Metric Worms and Worm Gears
Description
Metric Worms and Worm Gears are mechanical components used to transmit motion and power between non-parallel, non-intersecting shafts. The worm is a helical threaded shaft that meshes with the worm gear, which is a cylindrical gear. This configuration allows for a compact design that can achieve high reduction ratios.
Working Principle
The working principle of worm gears involves the meshing of the worm and the worm gear to achieve a reduction in speed. The worm, which is a helical threaded shaft, engages with the teeth of the worm gear. As the worm rotates, it pulls or pushes the worm gear, causing it to rotate. This mechanism is particularly useful because it allows for significant speed reduction while proportionally increasing torque. Additionally, worm gears are known for their smooth and quiet operation due to the sliding action in the mesh, which reduces vibrations.
Applications
Worm gears are widely used in applications where large speed reduction ratios are desired. Specific examples include electric winches and capstans, where the self-locking feature of worm gears is advantageous. They are also commonly used in escalators, where the smooth operation and self-locking capabilities ensure safety and comfort.
Advantages over other Worms and Worm Gears
One of the key advantages of worm gears is their self-locking capability at certain gear ratios, typically over 30:1, with full self-locking occurring around 60:1. This feature is particularly beneficial in lifting applications, such as escalators, where it prevents reverse driving and ensures safety. Worm gears also offer a compact design, making them suitable for installations with limited space, and they provide a smooth, vibration-free operation compared to other gear types like helical gears.
Limitations
Worm gears have some limitations, including lower mechanical efficiency compared to other gear types. They are also heavier, more expensive, and can be difficult to mount. The sliding action that provides smooth operation also results in higher friction, which can lead to increased wear and reduced efficiency.
Considerations
When considering the use of worm gears, it is important to account for initial costs, which can be higher due to the complexity of the design and materials used. Operating expenses may also be higher due to the lower efficiency and potential for increased wear. However, worm gears are known for their durability and can withstand heavy loads and harsh operating conditions with minimal maintenance if properly lubricated. Replacement and maintenance costs should be considered, as the self-locking feature and compact design can reduce the need for additional components, potentially offsetting some of the initial and operating costs.
from RS Components, Ltd.
Worm gear 0.8 module 2 starts [See More]
- Design: Metric
- Direction: Right
- Gear Type: Worm
- PD: 14
from KHK USA, Inc.
Economical, commonly used worm wheels that have broad utility. Available with a large selection of modules and number of teeth. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- Pressure Angle: 14.5°; 14.5 º
- Number of Teeth: 20
- PD: 7.91
from Hangzhou Chinabase Machinery Co., Ltd.
China Gears and racks manufacturer, we can supply: Spur Gears, Bevel Gears, Worm Gears, Helical Gears, Automobile Gears, Agricultural machinery gears, Spiral Bevel Gears, Helical Bevel Gear, Rack. [See More]
- Design: Metric
- Number of Teeth: 1 to 4
- Gear Type: Worm
- Gear Center: Center Bore
from RS Components, Ltd.
Worm gear 1.0 module 1 start [See More]
- Design: Metric
- Direction: Right
- Gear Type: Worm
- PD: 16
from KHK USA, Inc.
Made of aluminum bronze, have excellent wear-resistance. Wide selection is available for this item. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- Pressure Angle: 20°; 20 º
- Number of Teeth: 20
- PD: 0.39
from RS Components, Ltd.
Worm gear 1.0 module 2 starts [See More]
- Design: Metric
- Direction: Right
- Gear Type: Worm
- PD: 16
from KHK USA, Inc.
Duplex worm wheels made of aluminum bronze, excellent in wear-resistance. The pitch accuracy is first grade. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- Pressure Angle: 17.5 º
- Number of Teeth: 20
- PD: 1.18
from RS Components, Ltd.
Worm gear 0.8 module 1 start [See More]
- Design: Metric
- Direction: Right
- Gear Type: Worm
- PD: 14
from KHK USA, Inc.
Made of aluminum bronze, have excellent wear-resistance. Allows compact design. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- Pressure Angle: 20°; 20 º
- Number of Teeth: 20
- PD: 1.57
from KHK USA, Inc.
Aluminum bronze made products have excellent wear resistance. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- PD: 0.72
- Pressure Angle: 20°; 20 º
- OD: 0.8020
from KHK USA, Inc.
Phosphorous bronze worm wheels have excellent wear resistance. Interchangeable with CG Worm Wheels, and enhances strength. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- Pressure Angle: 20°; 20 º
- Number of Teeth: 20
- PD: 0.39
from KHK USA, Inc.
Fine pitch worm wheels made of polyacetal, a stable plastic material. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. Notice: This product is discontinued, but does have an alternate. Please see the... [See More]
- Design: Metric
- Pressure Angle: 20°; 20 º
- Number of Teeth: 20
- PD: 0.39
from KHK USA, Inc.
Grounded finished worms with a shaft, including tooth surface quenching treatment. Allows compact design due to having small reference diameters. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- Material: Steel; SCM440 (AISI 4140) Alloy Steel
- Pressure Angle: 20°; 20 º
from KHK USA, Inc.
