72C/ACP4 Standard Series

Features of 72C/ACP4 Standard Series

With ISO as the standard; the ring material adopts high-purity (electroslag remelting) bearing steel, with special heat treatment process, cold treatment process and material modification technology, which greatly improves the fatigue life of this series of bearings.

Applications

It is mainly used for working conditions requiring precise axial positioning and radial positioning, high-precision rotation for medium and high speeds.

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Parameter Introduction Quality Standard

Parameter

Bearing code

LYLKWE Spindle Bearings
Bearing code	Dimensions					Abutment dimensions				Load rating			Attainable speed**		Sealed design*	Weight
	d	D	B	rsmin	r1smin	da	Da	ra	rb	Etk	Cdyn	C0stat	Grease	Oil
						h12	H12	max	max	nom.				minimal		kg
	mm										kN		min-1
B7200-CT-P4S	10	30	9	0.30	0.60	14.5	25.5	0.6	0.6	18.8	5.85	2.90	56000	85000	√	0.03
B7200-E-T-P4S	10	30	9	0.30	0.60	14.5	25.5	0.6	0.6	18.8	5.60	2.80	50000	75000	√	0.03
HCB7200-C-T-P4S	10	30	9	0.30	0.60	14.5	25.5	0.6	0.6	18.8	4.00	2.04	70000	110000	√	0.03
HCB7200-E-T-P4S	10	30	9	0.30	0.60	14.5	25.5	0.6	0.6	18.8	3.90	1.96	60000	90000	√	0.03
B7201-CT-P4S	12	32	10	0.60	0.60	16.5	27.5	0.6	0.6	21.1	7.65	3.90	50000	75000	√	0.04
B7201-E-T-P4S	12	32	10	0.60	0.60	16.5	27.5	0.6	0.6	21.1	7.35	3.75	45000	67000	√	0.04
HCB7201-C-T-P4S	12	32	10	0.60	0.60	16.5	27.5	0.6	0.6	21.1	5.30	2.70	63000	95000	√	0.03
HCB7201-E-T-P4S	12	32	10	0.60	0.60	16.5	27.5	0.6	0.6	21.1	5.10	2.60	56000	85000	√	0.03
B7202-CT-P4S	15	35	11	0.60	0.60	19.5	30.5	0.6	0.6	23.3	9.65	5.00	45000	67000	√	0.04
B7202-E-T-P4S	15	35	11	0.60	0.60	19.5	30.5	0.6	0.6	23.3	9.30	4.80	40000	60000	√	0.04
HCB7202-C-T-P4S	15	35	11	0.60	0.60	19.5	30.5	0.6	0.6	23.3	6.70	3.45	56000	85000	√	0.04
HCB7202-E-T-P4S	15	35	11	0.60	0.60	19.5	30.5	0.6	0.6	23.3	6.40	3.35	48000	70000	√	0.04
B7203-CT-P4S	17	40	12	0.60	0.60	34.5	30.5	0.6	0.6	26.7	10.80	5.85	38000	56000	√	0.06
B7203-E-T-P4S	17	40	12	0.60	0.60	34.5	30.5	0.6	0.6	26.7	10.40	5.60	36000	53000	√	0.06
HCB7203-C-T-P4S	17	40	12	0.60	0.60	34.5	30.5	0.6	0.6	26.7	7.50	4.05	50000	75000	√	0.06
HCB7203-E-T-P4S	17	40	12	0.60	0.60	34.5	30.5	0.6	0.6	26.7	7.20	3.90	43000	63000	√	0.06
B7204-CT-P4S	20	47	14	1.00	1.00	26.5	40.5	1.0	1.0	31.7	14.60	8.15	32000	48000	√	0.10
B7204-E-T-P4S	20	47	14	1.00	1.00	26.5	40.5	1.0	1.0	31.7	14.00	7.80	30000	45000	√	0.10
HCB7204-C-T-P4S	20	47	14	1.00	1.00	26.5	40.5	1.0	1.0	31.7	10.00	5.60	43000	63000	√	0.09
HCB7204-E-T-P4S	20	47	14	1.00	1.00	26.5	40.5	1.0	1.0	31.7	9.65	5.40	36000	53000	√	0.09
B7205-CT-P4S	25	52	15	1.00	1.00	31.5	45.5	1.0	1.0	36.5	15.60	9.30	28000	43000	√	0.12
B7205-E-T-P4S	25	52	15	1.00	1.00	31.5	45.5	1.0	1.0	36.5	15.00	9.00	26000	40000	√	0.12
HCB7205-C-T-P4S	25	52	15	1.00	1.00	31.5	45.5	1.0	1.0	36.5	10.80	6.55	36000	53000	√	0.11
HCB7205-E-T-P4S	25	52	15	1.00	1.00	31.5	45.5	1.0	1.0	36.5	10.40	6.20	32000	48000	√	0.11
