MR74ZZ Ball Bearing 4x7x2.5mm Shielded Chrome

MR74ZZ Miniature Shielded Bearing 4mm x 7mm x 2.5mm, the inner diameter is 4mm, outer diameter is 7mm and the width is 2.5mm, Bearing is made of Chrome Steel, each bearing has 2 Metal Sheilds to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease.
Product Details

MR74ZZ Ball Bearing 4x7x2.5mm Shielded Chrome


MR74ZZ Miniature Shielded Bearing 4mm x 7mm x 2.5mm is a Precision Radial Miniature Ball Bearing with Both Sides Metal Shielded and pre-lubricated with Grease or Oil.

Sizes: ID 4mm x OD 7mm x W 2.5mm
Match #: L-740ZZ, DDL740ZZ, MR74ZZ, MR74-ZZ, R-740ZZ, MR74Z
Used in: DC Motors, 3D Printers, Fidget Spinner, Roller Blades, Skateboard, Inline Skating, Fan, Blower, Power Tools, Bend Saw, Hand Piece, Hobby, RC Helicopters, RC Planes, RC Trucks, RC Cars, Beam Ball Bearing and many more.


MR74ZZ Miniature Shielded Bearing 4mm x 7mm x 2.5mm is a 4mm ball bearing that is found in many applications. MR74ZZ Miniature Shielded Bearing 4mm x 7mm x 2.5mm has two non-contact metal shields one on each side of the ball bearing. If your application requires a MR74ZZ ball bearing with only one shield you can get this ball bearing and take one of the shields off. This 7mm ball bearing MR74ZZ is high quality and can take electric motor demands if needed.

Rolling ball bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads. These elements can be one of the following types: ball, cylindrical, spherical, barrel, needle, spindle, or tapered. All rolling bearings are open, shielded, or sealed. Sealed bearings are lubricated with oil or grease in the bearing factory, while open and shielded bearings are meant to be lubricated in place, with periodic reapplication of lubrication, based on use. The shield protects the working parts of the bearing from environmental debris that may be introduced and could reduce the ball bearing speed and lifespan. Rolling bearings are used in a range of applications from agricultural machinery to conveying equipment, robotics, dental equipment, elevators, rolling mills, ship rudder shafts, and aggregate crushers, among others.


Bearing Type Ball
For Load Direction Radial
Construction Single Row
Seal Type Shielded
Part Number MR74ZZ
For Shaft Diameter 4mm
Bore Dia (d) 4mm
Bore Dia Tolerance -0.008mm to 0
For Housing ID 7mm
Outer Dia (D) 7mm
Outer Dia Tolerance -0.008mm to 0
Width (B) 2.5mm
Width Tolerance -0.12mm to 0
Ring Material 52100 Chrome steel
Ball Material 52100 Chrome steel
Cage Material 300 Series Stainless Steel
Shield Material 300 Series Stainless Steel
Dynamic Load Rating (Cr) (Newtons) 217
Static Load Rating (Cor) (Newtons) 86
Max Speed (Grease) (X1000 RPM) 60
Max Speed (Oil) (X1000 RPM) 80
Lubrication Required
Shaft Mount Type Press Fit
Temperature Range -30° to 110 °C
ABEC Rating ABEC-1
Radial Clearance Trade No. C0
Radial Clearance 0.002mm to 0.013mm
RoHS Compliant
Ball Qty 11
Ball Dia 0.8000mm
Weight (grams) 0.33

1 Applicable only for open, single Z, ZZ, single RU and 2RU types in inner ring rotating conditions. Max. speeds for the contact rubber seal(s) types will be around 50-60 % of above values.
2 Applicable only for open, single Z, ZZ, single RU and 2RU types in inner ring rotating conditions. Max. speeds for the contact rubber seal(s) types will be around 50-60 % of above values.


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