High-precision duplex worms with superior strength. A range of backlash values can be obtained by moving the worm axially. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- Material: Steel; SCM440 (AISI 4140) Alloy Steel
- Pressure Angle: 17.5 º
from KHK USA, Inc.
Light weight and strong MC Nylon worm wheels. Suitable for use in food machinery, and can be used without lubricant. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- Pressure Angle: 20°; 20 º
- Number of Teeth: 20
- PD: 0.79
from KHK USA, Inc.
Light-weight products made of MC Nylon can be used without lubrication. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- Pressure Angle: 20°; 20 º
- Number of Teeth: 13
- PD: 0.72
from KHK USA, Inc.
Popular screw gears. Additionally, gear tooth induction hardening secondary operations can be performed. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- Pressure Angle: 20°; 20 º
- Number of Teeth: 13
- PD: 0.72
from KHK USA, Inc.
Suitable for food machinery due to SUS303's rust resistant qualities. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- Pressure Angle: 20°; 20 º
- Number of Teeth: 13
- PD: 0.72
from KHK USA, Inc.
Rust-resistant worms made of stainless steel suitable for mating with DS or PG worm wheels. Finished products for the J Series are also available. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- Material: Steel; Stainless; SUS303 (AISI 303) Stainless Steel
- Pressure Angle: 20°; 20 º
from KHK USA, Inc.
Economical, commonly used worms that have broad utility. Ready-to-use finished products from the J Series are also available. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- Material: Steel; S45C (AISI 1045) Carbon Steel
- Pressure Angle: 20°; 20 º
from KHK USA, Inc.
Reasonably priced ground worms. Ready-to-use finished products from the J Series, are also available. Please note that all J-Series, E-Series, F-Series, H-Series, HJ-Series & S-Series products are made-to-order, noncancellable, and non-returnable. [See More]
- Design: Metric
- Material: Steel; S45C (AISI 1045) Carbon Steel
- Pressure Angle: 20°; 20 º
from ATLANTA Drive Systems, Inc.
Atlanta standard worm drives are manufactured from well- proven materials. The worm is of steel and has hardened and ground fanks. The worm gears are of special gear bronze and are provided with a grey cast iron hub in the case of larger diameters. All standard drives available from stock are of the... [See More]
- Design: Metric
- Number of Teeth: 27
- Gear Type: Worm; Worm Wheel
- Direction: Right
from Kinematics Manufacturing, Inc.
Reliability. Kinematics slewing drives are designed and tested to guarantee a 30-year field life. All aspects of engineering control are based on creating a low-cost, reliable solution. Using the same methods and procedures that earned us our ISO 9001, CE, REACH, and TUV certifications, we qualify... [See More]
- Design: English; Metric
- Gear Type: Worm; Worm Wheel
from Ondrives.US Corporation, formerly Rino Mechanical
Ondrives.US has been designing, engineering, and manufacturing gears, gearboxes, and other motion transfer components for decades. If none of our standard gear options are right for your application, we can produce custom gears that meet your specifications. We can work from your part prints, or... [See More]
- Design: English; Metric
- Features: Anti-backlash
- Gear Type: Worm; Worm Wheel
from QTC METRIC GEARS
Module 1.5, 1 Start Right Handed Ground Steel Worm Shaft [See More]
- Design: Metric
- OD: 28
- Pressure Angle: 20°
- Face Width: 40
from Shenzhen Besta Precision Machinery Co., Ltd.
Worm gear is one of gear type which mating with a worm to greatly reduce rotational speed, or allowing higher torque to be transmitted. this type of gear can gain higher gear ratio than spur gears of the same size. worm gear can be made from different material according to end application, some... [See More]
- Design: Metric
- Module: 0.5 - 6
- Gear Type: Worm
- Material: Aluminum; Brass; Cast Iron; Stainless; Delrin
from Renold Canada
Holroyd Tooth Form. The Holroyd Toothform corresponds to the recommendations of British Standard 721 but, in addition, has an exclusive feature which consists principally of important modifications to the worm thread and wheel tooth. These alterations confer additional valuable properties to gear... [See More]
- Design: English; Metric
- OD: 88
- Gear Type: Worm
- OD: 2235
from QTC METRIC GEARS
Module 2, 20 Tooth, 1 Start, Left Handed Bronze Worm Gear with Plain Bore [See More]
- Design: Metric
- Pressure Angle: 20°
- Number of Teeth: 20
- PD: 40
from Renold Canada
Dual lead wormgears, as their name suggests, are constructed with two leads. One flank of the worm thread and its mating sides of the wheel teeth are manufactured with one lead, and the other flank and its mating wheel teeth to a slightly different lead. As far as the worm is concerned this has the... [See More]
- Design: English; Metric
- Gear Type: Worm
from QTC METRIC GEARS
Module 1, 20 Tooth, 1 Start, Right Handed Aluminum Bronze Worm Gear with 6mm Finished Bore [See More]
- Design: Metric
- Pressure Angle: 20°
- Number of Teeth: 20
- PD: 20