Bevel gears - does it matter which is smaller/larger?

[skotl]

I'm having brain-fade: can't figure out whether this is a problem or not...

So I bought a second hand Evolution table saw (R255MTS) and the height bevel gears were stripped. Splurged £6 on a pair from evo and it seems that the pair coming off are both 31mm but the supplied pair are 29mm and 31mm respectively.

There is nothing in the exploded parts diagram that suggests that the larger one should be fitted to one spindle or the other (the part number refers to the pair). No response from evo to my emails.

I think it shouldn't matter which is fitted to which in terms of fitment - I know there's obviously a difference in gearing but it's only a handwheel so I'm not concerned about that.

Am I right to be unconcerned and just fit them either way?

 

[Pete.]

The end of the shaft of the bigger gear will be closer to the centreline of the shaft holding the smaller one.

 

[skotl]

The end of the shaft of the bigger gear will be closer to the centreline of the shaft holding the smaller one.

Huh. That makes sense - told you I was having brain fade - thanks

 

[pedrobedro]

Will the different sizes alter the teeth number and the gearing respective of which way round they are fitted ?

 

[Pete.]

Will the different sizes alter the teeth number and the gearing respective of which way round they are fitted ?

Absolutely the ratio is directly related to the driver/driven tooth count. It's no different to regular spur gears.

 

[skotl]

Yeah, but it's just for winding the blade up and down by hand and the difference is less than 6% so I don't think that's an issue.
To be honest, I'm probably overthinking this - the play in all of the parts is likely way over 1mm in the radius difference.