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Catalog of WD Compressor Bearings

2025-05-09

Requirements for compressor bearings

As the heart of the cooling system, high reliabity is the key attibute of compressors.

Furthermore, the bearings for compressors are also required to have the attibutes of having a long lifespan, producing low noise, having good oll and heat resistance and being environment - friendly.

Catalog of WD Compressor Bearings 2.jpg

Features of WD compressor bearings

1. Optimized high capacity design that increases the basic loading by 20%

2. L - PPS cage is applied for special conditions. it has high heat resistance, wear resistance and chemical stability that does not reduce the strength in an environment that involves compressor oil, refrigerator oil, nitrogen refrigerant, etc.

3. High quality chrome steel PA12 with higher fatigue resistence is used. The Ti content is no more than 25ppm and oxygen content is less than 9ppm. Other harmful metal contents are all below industrial standards for bearing materials.

4. A sal - bath hardened with 200°C tempered heat treatment is used for bearing components. The press stress status on the components' surface can effectively reduce the crack tendency and guarantee fatigue resistance,wear resistance, hardness, toughness and structural stability of the bearing. Thus, the bearing lifetime can be improved by 70%

5. An optimized roller guided cage design that enlarges the bearings' internal space and improves the inflow and outlow performance of lubrication is used. Thus,the bearings' lubrication conditions can be greatty improved.

Explanation of Bearing Codes

Code	Explanation	Design
NU	Floating bearing,only takes radial loads	Standard design
NJ	Half - positioned bearing.takes both high radial loads and sigle direction axial loads
E	E type strengthen design
B	40°contact angle
TVP2	L - PPS solid wndow - type cage
CN	Normal clearance (omitted)
CNL	Narrowed normal cearance	Customized design
CA	Matched Angular Contact Ball Bearings with small axial clearance
CB	Matched angular contact ball bearings with medium axial clearance
DB	Back - to - back pair matched type
DF	Face - to - face pair matched type
MA	Solid brass cage,outer ring guided

Bearing Tolerance & Catalog

Heavy load Cylindrical Roller Bearings

Applications:

Refrigeration/air conditining screw compressors;

Air/gas screw compressors.

Features:

Optimized high capacity design, increases the basic loading by 20%;

Good lubrication performance for the compact design of compres sors and an extended maintenance cycle.

Bearing precision of P6 or higher.

Internal radial clearance

Inner diameter d(mm)		CN clearance		CNL clearance
From	To	Min	Max	Min	Max
10	24	20	45	20	30
24	30	20	45	25	35
30	40	25	50	25	40
40	50	30	60	30	45
50	65	40	70	35	50
65	80	40	75	40	60
80	100	50	85	45	70

