Now, we can see that on the single phase motor, a three-phase motor cost changed, its cost is reduced, the complexity of mechanical transmission has also been reduced at the same time, we have some can be used for fpc1 dollars have been saved. So, relatively small is the increase in costs. Both fpc2 are still required for the speed range required, but it is much simpler than the 6-8 or 12-speed fpc3 common in most small milling machines.
Gears provide a reasonable way is, at the time of low speed, high torque is provided, but the gear will also be changed accordingly, more trouble when we asked the output shaft to more than 2500 RPM. If it is at 3,500 RPM, the oil bath will be soaked by a standard gearbox and the oil will be heated to over 250 degrees. If it reaches 4,000 revolutions per minute and can exceed the viscosity of the oil, up to 1.25 horsepower of water can be absorbed, which leaves a small amount of energy left on the tool. At the same time, it is very noisy and standard fpc3. Here, our assessment of the gearbox is not a simple conjecture. Two early design fpc5 prototypes were included in the development of fpc1.
There are some problems that can be eliminated with a dedicated lubrication of fpc6, but the cost of elimination is high. Perhaps the greatest penalty for them when they fail is the biggest restriction on fpc2. If there is a loosening of fpc6, usually the failure is catastrophic: we need to replace the complete set of equipment. We know that a glitch, a problem is more common, and this is a trend, a tendency for gearbox oil to seal the leaking oil. , of course, the problem is not caused by the slow speed gearbox, but when the increase of the output shaft speed, the friction or high heat sealing spring seal need to be you, or, light oil seal and the rotor pressure leak risk to have.