SKF QJ 306/P63VG003 angular contact ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Angular contact ball bearings
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Description
SKF QJ 306/P63VG003 belongs to angular contact ball bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for QJ 306/P63VG003 and any equivalents.
The SKF QJ series is a four-point contact ball bearing designed to handle radial and axial loads in both directions. Its split inner ring and single row of balls make it suitable for assemblies where combined forces must be managed with precision and rigidity, such as machine tool spindles, pumps and gearboxes. MR Industrial Accessories supplies this bearing as part of its SKF line to customers across the United States and Latin America.
Reading a QJ designation: the letters QJ denote a four-point contact ball bearing with a split inner ring. The digits that follow correspond to the bore size under the SKF coding system—for instance, QJ 306 has a 30 mm bore. Suffixes then add detail: P6 sets dimensional and running tolerance to class 6, VG003 indicates a high-temperature grease, and a trailing 3 can point to a cage or internal design variation. Always confirm the complete code before ordering.
These bearings appear in demanding positions: milling and grinding machine spindles, process centrifugal pumps, screw compressors, high-ratio gearboxes, material handling equipment and textile machinery. Because they accept axial loads in both directions, they fit arrangements where one bearing row must carry combined forces.
When selecting a QJ bearing, review load magnitude and direction, operating speed and ambient conditions. Check that internal clearance matches the application, and decide between grease or oil lubrication; shields are available in some cases. During mounting, align the rings carefully and avoid impacts that could harm the raceways. Use the specified lubricant and renew it on schedule.
Equivalents from other manufacturers may work if dimensions and tolerances align, but verify the full designation and service conditions first. For replacements, send the code etched on the bearing so the exact variant can be identified. To request a quote, contact MR via WhatsApp or email with the complete part number; the team responds promptly and can suggest equivalents or help with selection.
Dimensions
Dimensions and tolerances: Message us the part number on WhatsApp and we'll verify its dimensions and version with the manufacturer's datasheet.
Frequently asked questions
- What does QJ mean in an SKF bearing?
- QJ identifies a four-point contact ball bearing with a split inner ring that supports axial loads in both directions. The number that follows indicates the bore diameter per SKF coding.
- How do I choose the right suffix?
- Suffixes cover tolerances, internal clearance, lubrication or cage design. For example, P6 is tolerance class 6 and VG003 is a special grease. Base your choice on load, speed and temperature conditions.
- Can I interchange this bearing with another brand?
- It may be interchangeable if dimensions and tolerances match, but always verify the complete designation. Send the code engraved on the bearing to MR via WhatsApp to confirm the equivalent.