Deep groove ball bearings are the most common type of rolling bearing. A basic deep groove ball bearing consists of an outer ring, an inner ring, a set of balls, and a cage. Its simple structure and ease of use make it the most widely produced and applied type of bearing.

Structure and Characteristics: Deep groove ball bearings are non-separable bearings, with a simple structure and extremely common use. Besides the basic type, there are various variations, such as: deep groove ball bearings with dust covers, deep groove ball bearings with rubber seals, deep groove ball bearings with retaining grooves, and full complement deep groove ball bearings with large load capacity and filling notches.

Deep groove ball bearings primarily bear radial loads, but can also bear both radial and axial loads simultaneously. They are suitable for use under high-speed operating conditions. When bearing only radial loads, the contact angle is zero. When a deep groove ball bearing has a large radial clearance, it exhibits the performance of an angular contact bearing and can withstand large axial loads. Deep groove ball bearings have a very low coefficient of friction and a high limiting speed, but are not suitable for heavy loads. A larger radial clearance increases axial load capacity, and the contact angle is zero when subjected to pure radial force. When axial force is applied, the contact angle is greater than zero.

Explanation of Suffix Codes

(1) Internal Structure Codes

Code Meaning

B, E

1) Indicates a change in internal structure

2) Indicates a standard design; its meaning varies depending on the type and structure

3) Reinforced type

Note: 1) Reinforced type means an improved internal structure design, increasing the bearing's load capacity.

(2) Codes for Sealing, Dustproofing, and External Shape Changes

Code Meaning

K Inner diameter of tapered bore Taper 1:12 (except for spherical roller bearings)

R: Bearing outer ring has a retaining flange (flange outer ring)

N: Bearing outer ring has a retaining groove

NR: Bearing outer ring has a retaining groove and a retaining ring

-RS: Bearing with a skeletonized rubber seal on one side (contact type)

-2RS: Bearing with skeletonized rubber seals on both sides (contact type)

-RZ: Bearing with a skeletonized rubber seal on one side (non-contact type)

-2RZ: Bearing with skeletonized rubber seals on both sides (non-contact type)

-Z: Bearing with a dust cover on one side

-2Z: Bearing with dust covers on both sides

-RSZ: Bearing with a skeletonized rubber seal (contact type) on one side and a dust cover on the other side

-RZZ

-ZN: Bearing with a skeletonized rubber seal (non-contact type) on one side and a dust cover on the other side

Bearing with a dust cover on one side and a retaining groove on the outer ring on the other side

-Z NR

Bearing with a dust cover on one side, and a retaining groove and retaining ring on the outer ring on the other side

-ZNB

Bearing with a dust cover on one side, and a retaining groove on the outer ring on the same side

-2ZN

Bearing with dust covers on both sides, and a retaining groove on the outer ring

N1

Bearing with one locating groove on the outer ring

N2

Bearing with two or more locating grooves on the outer ring

N4

N+N2, the locating groove and the retaining groove are not on the same side

N6

N+N2, the locating groove and the retaining groove are on the same side

-FS

Bearing with a felt ring seal on one side

-2FS

Bearing with felt ring seals on both sides

-LS

Bearing with a skeleton rubber seal on one side (contact type, ring not grooved)

-2LS

Bearing with a skeleton rubber seal on both sides (contact type, ring not grooved)

WB

Wide inner ring bearing (double-sided width): WB1 single-sided width

(3) Bearing parts materials

Substitute Symbol Meaning /HV Rings, rolling elements, and cages, or only rings and rolling elements, are made of hardenable stainless steel (/HV-9Cr18; /HV1-9Cr18Mo)

/HC Rings and rolling elements, or only rings, are made of carburized steel (/HC-20Cr2Ni4A; /HC1-20Cr2Mn2MoA; /HC2-15Mn)

/HG Rings and rolling elements, or only rings, are made of other bearing steels (/HG-5CrMnMo; /HG1-55SiMoVA)

F Steel, ductile iron, or powder metallurgy solid cages (F1-carbon steel; F2-graphite steel; F...) 3-Ductile cast iron; F4-Powder metallurgy)

Q Solid bronze cage (Q1-Aluminum iron manganese bronze; Q2-Silicon iron zinc bronze; Q3-Silicon nickel bronze;

Q4-Aluminum bronze)

M Solid brass cage

TN Molded engineering plastic cage (TN1-Nylon; TN2-Polysulfone; TN3-Polyimide; TN4-Polycarbonate; TN5-Polyoxymethylene)

J Stamped steel cage

V Full complement rolling elements (without cage)

(4) Tolerance grade and clearance code Symbol

Meaning

/P0 Tolerance grade conforms to standard grade 0, omitted in the designation

/P6 Tolerance grade conforms to standard grade 6

/P5 Tolerance grade conforms to standard grade 5

/P4 Tolerance grade conforms to standard grade 4

/P2 Tolerance grade conforms to standard grade 2

/C0 Clearance conforms to standard group 0, omitted in the designation

/C1 Clearance conforms to standard group 1

/C2 Clearance conforms to standard group 2

/C3 Clearance conforms to standard group 3

/C4 Clearance conforms to standard group 4

/C5 Clearance conforms to standard group 5

/CM Clearance of deep groove ball bearings for motors

/C9 Bearing clearance differs from current standard

Note: When the tolerance grade and clearance code need to be expressed simultaneously, they can be simplified to P63, P43, etc., where /P6 indicates bearing tolerance grade P6 and radial clearance group 3; /P43 indicates bearing tolerance grade P4 and radial clearance group 3.

(5) Size Series Code Meaning X1 Non-standard bearing outer diameter

X2 Non-standard bearing width (height)

X3 Non-standard bearing outer diameter and width (height) (standard inner diameter)

(6) Other Characteristic Codes Code Meaning /Z Bearing vibration acceleration level extreme value group. Additional numbers indicate different extreme values, divided into Z1 group; Z2 group; Z3 group

/V Bearing vibration velocity level extreme value group. Additional numbers indicate different extreme values, divided into groups V1, V2, and V3.

/S0 Bearing rings undergo high-temperature tempering treatment, with an operating temperature up to 150°C.

/S1 Bearing rings undergo high-temperature tempering treatment, with an operating temperature up to 200°C.

/S2 Bearing rings undergo high-temperature tempering treatment, with an operating temperature up to 250°C.

/S3 Bearing rings undergo high-temperature tempering treatment, with an operating temperature up to 300°C.

/S4 Bearing rings undergo high-temperature tempering treatment, with an operating temperature up to 350°C.

/HT Bearings are filled with special high-temperature grease. When the amount of grease filled in the bearing differs from the standard value, additional letters are added to indicate:

A—Grease filling amount is less than the standard value;

B—Grease filling amount is more than the standard value;

C—Grease filling amount is more than B (fully filled)

/LT Bearing filled with special low-temperature grease

/MT Bearing filled with special medium-temperature grease

/LHT Bearing filled with special high and low temperature grease

/Y Y combined with another letter (such as YA, YB) is used to identify non-serialized changes that cannot be expressed by existing suffixes:

/YA Structural change (comprehensive expression);

/YB Technical condition change (comprehensive expression)

Note: For bearing codes containing /Y and another letter or a suffix with numbers, consult the drawings or supplementary technical conditions, or consult our product design department to understand the specific details of the change.

Applications: Deep groove ball bearings can be used in precision instruments, gearboxes, meters, motors, household appliances, internal combustion engines, vehicles, agricultural machinery, construction machinery, engineering machinery, yo-yos, etc.