CN: radial clearance of ordinary group; Usually used only in combination with the following letters to indicate a narrow or offset clearance range
H: The narrowed clearance range is equivalent to the upper part of the original clearance range
L: The reduced clearance range is equivalent to the lower half of the original clearance range
P: The offset clearance range is equal to the composition of the upper part of the original clearance range and the lower part of the next set of clearance ranges
The above letters are also used in conjunction with the following clearance groups: C2, C3, C4, and C5, e.g. C2
C2: Radial clearance is less than normal group
C3: Radial clearance is larger than normal group
C4: Radial clearance is greater than C3
C5: Radial clearance is 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: Intensifying design
GJN: Poly urea base grease, NLGI consistency 2, temperature range -30 to +150 ° C (standard filling volume)
GXN: Poly urea base grease, NLGI consistency 2, temperature range -40 to +150 ° C (standard filling volume)
J: Stamped steel cage
LHT23: Lithium base grease, NLGI consistency 2, temperature range -50 to +140 ° C (standard filling volume)
LT: Lithium base grease, NLGI consistency 2, Temperature range -55 to +110 degrees (standard fill)
LT10: Lithium Base 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 a number after the M, such as M2
MA: Machined brass cage with outer ring guide
MB: Machined brass cage, inner ring guide
MT33: Lithium Base Grease, NLGI Constency 3, Temperature Range -30 to +120 ° C (Standard Fill Size)
MT47: Lithium Base Grease, NLGI Constency 2, Temperature Range -30 to +110 ° C (Standard Fill)
N: The outer ring has a stop slot
NR: Outer ring with stop slot and stop ring
N1: Groove on the side of the outer ring (for matching with the stop device to prevent the outer ring from rotating)
P5: Dimensional accuracy and rotary accuracy conform to ISO tolerance class 5
P6: Dimensional accuracy and rotary accuracy conform to ISO tolerance class 6
P52: P5 + C2
P62: P6 + C2
About: P6 + C3
RS1: NBR contact sealing ring with steel frame on one side
RSH: NBR contact sealing ring with steel frame on one side
RSL: Nitrile diene rubber (NBR) low friction sealing ring with steel frame on one side
RZ: Nitrile diene rubber (NBR) low friction seal with steel frame on one side
TH: Fiber-reinforced phenolic resin cage (card type)
TN: Injection molded nylon cage
TN9: Injection molded glass fiber reinforced nylon 6,6 cage
VL0241: Alumina coated outer surface of outer ring, insulating capacity up to 1000VDC
VL2071: Alumina coating on the outer surface of inner ring, insulating capacity up to 1000VDC
WT: Poly urea base grease, NLGI consistency 2, temperature range -40 to +160 ° C (standard fill volume)
Y: Stamped copper cage
Z: One side with pressed steel dust cover
ZNR: The outer ring is provided with a stop groove and a stop ring. The other side of the stop groove is provided with a stamping steel dustproof cover
2RS1: NBR contact sealing ring with steel frame on both sides
2RSH: NBR contact sealing ring with steel frame on both sides
2RSL: Nitrile butadiene rubber (NBR) low friction sealing ring with steel frame on both sides
2RZ: Nitrile butadiene rubber (NBR) low friction sealing ring with steel frame on both sides
2Z: Two sides with stamping steel dustproof cover
2ZnR: The outer ring is equipped with a stop groove and a stop ring, and the two sides are equipped with a stamped steel dust cover
Common suffixes with a ball gap:
C3: Radial clearance is larger than normal group
N: The outer ring has a stop slot
NR: outer ring with stop slot and stop ring
Z: One side with pressed steel dust cover
ZNR: The outer ring is provided with a stop groove and a stop ring. The other side of the stop groove is provided with a stamping steel dustproof cover
2Z: Two sides with stamping steel dustproof cover
2ZnR: The outer ring is equipped with a stop groove and a stop ring, and the two sides are equipped with a stamped steel dust cover
Stainless steel suffix meaning:
R: Outer ring with flanges
VT378: Non-toxic grease (accidental contact with food ingredients)
2RS1: Nitrile butadiene rubber (NBR) contact ring with steel frame on both sides
2Z: Two sides with stamping steel dustproof cover
2ZR: Two sides with stamping steel dust cover and outer ring with flange