B7206-CT-P4S	30	62	16	1.00	1.00	37.5	54.5	1.0	1.0	43.7	23.20	14.60	24000	38000	√	0.19
B7206-E-T-P4S	30	62	16	1.00	1.00	37.5	54.5	1.0	1.0	43.7	22.00	14.00	22000	36000	√	0.19
HCB7206-C-T-P4S	30	62	16	1.00	1.00	37.5	54.5	1.0	1.0	43.7	16.00	10.20	30000	45000	√	0.17
HCB7206-E-T-P4S	30	62	16	1.00	1.00	37.5	54.5	1.0	1.0	43.7	15.30	9.80	26000	40000	√	0.17
B7207-CT-P4S	35	72	17	1.10	1.00	44	63	1.0	1.0	50.7	25.50	18.00	20000	34000	√	0.28
B7207-E-T-P4S	35	72	17	1.10	1.00	44	63	1.0	1.0	50.7	24.50	17.00	19000	32000	√	0.28
HCB7207-C-T-P4S	35	72	17	1.10	1.00	44	63	1.0	1.0	50.7	17.60	8.80	26000	40000	√	0.24
HCB7207-E-T-P4S	35	72	17	1.10	1.00	44	63	1.0	1.0	50.7	16.60	8.50	22000	36000	√	0.24
B7208-CT-P4S	40	80	18	1.10	1.10	48	72	1.0	1.0	56.7	32.00	22.40	18000	30000	√	0.37
B7208-E-T-P4S	40	80	18	1.10	1.10	48	72	1.0	1.0	56.7	30.50	21.60	17000	28000	√	0.37
HCB7208-C-T-P4S	40	80	18	1.10	1.10	48	72	1.0	1.0	56.7	22.00	15.60	24000	38000	√	0.33
HCB7208-E-T-P4S	40	80	18	1.10	1.10	48	72	1.0	1.0	56.7	21.20	15.00	20000	34000	√	0.33
B7209-CT-P4S	45	85	19	1.10	1.10	52.5	78	1.0	1.0	61.8	33.50	24.50	17000	28000	√	0.41
B7209-E-T-P4S	45	85	19	1.10	1.10	52.5	78	1.0	1.0	61.8	32.00	23.60	15000	24000	√	0.41
HCB7209-C-T-P4S	45	85	19	1.10	1.10	52.5	78	1.0	1.0	61.8	23.20	12.20	22000	36000	√	0.34
HCB7209-E-T-P4S	45	85	19	1.10	1.10	52.5	78	1.0	1.0	61.8	22.00	11.60	18000	30000	√	0.34
B7210-CT-P4S	50	90	20	1.10	1.10	57	83	1.0	1.0	66.2	43.00	31.50	16000	26000	√	0.46
B7210-E-T-P4S	50	90	20	1.10	1.10	57	83	1.0	1.0	66.2	40.50	30.50	14000	22000	√	0.46
HCB7210-C-T-P4S	50	90	20	1.10	1.10	57	83	1.0	1.0	66.2	30.00	22.00	20000	34000	√	0.39
HCB7210-E-T-P4S	50	90	20	1.10	1.10	57	83	1.0	1.0	66.2	28.00	21.20	17000	28000	√	0.39
B7211-CT-P4S	55	100	21	1.50	1.50	63	92	1.5	1.5	73.7	46.50	37.50	14000	22000	√	0.61
B7211-E-T-P4S	55	100	21	1.50	1.50	63	92	1.5	1.5	73.7	44.00	35.50	13000	20000	√	0.61
HCB7211-C-T-P4S	55	100	21	1.50	1.50	63	92	1.5	1.5	73.7	32.00	18.30	18000	30000	√	0.51
HCB7211-E-T-P4S	55	100	21	1.50	1.50	63	92	1.5	1.5	73.7	30.50	17.60	15000	24000	√	0.51
B7212-CT-P4S	60	110	22	1.50	1.50	69.5	101.5	1.5	1.5	81.2	55.00	44.00	13000	20000	√	0.80
B7212-E-T-P4S	60	110	22	1.50	1.50	69.5	101.5	1.5	1.5	81.2	52.00	42.50	12000	19000	√	0.80
HCB7212-C-T-P4S	60	110	22	1.50	1.50	69.5	101.5	1.5	1.5	81.2	38.00	30.50	16000	26000	√	0.70
HCB7212-E-T-P4S	60	110	22	1.50	1.50	69.5	101.5	1.5	1.5	81.2	36.00	29.00	14000	22000	√	0.70
B7213-CT-P4S	65	120	23	1.50	1.50	75.5	109.5	1.5	1.5	88.2	57.00	48.00	12000	19000	√	1.02
B7213-E-T-P4S	65	120	23	1.50	1.50	75.5	109.5	1.5	1.5	88.2	54.00	45.50	11000	18000	√	1.02
HCB7213-C-T-P4S	65	120	23	1.50	1.50	75.5	109.5	1.5	1.5	88.2	40.00	23.60	15000	24000	√	0.88
HCB7213-E-T-P4S	65	120	23	1.50	1.50	75.5	109.5	1.5	1.5	88.2	37.50	22.40	13000	20000	√	0.88
B7214-CT-P4S	70	125	24	1.50	1.50	80	115	1.5	1.5	92.7	69.50	58.50	11000	18000	√	1.12
