Here you can buy gears and racks in many different sizes and with a wide variety of tooth counts. The racks are available in sizes M1, M2, M2.5, M3, and M4, and they are often used in systems and machines in the industry.
At Ahlsell, we have an extensive product range of racks that cover all the standard needs required to perform a professional job.
Remember that Ahlsell provides both materials and service concepts suitable for the industry, all at competitive prices and with good service.
Discover our range of gears
At Ahlsell, we offer a wide range of cylindrical gears that can be beneficial in many situations. The gears can be found with external teeth as well as with straight or helical teeth. No matter what type you need for your work, you can find a gear that is made with precision and high quality.
Gears are used in transmissions where rotational energy with one angular frequency and torque is converted into rotation at other angular frequencies and torques.
In general, it applies that if a larger gear drives a smaller gear, you get a higher angular frequency and lower torque. The opposite occurs when a smaller gear drives a larger one - namely lower angular frequency and higher torque.
What are gears used for?
Gears are used in pairs so that the teeth of the two gears engage with each other. When one gear is rotated, the rotation is thus transferred to the other gear.
Additionally, gears are commonly used to connect two shafts with the purpose of, for example, transferring forces and torques, altering gear ratios, rotational speed, or direction of movement. This can include applications in gear systems, clocks, hoisting equipment, or as intermediaries between power and work machines such as chain systems or turbines.
Other applications of gears can be as a link in the transfer of traction in a gear track or in a car's steering mechanism using a standard gear engaging with a rack or for pumping fluids in a gear pump.
What types of gears are there?
There are several different types of gears. Gears can include conical gears, cylindrical gears, and mini gears. At Ahlsell, we exclusively offer cylindrical gears.
The working surfaces of the teeth are called flanks, and the gear's teeth and the gaps between the teeth together are called the gearing. If the gear is shaped like a ring with inward-facing teeth, it is referred to as an internal gearing. This is in contrast to external gearing, where the teeth are on the outside of the ring. Internal gearing is used when the same direction of rotation on the shafts is desired or simply due to space considerations.
Depending on the positions that the shafts with the gears have relative to each other, they can be classified as:
- Cylindrical gears - where the shafts are parallel
- Conical gears - where the shafts intersect, typically at a right angle
- Hyperbolic gears - where the shafts do not intersect, and these resemble conical gears
Cylindrical gears can be designed with helical teeth, which provide a transmission that is smoother and less noisy than a transmission with straight teeth. The reason for this is that with helical teeth, more teeth are engaged simultaneously. By combining helical teeth with wide gears and slightly screw-shaped teeth, the connection can be used for power transfer between fast- and slow-running shafts - for example, in turbines.
Gear transmissions are constructed based on circles that are tangent to each other. The shape of the teeth is described by the flank curve, which in most cases is a circular develops. Teeth with this shape are called involute teeth, but other forms such as cycloidal or Novikov gearing are also used. Novikov gearing is a Russian invention that can transmit double the loads of involute teeth with the same dimensions.
Gears are characterized in the metric system by the module. For two gears to fit together, the module and flank curve must be identical. In England and the USA, the pitch system is used with measurements in inches in a similar style to the module system.
How gears are manufactured
The manufacturing of the gear's relatively advanced tooth geometry is now carried out using computer-controlled lathes and milling machines from raw materials like cast iron, special strength steel, aluminum, and other metals.
It is also possible to manufacture raw gears through powder pressing or forging. Gears for lower loads with requirements including low weight are typically made from injection-molded plastic materials, which are then further processed to achieve the correct tooth geometry. The teeth are formed using either a face mill that has the tooth profile or by other milling methods.
Ahlsell is your supplier of gears
We have everything related to gears. Find everything for your project in Ahlsell's webshop - around the clock. Timely delivery is a given. When you shop at Ahlsell, you can have your products delivered in several different ways. You can see which delivery method suits your needs best here.
We have years of experience with products from various leading manufacturers. Therefore, you can also count on us to provide good service and guidance when you need to order the right gears at your nearest Ahlsell store. If you need guidance regarding the products, you will experience professional competence and good service if you call our sales department or seek advice in one of our 34 stores across the country.
You can choose to have your orders delivered to your business, construction site, or any other location. This can be done with FlexBox, for example. You can also simply reserve the items at your nearest Ahlsell store. After a short time, your gears will be ready for pickup. If you have questions about our range or delivery, you are always welcome to contact us right here.
FAQ:
What are gears made of?
- The manufacturing of the gear's relatively advanced tooth geometry is now carried out using computer-controlled lathes and milling machines from raw materials like cast iron, special strength steel, aluminum, and other metals. Gears for lower loads with requirements including low weight are typically made from injection-molded plastic materials. The teeth are formed using either a face mill.
Where are gears used?
- Gears have many applications. They can be found in gear systems, clocks, hoisting equipment, or as intermediaries between power and work machines, including chain systems or turbines. Other possibilities include serving as a link in the transfer of traction in a gear track or in a car's steering mechanism using a standard gear engaging with a rack.