Detailed explanation of NACHI bearing code

TAG： roller beari ese ball bea | author：赛美瑞 | VISITORS: | source：未知

Jun
2024

Code prefix description:
Material Code:
B -Carburizing Steel
C -Carburizing Steel
D -Carburizing Steel
H- High Speed Steel
S- Stainless steel
NACHI bearing code suffix description:
1. Contact angle code:
C single row angular contact ball bearing nominal contact angle 100-220 (standard 150 )
( A ) Single row angular contact ball bearing nominal contact angle 220-320 (standard 300 )
B single row angular contact ball bearing nominal contact angle 320-450 (standard 400 )
D cylindrical roller bearing nominal contact angle 240-320
C tapered roller bearing nominal contact angle 170-240
2. Special design:
A tapered roller bearing inner ring, bearing width changes
E roller bearing design changes
J tapered roller bearing rings are interchangeable
S26 heat stabilized
S28 heat stabilized
W20 oil hole on the outer ring
W33 oil holes and oil grooves on the outer ring
E2 Spherical roller bearings with machined cage
EX high load capacity spherical roller bearings
A2X high speed spherical roller bearings
AEX high speed and high load capacity spherical roller bearings
V Vibration Machinery Special
3. Cage code :
F machined low carbon steel cage
G Non-metal cage
L machined light alloy cage
MY machined brass cage
V without cage
Y- machined non-ferrous alloy cage
4. Sealing ring or dust cover
ZEZ single-sided dust cover
ZZEZZ double-sided dust cover
NKENK single-sided labyrinth seal
-2NKE-2NK double-sided labyrinth seal
NSENSL single-sided contact seal
-2NSE-2NSL single-sided contact seal
5. Ring change
K taper: 1/12 cone hole
K30 taper: 1/30 cone hole
N has a retaining groove on the outer ring without a retaining ring
NR has a stop ring on the outer ring
6.Double installation
DB back to back installation
DF face-to-face installation
DT series installation
KB back-to-back installation with outer spacer
+a spacer ( a is the nominal width in mm)
UDU and other high-grinding angular contact ball bearings
7. Sleeve
+H adapter sleeve
+AH withdrawal sleeve
8. Clearance
C1 radial clearance C1
C2 radial clearance C2
( CN ) Normal radial clearance
C3 radial clearance C3
C4 radial clearance C4
C5 diameter and clearance C5
C1P diameter and clearance C1P
C2P Radial ClearanceC2P
C6P Radial ClearanceC6P
C9na cylindrical roller bearing ( C9 )
C1na cylindrical roller bearing ( C1 )
C2na cylindrical roller bearings ( C2 )
Cna cylindrical roller bearings (nominal)
C3na cylindrical roller bearings ( C3 )
C4na cylindrical roller bearing ( C4 )
C5na cylindrical roller bearing ( C5 )
CM motor bearing radial clearance (deep groove ball bearings and non-interchangeable cylindrical roller bearings)
CT motor bearing radial clearance (interchangeable cylindrical roller bearings)
9. Tolerance
( 0 ) JIS0 grade ( ISO ordinary grade)
P6JIS6 grade ( ISO6 grade)
P6XJIS6X grade
P5JIS5 grade ( ISO5 grade)
P4JIS4 grade ( ISO4 grade)
P2JIS2 grade ( ISO2 grade)
UPNACHIUP
10. Grease
ADC Shell AndocC
AV2 Shell Alvania No. 2 Grease
BC325 Standard Oil of Japan , 325

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