TIMKEN High-Speed Dental bearings
TIMKEN Dental bearings provide manufacturers and dentists with a new standard in handpiece performance — higher speeds, smoother operation, longer life and reduced maintenance.
TIMKEN High-Speed precision dental bearings are available with a choice of five different ball cage materials to meet the complete range of high-speed operating environments. And, while these bearings are competitively priced, they deliver better, long-term performance than other precision bearings.
Timken´s N-DURTM Steel, a revolutionary new stainless alloy that is harder and more corrosion resistant than standard 440C steels. N-DUR is made through a special process that ensures the even distribution of tiny carbon particles throughout the alloy, this gives bearings machined from N-DUR a superior raceway finish to provide smoother operation.
Outer Ring Ball Cage Piloting Improves Performance By piloting, or guiding, the ball cage on the outer ring, rubbing velocity is reduced by 15% and cage stability is enhanced. While this requires greater precision in manufacturing than inner ring piloting, it is a key factor in prolonging ball cage life, the leading cause of dental bearing failure. At the same time, outer ring piloting utilizes centrifugal effects to direct lubricant to where it is most needed.
7-Ball Complements Extend Life Flexible 0-ring seating frequently causes bearing misalignment when the outer ring cocks or tilts relative to the inner ring. To alleviate this, Minasure RPM bearings utilize Timken’s unique 7-ball geometry to minimize these damaging effects. This geometry is more forgiving toward misalignment than conventional 8-ball complements. At the same time, this geometry leaves more material between the ball pockets for greater cage strength.
Precision That Exceeds ABEC 7 Standards
While some dental bearings meet ABEC 7 standards, Timken has raised the bar. The critical components of TIMKEN HS bearings — including balls and bore dimensions — meet ABEC 9 standards. Only the highest precision balls meeting the Grade 3 standard are used in these bearings. In addition, Timken cut the bore diameter in half from .0002 to .0001 inches to ensure better fit, reduce radial play variation and lessen vibration and noise. To meet these tolerances, Timken had to develop manufacturing processes that set a new standard for quality and precision. As a manufacturer with ISO 9001 registration and AS9000 and DI-9000 AQS certifications, the Timken Dental Business Unit has the quality control programs in place to deliver high-speed dental bearings that ensure total customer satisfaction.
Cage Materials to Match Application Needs
Cage wear and fracture are the leading causes of bearing failure. For that reason it is critical that wear and autoclave resistance, as well as price, be considered in choosing cage materials for a particular operating environment. The Dental Business Unit now offers five different cage materials.
EverclaveTM
EverclaveTM cages are made from a proprietary material that provides by far the best combination of wear and autoclave resistance. Everclave cages significantly extend the life of dental bearings subject to constant sterilization without sacrificing wear resistance or being overly dependent on difficult-to- follow maintenance protocols.
MinawearTM
MinawearTM is a self-lubricating, modified Phenolic material with lower frictional characteristics and better autoclave resistance than standard Phenolic. Special additives nearly double the wear resistance of Phenolic without sacrificing its self-lubricating properties.
MINIPAR IIITM
MINIPAR IIITM cages offer a proven combination of wear and autoclave resistance at competitive prices. Using an exclusive Timken technology, Minapar III cages are molded from a polyamide resin impregnated with special lubricants and reinforced with carbon fibers. The molding process creates a unique geometry that Relieved improves high-speed stability by interrupting frictional contact with the outer ring.
Torlon
Torlon (Polyamide-imide) provides very good autoclave resistance v~hen proper maintenance protocols are followed.
Phenolic
Phenolic is a good choice for operating environments with minimal heat or chemical sterilization.
It will maintain low friction characteristics even in the absence of proper lubrication.
Lubrication with Minapure® Grease
Timken research has shown that grease can enhance the life of high-speed bearings as it is less likely to dissipate at high speeds. Timken’s new heat-resistant Minapure handpiece grease is designed to stand up under repeated sterilization. It is an inert, non-toxic synthetic that’s specially formulated to help ensure that handpieces will run smoothly and reliably.
A Choise of Angular Contact and Radial Configurations
Angular Contact Bearings feature symmetrical cages. These enhance performance and extend bearing life as each ball is fully supported and comptetely surrounded by the cage. Angular contact bearings must be axially preloaded with a spring or 0-rings to assure contact with the full unrelieved shoulder.
Radial Bearings are less expensive and easier to work with than angutar contact bearings. They have full shoulders on both the inner and outer raceways so they won’t disassemble during handling and instatlation in the handpiece.
- Determine part number by matching size, configuration (angutar contact or radial) and features (smooth, flanged or grooved) to setection guide.
- Add a digit representing desired cage material:
- 5 - Everciave
- 4 - Minawear
- 3 - Minapar Ill
- 2 - Torlon
- 1 - Phenolic
- Add a letter to indicate desired lubrication:
- L-Oil
- G-Grease
Minasure® LTL LifeTimeLube Bearings
Minasure® LTL LifeTimeLube bearings are the first high-speed, self-lubricating dental bearings to combine superior wear resistance with exceptional autoclave resistance. These new premium bearings raise handpiece standards: smoother operation, longer life and maintenance-free performance.
Available in a range of sizes and configurations to fit most existing high-speed handpiece designs, Minasure LTL bearings address a real needs of cosmetic dentistry market.
They let dentists and hygienists focus on patient care. Dental professionals no longer have to purge and lubricate handpieces to maintain optimum performance. Hygienists spend less time on handpiece maintenance and have more time to spend on periodontal maintenance and scaling.
Minasure® LTL Bearings Have Minawear Cages
Minasure LTL cages are made from Minawear, a self-Lubricating, modified Phenolic with special additives to Lower frictional characteristics and provide belier autoclave resistance. Minawear cages have nearly double the wear-resistance of Phenolic without sacrificing its self-lubricating properties.
Precision Integral Shield
Minasure LTL bearings contain an integral shield that minimizes the gap on the inner ring, preventing lubricant loss and contamination from entering the bearing.
Angular Contact Design Extends Bearings life
Unlike radial bearings, Minasure LTL bearings feature symmetrical cages. Timken’s angular contact design enhances performance and extends bearing life because — unlike radial designs — each ball is fully supported and completely surrounded by the cage.
Greater Precision Lessens Vibration and Noise
Tighter tolerances ensure better fit, reduce radialplay variation and lessen vibration and noise to ensure greater customer satisfaction. The critical components of Minasure LTL bearings meet ABEC 9 specifications.
In a conventional bearing, the shield protecting the balls is held in place by a shield wire. In Minasure LTL bearings, the shield is an integral part of the outer ring. This results in a far tighter tolerance that keeps contaminants out. In combibation with Timken’s exclusive self-lubricating cages, this results in the first truly Maintenance Free handpiece bearing. Available in smooth, flanged or grooved configurations.
