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    Rotary encoder physical dimensions

    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.

    Click image for larger version. 

Name:	encoder.PNG 
Views:	3 
Size:	169.8 KB 
ID:	154670

    Click image for larger version. 

Name:	encoder spec.PNG 
Views:	10 
Size:	120.5 KB 
ID:	154671

    Click image for larger version. 

Name:	Encoder coupling pic.PNG 
Views:	4 
Size:	263.2 KB 
ID:	154672

    Click image for larger version. 

Name:	encoder coupling dimension.PNG 
Views:	11 
Size:	32.8 KB 
ID:	154673

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

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    Re: Rotary encoder physical dimensions

    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.
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    Re: Rotary encoder physical dimensions

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


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    Re: Rotary encoder physical dimensions

    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?
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    Re: Rotary encoder physical dimensions

    Quote Originally Posted by Akanimo View Post
    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.
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  6. #6
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    Re: Rotary encoder physical dimensions

    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.

    Click image for larger version. 

Name:	Encoder Coupling diameters spec.PNG 
Views:	5 
Size:	226.8 KB 
ID:	154675

    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.
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