Deep Groove Ball Bearings

KIHOI supplies deep groove ball bearings for repair, maintenance, distribution, and industrial sourcing. Model, suffix, quantity, packing, and lead time are confirmed by quotation.

What Is a Deep Groove Ball Bearing?

A deep groove ball bearing is the most widely used rolling bearing type in industry. It consists of an inner ring, an outer ring, a cage, and a single row of balls running in deep, continuous raceway grooves. The deep raceway grooves let the bearing carry radial loads, axial loads in both directions, and combined loads — a versatility no other single-row ball bearing type matches.

Because of this design, deep groove ball bearings run at high speeds with low friction and low noise. They are the default choice for electric motors, pumps, fans, gearboxes, conveyors, and hundreds of other rotating machines.

6000, 6200, and 6300 Series at a Glance

KIHOI stocks the three most common metric deep groove series. All dimensions follow ISO 15:2011 boundary standards, so each model is directly interchangeable with the equivalent SKF, FAG, NSK, NTN, or Timken designation.

6000 Series — Compact and High-Speed

The 6000 series is an extra light duty deep groove ball bearing. It has a smaller cross-section than a 6200 or 6300 of the same bore, which keeps weight and space low. Typical uses include fractional-HP electric motors, office equipment, power tools, and household appliances. If the application demands compact dimensions and high rotational speed, the 6000 series is usually the right starting point.

6200 Series — The Industrial Default

The 6200 series is the most widely used deep groove ball bearing series in industrial applications. It offers the best balance of load capacity, speed capability, and dimensional economy — which is why it is the default bearing in electric motors, centrifugal pumps, compressors, and general machinery. Models such as 6204, 6205, and 6206 are among the most commonly replaced bearings in the world.

6300 Series — Higher Load Capacity

The 6300 series has a thicker cross-section (larger OD and width for the same bore) than the 6200 series, giving it higher radial load ratings. It is found in larger motor frames, industrial gearboxes, conveyor head pulleys, and applications where the extra load margin matters. If a 6200-series bearing is borderline on load rating, step up to the same-bore 6300 model instead of a larger shaft size.

Closure Options: Open, ZZ, and 2RS

Every model is available in three standard closures:

• Open — no shields or seals; lowest friction, requires external lubrication and clean operating conditions.
• ZZ (2Z) — two metal shields; keeps out coarse contaminants while retaining grease; suited to dry, low-contamination environments.
• 2RS — two contact rubber seals; the best protection against dirt and moisture; pre-greased and maintenance-free for most duty cycles.

The closure does not change the boundary dimensions (bore, OD, width), so an open 6205 and a 6205-2RS fit the same housing and shaft. Choosing between shields and seals is a function of the operating environment, not of the mounting dimensions.

Factory-Direct Supply from China

KIHOI is a bearing factory in China supplying deep groove ball bearings factory-direct to MRO and distribution buyers worldwide. Every quotation confirms the model, suffix, quantity, packing basis, and shipment terms — with low minimum order quantities. Send the complete part number and destination country to request a China factory-direct quotation, or open any model below to compare the full specification first.

Brand Cross-References

Because all KIHOI deep groove ball bearings are manufactured to ISO 15:2011 boundary dimensions, each model is a drop-in replacement for the same number from major brands. For example, a KIHOI 6205 replaces SKF 6205, FAG 6205, NSK 6205, NTN 6205, and Timken 205. Always compare the complete suffix (seals, shields, clearance, cage) against the original bearing before ordering. See the SKF bearing cross reference for the full interchange method.

How to Order

1. Find your model in the directory below, or search by part number.
2. Open the model page and confirm bore, OD, width, closure, and clearance.
3. Send quantity, target brand (or “no brand”), and destination country through the quotation form.
4. KIHOI confirms price, packing, and lead time — typically with a low minimum order quantity.

Every model page includes a specification table, brand cross-references with verification sources, and a quick quotation form pre-filled with the model number.

Available Series

Browse deep groove ball bearings by model and dimensions. Each model page includes specifications and brand-reference candidates for review.