SKF deep groove ball bearings mainly bear radial loads and can also withstand both radial and axial loads simultaneously. When it only bears radial loads, the contact angle is zero. When deep groove ball bearings have a large radial clearance, they have the performance of angular contact bearings and can withstand large axial loads. The friction coefficient of deep groove ball bearings is very small, and the maximum speed is also high. Deep groove ball bearings have a simple structure and are easy to achieve high manufacturing accuracy compared to other types, making them easy to produce in series and in large quantities. They also have low manufacturing costs and are widely used. In addition to the basic type, deep groove ball bearings also have various variant structures,
The type code for single row deep groove ball bearings is 6, and the code for double row deep groove ball bearings is 4. Its structure is simple, easy to use, and it is the most commonly produced and widely used type of bearing.
tolerance
The standard deep groove ball bearing has a common grade and all comply with GB307.1.
Clearance
The standard deep groove ball bearing has internal clearances of C2, CN, C3, C4, and C5 levels, all of which comply with GB4604.
Holder
Deep groove ball bearings generally use steel plate stamped cages or brass solid cages. When the outer diameter is less than 400 millimeters, steel plate stamped cages are used without a post code. When the outer diameter is greater than 400 millimeters, brass solid cages are often used without a post code.
Deep groove ball suffix meaning
CN: radial clearance of ordinary group; Usually used only in combination with the following letters to represent narrow or offset clearance ranges
H: The narrowed clearance range is equivalent to the upper half of the original clearance range
L: The narrowed clearance range is equivalent to the lower half of the original clearance range
P: The offset clearance range is equivalent to the composition of the upper half of the original clearance range and the lower half of the next set of clearance range
The above letters are applicable to the corresponding meanings of the following clearance groups: C2, C3, C4, and C5, such as C2
C2: Radial clearance smaller than ordinary group
C3: Radial clearance greater than normal group
C4: Radial clearance greater than C3
C5: Radial clearance greater than C4
DB: Two single row deep groove ball bearings paired back-to-back
DF: Two single row deep groove ball bearings paired face-to-face
DT: Two single row deep groove ball bearings paired in series
E: Enhanced design
GJN: Polyurea based grease, NLGI viscosity 2, temperature range -30 to+150 degrees (standard filling amount)
GXN: Polyurea based grease, NLGI viscosity 2, temperature range -40 to+150 degrees (standard filling amount)
J: Stamped steel cage
LHT23: Lithium based grease, NLGI consistency 2, temperature range -50 to+140 degrees (standard filling amount)
LT: Lithium based grease, NLGI viscosity 2, temperature range -55 to+110 degrees (standard filling amount)
LT10: Lithium based grease, NLGI consistency 2, temperature range -50 to+90 degrees (standard filling capacity)
M: Machined brass cage with steel ball guide. Different designs and materials are labeled with numbers after M, such as M2
MA: Machined brass retainer, outer ring guide
MB: Machined brass cage, inner ring guide
MT33: Lithium based grease, NLGI consistency 3, temperature range -30 to+120 degrees (standard filling amount)
MT47: Lithium based grease, NLGI consistency 2, temperature range -30 to+110 degrees (standard filling amount)
N: Outer ring with stop groove
NR: Outer ring with stop groove and stop ring
N1: There are grooves on the side of the outer ring (used to match the stop device to prevent the outer ring from rotating)
P5: Dimensional accuracy and rotational accuracy comply with ISO tolerance level 5
P6: Dimensional accuracy and rotational accuracy comply with ISO tolerance level 6
P52: P5+C2
P62: P6+C2
P63: P6+C3
RS1: Nitrile butadiene rubber (NBR) contact sealing ring with steel frame on one side
RSH: Nitrile butadiene rubber (NBR) contact sealing ring with steel frame on one side
RSL: Low friction sealing ring made of nitrile rubber (NBR) with a steel frame on one side
RZ: Low friction sealing ring made of nitrile rubber (NBR) with a steel frame on one side
TH: Fiber reinforced phenolic resin retainer (card type)
TN: Injection molded nylon cage
TN9: Injection molded fiberglass reinforced nylon 6, 6 retainer
VL0241: The outer surface of the outer ring is coated with aluminum oxide, with an insulation capacity of up to 1000VDC
VL2071: Inner ring with aluminum oxide coating on the outer surface, with insulation capacity up to 1000VDC
WT: Polyurea based grease, NLGI viscosity 2, temperature range -40 to+160 degrees (standard filling amount)
Y: Stamped copper cage
Z: One side with stamped steel dust cover
ZNR: The outer ring is equipped with a stop groove and a stop ring, and the other side of the stop groove is equipped with a stamped steel dust cover
2RS1: Contact sealed storage ring made of nitrile rubber (NBR) with steel frame on both sides
2RSH: Contact sealed storage ring made of nitrile rubber (NBR) with steel frame on both sides
2RSL: Nitrile rubber (NBR) low friction sealing ring with steel frame on both sides
2RZ: Nitrile rubber (NBR) low friction sealing ring with steel frame on both sides
2Z: With stamped steel dust covers on both sides
2ZNR: Outer ring with stop groove and stop ring, with stamped steel dust covers on both sides
Common suffixes with ball loading notches:
C3: Radial clearance greater than normal group
N: Outer ring with stop groove
NR: Outer ring with stop groove connected to stop ring
Z: One side with stamped steel dust cover
ZNR: The outer ring is equipped with a stop groove and a stop ring, and the other side of the stop groove is equipped with a stamped steel dust cover
2Z: With stamped steel dust covers on both sides
2ZNR: Outer ring with stop groove and stop ring, with stamped steel dust covers on both sides
The meaning of stainless steel suffix:
R: Outer ring with flange
VT378: Non toxic lubricating grease (accidental contact with food ingredients)
2RS1: Nitrile rubber (NBR) contact sealing ring with steel frame on both sides
2Z: With stamped steel dust covers on both sides
2ZR: With stamped steel dust covers on both sides and flanges on the outer ring
SKF bearings
