Worm Gear Unit With B5 Flange
Model Description of Worm Gear Unit with B5 Flange
RV 063-40-E-FA1-AS1 71B5 B3 -0.37-4 / 1
① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩
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NO. |
Comments |
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1 |
Model Code: RV: Hole input with flange V: Shaft input without flange |
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2 |
Central distance of worm wheel and worm shaft |
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3 |
Ratio of reducer (I=7.5; 10; 15; 20; 25; 30; 40; 50; 60; 80; 100) |
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4 |
1) No mark means without output flange 2) E: Double extension worm shaft |
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5 |
1) No mark means without output flange 2) FA, FB, FC, FD, FE(1/2): output flange and position |
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6 |
1) No mark means hole output 2) AS(1/2): Single output shaft and position 3) AB: Double output shaft |
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7 |
Normalized form of input flange (without motor) |
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8 |
Installation position code |
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9 |
1) No mark means without motor 2) Model motors (poles of power) |
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10 |
Position diagram for motor terminal box, default position 1 can be no mention |
Characteristics for Worm Gear Unit with B5 Flange:
The meshing of the worm and the gear is a mixture of sliding and rolling actions, but sliding contact dominates at high reduction ratios. This sliding action causes friction and heat, which limits the efficiency of worm gears to 30 to 50 percent. In order to minimize friction (and therefore, heat), the worm and gear are made of dissimilar metals – for example, the worm may be made of hardened steel and the gear made of bronze or aluminum.
Although the sliding contact reduces efficiency, it provides very quiet operation. (The use of dissimilar metals for the worm and gear also contributes to quiet operation.) This makes worm gears suitable for use where noise should be minimized, such as in elevators. In addition, the use of a softer material for the gear means that it can absorb shock loads, like those experienced in heavy equipment or crushing machines.
The primary benefit of worm gears is their ability to provide high reduction ratios and correspondingly high torque multiplication. They can also be used as speed reducers in low and medium speed applications. And, because their reduction ratio is based on the number of gear teeth alone, they are more compact than other types of gears. Like fine-pitch lead screws, worm gears are typically self-locking, which makes them ideal for hoisting and lifting applications.
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