The HM and HMZ series gear units are toothed, cylindrical geared motors, also commonly referred to as straight or linear, due to the transmission of the drive in one axis.
Looking closer at the documentation of the gearbox, we can see that the drive axle and the output axle are slightly shifted to each other, but visually they look coaxial.
The HM and HMZ series are the most popular series of gears available. It is distinguished by a compact structure, durable body, a wide range of gear ratios, sizes and versions of mounts. The HM and HMZ gearmotors are fully reversible.
A wide range of sizes of geared motors allows you to choose the optimal drive from small aluminum ones transmitting 20Nm to large cast iron ones with a torque of 5000Nm.
The range of gear ratios we offer in one body is from 1,3 to 680. Larger ratios are obtained by combining two gears.
We offer gearboxes in aluminum and cast iron housings, which are made by injection.
Aluminum bodies are vacuum impregnated, making them extremely tight and suitable for possible painting.
Cast iron casings are painted in a standard color from the RAL7046 palette.
The internal ribbing of the bodies allows the transfer of high forces and torques. External ribbing perfectly dissipates heat, so the reducer does not overheat.
Thanks to the helical (helical) teeth, which are ground after hardening, the gear transmits higher loads than the classic toothed gear with straight teeth and is also quiet. Thanks to the perfectly made teeth, the efficiency is up to 98%, which translates into energy savings.
For geared motors, we most often use alternating current electric motors flange mounted in the IEC standard. The transmission of torque can be by means of a clutch or classic - where the motor shaft is slidably mounted in the sleeve inside the gear. We also make adapters to connect servo (square) motors, hydraulic (oval), pneumatic and other motors after sending your drawings. For the adapters, we can use claw couplings that dampen vibrations and compensate for misalignment.
In the case of manual or belt or chain drive, we install a solid shaft instead of the standard motor connection. It is not a "glue" mounted shaft, which is the case with some manufacturers. It is a monolithic shaft with bearings and a pinion. Therefore, it cannot be pulled out, which may be dangerous to people or harmful to the machine.
One of the most interesting and practical things about HM reducers are the tightened mounting lugs. The customer can decide if he wants to mount the gearbox with lugs, mounting flange or if he wants to use tapped holes in the housing. In addition, we offer many types of feet, which are made in such a way that, after tightening them, the gear is a replacement for reducers from other manufacturers. This solution has been appreciated by companies providing maintenance services that need a quick replacement of reducers, and the manufacturer of the original drive offers several weeks of implementation. The gears are installed in our company overnight, and in the event of a breakdown, we can even make the gears on the spot. In addition, our gearbox in the same mounting can transfer a larger nominal torque than previously used, which is an excellent solution to avoid future failures and downtimes. Our gears are also easy to use in new devices. It is not necessary to change the mounting in the structure. Many manufacturers offer a monolithic mounting integrated with the body, which does not allow such operations, and in the event of damage to the feet, the entire gear must be replaced. If we do not have replacement feet on offer, we design and make dedicated, bent, milled or welded.
In the HM series, we can also make special mounting flanges according to the drawings sent.
It is worth mentioning that three sizes, such as HM-141, 191 and 281, can be used as gear adapters for worm gears. They are often used when we want to achieve a high gear ratio on the worm gear, thus avoiding self-locking and improving the efficiency and transferred torques.
We use top class bearings to ensure quiet and trouble-free operation. The range of transmitted axial and radial loads on output and drive shafts is included in the catalog. In the case of projects where the transmission of higher loads is required from the gears, we can use reinforced bearings.
Our gears are equipped with high-class seals. Simmerings have two lips: the inner one prevents oil from escaping, and the outer one provides protection against dust. In case of high temperatures, we provide installed Viton seals with better thermal parameters.
We also use Viton seals in explosion-proof versions. We can adapt the gears and provide the required certificates for the gas explosion zone 1 (ATEX II2G) and 2 (ATEX II3G) and dust zone 21 (ATEX II2D) and 22 (ATEX II3D).
In the case of food processing plants, where sanitary requirements are increased, we are able to fill the gear with food oil with appropriate certificates. Additionally, we can make the output shaft of stainless steel.
If the requirements are at the highest level, we encourage you to familiarize yourself with the CGT series transmissions, typically designed for food and chemical plants.
Proper operation of the gearbox at low temperatures is ensured by the use of a special oil.
Our geared motors work all over the world. They gained their popularity due to failure-free operation, attractive price, quick delivery times and the availability of spare parts.
