Thread: What size winch on ARB bar?

Go for it
Check warn for the actual size and weight and compare it to the 12000 winch . There might only be a few kgs in it .
Worst that could happen is you have to on sell it.

If you get it in the ARB then make sure you never stall the winch... It'll pull the bar straight out of the chassis... That's why the 9500 is the common choice.

A 12000 gets very close the shear capacity of the chassis.

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Originally Posted by Yorkshire_Jon

If you get it in the ARB then make sure you never stall the winch... It'll pull the bar straight out of the chassis... That's why the 9500 is the common choice.

A 12000 gets very close the shear capacity of the chassis.

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Thanks Jon. Please excuse my ignorance, but what do you mean by "stall the winch"? I guess I don't quite understand all the risks associated with this gear.

Originally Posted by Yorkshire_Jon

If you get it in the ARB then make sure you never stall the winch... It'll pull the bar straight from the chassis... That's why the 9500 is the common choice.

The maximum pull of a electric winch is at its slowest speed just before the mechanism stalls.

A 12000 gets very close the shear capacity of the chassis.

What is 12000 in tonnes metrics?
12000 pounds = 5.3571 long ton, or 5.4431 tonne, or 6.0 short ton

That 5.4431 tonnes is some serious strain on the chassis if the vehicle isn't moving when the 12000 winch is at its maximum pull.

Think of the pressures involved if the chassis is caught on say, its gearbox cross member and all the 5.4431 tonnes pull of that winch is concentrated on a point somewhere near the centre of that member, it will bend, drawing the two sides (rails) of the chassis together.

Using a snatch block at the anchor end to double the purchase, will do damage as then the pull becomes 10.8862 and that would be well over the strength of most four wheel drive's chassis.
.

Warn recommend 1/4 inch plate (6mm) for a 8274 and they are only 8000 pounds. The ARB bull bars that i have seen have all used thinner steel than that and are supposedly for higher rates winches.. I have always found this interesting.

The bull bar that i am making has a 6mm cradle for the winch.. but is extremely heavy!

Actually the 16.5 has a lower powered motor than the 9500xp: 4.6hp to 6hp but has a much lower gear ratio at about 330:1 compared to the 9500's 150:1.
This lower ratio will give you more time/warning before you bend/snap something(6m/min at 8000 pounds compared to 8.8m/min by the 9500 at 8000 pounds), but it may pay to check your bar as the 16.5 is about 2in bigger in every direction compared to the 9500, about 625x250mm compared to 577x195mm as well as 20kg heavier, 40 v 63.
Maybe check the grade steel used by arb as a higher grade means same strength but thiner But it could also be a recomendation for the shock loading as the 8274 is their fastest winch!
The 16.5 also draws far less power for the same pulling power, go to warn and compare.
One final question doesn't putting a sheave on your fixed point and running the hook through this and back to your 4x4 double the pulling capacity ? Wouldn't this also double the strain/pressure?

Warn Industries - Jeep, Truck & SUV Winches

Originally Posted by frantic

Actually the 16.5 has a lower powered motor than the 9500xp: 4.6hp to 6hp but has a much lower gear ratio at about 330:1 compared to the 9500's 150:1.
This lower ratio will give you more time/warning before you bend/snap something(6m/min at 8000 pounds compared to 8.8m/min by the 9500 at 8000 pounds), but it may pay to check your bar as the 16.5 is about 2in bigger in every direction compared to the 9500, about 625x250mm compared to 577x195mm as well as 20kg heavier, 40 v 63.
Maybe check the grade steel used by arb as a higher grade means same strength but thiner But it could also be a recomendation for the shock loading as the 8274 is their fastest winch!
The 16.5 also draws far less power for the same pulling power, go to warn and compare.
One final question doesn't putting a sheave on your fixed point and running the hook through this and back to your 4x4 double the pulling capacity ? Wouldn't this also double the strain/pressure?

Warn Industries - Jeep, Truck & SUV Winches

The size / power of the motor is irrelevant with regard to pulling ability/capacity... It's the gearing that decides that and hence the reason why the bigger load winches are generally slower.

Higher grade steels are more brittle that lower grade steels. Low grade steels (gr 4.8) will deform before failure, grade 12 steel will simple shear. Grade 8.8 is a middle road compromise. I'd bet ARB use mild steel for their bars.

Yes, if you use double lines for your recovery you will effectively double your winches capacity.

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Originally Posted by Yorkshire_Jon

Yes, if you use double lines for your recovery you will effectively double your winches capacity.

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That's my point exactly
What's the difference between a slow single line pull at 10-16,000 pounds max to a double line pull that goes from 12-18000 pounds but is 45% faster?
If the winch fits and your prepared for the extra weight it has the same mounting bolt pattern as a 9500.