Dental Handpiece Bearings

Ball bearings used in dental highspeed handpieces reduce rotational friction to allow the spindle/chuck assembly in the turbine cartridge (and the bur, when inserted) to spin at speeds from 250,000 to 500,000 rpms. This makes the highspeed dental turbine one of the fastest rotating devices in the world.

The highspeed ball bearing is comprised of:

A. Outer ring or outer race
B. Inner ring or inner race
C. Cage or retainer or separator
D. Balls
E. Shield

Common dental ball bearing designs

• Angular contact
• Radial or deep-groove

Outer ring has full shoulders and inner ring has a relieved and unrelieved shoulder. Features symmetrical cages that enhance performance and extend bearing life as each ball is fully supported and completely surrounded by the cage. Must be axially preloaded with springs or o-rings to ensure contact with the full unrelieved shoulder.

Angular Contact

Quieter operation and longer life

Higher cost

Should be handled by experienced technician

OEM preferred design

Radial Contact

Widely available

Lower cost

Easy to handle and install

Repair and third-tier manufacturer preferred

The balls roll between the inner and outer rings and can be made of steel or ceramic-hybrid.

Also called retainer or separator. Secures ball position between the 2 rings. It can be made of various materials (e.g. PAEK, Torlon, Phenolic). When the cage breaks, the bearing fails.

PAEK

PPS

Discontinued

Phenolic

Torlon

XTRAlon

See Radial

Extend high speed dental bearings provide the highest quality performance made to match or exceed the OEM specifications. With premium features like angular contact cages, ceramic balls and upgraded lubricants the Extend bearings is your go to for high end dental handpiece bearings replacement.

• German manufactured
• Unique designs to match OEM-bearings used in premium model high speed handpieces
• Next-gen angular contact designs incorporate special features to match or exceed OEM performance
• Available only with ceramic balls

• New generation cage material for maximum life, sustained autoclave resistance, and optimized performance under marginal lubrication
• Infused with premium lubricant developed for high end, high speed dental handpieces
• Supplied as singles

Inner portion of the ball bearing made of steel that press fitted onto the spindle/chuck and rotates along with the balls and the spindle/chuck assembly.

The balls roll between the inner and outer rings and can be made of steel or ceramic-hybrid.

Our Perfection high speed bearings were designed to offer the perfect balance between high quality build and reliability with a cost effective price point. They feature a PAEK (black) cage that are stronger and resist the sterilization process better than our older bearing design. With steel or ceramic options as well as a discount when buying in 10-packs these bearings are perfect for most high speed dental handpiece repairs.

• German manufactured
• Specifically designed for general use in high speed dental handpieces
• Common design, radial (deep groove) for easier handling and installation
• Available with either stainless steel or ceramic balls

• New generation PAEK cage for longer life, high sterilization resistance, and acceptable performance in poor maintenance environments
• Limited items with phenolic cage based on specific application requirements
• Infused with special lubricant developed for high speed handpieces
• Supplied as singles or in 10-piece multipacks at a lower per piece price

See cage

Helps prevent debris from entering the bearings and helps keep lubricant in.

Reduces suckback and minimizes debris entering bearing (need technical details about how many points of attachment and how better vs pressed slinger).

Helps prevent debris from entering the bearings and helps keep lubricant in.

Lubricant developed by GRW that optimizes lubrication conditions for highspeed applications ensuring adequate lubrication for the lifetime of the bearing.