubshaft encoder is designed to sit on the end of a motor shaft. The motor shaft does not pass entirely through the encoder. This type of encoder is often referred to as a blind thru-bore encoder. Unlike a thru-bore or true hollow-shaft encoder, visually you will not be able to see through a hubshaft encoder.

Q: What does a hubshaft encoder do?

The hubshaft encoder serves the same function as other encoders, but it is unique in the way it mounts. There are many different ways to mount an encoder, but the hubshaft encoder requires a flexible tether and a shaft clamp, or collar. It provides the same benefits of a hollow-shaft encoder, in that it does not require an encoder coupling to mount, reducing the overall space needed.

Q: What is a blind hollow-shaft encoder?

A blind hollow shaft encoder, also known as a blind thru-bore encoder, are other names for the hubshaft encoder. This type of feedback device is partially hollow so that it can sit on the end of the motor shaft. The key difference with a thru-bore or true hollow-shaft encoder is that you will not be able to visually see through the center of the encoder.

Similar to hollow-shaft encoders, hub-shaft rotary encoders offer direct mounting to a motor shaft or driven shaft but do not require the shaft to the shaft to extend through the encoder. Hub-shaft encoders are ideal for direct mounting in limited space and offer improved sealing with no opening on the back of the encoder. Hub-shaft encoders are mounted with a tether point to prevent free encoder rotation and a plastic sleeve or insert is typically used to isolate the encoder from motor shaft current.

Download our free white paper to learn more about about encoder mounting styles

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Incremental Hub-Shaft Encoders

View all hub-shaft incremental encoders offering simplified installation and several tether options in bore sizes from 0.25 t...

Absolute Hub-Shaft Encoders

Dynapar offers a wide range of hub-shaft absolute encoders with bore sizes of 0.25 to 0.5 inches and several tether options a...

Featured Hub-Shaft Encoders

H20 Hub-Shaft

2.0" size incremental hub-shaft encoder. Single ended or differential output with index option. IP66 sealing available. 1-2,540 PPR.

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E14 Hub-Shaft

Miniature hub-shafted encoder with flexible spring mount offers <2.0" flange size options and several output options. 100-2,540 PPR.

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HSD25

Compact 2.5" size hub-shaft encoder designed for harsh environments offers IP67 sealing and 400G shock 20G vibration rating. 1-3,600 PPR.

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AI25 size 25 absolute encoders

Standard size 25 absolute encoders come with shaft or hub-shaft mounting, multiple protocols including SSI, BiSS, DeviceNet and more.

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AD35

Single-turn hub-shaft 38mm size absolute encoder for servo motors. SSI, BiSS and SSI Gray protocols. Up to 22 bit single-turn resolution.

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AD36

Compact size 15 or 38mm diameter miniature absolute encoder. SSI, BiSS, SSI Gray options. Up to 22 bit ST and 12 bit MT resolution.

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Featured Accessories

Tethers and Cover Kits

See tether and cover kits including single point, slotted and rod tethers as well as basket covers that attach over the encoder to motor face.

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Encoder Cables

Find mating cables, cable assemblies with connectors, raw cable and shielded cables in a variety of lengths and output types.

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Frequently Asked Questions about Hubshaft Encoders

What is a hubshaft encoder?

A hubshaft encoder is designed to sit on the end of a motor shaft. The motor shaft does not pass entirely through the encoder. This type of encoder is often referred to as a blind thru-bore encoder. Unlike a thru-bore or true hollow-shaft encoder, visually you will not be able to see through a hubshaft encoder.

Download a free white paper on encoder mounting techniques here

What does a hubshaft encoder do?

The hubshaft encoder serves the same function as other encoders, but it is unique in the way it mounts. There are many different ways to mount an encoder, but the hubshaft encoder requires a flexible tether and a shaft clamp, or collar. It provides the same benefits of a hollow-shaft encoder, in that it does not require an encoder coupling to mount, reducing the overall space needed.

What is a blind hollow-shaft encoder?

A blind hollow shaft encoder, also known as a blind thru-bore encoder, are other names for the hubshaft encoder. This type of feedback device is partially hollow so that it can sit on the end of the motor shaft. The key difference with a thru-bore or true hollow-shaft encoder is that you will not be able to visually see through the center of the encoder.

Hub-Shaft Encoders