Bearing Components & Finishing Supplies

Bearing components are the individual parts that make up a rolling bearing: the inner ring, the outer ring, the rolling elements (balls or rollers), the cage, and the seals or shields. Finishing supplies are the stones and wheels consumed when those parts are machined.

NLHB is a bearing manufacturer. We turn, grind, superfinish and assemble bearings in our own plant in Ningbo, China. The components and stones on these pages are selected and inspected to the same standard we use for our own production, not resold from a catalogue.

We supply:

Bearing inner and outer rings (races): turned, heat-treated, or ground and superfinished.
Chrome steel bearing balls: GCr15 / AISI 52100 / 100Cr6 / SUJ2.
Stainless steel balls: hardened 440C, and austenitic 304 / 316.
Polymer bearing cages: PA66, PA46, PEEK and PAI.
Finishing supplies: raceway superfinishing stones and OD finishing stones for bearing rings.

Find the right product category

Bearing inner and outer rings

Turned, heat-treated and finished rings made to drawing. Fix the delivery condition first, then the material, raceway and inspection items.

Bearing Inner & Outer Rings →

Chrome steel and stainless steel balls

GCr15 / 52100 chrome steel balls and 440C, 304 and 316 stainless balls, ordered by material, diameter, grade and gauge.

Chrome Steel Bearing Balls →Stainless Steel Balls →

PA66, PA46, PEEK and PAI cages

Crown-type and machined polymer cages, selected by bearing design, temperature, speed and lubricant.

Polymer Bearing Cages →

Raceway superfinishing and OD finishing stones

Cubic silicon carbide (SC) raceway superfinishing stones and OD finishing stones for ring outside diameters.

Bearing Raceway Superfinishing Stones →OD Finishing Stones for Bearing Rings →

What parts make up a ball bearing

Part	Function	Common material	Key quality items
Inner ring	Mounted on the shaft, raceway on the outside	GCr15 / 52100 bearing steel	Bore size, raceway size and roundness, hardness
Outer ring	Mounted in the housing, raceway on the inside	GCr15 / 52100 bearing steel	OD size, raceway size and roundness, hardness
Balls	Roll between the raceways and carry the load	GCr15 / 52100, 440C	Grade, gauge, surface defects
Cage	Keeps the balls evenly spaced	Pressed steel, brass, PA66, PA46, PEEK, PAI	Pocket size, strength, clearance to the balls
Seals / shields	Keep dirt out and grease in	NBR with steel insert, steel sheet	Lip interference, correct seating

Rings and balls set the accuracy and life of the bearing. The cage sets its speed and lubrication tolerance. The superfinishing stone sets the final raceway surface.

HS codes for bearing components

Common customs classifications are shown below. They are a starting point only; your customs broker must confirm the code for the actual product and destination.

Product	Common heading	Note
Balls, needles and rollers shipped separately	8482.91	Low-precision steel balls may fall under 7326
Rings, cages and other bearing parts	8482.99	Some tariffs list ball bearing races separately
Superfinishing and honing stones	Subheadings of 6804	The exact subheading is confirmed by your customs broker for the actual product

Start with the information you have

Any one of the following is enough to start:

A drawing with its number and revision.
A photo of the complete label on the part or stone you use now.
A sample, plus the bearing type or machine it is used on.
If you only have a bearing number: which part, how many, and for what equipment.

For components we confirm fits and inspection items. For stones we confirm the operation and the trial-grinding conditions.

Frequently asked questions

What are the components of a ball bearing?

An inner ring, an outer ring, balls, a cage, and usually seals or shields. Stones and grinding wheels used to make these parts are finishing supplies, not bearing components.

Can I buy rings, balls or cages without complete bearings?

Yes. Rings, balls, cages and stones can each be quoted separately in the quantity you need.

Are you a factory or a trading company?

NLHB is a bearing factory. Ring turning, grinding, raceway superfinishing and assembly are done in our own plant, and we specify and inspect components to our own production standard.

Can I request a quote with incomplete information?

Yes. Send what you have: a part number, sizes, photos or a sample. We will list the missing conditions and quote once they are confirmed.