Catalog of WD Compressor Bearings 3.jpg

Bearing code	Dimensions (mm)			Limited speed (rpm)		Basic load (KN)
Bearing code	d	D	B	Reference	Limit	Cr	Cor
NU(NJ)203ETVP1	17	40	12	20000	22000	20	14.3
NU(NJ)204ETVP1	20	47	14	17000	19000	28.5	22
NU(NJ)2204ETVP1	20	47	18	17000	19000	34.5	27.5
NU(NJ)304ETVP1	20	52	15	15000	18000	35.5	26
NU(NJ)2304ETVP1	20	52	21	15000	18000	47.5	38
NU(NJ)205ETVP1	25	52	15	15000	16000	32.5	27
NU(NJ2205ETVP1	25	52	18	15000	16000	39	34
NU(NJ)305ETVP1	25	62	17	12000	15000	46.5	36.5
NU(NJ)2305ETVP1	25	62	24	12000	15000	64	55
NU(NJ)206ETVP1	30	62	16	13000	14000	44	36.5
NU(NJ)2206ETVP1	30	62	20	13000	14000	55	49
NU(NJ)306ETVP1	30	72	19	11000	12000	58.5	48
NU(NJ)2306ETVP1	30	72	27	11000	12000	83	75
NU(NJ)207ETVP1	35	72	17	11000	12000	56	48
NU(NJ)2207ETVP1	35	72	23	11000	12000	69.5	63
NU(NJ)307ETVP1	35	80	21	9500	11000	75	63
NU(NJ)2307ETVP1	35	80	31	9500	11000	106	98
NU(NJ208ETVP1	40	80	18	9500	11000	62	53
NU(NJ)2208ETVP1	40	80	23	9500	11000	81.5	75
NU(NJ)308ETVP1	40	90	23	8000	9500	93	78
NU(NJ)2308ETVP1	40	90	33	8000	9500	129	120
NU(NJ)1009ETVP1	45	75	16	11000	11000	44.6	52
NU(NJ)209ETVP1	45	85	19	9000	9500	69.5	64
NU(NJ)2209ETVP1	45	85	23	9000	9500	85	81.5
NU(NJ)309ETVP1	45	100	25	7500	8500	112	100
NU(NJ)2309ETVP1	45	100	36	7500	8500	160	153
NU(NJ)210ETVP1	50	90	20	8500	9000	73.5	69.5
NU(NJ)2210ETVP1	50	90	23	8500	9000	90	88
NU(NJ)310ETVP1	50	110	27	6700	8000	127	112
NU(NJ)2310ETVP1	50	110	40	6700	8000	186	186
NU(NJ211ETVP1	55	100	21	7500	8000	96.5	95
NU(NJ)2211ETVP1	55	100	25	7500	8000	114	118
NU(NJ)311ETVP1	55	120	29	6000	7000	156	143
NU(NJ)2311ETVP1	55	120	43	6000	7000	232	232
NU(NJ212ETVP1	60	110	22	6700	7500	108	102
NU(NJ)2212ETVP1	60	110	28	6700	7500	146	153
NU(NJ)312ETVP1	60	130	31	5600	6700	173	160
NU(NJ)2312ETVP1	60	130	46	5600	6700	260	265
NU(NJ)213ETVP1	65	120	23	6300	6700	122	118
NU(NJ)2213ETVP1	65	120	31	6300	6700	170	180
NU(NJ)313ETVP1	65	140	33	5300	6000	212	196
NU(NJ)2313ETVP1	65	140	48	5300	6000	285	290
NU(NJ)214ETVP1	70	125	24	6000	6300	137	137
NU(NJ)2214ETVP1	70	125	31	6000	6300	180	193
NU(NJ)314ETVP1	70	150	35	4800	5600	236	228
NU(NJ)2314ETVP1	70	150	51	4800	5600	315	325
NU(NJ)215ETVP1	75	130	25	5600	6000	150	156
NU(NJ)2215ETVP1	75	130	31	5600	6000	186	208
NU(NJ)315ETVP1	75	160	37	4500	5300	280	265
NU(NJ)2315ETVP1	75	160	55	4500	5300	380	400
NU(NJ)1016ETVP1	80	125	22	6000	6300	99	127
NU(NJ)216ETVP1	80	140	26	5300	5600	160	166
NU(NJ)2216ETVP1	80	140	33	5300	5600	212	245
NU(NJ)316ETVP1	80	170	39	4300	5000	300	290
NU(NJ)2316ETVP1	80	170	58	4300	5000	415	440
NU(NJ)217ETVP1	85	150	28	4800	5300	190	200
NU(NJ)2217ETVP1	85	150	36	4800	5300	250	280
NU(NJ)317ETVP1	85	180	41	4000	4800	340	335
NU(NJ)2317ETVP1	85	180	60	4000	4800	455	490
NU(NJ)218ETVP1	90	160	30	4500	5000	208	220
NU(NJ)2218ETVP1	90	160	40	4500	5000	280	315
NU(NJ)318ETVP1	90	190	43	3800	4500	365	360
NU(NJ)2318ETVP1	90	190	64	3800	4500	500	540
NU(NJ)219ETVP1	95	170	32	4300	4800	255	265
NU(NJ)2219ETVP1	95	170	43	4300	4800	325	375
NU(NJ)220ETVP1	100	180	34	4000	4500	285	305
NU(NJ)2220ETVP1	100	180	46	4000	4500	380	450
NU(NJ)320ETVP1	100	215	47	3200	3800	450	440
NU(NJ)2320ETVP1	100	215	73	3200	3800	670	735
NU(NJ)2222ETVP1	110	200	53	3600	4000	440	520
NU(NJ)2224ETVP1	120	215	58	3400	3600	520	630

Heavy - load angular contact ball bearings

Applications:

Refrigeration/air conditioning screw compressors;

Air/gas screw compressors.