B7214-E-T-P4S	70	125	24	1.50	1.50	80	115	1.5	1.5	92.7	65.50	56.00	10000	17000	√	1.12
HCB7214-C-T-P4S	70	125	24	1.50	1.50	80	115	1.5	1.5	92.7	48.00	40.50	14000	22000	√	0.96
HCB7214-E-T-P4S	70	125	24	1.50	1.50	80	115	1.5	1.5	92.7	45.50	39.00	12000	19000	√	0.96
B7215-CT-P4S	75	130	25	1.50	1.50	85	120	1.5	1.5	97.7	72.00	63.00	11000	18000	√	1.21
B7215-E-T-P4S	75	130	25	1.50	1.50	85	120	1.5	1.5	97.7	68.00	60.00	9500	16000	√	1.21
HCB7215-C-T-P4S	75	130	25	1.50	1.50	85	120	1.5	1.5	97.7	50.00	44.00	14000	22000	√	1.05
HCB7215-E-T-P4S	75	130	25	1.50	1.50	85	120	1.5	1.5	97.7	47.50	41.50	12000	19000	√	1.05
B7216-CT-P4S	80	140	26	2.00	2.00	94	126	2.0	2.0	105.2	73.50	68.00	10000	17000	√	1.52
B7216-E-T-P4S	80	140	26	2.00	2.00	94	126	2.0	2.0	105.2	71.00	64.00	9000	15000	√	1.52
HCB7216-C-T-P4S	80	140	26	2.00	2.00	94	126	2.0	2.0	105.2	51.00	47.50	12000	19000	√	1.40
HCB7216-E-T-P4S	80	140	26	2.00	2.00	94	126	2.0	2.0	105.2	49.00	45.00	11000	18000	√	1.40
B7217-CT-P4S	85	150	28	2.00	2.00	98	138	2.0	2.0	112.3	96.50	85.00	9000	15000	√	1.85
B7217-E-T-P4S	85	150	28	2.00	2.00	98	138	2.0	2.0	112.3	91.50	80.00	8000	13000	√	1.85
HCB7217-C-T-P4S	85	150	28	2.00	2.00	98	138	2.0	2.0	112.3	67.00	58.50	11000	18000	√	1.58
HCB7217-E-T-P4S	85	150	28	2.00	2.00	98	138	2.0	2.0	112.3	63.00	56.00	10000	17000	√	1.58
B7218-CT-P4S	90	160	30	2.00	2.00	104	147	2.0	2.0	118.8	122.00	104.00	8500	14000	√	2.26
B7218-E-T-P4S	90	160	30	2.00	2.00	104	147	2.0	2.0	118.8	116.00	100.00	7500	12000	√	2.26
HCB7218-C-T-P4S	90	160	30	2.00	2.00	104	147	2.0	2.0	118.8	85.00	73.50	11000	18000	√	1.86
HCB7218-E-T-P4S	90	160	30	2.00	2.00	104	147	2.0	2.0	118.8	80.00	69.50	9000	15000	√	1.86
B7219-CT-P4S	95	170	32	2.10	2.10	110.5	154	2.0	2.0	125.8	127.00	114.00	8000	13000	√	2.78
B7219-E-T-P4S	95	170	32	2.10	2.10	110.5	154	2.0	2.0	125.8	122.00	108.00	7000	11000	√	2.78
HCB7219-C-T-P4S	95	170	32	2.10	2.10	110.5	154	2.0	2.0	125.8	88.00	80.00	10000	17000	√	2.36
HCB7219-E-T-P4S	95	170	32	2.10	2.10	110.5	154	2.0	2.0	125.8	83.00	75.00	8500	14000	√	2.36
B7220-CT-P4S	100	180	34	2.10	2.10	114.5	165.5	2.1	2.1	132.4	132.00	122.00	7500	12000	√	3.32
B7220-E-T-P4S	100	180	34	2.10	2.10	114.5	165.5	2.1	2.1	132.4	125.00	116.00	6700	10000	√	3.32
HCB7220-C-T-P4S	100	180	34	2.10	2.10	114.5	165.5	2.1	2.1	132.4	91.50	85.00	9500	16000	√	2.87
HCB7220-E-T-P4S	100	180	34	2.10	2.10	114.5	165.5	2.1	2.1	132.4	86.50	81.50	8000	13000	√	2.87
B7221-CT-P4S	105	190	36	2.10	2.10	120.5	174.5	2.1	2.1	139.9	163.00	146.00	7000	11000	√	4.0
B7221-E-T-P4S	105	190	36	2.10	2.10	120.5	174.5	2.1	2.1	139.9	156.00	140.00	6300	9500	√	4.0
HCB7221-C-T-P4S	105	190	36	2.10	2.10	120.5	174.5	2.1	2.1	139.9	112.00	102.00	9000	15000	√	3.3
HCB7221-E-T-P4S	105	190	36	2.10	2.10	120.5	174.5	2.1	2.1	139.9	106.00	98.00	7500	12000	√	3.3
B7222-CT-P4S	110	200	38	2.10	2.10	126.5	183.5	2.1	2.1	147.4	163.00	150.00	6700	10000	√	4.7
B7222-E-T-P4S	110	200	38	2.10	2.10	126.5	183.5	2.1	2.1	147.4	153.00	143.00	6000	9000	√	4.7
