F5 Turbine Nosecone Assembly - Includes new spindle/collet, wave/plate Washers, 24 Vane Impeller, Ceramic Bearings - Both rear & front flanged (sealed for dust & debris protection, lube-free, radial or angular designed with o-rIngs), 7 jet port injector manifold, Fluted brass nosecone with 10 seated exhaust ports, New housing o-ring. Fully Assembled, just screw on to the Vortex F5 housing. Your choice of bearing and spindle type.
Ceramic Bearings are ideal for the Vortex F5. They are superior to common steel bearings in many ways. Ceramic is the perfect material for obtaining higher RPM (faster speed).
Ceramic balls require less lubricant and have a greater hardness than steel balls which will contribute to increased bearing life. Thermal properties of ceramic ball bearings are better than steel resulting in less heat generation at higher speeds.
Ceramic bearing assemblies use ceramic balls but they are constructed with steel inner and outer rings. Ceramic balls weigh up to 40% less than steel balls. This reduces centrifugal loading thus ceramic bearings can operate up to 50% faster than conventional bearings. This means that the outer race groove exerts less force against the ball as the bearing spins, reducing the friction and rolling resistance. The lighter ball allows the bearing to spin faster, and uses less energy to maintain the speed.
By not having to insert burs by pressing them down on a hard surface like other carving tools on the market, radial bearings can be utilized instead of angular bearings. Radial bearings are better suited for carving on the sides, unlike angular bearings which are primarily used for drilling.
Permanently Lubed for Life Turbine Bearings
Within the internal makings of the Vortex F5, there are turbine bearing assemblies which are permanently lubed and never need oiling. Warning: using an in-line mist fog oiler or placing drops of oil or cleaner into the hose may cause damage to the carver and void the warranty.
Radial Bearing Preload
The purpose of preload is to eliminate clearance that is designed into ball bearings. Radial ball bearings are made with a clearance or space between their components to allow for free movement. This space, if not taken up by a preload can allow the rolling elements to slide rather than roll, or even allow for races to misalign.
Once the preload is applied per specification, the bearings will yield a long life and precision runout (eccentricity).
The nosecone has been improved to provide a better purchase by using a dozen flutes instead of circular grooves. By placing these smooth flutes on the nosecone instead of on the housing, you get much more enhanced carving control. Other carvers have an hourglass shape that compromises your true tactile feedback and prevents your finger grip from obtaining tight detail work. The closer your grip is to the bur, the better.
The 10 exhaust ports are seated into the nosecone with indented flutes, channeling the air flow forward towards the carving surface blowing debris away from your carver and hand. This eliminates dust and air being blown back into your face. Instead, exhaust air keeps your carver and your work clean.
Once the air exited the impeller, the air needed to be vented from the tool. While it could be simple to just have a hole in the housing to let the air vent, there was a huge side effect -- noise! The noise from the tool needed to be reduced before venting. While some tools did nothing but just vent the air, other tools stuffed felt inside the housing to act as a muffler and absorb cleaner and/or oil lubrication. This might work for a while, but over long term, the felt became saturated with oil and leaked out Like its predecessor, the Vortex XJ7, the Vortex F5 extracts most of the energy from the air, the turbine whine is reduced considerably. The nosecone acts like a muffler, without felt, and is vented out the front of the tool via the 10 seated exhaust ports. This also blows carving dust away from your work.
Ultra High Speed Turbine
The turbine assembly is contained in a brass nosecone made of C360 brass. Inside the nosecone are the major components comprised of the bearings, spindle, impeller and manifold. The images to the left is an X-Ray view of the nosecone. At the center of the turbine is the spindle which is the shaft that spins. Inside the spindle, is the chuck which is a hollow tube which squeezes against the inserted bur and securely holds the bur in place. The outside of the spindle contain three parts, two of which are the bearings. The last part is the 24 vane impeller which is sometimes referred to as a rotor. These parts make up the turbine assembly and is usually just referred to as a turbine. The brass nosecone and turbine assembly moves the center of gravity towards the bur. This not only provides greater control, it reduces fatigue on the artist's wrist.
Internal Manifold Jets and Impeller
High speed carving tools are powered by directing a jet of high pressure air against the vanes on a circular disc called an impeller. Most carving tools use a single air jet. We found this type of design required more air at higher pressure. In addition, a single jet only exposed the impeller vanes to air only once per revolution, rendering them inefficient.
We decided to utilize 7 air jet port injectors, meaning that every time the impeller has spun one complete revolution, each vane received a "boost". This maximized the available energy extracted from the compressed air supply. By increasing the number of vanes to 24, we were able to provide a boost of 168 for every revolution of the impeller. This provided more power while using less air consumption making the Vortex F5 a much quieter tool than the other high speed carving tools on the market.
Turbine Spindle - Collet
The turbine contains a spindle, sometimes known as a "collet chuck", is a specialized type of clamp used to hold a 1/16" cutting bur. Inside the spindle is a collet with flexible sleeves or coil that squeeze firmly against the bur. Other carvers on the market use a "Friction Grip" spindle with internal leaf spring to press against the bur. This requires the bur to be pressed in to seat it and a plunger to press the bur out to release it from the carver. The Vortex F5 uses an auto chuck to insert and remove the bur. By using an auto chuck, the spindle will last much longer with repeated bur changes than a friction grip type spindle. The Vortex F5 spindle is design for optimum performance at ultra high RPM, even after thousands of bur changes.