1. Automotive industry (the largest and most typical application market)
The automotive design maximizes the utilization of space, and needle roller bearings are the key to achieving compact and high-load transmission components.
Transmission:
Gear support: This is used to support the various gears in the transmission. The meshing between gears generates significant radial forces, and the internal space of the transmission is very limited, so ball bearings are the best choice.
Transmission shaft: The supporting bearing of the transmission shaft.
Engine:
Connecting rod head end: The part where the connecting rod connects to the crankshaft, it needs to withstand the tremendous impact force during the explosion stroke and the space is very narrow. Needle roller bearings are widely used in this area.
Piston pin: This component connects the connecting rod and the piston. It uses an outer ring needle roller bearing and directly uses the piston pin and the small end hole of the connecting rod as the raceways, achieving the most compact design.
Steering System:
Gear-rack type steering gear: Used at the supporting point of the steering gear.
Others: Motorcycle clutches, differentials, turbocharger housings, etc.
2. Industrial Machinery and Equipment
Where there is a need for compact structures and the transmission of high power in rotational motion, needle roller bearings are always present.
Machine tools:
The transmission parts such as the main shaft box, feed box, and gearbox.
Agricultural machinery:
The gearboxes and drive shafts of tractors and harvesters, etc., operate in harsh conditions with heavy loads.
Architecture and Construction Equipment:
The transmission systems of excavators, road rollers, etc., as well as the crawler support wheels (which often use a combination of needle roller and thrust ball bearings).
Hydraulic System:
Inside the hydraulic motor and hydraulic pump, the space is very compact and the pressure is high.
3. Household Appliances
Washing Machine: In the deceleration clutch (planetary gear mechanism) of top-loading washing machines, needle roller bearings are widely used to bear the unbalanced load of the drum.
4. Aerospace
Components such as aircraft control surfaces actuators and landing gear systems have extremely strict requirements in terms of weight and space, as well as extremely high reliability standards for certain parts.
5. Other general machinery
In automated equipment such as printing machinery, packaging machinery, and textile machinery, wherever there are restrictions on the radial dimensions and support for rotating components is required.
PRECISION GROUND RADIAL
NEEDLE BEARING
METRIC SERIES
NK, NKS, NKI, NKIS
Precision Needle Bearings
NCS, NK, NKS, RNA48, RNA49, RNA69 SERIES
Without inner rings
Inch and metric
Ground raceways with ribs
Cage guided rollers
For details on part numbers, descriptive suffixes and various technical references, please refer to front of this section.
For engineering or technical information contact your local sales representative or call Distributor Sales (800)523-6572.