HCB7222-C-T-P4S	110	200	38	2.10	2.10	126.5	183.5	2.1	2.1	147.4	112.00	104.00	8500	14000	√	4.0
HCB7222-E-T-P4S	110	200	38	2.10	2.10	126.5	183.5	2.1	2.1	147.4	106.00	98.00	7000	11000	√	4.0
B7224-CT-P4S	120	215	40	2.10	2.10	140	195	2.1	2.1	158.0	204.00	196.00	6000	9000	√	5.5
B7224-E-T-P4S	120	215	40	2.10	2.10	140	195	2.1	2.1	158.0	196.00	186.00	5300	8000	√	5.5
HCB7224-C-T-P4S	120	215	40	2.10	2.10	140	195	2.1	2.1	158.0	140.00	137.00	7500	12000	√	4.4
HCB7224-E-T-P4S	120	215	40	2.10	2.10	140	195	2.1	2.1	158.0	134.00	129.00	6300	9500	√	4.4
B7226-CT-P4S	130	230	40	3.00	3.00	148	211.5	2.5	2.5	170.5	212.00	216.00	5600	8500	√	6.3
B7226-E-T-P4S	130	230	40	3.00	3.00	148	211.5	2.5	2.5	170.5	204.00	204.00	5000	7500	√	6.3
HCB7226-C-T-P4S	130	230	40	3.00	3.00	148	211.5	2.5	2.5	170.5	146.00	150.00	7000	11000	√	5.2
HCB7226-E-T-P4S	130	230	40	3.00	3.00	148	211.5	2.5	2.5	170.5	140.00	143.00	6000	9000	√	5.2
B7228-CT-P4S	140	250	42	3.00	3.00	163	226.5	2.5	2.5	185.5	220.00	232.00	5000	7500	√	8.1
B7228-E-T-P4S	140	250	42	3.00	3.00	163	226.5	2.5	2.5	185.5	212.00	224.00	4500	6700	√	8.1
HCB7228-C-T-P4S	140	250	42	3.00	3.00	163	226.5	2.5	2.5	185.5	153.00	163.00	6300	9500	√	6.8
HCB7228-E-T-P4S	140	250	42	3.00	3.00	163	226.5	2.5	2.5	185.5	146.00	156.00	5300	8000	√	6.8
B7230-CT-P4S	150	270	45	3.00	3.00	178	241.5	2.5	2.5	200.5	228.00	255.00	4500	6700	√	10.3
B7230-E-T-P4S	150	270	45	3.00	3.00	178	241.5	2.5	2.5	200.5	216.00	240.00	4000	6000	√	10.3
HCB7230-C-T-P4S	150	270	45	3.00	3.00	178	241.5	2.5	2.5	200.5	156.00	176.00	5600	8500	√	9.0
HCB7230-E-T-P4S	150	270	45	3.00	3.00	178	241.5	2.5	2.5	200.5	150.00	166.00	5000	7500	√	9.0
B7232-C-T-P4S	160	290	48	3.00	3.00	191	259	2.5	1.0	215.5	245.00	285.00	4300	6300	√	13.0
B7232-E-T-P4S	160	290	48	3.00	3.00	191	259	2.5	1.0	215.5	232.00	270.00	3800	5600	√	13.0
HCB7232-C-T-P4S	160	290	48	3.00	3.00	191	259	2.5	1.0	215.5	170.00	200.00	5300	8000	√	11.6
HCB7232-E-T-P4S	160	290	48	3.00	3.00	191	259	2.5	1.0	215.5	160.00	190.00	4500	6700	√	11.6
B7234-C-T-P4S	170	310	52	4.00	4.00	205	275	3.0	3.0	228.6	300.00	360.00	4000	6000	√	16.0
B7234-E-T-P4S	170	310	52	4.00	4.00	205	275	3.0	3.0	228.6	280.00	345.00	3600	5300	√	16.0
B7236-C-T-P4S	180	320	52	4.00	4.00	213.5	286.5	3.0	3.0	238.6	305.00	390.00	3800	5600	√	16.8
B7236-E-T-P4S	180	320	52	4.00	4.00	213.5	286.5	3.0	3.0	238.6	290.00	365.00	3400	5000	√	16.8
B7238-C-T-P4S	190	340	55	4.00	4.00	223.5	306.5	3.0	3.0	253.6	315.00	415.00	3400	5000	√	20.3
B7238-E-T-P4S	190	340	55	4.00	4.00	223.5	306.5	3.0	3.0	253.6	300.00	390.00	3200	4800	√	20.3
B7240-C-T-P4S	200	360	58	4.00	4.00	238.5	321.5	3.0	3.0	268.6	325.00	440.00	3200	4800	√	24.4
B7240-E-T-P4S	200	360	58	4.00	4.00	238.5	321.5	3.0	3.0	268.6	310.00	415.00	3000	4500	√	24.4
B7244-C-T-P4S	220	400	65	4.00	4.00	264	356	3.0	3.0	296.2	400.00	560.00	2800	4300	√	33.6
B7244-E-T-P4S	220	400	65	4.00	4.00	264	356	3.0	3.0	296.2	380.00	540.00	2600	4000	√	33.6

