Metric Size Miniature Flanged Ball Bearings SMF74 2rs

The SMF74 2RS is a small, sealed ball bearing with a 4mm bore and 7mm outer diameter, crafted entirely from stainless steel for durability. It handles radial loads up to 44 lbf and spins at speeds up to 54,000 RPM, making it suitable for high-speed applications.

Its compact design, just 2.5mm wide, includes a nitrile rubber seal to keep dirt out and lubrication in. The stainless steel cage ensures smooth operation and long service life.

This bearing is ideal for small devices like precision instruments or miniature motors where space is limited. It performs well in temperatures from -30°C to 110°C.

Weighing only 0.3g, it’s lightweight yet robust. Compliant with RoHS and REACH standards, it’s a reliable choice for various industrial and hobbyist uses.

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Description

Features

Application

Q&A

Product Parameters

Part Number SMF74 2rs
Brand TFL
System of Measurement Metric
Bearing Type Ball
Bore Dia 4 mm
Bore Dia Tolerance -0.008mm to 0
Outer Dia 7 mm
Outer Dia Tolerance -0.008mm to 0
Width 2.5 mm
Width Tolerance -0.12mm to 0
Flange Outer Dia 8.2 mm
Flange Thickness 0.6 mm
Radial Clearance 0.002mm to 0.013mm
Ball Qty 8
Ball Dia 1.0000 mm
For Load Direction Radial
Construction Single Row
Inner Ring Type Standard
Seal Type Sealed
Tolerance Class ABEC1
Radial Clearance Trade No MC3
Ring Material Stainless Steel
Ball Material Stainless Steel
Cage Material Stainless Steel
Dynamic Radial Load 44 lbf
Static Radial Load 17 lbf
Max Speed 54000 rpm
Temperature Range -30° to 110 °C
Lubrication Required
RoHS Compliant
REACH Compliant
Weight 0.3 g
Shield Material Nitrile Rubber
Price（$） 1.62

Metric Size Miniature Flanged Ball Bearings SMF74 2rs dimension drawing

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Features

How Does SMF74 2rs Bearing Achieve High-Speed Performance?

SMF74 2rs Bearing is crafted with stainless steel rings and balls, ensuring smooth operation at speeds up to 54,000 rpm.
Its sealed design with nitrile rubber shields protects against contaminants, maintaining performance in various environments.
The ABEC1 tolerance class and precise radial clearance of 0.002mm to 0.013mm contribute to its reliable radial load handling.
With a dynamic radial load capacity of 44 lbf, it is suitable for compact, high-speed applications.

Application

Where Is SMF74 2rs Bearing Used?
SMF74 2rs Bearing is commonly found in small electric motors, such as those used in drones or RC cars, where its compact size and sealed design prevent dust ingress. The stainless steel construction ensures longevity even in humid conditions.

In consumer electronics like mini fans or handheld devices, SMF74 2rs Bearing provides smooth rotation thanks to its low friction design. Its high-speed capability makes it ideal for applications requiring quick, reliable movement.

For medical instruments, SMF74 2rs Bearing’s precision and cleanliness are key, especially in devices like blood analyzers. The sealed feature helps maintain hygiene by keeping contaminants out during operation.

Automation systems benefit from SMF74 2rs Bearing in compact robotic arms or small conveyor mechanisms. Its lightweight and durability make it a go-to for repetitive, high-speed tasks.