Mighty Way Industrial Limited (MTWB) is a Hong Kong–based bearing supplier specializing in precision miniature ball bearings, deep groove ball bearings, and custom OEM bearing solutions.

Over the last 30 years, our factories have accumulated vast bearing and application experiences in:

Manufacturing Excellence

MTWB bearing is produced by either manual or fully automatic lines to the standard of leading international OEM. Product reliability is ensured by advanced production equipment, complete range of testing instrument and a strong technical team.

Bearing Life

Larger sized bearings have a finite life under use and will eventually fail to perform satisfactorily due to an increase in noise and vibration, loss of running accuracy, deterioration of lubricant, or fatigue flaking of the rolling surfaces. Such failure modes are considered "normal" and can be predicted using standardized techniques. In addition to normal deterioration, bearings may fail due to heat seizure, fracture, scoring of the rings and other conditions caused by improper use, selection or maintenance of the bearing. Such failures are not normal and can only be avoided by careful handling and correct operation of the bearing in a given application. Never the less, under ideal working conditions, the so-called infinite bearing life is possible！

Torque

Small diameter ( < 20 mm OD) deep groove ball bearings have extremely low and uniform torque characteristics. Even when preloaded as part of an assembly, average torque levels of less than 0.5 gm-cm (0.007 oz-in) are common. Typically, torque is dependent on many factors, including ball size, number of balls, retainer type and looseness, radial play, lubricant type and fill percentage, and applied load.

Super Precision Miniature Bearings

MTWB continuously seeks for technical improvement and up till now can provide you with a full range of miniature bearings from 0.6-30mm ID (Designation: 68/0.6~6806 or RO~R10). Yes, as small as 0.6mm ID, up to ABEC-7 precision class! It is by far the smallest miniature bearing that you can find on earth. Our success for making this world’s smallest miniature bearing is originally driven by medical application, yet we believe this technology can also be extended to other industrial application. All our miniature bearings are made from international graded bearing steel to ensure their excellent loading and service life performance. Our miniature bearings are found everywhere for examples in micro motors, medical and aviation devices, instruments, meters, electronic devices, disc-driver, computerized sewing machines, robotic arm, drones, household appliances, office equipment and high-altitude weather monitoring devices.

Extra Low-Noise Small DGBB

MTWB deeply understands that different applications or industries have the same stringent requirement for bearing noise, such as electric motor, household equipment, automobiles, aviation and so on. Materials matter! That's why we choose only the finest bearing material, like G95Cr18, or GCr15 bearing steel or corrosion-resistant 300-series stainless steel. These top-graded materials ensure MTWB bearings are strong, durable, and whisper-quiet to perform flawlessly for long haul. One key factor to make a low-noise bearing lies in reducing vibration that relies much on our top-notch technicians to refine every possible way to grind the inner ring raceway of our low-noise bearings with minimal vibration – in fact, even to ensure they always exceed the industry standards by 2-3 dB! MTWB doesn't just say our bearings are quiet, we guarantee it. Firstly, we prevent dust and debris entering the interior of the bearing before sealing or shielding the bearing. Secondly, we use only good quality balls and grease that is another major factor influencing bearing noise. MTWB bearings are lubed with lithium-based grease for closed bearing. Special grease can be selected according to OE customer’s requirement. Finally, 100% inspection is conducted on the sealing effect of every bearing before it leaves the factory. In order to accurately grade the noise level of bearings, we strictly follow the testing specifications and make full use of noise testers and vibration testers for inspection. The noise detection of bearings is divided into Z1-Z4 levels, while the vibration detection levels are classified as V1-V4. OE customers usually have stricter requirement for bearing noise, yet they can select their acceptable noise level hence yielding the best cost advantage.

Special Dimension Bearings or Precision Components

Usually special dimension bearings or precision components are designed by OE customer for functionality or cost-saving reasons or both. MTWB can made-to-order according to customer’s print, or real sample provided. Your inquiry for this service is most welcome!

Mounting and Fitting

Many small bearing performance problems are caused by a lack of understanding of the effects of tight tolerances combined with the reduction in bearing radial play caused by interference with mating parts. Miniature bearings can have very thin inner and outer ring cross-sections (< .008" in some cases). When such a bearing is pressed onto a shaft or into a housing, depending on the material, up to 80% of the interference fit translates into loss of radial play in the bearing. For a bearing that has (say) .0002" to .0004" radial play in the first place, normal tolerance stack-ups can cause immediate bearing failure.

Packing

Industrial packing is applicable by default, special requirement should be mentioned when ordering. MTWB miniature bearings are usually put into plastic tubes or polythene bags and then packed in boxes or cartons.