Four-point contact ball bearing QJ 318 N2MA is a bearing separation type, also can saying is a set of bearing can be subject to bi-directional load of angular contact ball bearings. Inside, the outer ring raceway is peach type section, when no load or pure radial load is applied, the steel ball and ring presents a four-point contact, this is also the origin of the name.

Four-point contact ball bearing QJ311 N2MA is a kind of radial single row angular contact ball bearing, the design of raceway are used to support role in both directions of the axial load. 

Four-point contact ball bearing inner ring (or outer) is composed of two and a half circle precisely the blend, and the whole outer or inner ring groove curvature radius is very small, make steel ball and the inner and outer contact in four "dot", so that both increasing the radial load capacity, the size of the compact and at the same time to be able to bear a large axial load in two directions, and have a good the ability of the axial spacing in two directions, this is because its axial clearance is relatively small, and its contact Angle (typically take 35 °) and more.

Related four point contact ball bearings date sheet:

Application:

Four Point Contact Ball Bearings are widely used in home appliances, electric tools, fitness equipment, motors, medical devices, motorbikes, textile machines, autos and other areas.

Packing & Shipping & Warehouse: 

Standard export packing 

Commercial packing: 1pc/plastic bag + color box + carton + plywood pallets

Delivery Detail: 3-5 days for small quantity; 7-10 days for large quantity

FAQ:

Q:Do you accept ODM&OEM order?
A: Yes, we provide ODM&OEM services to worldwide customers, we are able to customize housings in different brands, we also customize circuit board& packing box as per your requirements.

Q: Why did you choose us?
A: We provide the best quality bearings with reasonable price, low friction, low noise and long service lift.

B:With sufficient stock and fact delivery, you can choose our freight forwarder or your freight forwarder.

C:The best service provided by a well-trained international sales team.

Q: How long is your delivery time?
A: Generally speaking, if the goods are in stock, it is 1-3days. If the goods are out of stock, it will take 6-10 days, depending on the quantity of the order.

7,Q:How about the warranty of your product?
A:Usually,we guarantee one year after the delivery date,but it depends on the specified product.