1. Product Introduction

The 6206-OPEN is a single row deep groove ball bearing with the standard 30 × 62 × 16 mm boundary dimensions and a completely open (unsealed) design on both sides — no rubber seals and no metal shields. Both faces of the raceway are exposed, so lubricating oil or grease can circulate freely through the ball track, taking heat away from the contact zone instead of trapping it inside the bearing.

The rings and balls are made from GCr15 chrome bearing steel, hardened and tempered in a controlled atmosphere and then precision ground to P6 (ABEC-3) tolerance, with noise and vibration held at Z3V3 level. Because nothing covers the rolling elements, the bearing can be inspected, flushed and re-lubricated in place without being removed from the shaft, which keeps long-run production lines running instead of waiting for a spare part.

2. Product Features

• Fully open structure: no seal and no shield on either side, leaving the ball track open to the lubricant circuit and to visual inspection at any time.
• Efficient heat dissipation: circulating oil carries friction heat out of the bearing, so the unit keeps a stable running temperature during long continuous shifts.
• Re-lubrication on the shaft: grease or oil can be replenished through the open faces without dismantling the assembly, extending the practical service interval of the equipment.
• P6 (ABEC-3) precision: controlled raceway roundness and a tight bore and outside diameter tolerance band give accurate fit, low run-out and repeatable performance from batch to batch.
• Z3V3 quiet running: graded steel balls matched to superfinished raceways keep noise and vibration low, an important point for multi-spindle frames where dozens of bearings run side by side.
• Radial and axial load capacity: the deep, uninterrupted groove carries radial load together with moderate axial load in both directions, with Cr 19.5 kN and Cor 11.3 kN.
• Standard interchangeability: ISO 30 × 62 × 16 mm envelope allows direct replacement of open bearings from other suppliers, so no housing or shaft modification is needed.
• Low friction torque: with no seal lip dragging on the inner ring, starting and running torque stay low, which suits high speed idler and roller positions.

3. Product Advantages

Open bearings are the right answer where seals would do more harm than good. On the 6206-OPEN the absence of seal lips removes a major source of friction and heat, and it makes the bearing serviceable instead of disposable: maintenance teams simply top up or flush the lubricant and keep the machine in production. Each batch is checked for bore and OD tolerance, raceway roundness, hardness, noise and vibration before packing, so dimensional consistency across shipments is stable — useful when the same bearing is used on dozens of identical positions of one machine frame.

Factory-direct supply covers the full range of grades (P0 to P4), clearances C0, C2 and C3, stamped steel or plastic cages, and neutral or customer packaging, with stock ready for short lead times. For buyers who need to run a machine frame at high speed with oil lubrication and predictable maintenance intervals, the 6206-OPEN offers a simple, robust and low cost-per-hour solution.

4. Product Technical Parameters

5. Application Scenarios

6206-OPEN — shares the same 30 × 62 × 16 mm deep groove ball bearing envelope, so one dimension covers a very wide range of equipment. The 6206-OPEN is the unsealed version, chosen wherever the lubricant must circulate, heat must escape, or the bearing has to be re-greased in place. The main application scenarios are listed below.

Among these positions, the 6206-OPEN is most often specified for spinning frame rollers, oil-lubricated pump shafts, machine tool spindles and any transmission point connected to a central lubrication system, where the exposed raceway allows the oil to flow through the ball track and carry friction heat away. Sealed and shielded versions of the same 6206 envelope are used where dust, water or wash-down conditions dominate instead.

6. Company Profile

Ningbo Kent Bearing Company was established in 2003 and is one of the leading bearing manufacturers and exporters in China. Kent specializes in the design and production of high precision, high speed and low noise deep groove ball bearings and pillow block bearings. At present, the Corporation has more than 1,000 employees, a fixed assets of 2 billion yuan, and produces 250 million sets of bearings annually. The Corporation's products are widely used in more than 50 countries and regions under 2 independent brands, namely "BUGAO" and "NBKT".

Since 2003, the Corporation has set up a Research & Development Center equipped with multiple laboratories used for precision measurement, mechanical testing, lifespan testing, and physicochemical testing, to continuously upgrade its skills and raise its manufacturing standard and product's precision. Our workshops are installed with a series of advanced numerically-controlled, grinding and assembly equipment that utilize centralized filtration and cooling systems. Together with the production equipment suppliers, we developed these grinding, ultra-precision, fully automated integrated production lines, and own the intellectual property rights. The precision level of the products are at P5 level and above, with noise level reaching Z4, V4 and above. Some of our projects have exceeded the 30% precision reserves. Our products are widely used in electric motors, automobiles, motorcycles, household appliances, textile, electric tools and water pump equipment industries, both locally and globally.

The company has more than 20 assembly lines, and through ISO9001:2015 quality management system certification, has a professional technical and service team, technical personnel proportion of more than 30%. Over the years, we have been adhering to the use of high-end raw material production, from the first to every step, with excellent product development capabilities and strict quality control, we continue to expand the product line and application range.