Grace ladder develop new sealed ball bearings

Er ladder er of rotation resistance decreased speed for sealing type deep groove ball bearings. Both rotate the "open" of low resistance and prevent foreign body ability strong "seal model" the advantages of two kinds of bearings.
So far, the speed for bearing in attaches great importance to the torque when using "open bearing", and emphasized to prevent foreign body intrusion use "sealed type bearings". Open bearings for not seal so rotational resistance is low, but there is foreign body SKF Bearing Series .
The development of bearing to improve the shape of the seal material and seal of lip, and optimize the inner wheel sliding seals. Make touch sealing lip to wear as soon as possible, form a non-contact seal, to achieve the minimum clearance. Compared with previous light contact sealed ball bearings, the diameter of the invasion of foreign body control at 35% of the past. And oily reached about 30 times of previous products, ensure the lubrication of bearings, the rotation resistance than usual products was reduced by 80%, with an open bearings to the same degree. In addition, also improved the retainer pocket hole shape, adjust the oil properties. In the invasion of foreign body lubrication condition, the product life is longer than ever before. easy intrusion, the bearings of the question of short life, so the surface of revolution need to use special materials, and require special heat treatment. And seal type bearings because of sealing, which can effectively prevent foreign invasion, has sharply increased the rotational resistance, but better than the open as a result, people have been looking forward to develop both special bearing.