Rotary encoder physical dimensions

[Akanimo]

Hi everyone,

Attached are pictures of an encoder that I just acquired. The package does not come with a flex coupling nor a mounting bracket. Attached too is a picture of the specifications as presented by the seller.

I have also attached a picture of the coupling and that of the different sizes of coupling.









I'm having trouble selecting the right coupling size for the encoder shaft. Any help is appreciated.

 

[andre_luis]

Once the encoder axis diameter is 6mm, I would choose the coupler with internal diameter specified with 5-6,35mm. The tighter, the lower the chance of future wear problems due to being anchored mostly by the fixation screws, but this would give you less maneuver to fit.

 

[Kajunbee]

Are the coupling sizes indicating different hole sizes on each end of the coupling.

 

[Akanimo]

Once the encoder axis diameter is 6mm, I would choose the coupler with internal diameter specified with 5-6,35mm...

Okay. Please may I ask why 5?

 

[andre_luis]

Okay. Please may I ask why 5?

Not why 5, but rather why 6,35mm; that´s because this 0,35mm clearance would allow you to plug the 6mm axis with some easiness if compared to the 6mm-6mm option; not too tight, not too loose.

 

[Akanimo]

Are the coupling sizes indicating different hole sizes on each end of the coupling.

Yes they are. I just found the attached photo from another seller's page. They are a group of a lot of sellers sharing the same pattern of presenting specifications.



For the encoder shaft, I should go for 6.35mm, just like andre_teprom had suggested, since the 6mm-bore will be too tight slotting the 6mm-encoder shaft into it. So the other value depends on the diameter of the motor shaft.