Features:

High lad capacity and good lubrcation performance for the compact design of compressors and an extended maintenance cycle;

Bearing precision of P6 or higher

Internal radial clearance

Bearing ID d(mm)		CA clearance		CB clearance
From	To	Min	Max	Min	Max
10	18	5	13	15	23
18	30	7	15	18	26
30	50	9	17	22	30
50	80	11	23	26	38

Catalog of WD Compressor Bearings 4.jpg

Bearing code	Dimensions (mm)			Limited speed (rpm)		Basic load (KN)
Bearing code	d	D	B	Reference	Limit	Cr	Cor
7202BETVP1DB(DF)	15	35	22	24000	26000	14.26	9.3
7302BETVP1DB(DF)	15	42	26	20000	22000	21.06	13.4
7203BETVP1DB(DF)	17	40	24	20000	22000	17.82	11.7
7303BETVP1DB(DF)	17	47	28	19000	20000	25.76	16.6
7204BETVP1DB(DF)	20	47	28	18000	19000	23.17	16.3
7304BETVP1DB(DF)	20	52	30	16000	17000	30.78	20
7205BETVP1DB(DF)	25	52	30	16000	17000	25.27	20
7305BETVP1DB(DF)	25	62	34	14000	15000	42.93	30.6
7206BETVP1DB(DF)	30	62	32	13000	14000	38.88	31.2
7306BETVP1DB(DF)	30	72	38	12000	13000	57.51	42.4
7207BETVP1DB(DF)	35	72	34	11000	12000	50.22	41.6
7307BETVP1DB(DF)	35	80	42	10000	11000	67.23	53
7208BETVP1DB(DF)	40	80	36	10000	11000	59.13	52
7308BETVP1DB(DF)	40	90	46	9500	10000	81	65
7209BETVP1DB(DF)	45	85	38	9500	10000	61.56	57
7309BETVP1DB(DF)	45	100	50	8500	9000	98.8	81
7210BETVP1DB(DF)	50	90	40	9000	9000	64.8	62
7310BETVP1DB(DF)	50	110	54	7500	8000	121.5	102
7211BETVP1DB(DF)	55	100	42	8000	8000	79.4	80
7311BETVP1DB(DF)	55	120	58	7000	8000	137.7	120
7212BETVP1DB(DF)	60	110	44	7000	7500	98.8	100
7312BETVP1DB(DF)	60	130	62	6300	6700	168.5	153
7213BETVP1DB(DF)	65	120	46	6300	6700	112.6	114
7313BETVP1DB(DF)	65	140	66	6000	6300	187.9	173
7214BETVP1DB(DF)	70	125	48	6000	6300	116.6	120
7314BETVP1DB(DF)	70	150	70	5300	5600	205.7	196
7215BETVP1DB(DF)	75	130	50	6000	6300	119	131
7315BETVP1DB(DF)	75	160	74	5000	5300	213.8	208
7216BETVP1DB(DF)	80	140	52	5300	5600	137.7	150
7316BETVP1DB(DF)	80	170	78	4500	5000	231.7	236
7320BETVP1DB(DF)	100	215	47	3800	4000	349.9	416

High speed cylindrical roller bearings

Applications:

Oil free air screw compressors.

Features:

The outer ring guided machined brass cage significantly increases the high speed performance of the bearing.

Bearing precision of P5 or higher

Bearing code	Dimensions(mm)					Basic load (KN)
	d	D	B	r	r1	Cr	Cor
	d	D	B	Min	Min	Cr	Cor
NU205EMA	25	52	15	1	1	32.5	27
NU305EMA	25	62	17	1	1	46.5	36.5
NU206EMA	30	62	16	1	1	44	36.5
NU207EMA	35	72	17	1.1	1.1	56	48
NU307EMA	35	80	21	1.1	1.1	75	63
NU2307EMA	35	80	31	1.1	1.1	106	98
NU208EMA	40	80	18	1.1	1.1	62	53
NU2208EMA	40	80	23	1.1	1.1	81.5	75
NU308EMA	40	90	23	1.1	1.1	93	78
NU209EMA	45	85	19	1.1	1.1	69.5	64
NU210EMA	50	90	20	1.1	1.1	73.5	69.5
NU2210EMA	50	90	23	1.1	1.1	90	88

High speed angular contact ball bearings

Applications:

Oi free air screw compressors.

Features:

The outer ring guided machined brass cage significantly increases the high speed performance of the bearing.

