K25X31X21H Needle Roller Bearing (Size: 25x31x21mm)

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K25X31X21H

Bore Diameter:25 mm

Outside Diameter:31 mm

Width:21 mm

Weight:0.026 kg

Min. Order:1 Piece

The K25X31X21H bearing is a Needle Roller Bearings with an inner diameter of 25 mm , an outer diameter of 31 mm, a width of 21 mm. It typically uses Standard grade precision tolerances and Bearing Steel rings. Its dynamic radial rated load is approximately 25.1 (kN), its static radial rated load is approximately 38 (kN). together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Application: Automotive Drivetrains, Industrial Robotics & Automation, Industrial Gearboxes, Medical Equipment

Dimensions:

Inside Diameter:

25 mm

Outside Diameter:

31 mm

Thickness:

21 mm

Weight:

0.026 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

25.1 (kN)

Static load Capacity, Radial (Cor):

38 (kN)

Reference speed (Grease rpm):

12000

Limiting speed (Oil rpm):

18000

Specifications:

HS Code:

8482990000

Structure:

Roller Bearing

Number of Rows:

Single

Demensions:

25x31x21

Brand:

Neutral Product

Precision Rating:

Standard

Bearing Material:

Bearing Steel

Roller Material:

Bearing Steel

Bore Type:

Cylindrical

Operating Temperature Range:

up to 120℃

System of Measurement:

Metric

Rolling Element:

Roller

Transaction Information:

Transport Package:

Standard Export Package

Shipping Ways:

by Sea or Air

Country of Origin:

China

Stock:

10000 Piece

Port:

Tianjin, Shanghai, Shenzhen, Guangzhou or Qingdao

Payment term:

by T/T in advance

Delivery time:

2-3 days for stock, 25-30 days for bulk production

Detailed description

K25X31X21H Needle Roller and Cage Assemblies, High Radial Load Carrying Capacity, High Stiffness, High Precision, Lowest Cross-Sectional Height Among Rolling Bearings, Accommodate Axial Displacement in Both Directions.

Size: 25x31x21mm

Bore Diameter (Fw): 25mm

Outer Diameter (Ew): 31mm

Width (Bc): 21mm

Bearing Material: Bearing Steel (Gcr15)

Working Temperature: Up to 120°C

HS Code: 8482990000

K: Needle Roller and Cage Assembly

TN: Molded Cage of Reinforced Engineered Polymer

H: Hardened Steel Cage

F: Machined Cage

FH: Machined Cage, Case Hardened

FV: Machined Cage, Hardened and Tempered

ZW: Double Row

Radial Needle Roller and Cage Assemblies
Part No.	Fw	Ew	Bc	Load Ratings		Speed Ratings		Weight
				Dynamic (C)	Static (Co)	Grease	Oil
				kN		min-1		Kg
K25X31X21H	25	31	21	25.1	38	12000	18000	0.026

These assemblies are highly specialized and utilized across several major industries:

Automotive Drivetrains: Frequently used in constant mesh gearboxes, internal combustion engine connecting rods, and automotive planetary gears where space is severely limited but durability against high torque is essential.

Industrial Robotics & Automation: Employed in robotic arm pivot points and speed reducers to ensure accurate motion control and support high radial loads.

Industrial Gearboxes: Used to guide and support shafts in power transmission equipment, providing stability and precise rotational accuracy with a minimal footprint.

Medical Equipment: Integrated into applications that demand high precision and reliability, including dental handpieces and surgical instruments.

Needle roller and cage assemblies are self-contained, ready-to-mount bearings without inner and outer rings. In applications where the shaft and housing bore can serve as raceways, the assemblies can be used to create bearing arrangements that require minimal radial space. As the clearance of the bearing arrangement is only affected by the roller sorting and the finish of shaft and housing, very precise bearing arrangements can be achieved.

All the bearings we are offering are direct factory price, fast delivery, perfect quality. For more bearings, please feel free to mail us at [email protected] or contact us by Wechat or Whatsapp at +8618062246726.

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K25X31X21H Needle Roller Bearing (Size: 25x31x21mm)

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