Top 12 Mechanical Gears

Gears are something you find in engines, shop tools, toys, machinery, bicycles, and are located in garages, sheds, and sometimes even the kitchen. The primary function of mechanical gears is to transfer power (or torque) & motion between a machine's parts and function only in pairs – where one is typically bigger than the other. Mechanical gears are attached to the shaft, which further enables rotation and movement, and leads to torque transmission.

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Mechanical Gears Buying Guide

One significant advantage of using mechanical gears is that one can easily adjust the shaft's speed output – offering better control over the machine or tool. The configuration and construction of mechanical gears make them ideal for both industrial and domestic use. Plus, they have a simple but efficient design and are easy to install and use. However, there are several characteristics one should know about mechanical gears before buying them – and this guide will help buyers make an informed choice.

Types of Mechanical Gears

There are four to five mechanical gear variations, but the two most common types are spur and worm gears. Spur gears have a straight tooth design and are used to transfer motion from one shaft to the other. They have excellent machinability, high speed, and great efficiency rates but can produce noise when used for heavy-duty applications. On the other hand, worm mechanical gears have a screw-like (or worm) shape and have smooth & low noise operation. But worm gears require frequent lubrication and have lower efficiency rates. However, the choice ultimately depends on the application.

Which Material to Choose?

Like all other machine components, even mechanical gears are available in several materials, but the primary factor is always the purpose at hand. Mechanical gears made with metal, steel, or brass are usually bulky and heavy, making them better suited for heavy-duty machines and power and motion transmission. Such gears are typically used in industries due to their excellent corrosion resistance and high tensile strength. However, some mechanical gears are made with plastic, but those are suitable for lighter use and have several benefits, including low maintenance cost, chemical resistance, and flexibility.

More to Consider

When buying mechanical gears, one should choose the size only after taking accurate measurements. One must measure the size three-way – inner diameter, thickness, and hole diameter. If purchasing spur mechanical gears, you can also check the number of teeth. Many brands offer DIY gear assortment kits with all the necessary accessories, and those are an excellent purchase for experiments and model making. No matter which type of mechanical gear they go with, buyers should check other customer reviews & feedbacks plus the replacement/warranty period.