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PowerTech! Introduces Propellers for New Safety Torque Hub System
Spun hubs? Twisted drive shafts? Lower unit damage?
PowerTech! has released a new line of E-Class propellers which are specifically designed to house a revolutionary new hub system called Safety Torque. Unlike any other hub system in the world, Safety Torque provides repeated protection with no down time and zero maintenance.
Propeller hubs are designed to absorb the energy that is produced in an underwater impact. Typically a normal plastic or rubber hub do what they are designed for, but once the hub encounters a shock load it “spins out”, and leaves the vessel immobile. This leaves the boater with only two options, provided there is a spare hub, prop, and tools onboard. The boater can face the elements and get into the water to make a difficult repair onsite, or send a coast guard S.O.S (provided they have a radio) and have the vessel towed back to port. This is of course the best case damage scenario. If the prop strikes an object with enough force the damage goes beyond the hub and can result in very costly lower unit repairs.
So what sets Safety Torque apart from the rest? Safety Torque hubs are factory preset for a specific torque load. As the prop strikes an object, the hub releases to absorb the shock load, protecting the propeller, drive shaft, gears, and gear case from twisting and breaking loose. Once the obstruction has cleared the hub automatically resets and the vessel is able to continue at full power. The Safety Torque Hub System is offered in PowerTech’s E-Class series of stainless steel propellers.
Safety Torque also offers a Driveline Protection System which functions like the Hub System. This system replaces the propeller shaft coupler attached to the transmission output flange. The Driveline System is offered on the following transmissions listed below, as well as other custom applications.
| APPLICATIONS |
Safety Torque Specifications
for In-board Marine Applications |
| SafetyTorqueModels |
FitsTransmissions |
Shaft Sizes(max.) |
Torque(ft. lbs) |
| Model A |
KM35P |
1” |
45-325 |
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KM3V |
1” |
45-50 |
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KM35A/35A-2 |
1” |
45-325 |
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KM2P-1 |
1” |
70-285 |
| Model B |
ZF30M |
1 ½” |
350-575 |
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ZF25A |
1 ½” |
300-500 |
| Model C |
KM4A1 |
1 ¾” |
440-500 |
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KM4A-2 |
1 ¾” |
250-560 |
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KMH4A |
1 ¾” |
320-375 |
| Model D |
ZF45 |
2” |
380-1300 |
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KMH40A |
2” |
380-1300 |
| Model E |
ZF63A1 |
2” |
600-1230 |
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KMH50 |
2” |
620-890 |
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KMH50A |
2” |
700-1250 |
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ZF63A |
2” |
630-1280 |
| Model F |
MG5061A |
2 ½” |
860-1330 |
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KMH61A |
2 ½” |
1180-2200 |
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ZF85A |
2 ½” |
1195-2270 |
Safety Torque, buy it once use it for life.
For more information on Safety Torque or to place and order visit our website, or call 906-428-2740
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