Strength of Roller on Fairlead, Wire Rope Deformation and Downward Winch Orientation.

I am trying to fit a winch below the back of the truck.

When a weight rating is given on the roller fairlead is that the weight it can take when providing a 90 deg deflection or only minor deflection of the wire rope?

How does one calculate the diameter pulley one needs for any given type of wire rope without causing damage. (fairlead rollers are not very large)

It would be very handy if this was possible and safe:

Is it possible? It sure would be convenient given the existing bracing and bumper

 

I’d think you’ll be more worried about shearing the rod that the fairlead drum rotates on or bearing failure between the rod and the drum. BUT I don’t think you have much to worry about. When they’re engineering these winches they’re going to do so doing a pull from every angle possible. They also use safety factors when eating weight.

Another way around this if you’re worried about the fairlead failing at the roller is to go synthetic line and the aluminum fairlead block that comes with them.

 

Agreed.

Good to know.

I assumed synthetic line would not like the friction and heat of a 90 deg deflection. Also... I am considering how dirty it might get or abused it might get. I will likely opt for synthetic in the front if i have one in the back as i will use the back more for recovery AND loading firewood.

Thanks, Mobtown for the response.

 

I have become good friends with Mr. Bill Burke. He has reminded me a number of times to get rid of that damn Hawse fairlead. Heat and friction is the killer to synth lines. I have a setup but I want to make a new bumper and sell my Shrockworks bumper as I can't bring myself to cutting the Shrockworks to make the roller fairlead work for me.

 

Pronghorn makes a bumper with a similar change in direction for the winch rope. I’m not convinced it’s a good idea.

http://pronghorngear.com/alpha-tacoma-aluminum-bumper/

 

Knew of he product but never noticed the winch location. Thanks @BlindingWhiteTac.
I am in the process of building a rear mount for the winch and a quick way to move it back there.

Any ideas or warnings are appreciated.