Dacheeseman1928
Member
Hey Friends,
Recently I had an issue with one of my flying rigs that caused my cable to deform. After talking to my rigging supplier and some local pros (that have been doing this a lot longer than me) we concluded that it was due to my sheave diameter being too small. I was using 2" diameter sheaves with 1/8" AC cable. According to my rigging supplier and my Stage Rigging Handbook the correct sheave diameter for 7x19 1/8" cable is 3 3/4" (.125 x 30 = 3.75).
My mission now; finding pulleys that have correctly sized sheave for 1/8"cable. I have searched far and wide but was unable to find a pulley that had the proper dimensions. The best I could find was a pulley with the correct diameter but the grove is sized for 3/8" cable and it was well outside my price range (cheapest was still around $400). On top of this it seems most pulleys have a diameter that is too small for the cable size it is designed for.
I find it strange that there is so much hardware out there that doesn't meet this standard. It also seems odd that I'm the first person to discover this. Is there something I'm missing? Can someone explain this to me?
Follow up question; what kind of pulleys do you use when you are rigging small units (<75 lbs.) that only require 1/8" cable.
Cheers
Recently I had an issue with one of my flying rigs that caused my cable to deform. After talking to my rigging supplier and some local pros (that have been doing this a lot longer than me) we concluded that it was due to my sheave diameter being too small. I was using 2" diameter sheaves with 1/8" AC cable. According to my rigging supplier and my Stage Rigging Handbook the correct sheave diameter for 7x19 1/8" cable is 3 3/4" (.125 x 30 = 3.75).
My mission now; finding pulleys that have correctly sized sheave for 1/8"cable. I have searched far and wide but was unable to find a pulley that had the proper dimensions. The best I could find was a pulley with the correct diameter but the grove is sized for 3/8" cable and it was well outside my price range (cheapest was still around $400). On top of this it seems most pulleys have a diameter that is too small for the cable size it is designed for.
I find it strange that there is so much hardware out there that doesn't meet this standard. It also seems odd that I'm the first person to discover this. Is there something I'm missing? Can someone explain this to me?
Follow up question; what kind of pulleys do you use when you are rigging small units (<75 lbs.) that only require 1/8" cable.
Cheers