Roller Bearing Sets FAQS

QWhat is the difference between Class P5 bearing and Ordinary Differences

AP5 bearings belong to precision bearings and are different from ordinary bearings as follows: 1, the size requirement value is not the same: products with high accuracy level have smaller size deviations(inner diameter, outer diameter, ellipse, etc.) than ordinary product requirements; 2, the required value of rotation accuracy is not the same: the accuracy of rotation of products with high accuracy level(inner radial beating, outer radial beating, end facing Raceway beating, etc.) is stricter than that required by ordinary products; 3, the required value of surface shape and surface quality is not the same: the surface shape and surface quality of a product with a high accuracy level(surface roughness of the Raceway or channel, circular deviation, groove deviation, etc.) are more stringent than those of ordinary products.; 4, performance is not the same: The accuracy of the product with a particularly high level of material than the ordinary product material performance is more favorable.

QWhat is Roller bearing unit?

AThe SKF roller bearing unit(the installed roller bearing unit) is a robust, faster-fitting bearing unit that uses original assembly, lubrication and sealing to maximize the bearing life. The advantages of the SKF roller bearing unit include: durability, high operating reliability, rapid installation, minimum maintenance, simplified replacement

QWhat is needle bearing?

AThe needle bearing is a roller bearing with a cylindrical roller. The roller is both fine and long relative to its diameter. This kind of roller is called a roller pin. Despite having a small section, the bearing still has a high load bearing capacity. The needle bearing is equipped with a thin and long roller(roller diameter D ≤ 5mm, L/D ≥ 2.5, L is roller length), so the radial structure is compact., Its internal diameter size and load capacity are the same as other types of bearings, and the outer diameter is the smallest. It is especially suitable for support structures with limited radial installation dimensions.

QWhat is Double row cylindrical roller bearings

ASKF super-precision double row cylindrical roller bearings are manufactured as standard in the NN 30 and NNU 49 series. Both series are available with either a cylindrical or a 1:12 tapered bore (designation suffix K). In machine tool applications, cylindrical roller bearings with a tapered bore are preferred over bearings with a cylindrical bore, because the taper enables more accurate adjustment of clearance or preload during mounting.