Bearing precision of P5 or higher

Catalog of WD Compressor Bearings 5.jpg

Bearing code	Dimensions(mm)					Basic load (KN)
	d	D	B	r	r1	Cr	Cor
	d	D	B	Min	Min	Cr	Cor
7204BMA	20	47	14	1	0.6	14.35	8.31
7205BMA	25	52	15	1	0.6	15.88	10.45
7306BMA	30	72	19	1.1	0.6	33.4	20.95
7307BMA	35	80	21	1.5	1	41.28	26.51
7208BMA	40	80	18	1.1	0.6	37.24	26.05
7309BMA	45	100	25	1.5	1	64.2	43.43
7310BMA	50	110	27	2	1	73.51	52.29

Tapered roller bearings

Applications:

Oil free air screw compressors.

Features:

The stamped steel cage, can take high radial loads and single direction axial loads.

Bearing precision of P6V2 or higher

Catalog of WD Compressor Bearings 6.jpg

Bearing code	d	D	B	C	T	Dimensions(mm)		Limit speed (rpm)		Basic load (KN)
						r1min	r3min	Reference	Limit	Cr	Cor
						r2min	r4min	Reference	Limit	Cr	Cor
30204	20	47	14	12	15.25	1	1	12000	15000	34.1	28
30205	25	52	15	13	16.25	1	1	11000	13000	38.1	33.5
32205	25	52	18	16	19.25	1	1	11000	13000	50.4	45.5
31305	25	62	17	13	18.25	1.5	1.5	8500	11000	46.6	40
32305	25	62	24	20	25.25	1.5	1.5	9000	12000	74.1	63
30206	30	62	16	14	17.25	1	1	10000	11000	50	44
32206	30	62	20	17	21.25	1	1	9000	11000	61.8	57
33206	30	62	25	19.5	25	1	1	8500	11000	79.7	76.5
32207	35	72	23	19	24.25	1.5	1.5	8000	9500	81.2	78
31307	35	80	21	15	22.75	2	1.5	6300	8500	75.4	67
30208	40	80	18	16	19.75	1.5	1.5	7000	8500	75.8	68
31308	40	90	23	17	25.25	2	1.5	5600	7500	91.1	81.5
32308	40	90	33	27	35.25	2	1.5	6000	8000	143	140
32209	45	85	23	19	24.75	1.5	1.5	6300	8000	98.7	98
30309	45	100	25	22	27.25	2	1.5	5600	7000	130	120
31309	45	100	25	18	27.25	2	1.5	5000	6700	113	102
32309	45	100	36	30	38.25	2	1.5	5300	7000	173	170
30210	50	90	20	17	21.75	1.5	1.5	6000	7500	93	91.5
32210	50	90	23	19	24.75	1.5	1.5	6000	7500	101	100
30310	50	110	27	23	29.25	2.5	2	5300	6300	154	140
31310	50	110	27	19	29.25	2.5	2	4500	6000	131	120
32310	50	110	40	33	42.25	2.5	2	4800	6300	211	212
33211	55	100	35	27	35	2	1.5	4800	6300	170	190
30311	55	120	29	25	31.5	2.5	2	4800	5600	176	163
30212	60	110	22	19	23.75	2	1.5	5000	6000	120	114
33212	60	110	38	29	38	2	2.5	4500	6000	207	236
30312	60	130	31	26	33.5	3	2.5	4300	5300	208	196
31312	60	130	31	22	33.5	3	2.5	3800	5300	177	166
32312	60	130	46	37	48.5	3	2.5	4000	5300	282	290
31313	65	140	33	23	36	3	2.5	3600	4800	203	193
32313	65	140	48	39	51	3	2.5	3600	4800	323	335
32014	70	110	25	19	25	1.5	1.5	4500	5600	125	153
33214	70	125	41	32	41	2	1.5	3800	5000	247	285
31314	70	150	35	25	38	3	2.5	3400	4500	229	220
32314	70	150	51	42	54	3	2.5	3400	4500	363	380
30315	75	160	37	31	40	3	2.5	3400	4300	301	290
31315	75	160	37	26	40	3	2.5	3200	4300	255	245
32315	75	160	55	45	58	3	2.5	3200	4300	416	440
32016	80	125	29	22	29	1.5	1.5	4000	5000	168	216
33016	80	125	36	29.5	36	1.5	1.5	4000	5000	207	285
30316	80	170	39	33	42.5	3	2.5	3200	4000	333	320
31316	80	170	39	27	42.5	3	2.5	3000	4000	276	265
32017	85	130	29	22	29	1.5	1.5	3800	4800	171	224
33017	85	130	36	29.5	36	1.5	1.5	3800	4800	223	310
33217	85	150	49	37	49	2.5	2	3200	4300	353	430
30317	85	180	41	34	44.5	4	3	3000	3800	372	365
31317	85	180	41	28	44.5	4	3	2800	3800	297	285
32018	90	140	32	24	32	2	1.5	3600	4300	208	270
33018	90	140	39	32.5	39	2	1.5	3600	4500	266	355
33118	90	150	45	35	45	2.5	2	3400	4300	310	390
32218	90	160	40	34	42.5	2.5	2	3400	4000	309	340
30318	90	190	43	36	46.5	4	3	2600	3600	353	400
31318	90	190	43	30	46.5	4	3	2400	3400	283	315
32019	95	145	32	24	32	2	1.5	3400	4300	206	270
32219	95	170	43	37	45.5	3	2.5	3200	3800	348	390
30319	95	200	45	38	49.5	4	3	2600	3400	353	390
31319	95	200	45	32	49.5	4	3	2400	3400	314	355
32020	100	150	32	24	32	2	1.5	3200	4000	209	280
30220	100	180	34	29	37	3	2.5	3000	3600	304	320
32220	100	180	46	39	49	3	2.5	3000	3600	390	440
31320	100	215	51	35	56.5	4	3	2200	3000	399	465
30221	105	190	36	30	39	3	2.5	2800	3400	333	355
33022	110	170	47	37	47	2.5	2	3000	3600	343	500
30222	110	200	38	32	41	3	2.5	2400	3200	327	405
32222	110	200	53	46	56	3	2.5	2600	3200	491	570
33024	120	180	48	38	48	2.5	2	2800	3400	356	540
30224	120	215	40	34	43.5	3	2.5	2400	3000	417	465

