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  • turrets

    I' like to slow down the indexing speed of the turrets, now do i need to slow the pinwheel too?I worked on jetbacks and the turret speed to me was perfect,not ripping fast yet nice slow & even.Thses a-2 units have been changed to the j/b pullies on motors yet the pit/elevator speeds are like the normal a-2 speeds.,i believe the pit transmission pulley was changed to help its speed.I know there is a way to do this w/o totally slowing the p/w'nt there or am i just hopeful.I like a moderate slow turret for it causes fewer troubles in the long haul.,i'm in no RUSH to load up the turrets. Thanks!Sure there is a post somewhere on this somwhere.

  • #2
    Re: turrets

    If I'm not mistaken jet back pulleys have the same elevator size pulley as A2(3-1/2). If your pulleys are 2 piece change elevator pulley to 3". If you could find a smaller elevator pulley on ball wheel drive side(jack shaft belt drive pulley), this will slow down your turret and pinwheel. Good luck--I like theslower indexing turret also.


    • #3
      Re: turrets

      Agree with Larry on the importance of the 3" rear pulley on the motor as the first step in slowing down turrets.We also replaced the rear jack shaft pulley (on the Ball wheel pulley side)from a 3" to a 2.2"(grainger # 3X808).
      Also on A-2's with bevel gear drive the ratio is different because of the gears,the turret speed is greater than the traditional belt driven long turret belt


      • #4
        Re: turrets

        Blackout-I agree with masternut 100%
        If your interested in pulley sizes for the
        different machines the quality parts book,
        I'm looking at the 98-99 year has them on
        page 47.The jetback turret actually is the
        fastest moving of all the brunswick models (the motor- elevator pulley is 3.50 as compared to the 3.0 that both the A and the A-2 use).The ones you worked on and liked their turret speed had probably been slowed down before you got there.Slowing them down as masternut
        suggested is the way I would go.Ive done that to all the houses I've worked at over the past 15 years or so with the only real
        complaint being from bowlers being the ones who throw 3 strikes in the 10th frame or if they foul during practice to get a full rack sometimes they have to wait for pins.I try to keep 22 pins in each machine to help that problem.Slowing them down as masternut suggested also gets rid of some turn pan jams
        as well.If you do nothing else at least try
        changing the small ball wheel jackshaft pulley with the grainger one or brunswick#
        12-400035-9 which ever one is cheaper and easier for you to will like the results.
        Good luck

        [This message has been edited by David Johnson (edited 05-07-2000).]


        • #5
          Re: turrets

          Gotta concurr with the other guys in this one, its slow the whole back end down and its great.


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