Miniature Precision Bearings

Providien has long been a leader in the precision bearings industry. We produce and supply more than 2 million bearings annually.

Our Dynaroll division manufactures and assembles our products to the highest industry standards.

Dynaroll has facilities located in Sylmar, CA, and Wuxi, China. Facilities located in Japan, Thailand, and Malaysia manufacture our miniature precision bearings.

Our Dynaroll division was founded in 1988. Since then, it has become a leading producer of precision bearings. They provide supplies to precision demanding industries such as:

• Medical
• Aerospace
• Automotive
• Computer peripheral
• Automation

Where Miniature Precision Bearings Work Best

Nearly every product that has moving parts contains a ball bearing.

Precision and high-performance industries require superior bearing performance.

Providien’s bearings are best employed in applications that demand:

• High Accuracy
• System Rigidity
• Low noise, heat, and vibration

Our strengths are in precision tolerances, quality materials, proprietary designs, and the highest industry reliability.

Our miniature precision Bearing Series Includes:

Standard Open Bearings BORE: .0400″ to .3125″ OD: .1250″ to .5000″	Flanged Open Bearings BORE: .0400″ to .3125″ OD: .1250″ to .5000″	Standard Shielded Bearings BORE: .0400″ to .3125″ OD: .1250″ to .5000″
Standard Sealed Bearings BORE: 1.5mm to 9mm OD: 4mm to 22mm	Flanged Shielded Bearings BORE: .0400″ to .3125″ OD: .1250″ to .5000″	Flange Sealed Bearings BORE: 1.5mm to 9mm OD: 4mm to 17mm

Bearing Options

Providien’s Dynaroll Division produces bearings with the following features:

Bearing Series and Styles

Dynaroll produces 15 different Bearing Series in 6 different styles. There are a wide variety of bearings designed for specific purposes. See the complete offering of bearings here.

The following 3 bearing series are available in all 6 different styles:

• Standard Open
• Flanged Open
• Standard Shielded
• Flanged Shielded
• Standard Sealed
• Flanged Sealed

Thrust Bearings

Bore: 3mm to 10mm
OD: 8mm to 20mm

Available in Chrome Steel and Stainless Steel

Thrust ball bearings contain two precision chrome steel washers (the ring). A retainer spaces the ball bearing component.

The bearings contain ball grooves in the rings for increased capacity. Thrust bearings are designed for use under purely axial loads.  

Collared Bearings

Bore: .1875″ to .5000″
OD: .6250″ to 1.1250″
ABEC 1 Tolerances apply except bore.
All set screws are hex socket type.

Flangette Collared Bearings

Bore: .2500″ to .5000″
ABEC 1 Tolerances apply except bore
All set screws are hex socket type
Housing material pressed steel
Bearing double-sealed
Bearing material 52100 chrome steel

Where Our Miniature Precision Bearings Are Commonly Found

Bearings find uses in scores of household items, from mixers to sliding drawers to your PC’s hard drive.

Every ball bearing is designed to handle specific amounts of radial and axial (thrust) loads. They typically transfer the load from the outer races to the balls, and then from the balls to the inner races.

Because balls are spherical, there are very few contact points on the inner and outer races.

What Our Products Are Designed to Do

Bearings are specified to handle certain maximum amounts of radial and axial (thrust) loads. Typically, they transfer their loads from their outer races to the balls, then from the balls to their inner races.

If a bearing gets overloaded, it can become deformed due to ball flattening. This will result in poor performance and eventual bearing failure.

Before selecting the part for your application, check load ratings and other parameters. This critical step will save your project from poor performance down the road.

Instrument-sized and miniature ball bearings are highly precise machined parts. They get manufactured with tolerances and raceway finishes measured in millionths of an inch.

While precise in their manufacturing, their small size and thin sections make them susceptible to excessive handling forces. These high-quality bearings cannot be expected to perform to their maximum potential if they become abused or contaminated.

Most small bearing failures trace back to the user’s poor handling and environment.

Designing your product with the right bearings is critical to your product success.

The Most Common Roller Bearings

The most commonly requested / design-in products are single-row deep groove ball bearings. They have a wide range of appropriate applications because they have:

• Low torque capacity at startup
• Low torque at running speeds
• Excellent performance in high-speed applications
• Remarkable radial load capacity
• Good axial load capacity bi-directional
• Low Noise Operation
• An almost maintenance-free track record

Designing Roller Bearings

Roller bearings have designs with raceway grooves on both inner and outer rings. These grooves have circular arcs that are of a slightly larger radius than the radius of the balls.

In addition to being designed to handle radial loads, they can handle axial loads in either direction. Because of their low torque design, they can offer high-speed operation with minimal loss of power.

We manufacture our instruments and bearings with the highest levels of accuracy.

Miniature Precision Bearing Case Studies

Below are a couple of examples of bearing production jobs from our manufacturing director:

Case Study 1

• Industry:  Robotic surgical instrumentation
• Part Specced:  SR168T12MC43DRY
• Material: Stainless steel
• Quantity:  >3,000,000 pc/yr
• Timing: 90 day manufacturing lead time, but we hold Kanban inventory

Case Study 2

• Industry: Surgical instruments
• Part Specced:  SR4ZZMC35PQMDXL
• Material: Stainless steel
• Quantity:  100,000 pc/yr
• Timing:  120 day manufacturing lead time