Metric Size Miniature Flanged Ball Bearings SMF74zz

The SMF74zz is a small, shielded 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 shielded design helps keep out dust and debris while maintaining smooth operation. The stainless steel cage and balls ensure long life, even in demanding conditions.

With a compact width of just 2.5mm and a lightweight 0.4g design, it fits easily into tight spaces. Ideal for small devices like precision instruments or miniature motors.

This bearing operates in temperatures from -30°C to 110°C and meets RoHS and REACH standards. Regular lubrication will keep it running smoothly for years.

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Description

Features

Application

Q&A

Product Parameters

Part Number SMF74zz
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 Shielded
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 0.4 g
Shield Material 300 Series Stainless Steel
Price（$） 1.62

Metric Size Miniature Flanged Ball Bearings SMF74zz dimension drawing

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Features

How Does SMF74zz Bearing Achieve High-Speed Performance?

SMF74zz Bearing is crafted with stainless steel rings and balls, ensuring smooth operation at speeds up to 54,000 rpm.
Its shielded design protects against contaminants while maintaining low friction.
The precision ball alignment reduces vibration, enhancing performance in high-speed applications.
With a dynamic radial load capacity of 44 lbf, it balances speed and durability.

Application

Common Applications of SMF74zz Bearing
SMF74zz Bearing is widely used in small electric motors, such as those found in cooling fans or handheld gadgets, thanks to its compact size and shielded design. The stainless steel construction ensures it handles daily wear without rusting.

In automation systems, SMF74zz Bearing fits neatly into robotic joints or miniature conveyor belts, providing smooth rotation at high speeds. Its ABEC1 tolerance strikes a balance between precision and affordability for light-duty tasks.

For medical devices like dental tools or insulin pumps, SMF74zz Bearing’s low friction and quiet operation are ideal. The shielded seals help keep contaminants out, extending the bearing’s lifespan in sensitive environments.

You’ll also spot SMF74zz Bearing in consumer electronics, such as disk drives or camera lenses, where reliability matters. The metric dimensions make it easy to replace in global product designs.