WJB BEARING
Frequently asked questions
Common questions about WJB BEARING from 3G Electric.
What does 'unground' mean in WJB BEARING unground flanged radial ball bearings?
Unground refers to the manufacturing process where the bearing races (inner and outer rings) are not precision-ground after heat treatment. This results in a bearing with looser tolerances compared to ground bearings, but it also reduces production costs. WJB BEARING unground bearings are suitable for applications where precise rotational accuracy is not critical, such as conveyor rollers or agricultural equipment. The trade-off is lower load capacity and speed capability, but for many industrial uses, the performance is adequate.
What are the seal options available for WJB BEARING unground radial ball bearings?
WJB BEARING offers unground radial ball bearings in open (no seals) and double-sealed (2RS) configurations. Open bearings allow for easy lubrication but require clean operating conditions. Double-sealed bearings have rubber seals on both sides to retain grease and block contaminants like dust and moisture. The 2RS designation indicates the sealed version, which is preferred in dirty or wet environments. For example, the SKU 797WK2 (WF6464-2RS) is a double-sealed bearing, while SKU 797WK1 (UGF.375X1.125) is open.
What materials are used in WJB BEARING unground flanged radial ball bearings?
WJB BEARING unground flanged radial ball bearings are constructed with steel rings, as specified in the product data. The steel material provides standard strength and wear resistance for general industrial applications. The balls are also typically made of steel. The flanges are integral to the outer ring and are made of the same steel material. No other materials, such as stainless steel or ceramic, are indicated in the available product specifications.
How do I select the correct WJB BEARING unground bearing for my application?
Selection is based on three primary dimensions: bore diameter, flange diameter, and overall width. The bore diameter must match the shaft size (e.g., 1/4 in, 3/8 in, 1 in). The flange diameter determines the mounting hole pattern or housing fit. The bearing industry number, such as UGF.250X6.875, encodes these dimensions: the first number is the bore in inches, and the second is the flange diameter in inches. Also consider the seal type—open for clean environments, 2RS for contaminated ones. Verify the load and speed requirements against the bearing's rated capacity, which is typically lower than ground bearings.
Can WJB BEARING unground flanged radial ball bearings be used in high-speed applications?
No, WJB BEARING unground bearings are not designed for high-speed operation. The unground races have higher friction and less precise geometry, which limits rotational speed. They are best suited for low-to-moderate speed applications, such as conveyor idlers, caster wheels, and agricultural machinery where speeds are typically below 500 RPM. For high-speed applications, precision-ground bearings with tighter tolerances and higher speed ratings should be used.
Does 3G Electric supply WJB BEARING products?
Yes — 3G Electric (S) Pte. Ltd. supplies WJB BEARING products. We stock the WJB BEARING catalog and supply genuine factory-original products with full manufacturer warranty and technical support.
