Z&R Code Interpretation Temporary Copy According to the different use occasions of agricultural machinery, Zhongda Bearing has corresponding products to meet your needs. Zhongda Bearing is a leading brand of bearing products in the national agricultural machinery industry and a leading innovator of agricultural machinery bearings. Bearing and equipment manufacturers go out into the fields together to discuss the challenges and concerns they face. By working closely with equipment manufacturers to develop solutions to practical problems, we help farmers across the country increase productivity. We are committed to improving product quality as a commitment to our customers to help you meet the growing needs of modern agriculture.
Zhongda bearing product advantages
1: Well-designed and high-precision sealing concept can operate reliably in various weather conditions.
2: Low maintenance or maintenance-free design ensures high utilization of the machine
3: Able to withstand continuous vibration and high impact loads
4: High-cleanliness, fully hardened bearing steel is heat treated and precision machined to improve accuracy and extend service life 5: Premium polyurea thickened grease provides corrosion protection and extends grease life

 

Serial Number	Material Code	Code Name Explanation	Example	Other Code Names
1	UC	The outer ring is spherical and the inner ring is locked with a jackscrew.	UC208/G/V3/C12/G2--F---No. 3-	Y,YAR
2	UC	The outer ring is spherical and the inner ring is locked with a jackscrew.	UC208/G/V3/C12/G2--F---No. 3-	Y,YAR
3	NA	The outer ring is spherical and the inner ring is locked with an eccentric sleeve.	NA208/V3/ERZ--F---No. 3-	UEL,UG,G,YEL,HC
4	UK	The outer ring is spherical and the inner ring is tapered.	UK205/G/V3--F---No. 3-
5	UCX	The outer ring is spherical, the inner ring is locked with a jackscrew, and the inner ring is thickened.	UCX08/V3/C12/G2--F---No. 3-
6	UD	The outer ring is spherical, without locking device, and the inner and outer rings are at the same height.	UD208/G/V3--NPP---No. 3-	ORAE,CS ,1580
7	SB	The outer ring is spherical, one end is flat, and the inner ring is locked with a jackscrew.	SB207/G/V3/C12/G2--NPP---No. 3-
8	SA	The outer ring is spherical, one end is flat, and the inner ring is locked with an eccentric sleeve.	SA207/G/V3/ER--NPP---No. 3-
9	SER	The outer ring is flat, with a stop spring, and the inner ring is locked with a jackscrew.	SER207/G/V2/C12/G2--F-P0-ZV1-3
10	RA	The outer ring is flat, one end is flat, and the inner ring is locked with an eccentric sleeve.	RA207/ER-19mm-NPP---No. 3-
11	RB	The outer ring is flat, one end is flat, and the inner ring is locked with a jackscrew.	RB207/C12/G2--NPP---No. 3-
12	UC---T	The outer ring is spherical and the inner ring is locked with a concentric sleeve.	UC208-24T/G/V3/ER--F-P0-ZV1-3-
13	RZ	Flat outer ring, cylindrical hole in the inner ring, no locking device in the inner ring, center groove
14	RP	Flat outer ring, cylindrical hole in the inner ring, no locking device in the inner ring
15	RW	Flat outer ring, hexagonal hole in the inner ring, no locking device in the inner ring
16	UW	Spherical outer ring, hexagonal hole in the inner ring, no locking device in the inner ring
17	RF	Flat outer ring, square hole in the inner ring, no locking device in the inner ring
18	UF	The outer ring is spherical, the inner ring is square hole, and the inner ring has no locking device.
19	GSH	The outer ring is spherical, the inner ring is tapered, equipped with an adapter sleeve, and the center groove is
20	1680	The outer ring is spherical, the inner ring is tapered, equipped with an adapter sleeve and an offset groove.
	V2	The two oil holes are 180° on both sides of each other.		both sides
	V3	There are three oil holes in total, two oil holes on one side are juxtaposed at 120°, and one oil hole on the other side is centered at an angle of 60° to the opposite oil hole.	UC205/V3/C12/G2-F-3
	V4	The four oil holes are distributed at 90° on both sides and 180° on one side. ,each other is 90°	UC205/V4/C12/G2-F-3
	L1	1 oil hole on one side		one side
	L2	2 oil holes on one side, distributed at 180°
	L3	Three oil holes on one side are distributed at 120°	UC205/L3/C12/G2-F-3
	L4	The four oil holes on one side are 90° distributed with each other.
	Other special	7.5°V4  ,120°L2  , 90°V3
	G	The outer ring has an oil groove (if there is no oil groove, it will not be marked)	UC205/G/V3/C12/G2-F-3
	G*2	There are oil grooves on both sides of the outer ring	UC205/G*2/V3/C12/G2-F-3
	M-F	Outer ring seal groove with knurling
	N	The outer ring has a circlip groove
	NR	With circlip groove and circlip
	C6	Inner ring stop screw thread hole 60°
	C9	Inner ring stop screw thread hole 90°
	C12	Inner ring stop screw thread hole 120°
	UG	The deep groove ball inner ring has a sealing groove (if not, there will be no mark)
	K	Inner ring with taper
	GYE	The chamfering of the inner ring is at a right angle, and the front and rear ends of the outer diameter of the inner ring are not ground (INA process)
	Br	Bainitic heat treatment (salt quenching)
	Mr	Martensitic heat treatment (oil quenching)
	M-F	Maintenance-free sealing (vertical edge phosphate treatment)
	NPP	NPP galvanized opening
	NPP1	NPP galvanized hemming
	NPP2	NPP galvanized table sheets
	NPP3	NPP galvanized vertical edge
	NPPB	NPP phosphate opening
	NPPB1	NPP phosphate curling
	NPPB2	NPP phosphate plate
	NPPB3	NPP phosphated vertical edge
	R3	Galvanized hemming
	R3.1	Galvanized standing edge
	RB3	Phosphated vertical edge
	X-	New Technology
	D	Steel retaining ring seal (four stars)
	D1	Steel retaining ring seal (table plate)
	D2	Steel retaining ring seal (flat sheet)
	DZ	Steel retaining ring seal (galvanized)
	F	F type seal
	SAF	Specially used for F-type seals with parallel inner and outer rings (such as SA.SB.UD)
	C/CC	Sealed outer shell with steel cover
	H.2	High temperature resistant seal
	Z/ZZ	One side with iron seal/double side with iron seal
	RS/2RS	Single-sided rubber seal/double-sided rubber seal
	G2	Filigree stop screw on top
	G5	Top with steel ball
	G6	Round pin on top
	G4	The top is pointed
	G7	The surface of the stop screw is coated with nylon layer to prevent loosening
	Z	Surface galvanized products
	ER	Eccentric sleeve blackening treatment
	ERZ	Eccentric sleeve galvanized treatment
	EREP	Eccentric sleeve electrophoresis treatment
	ERT	Concentric sets
	S	Stainless steel material
	TP	Plastic seat
	TN	Nylon retainer
	M	Brass retainer