animation 360 rotation

hi all, I am trying to make a fruit machine, i have 3 cylinders, I have made an animation that rotates the cylinders 360 degrees on the x axis over 1:00 in the animation editor (sample rate 60).

currently all the cylinders have the same animation to test.

what I am doing is having a button that you press that then enables the animator to spin the cylinders this is my script :

 #pragma strict
 private var ray : Ray;
 private var rayCastHit : RaycastHit;
 var mySound: AudioClip;
 var reel_1 : GameObject;
 var reel_2 : GameObject;
 var reel_3 : GameObject;
 var rotateSpeed = 5; 
 
 function OnMouseUp () {
 
 //play sound
 audio.clip = mySound;
 audio.Play();
 
 StartCoroutine("Spin");    
 
     }
     
 function Spin(){
 
     reel_1.GetComponent(Animator).enabled = true;
     reel_2.GetComponent(Animator).enabled = true;
     reel_3.GetComponent(Animator).enabled = true;
     
     yield WaitForSeconds(1);
     
     //stop sound
     audio.Stop();
     reel_1.GetComponent(Animator).enabled = false;
     reel_2.GetComponent(Animator).enabled = false;
     reel_3.GetComponent(Animator).enabled = false;
 }

when I press my spin button the reels spin fine, the problem I am having is that when they come to a stop, on each press they seem to stop at a slightly different position.

I want them to always stop in the same place (like on a slot machine).

Anyone see what I am doing wrong?

cheers