As part of my Mach1 rebuild project with a terminator engine, we're rebuilding the lower crank pulley component. Since this component's rubber bushings are no longer available from Ford (lame), we decided to get some material from McMaster-Carr and cut our own bushings.
I found two ideal tubes with the right diameters, one being polyurethane (part 87235K12) and the other being extreme-temperature silicone rubber (part 5546T56).
Both of these tubes have a durometer hardness of 60A (medium hard).
Taken from McMaster-Carr's site, here's some relevant information about their polyurethane:
Temperature Range: -20° to 185°F
Tensile Strength: 40A tubes are 850 psi; 60A tubes are 4000 psi; 80A and 95A tubes are 6500 psi; 90A tubes are 5500 psi; 75D tubes are 7500 psi
Use indoors
And here's some information for the extreme-temperature silicone rubber:
Temperature Range: -60° to 500° F
Tensile Strength: 700 psi
I'm leaning towards the polyurethane, but I'm somewhat concerned about the indoor use and lower temperature rating.
Anyone have any opinions or recommendations?
I found two ideal tubes with the right diameters, one being polyurethane (part 87235K12) and the other being extreme-temperature silicone rubber (part 5546T56).
Both of these tubes have a durometer hardness of 60A (medium hard).
Taken from McMaster-Carr's site, here's some relevant information about their polyurethane:
Temperature Range: -20° to 185°F
Tensile Strength: 40A tubes are 850 psi; 60A tubes are 4000 psi; 80A and 95A tubes are 6500 psi; 90A tubes are 5500 psi; 75D tubes are 7500 psi
Use indoors
And here's some information for the extreme-temperature silicone rubber:
Temperature Range: -60° to 500° F
Tensile Strength: 700 psi
I'm leaning towards the polyurethane, but I'm somewhat concerned about the indoor use and lower temperature rating.
Anyone have any opinions or recommendations?