im about to fit some new discs to my 51 scoob but dont know which way round the grooves should go they curved around the disc so they could go two ways can ne 1 help im waiting to do this now thanx

 

Usually this way but depends on the the actual 'vanes' in the vents between the 2 disc surfaces. If they are straight vanes then it doesn't matter really but some are designed to face a certain way to aid cooling, usually have a sticker on each disc telling you left and right.

 

I can help...

just not sure how to explain properly without being able to show u in person. the grooves should be facing in such a way that they would throw out dust etc. the wrong way is when they look like they would be scooping up air when spining. can you make any sense of my explanation? ...lol

 

the picture above illustrates this perfectly. if they were the other way round air would be flowing down the groove towards the centre instead of away from it.

 

thanks a lot guys thought id do a little post while i was eating and you cleared it up perfect thanx

 

as Richie sats they only matter if the vane inside is actually handed.................

a lot of AP discs (and a couple of others) are fitted correctly facing the oppostite way to pic above!!

alyn

p.s. added pic to show here

 

 

 

CHEERS PEOPLE

 

arent homer and 172 sport diff to each other? one set of groves point down and other up in conjunction with direction of rotation. im now confused

 

It depends if the discs have straight or curved viens in the centre of the discs , AP discs have curved viens so they machine there grooves the opposite way , I had some discs from them not so long ago which had the grooves going the same way as the vents ,

I mark my discs to run as the pic homer put up , this way any dust or debris get drawn to the outside of the discs rather than dragging it towards the bells.

 

that helps cheers ian. makes sense to trough the dust out during rotation

 

the bottom line is that you need to adhere to the suppliers fitting dirctions for that particular disc................

alyn

 

Forget the grooves on the face of the disc they can go either way, fit the curved ducts thro the middle of the disc like this.

 

- If the supplier's instructions elude to the need to throw dirt/water/heat out and away from the disc then fit this way...


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- If the instructions elude to having to have constant airflow to the grooves to aid cooling, then fit this way round...