GRW: Profit from High Performance with the new Q21-Ball bearings

Instruments, such as dental hand pieces set highest requirements towards the installed ball bearings. They must withstand high rotational speed and must be extremely resilient. In addition to this, they are supposed to be as quiet as possible, to assure an enjoyable treatment for the patient. We from GRW have developed our new Q21-ball bearings with special materials and innovative designs, which are convincing with their top-performance, even under difficult circumstances: Q21irac^®, Q21speed^® and Q21twin^®.

Q21irac^®: Innovative Deep Groove Ball Bearings prevent early wear

If standard deep groove ball bearings are working in tilting conditions, they are confronted with extreme constraining forces - and this can lead to an early bearing failure. But with its innovative Q21-features, GRW has developed special ball bearings, that set an ideal measurement, even despite of a tilting of the rotor shaft of the inner and outer ring. With the new deep groove ball bearings Q21irac^®, the set of balls moves nearly on an elliptical path, just like with a untilted bearing. Due to this, our GRW Q21-ball bearings are extremely quiet and do not wear off at an early stage. This is why you will profit from a significantly higher lifespan, compared to conventional radial deep groove ball bearings.

Q21speed^®: Innovative Design creates a Performance Increase

For deep groove ball bearings, which are utilized in high speed applications, GRW has developed the feature Q21speed^® - a new retaining cage design. This reaches a significant increase in performance regarding running friction and dynamic behavior. In addition, our patented ball-bag-design guarantees a lifespan increase and it runs very quietly. With this innovative Q21-feature, we can equip both snap cages in radial deep groove ball bearings and window cages in angular contact ball bearings.

Q21twin^®: Patented Cage Design for low ware and longer lifespan

With Q21twin^®, GRW has developed a new cage design, which combines the advantages of window cages und two-part cages made of sheet steel – so called steel tab cages. With this innovative technology, both cage halves are combined form-fittingly into one window-cage within one radial deep groove ball bearing. This new solution creates a noticeable increase in performance. Thanks to this combination, axial compensation is possible, even if the ball bearing is tilted. In addition, the GRW Q21-feature helps that external forces are intercepted on the cage. These positive characteristics reduce the ware within the ball bearing und create a longer lifespan of the application.

Download the whitepaper for the new Q21 ball bearings here.

XTRAIon – Our patented cage material

We have developed a premium material that enables applications in high-performance sectors. With our unique manufacturing methods, this exciting XTRA-material is produced as follows: A dry lubrication bonded chemically to the base polymer polyamidimide (PAI). This combination builds a homogenous structure that offers almost no surface contact during autoclaving. This creates following benefits:

• Incredible tolerance of high temperatures
• Minimized friction and wear
• Extended lifetime

Additionally, thanks to the chemical bond, the material offers outstanding characteristics when it comes to dry runs – even during extreme applications with speeds up to n x dm > 1,000,000 mm/min. Internally, we have observed lifetime test results up to 20 hours during absolute dry runs. Standard housing materials fail in such tests only after a few minutes.