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Additional Options

High Velocity  Weights

Low friction coefficient, Near zero "slip-stick" improved clutching

Proprietary self-lubricating PMAP composite

CNC precision machined, Not injection molded

Ultra wear resistance, No abrasive fillers

Heavy polymer thickness for longer wear

Non-crushing design, High tensil strength

High temp, Thermally conductive, Tested to 400°F

Locking weight design, will not rub on sheave

100% Made in USA

Patent Pending

The problem:

Most plastic materials exhibit a "Slip-Stick" drag problem where the weights take greater force to overcome their own friction causing an inconsistent power transfer during takeoff and over rough terrain. To overcome this condition, external lubrication such as grease must be added for smooth takeoff and to even out the sheave movement.

The solution:

Velocity Weights contain their own lubrication internally and do not require any external lubrication in order to operate smoothly during power transfer.

Velocity and acceleration of the weights is increased due to extremely low friction, reaction time to speed changes in centrifugal clutches is decreased.  This means smoother, dependable clutch action, even over the roughest terrain.

Most plastic rollers or sliders have a very thin jacket which wears rapidly and requires exterior lubrication. These exotic thermoplastic rollers have thick, solid jackets which enable them to wear a very long time and never need grease.

Many rollers crush due to heat and mechanical pressure. These rollers have solid centers and over four times the tensile strength of Teflon, a material often used in weight design.

The weight by the ball bearing in center of weight is centralized instead of spread to the outer diameter maximizing even wear around the circumference as well as the sides.

Design, Materials and Machining is 100% made in the United States, by Americans, created to the highest of standards and quality.

PMAP is Poly Metal Alloy Polymer.

Slip Stick is a very important factor in the cvt system design. It is the amount of friction there is to get a plastic (weights and sliders) moving from a stopped position to it’s moving state.

"Slip-Stick" is the difference between the coefficient of friction of the plastic during initial movement and the coefficient of friction while it is moving. So in a sheave, the plastic slider/weight in contact with the sheave metal at rest has different amount of friction than when it is actually sliding.

This happens with OD weights and partially with regular Round Roller weights , although it is much less with round rollers because the contact area is smaller. The “SlipStick” is so high in OD Weights that it takes a considerable amount of centrifugal force to break them free from their resting position. When they finally break free, the force now is far greater than what was required to operate the clutch in a smooth transitional manner. While this might appear to be a sudden increase in torque to the operator, it is in fact actually a decrease in efficiency and a loss in power.

This is why grease or some other form of lubrication helps in the cvt clutches. By lowering the “Slip Stick”, you get a smoother, more efficient cvt clutch system. But grease is simply not required in our greaseless weight set up with these weights and our coated sheaves.

Hunterworks Inc.
12097 Kelly Lane

Collinsville, MS 39325
Phone: 601-771-0070
Fax 601-771-0073

Email: todd@hunterworks.com

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