Double Row Super-Precision Cylindrical Roller Bearings NN 3021 KTN9/SPW33

The NN 3021 KTN9/SPW33 is a double-row cylindrical roller bearing with a 105mm bore and 160mm outer diameter, crafted from high-quality chrome steel. It handles combined loads up to 42750 lbf and operates smoothly at speeds up to 6000 RPM.

Its open design allows for easy lubrication with grease or oil, while the PA66 cage ensures durability and precise roller alignment. The bearing performs reliably in temperatures ranging from -30°C to 110°C.

With a tapered bore for secure fitting, this model is interchangeable with SKF bearings, making it a practical choice for replacements. Ideal for heavy-duty applications like machine tools or industrial gearboxes where precision and load capacity are key.

Weighing 2.68kg, it’s built to last while meeting RoHS and REACH standards for safety and environmental compliance. The annular lubrication groove and holes simplify maintenance.

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Description

Features

Application

Q&A

Product Parameters

Part Number NN 3021 KTN9/SPW33
Size 105 mm x 160 mm x 41 mm
Brand TFL
Interchangeable brand SKF
System of Measurement Metric
Roller Bearing Type Cylindrical
Bore Type Taper 1:12
For Load Direction Combined
Construction Double Row
Seal Type Open
Bore Dia 105 mm
Bore Dia Tolerance 0 to +0.020mm
Outer Dia 160 mm
Outer Dia Tolerance -0.013mm to 0
Width 41 mm
Width Tolerance -0.20mm to 0
Chamfer Dimension Outer Ring(r1,2)(min.) 2 mm
Chamfer Dimension Inner Ring(r3,4)(min.) 1.1 mm
Permissible Axial Displacement(max.) 2 mm
Ring Material Chrome Steel
Roller Material Chrome Steel
Dynamic Radial Load 42750 lbf
Static Radial Load 68625 lbf
Max Speed 6000 rpm
Lubrication Grease, Oil
Temperature Range -30° to 110 °C
RoHS Compliant
REACH Compliant
Weight 2.68 kg
Cage Material PA66 cage, roller centred
Width Annular Lubrication Groove Outer Ring(B1) 5.5 mm
Diameter Lubrication Hole (outer Ring) (K) 3 mm

Double Row Super-Precision Cylindrical Roller Bearings NN 3021 KTN9/SPW33 dimension drawing

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Features

Performance Features of NN 3021 KTN9/SPW33 Bearing

NN 3021 KTN9/SPW33 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 42,750 lbf, ensuring reliable performance in demanding applications.

The double-row design of NN 3021 KTN9/SPW33 Bearing enhances stability and load distribution.
With a maximum speed of 6,000 rpm, it balances durability and efficiency.

NN 3021 KTN9/SPW33 Bearing’s PA66 cage keeps the rollers centred, reducing wear and extending service life.
The open design allows for easy lubrication with grease or oil, maintaining smooth operation.

NN 3021 KTN9/SPW33 Bearing operates effectively in temperatures ranging from -30° to 110°C.
Its tapered bore design ensures secure fitting and alignment, reducing installation errors.

Application

Industrial Uses of NN 3021 KTN9/SPW33 Bearing
NN 3021 KTN9/SPW33 Bearing is commonly used in machine tools, where its double-row design handles both radial and axial loads efficiently. The tapered bore ensures a secure fit, reducing slippage during high-speed operations.

What Makes NN 3021 KTN9/SPW33 Bearing a Preferred Choice?
In automation systems, NN 3021 KTN9/SPW33 Bearing supports robotic arms with its high precision and smooth rotation. The open seal design allows for easy lubrication, extending its service life in demanding environments.

Built for Heavy-Duty Use: NN 3021 KTN9/SPW33 Bearing
For wind turbines, NN 3021 KTN9/SPW33 Bearing’s chrome steel construction withstands harsh weather conditions while maintaining performance. Its grease or oil lubrication options provide flexibility for different operational needs.

Automotive vs Aerospace: Applications of NN 3021 KTN9/SPW33 Bearing
In automotive gearboxes, NN 3021 KTN9/SPW33 Bearing ensures reliable power transmission under combined loads. For aerospace applications, its high-speed capability and precision make it suitable for critical flight components.

Perfect Fit for Automation: NN 3021 KTN9/SPW33 Bearing
NN 3021 KTN9/SPW33 Bearing is ideal for 3D printers, where its low friction and high accuracy contribute to consistent print quality. The PA66 cage material reduces weight without compromising durability.