Quality Standard

Rockewell Bearings has added parameters that are not defined by ISO/ABEC for customers, including preload tolerances, functional tests, traceability and micron codes, cleanliness, raceway curvature, balls, etc. and roundness, surface processing (function And non-functional surfaces), steel specifications, cage trim and design, and installation chamfering. The definition of these parameters improves the quality of precision angular contact ball bearing products, thereby improving the performance of machine tool spindles.
The element of precision angular contact ball bearings is the cage, which is very important for machine tool bearings. The performance of the cage will affect the stability of machine tool bearings under high-speed rotation. The standard cage produced by Rockewell is made of phenolic resin. The internal design and the tolerance of the pocket gap are tight and the guide surface is controlled to ensure the stability of the cage during high-speed operation, lubrication and dynamic load.
The two elements of precision angular contact ball bearings are cleanliness, which is very important for precision angular contact ball bearings. Generally, the parts of the bearing products must be cleaned with a multi-solvent for 3 hours to prevent impurities from entering the bearing and prevent inherent pollution sources. In addition, the non-working surface of the bearing must be ground to ensure that the bearing is free of impurities before leaving the factory. Therefore, the bearing products produced by Rockewell can increase the normal operating time of the machine tool.
There are two main structural design methods for precision angular contact ball bearings: the high-rigidity WI series and the high-speed HX series to meet the requirements of different applications. The basic, open Rockewell bearing design has a higher spindle speed and greater dynamic radial stiffness, so the spindle can cut more material in a shorter time while ensuring excellent finished product tolerances. These improvements are attributed to the combination of the ball body and the precision engineering design of the raceway profile, which improves the processing rate.

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