Cylindrical roller bearings have no ribs on either the inner or outer ring, so the rings can move axially relative to each other. These can be used as free-end bearings. Cylindrical roller bearings, in which either the inner or outer rings has two ribs and the other ring has one, are capable of taking some axial load in one direction Double-row cylindrical roller bearings have high radial rigidity and are used primarily for precision machine tools.
♦ Types NU, N, NNU, and NN are suitable as free-end bearings. 
♦ Types NJ and NF can sustain limited axial loads in one direction.
♦ Types NH and NUP can be used as fixed-end bearings.
♦ NH-type cylindrical roller bearings consist of the NJ-type cylindrical roller bearings and HJ-type L-shaped thrust collars.
♦ The inner ring loose rib of an NUPtype cylindrical roller bearing should be mounted so that the marked side is on the outside.
♦ The RNU cylindrical roller bearing has an outer ring with double capped edges but does not come with inner ring. Such bearing is the NU cylindrical roller bearings without the inner ring 
♦ The RN cylindrical roller bearing has an inner ring with double capped edge but does not come with outer ring. 

Packaging & Shipping

1.Neutral packaging: plastic bag + kraft paper + outer carton + plywood pallets; plastic tube + carton + plywood pallets
2. Commercial packing: 1pcs/plastic bag + color box + carton + plywood pallets
3. OEM your brand or According to your requirement
1) Less than 45 KGS, we will send by express.DHL/TNT/FEDEX/UPS/EMS ( Door to Door, Convenient )
2) Between 45 - 200 KGS, we will send by air transport. ( Fastest and safest, but expensive )
3) More than 200 KGS, we will send by sea. ( Cheapest, but long time )
4)Special line: (the Middle East special line /America special line)