Catalog of WD Compressor Bearings 7.jpg

Four point angular contact ball bearings

Applications:

Oil flooded refrigeration and high speed dry air compressors.

Features:

Optimized high capacity design;

Good lubrication performance for the compact design of compressors and an extended maintenance cycle.

Bearing precision of P6 or higher.

Bearing code	Dimensions (mm)			Speed ratings (rpm)		Basic load (KN)
Bearing code	d	D	B	Reference	Limiting	Cr	Cor
QJ206MA	30	62	16	14000	19000	37.5	30.5
QJ306MA	30	72	19	12000	17000	53	41.5
QJ207MA	35	72	17	12000	17000	49	41.5
QJ307MA	35	80	21	11000	15000	64	51
QJ208MA	40	80	18	11000	15000	56	49
QJ308MA	40	90	23	10000	14000	78	64
QJ209MA	45	85	19	10000	14000	63	56
QJ309MA	45	100	25	9000	12000	100	83
QJ210MA	50	90	20	9000	13000	65.5	61
QJ310MA	50	110	27	8000	11000	118	100
QJ211MA	55	100	21	8000	11000	85	83
QJ311MA	55	120	29	7000	10000	137	118
QJ212MA	60	110	22	7500	10000	96.5	93
QJ312MA	60	130	31	6700	9000	156	137
QJ213MA	65	120	23	6700	9500	110	112
QJ313MA	65	140	33	6300	8500	176	156
QJ214MA	70	125	24	6300	9000	120	122
QJ314MA	70	150	35	5600	8000	200	180
QJ215MA	75	130	25	6300	8500	125	132
QJ315MA	75	160	37	5300	7500	216	200
QJ216MA	80	140	26	5600	8000	146	156
QJ316MA	80	170	39	5000	7000	232	228
QJ217MA	85	150	28	5300	7500	156	173
QJ317MA	85	180	41	4800	6700	250	255
QJ218MA	90	160	30	5000	7000	186	200
QJ318MA	90	190	43	4500	6300	285	305
QJ219MA	95	170	32	4800	6700	212	232
QJ319MA	95	200	45	4300	6000	305	340
QJ220MA	100	180	34	4500	6300	236	265
QJ320MA	100	215	47	4000	5600	345	400