Bearing suffix code is the use of letters and numbers, etc. to indicate bearing structure, tolerance and special requirements of materials.
The new bearing suffix code has: bearing internal structure changes, sealed and external shape changes, cages and its material changes, bearing material changes, tolerance level, clearance level, configuration and so on.

Old bearing code in the suffix code that: bearing parts materials, structure, design, technical conditions change.
Not all bearing has suffix code, only marked when changes.

	Old code	New code	Material	Old code detailed explanation	New code detailed explanation
Material changes	X	/HV /HU	stainless steel	X—9Cr18	/HV—9Cr18
				X1—9Cr18Mo	/HV1—9Cr18Mo
				X2—1Cr18Ni9Ti	/HU—1Cr18Ni9Ti
	N	/HN	Heat resistant steel	N—Cr4Mo4V	/HN—Cr4Mo4V
				N1—Cr14Mo4	/HN1—Cr14Mo4
				N2—Cr15Mo4V	/HN2—Cr15Mo4V
				N3—W18Cr4V	/HN3—W18Cr4V
	S	/HC	Carburizing steel	S—20Cr2Ni4A	/HC—20Cr2Ni4A
				S1—20Cr2Mn2MoA	/HC1—20CrMn2MoA
				S2—15Mn	/HC2—15Mn
	P	/HP	Anti - magnetic materials	Beryllium bronze or other	Beryllium bronze or other
	V	/HQ	Not commonly used material	V—plastic
				V1—Ceramic alloy
	G	/HG	Other bearing steel	G—5CrMnMo	/HG—5CrMnMo
				G1—55SiMnVA	/HG1—55SiMnVA
	W	F	Cage - ferrous metal	W—Graphite steel	F2—Graphite steel
				W1—Carbon steel	F1—Carbon steel
				W2—Ductile iron	F3—Ductile iron
				W3—Powder metallurgy	F4—Powder metallurgy
	Q	Q	Cage - Bronze	Q—Aluminum iron manganese bronze	Q1—Aluminum iron manganese bronze
				Q1—Ferrosilicon Zinc bronze	Q2—Ferrosilicon Zinc bronze
				Q2—Silicon nickel bronze	Q3—Silicon nickel bronze
					Q4—Aluminum bronze
	H	M	Cages - Brass
	L	L	Cages - Aluminum alloy	L—LY11CZ	L—LY11CZ
				L1—LY12CZ	L1—LY12CZ
	J	T	Retainer - phenolic press tube
	A	TN	Cages- Engineering Plastics	A—nylon	TN1—nylon
				A1—Polysulfone	TN2—Polysulfone
				A2—Polyomeric imines	TN3—Polyomeric imines
				A3—Polycarbonate	TN4—Polycarbonate
				A4—Polyoxymethylene	TN5—Polyoxymethylene
Technical requirements changes	F	J	Cages-steel plate
	F	Y	Cages-copper plate
	D	SZ	Cages-spring wire or spring
		S0	Parts tempering temperature has specific requirements		Working temperature up to 150℃
	T	S1		Working temperature up to 200 ℃	Working temperature up to 200℃
	T2	S2		Working temperature up to 250℃	Working temperature up to 250℃
	T3	S3		Working temperature up to 300℃	Working temperature up to 300℃
		S4			Working temperature up to 350℃
	R	/HT	Bearings filled with special grease		Special high temperature grease
		/LT			Special low temperature grease
		/MT			Special medium temperature grease
		/LHT			Special high and low temperature grease
Structural changes	U	C9	The clearance is different from the current standard
	M		Friction torque has special requirements
	E		Shape or size change	Whole series changes
	K			Non-whole series change
Other changes	Y	W20	Many items changes		There are three oil holes on the outer circle
		W26			There are six oil holes in the inner circle
		W33			There are oil grooves and three oil holes on the outer circle
		W33X			There are oil grooves and six oil holes on the outer circle