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Thin Section Bearings

Spindle Bearings

A spindle bearing is a high-precision, specialized ball bearing designed for the central rotating shaft (spindle) in machine tools and other equipment, allowing it to spin at extremely high speeds with exceptional accuracy, rigidity, and smooth movement, supporting heavy radial and axial loads crucial for precision cutting and grinding. They often use angular contact designs and require preloading to maintain stiffness and are essential for achieving tight tolerances in manufacturing.

Contact angles & configurations: Angular contact design with matched set options (DB, DF, DT) for preload control and rigidity enhancement.

Size: Bore sizes (inner diameter) range: 10mm to 300mm; cross-section sizes starting from 12mm.

Materials & precision: Rings (GCr15 chrome steel, 440C stainless steel, ceramic hybrid); cages (phenolic resin, brass, polyamide, stainless steel);

Accuracy ：P5, P4, P2

Delivery & Customization: A wide range of standard models are available in stock; customized bearings (size, precision, material) can be delivered in 7–20 days.

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Techspecs

618 Series
Dimensions				Basic Load Rating		Designation	Weight	Installation Size			Limiting Speed
mm				kN			kg	mm			r/min
d	D	B	rmin	Cr	Cor		kg	damin	Damax	ramax	Grease	Oil
100	125	13	1	19.6	21.2	61820	0.31	105	120	1	4800	5700
110	140	16	1	28.1	30.7	61822	0.61	115	135	1	4300	5100
120	150	16	1	29	33	61824	0.66	125	145	1	4000	4700
130	165	18	1.1	36.9	41.2	61826	0.94	136.5	158.5	1	3600	4300
140	175	18	1.1	38.2	44.4	61828	1	146.5	168.5	1	3400	4000
150	190	20	1.1	49.1	58.5	61830	1.15	156.6	183.5	1	3000	3600
160	200	20	1.1	48.5	61	61832	1.23	166.5	193.5	1	2800	3400
170	215	22	1.1	61.5	78	61834	1.9	176.5	208.5	1	2600	3200
180	225	22	1.1	62.3	78.5	61836	1.72	186.5	218.5	1	2400	3000
190	240	24	1.5	75.1	93.5	61838	2.53	198	232	1.5	2200	2800
200	250	24	1.5	74	98	61840	2.67	208	242	1.5	2200	2800
220	270	24	1.5	76.5	97.8	61844	2.9	228	262	1.5	1900	2400
240	300	28	2	83.5	108	61848	4.48	249	291	2	1800	2200
260	320	28	2	101	148	61852	4.84	269	311	2	1700	2000
280	350	33	2	133	191	61856	7.2	289	341	2	1600	1900
Dimensions				Basic Load Rating		Designation	Weight	Installation Size			Limiting Speed
mm				kN			kg	mm			r/min
d	D	B	rmin	Cr	Cor		kg	damin	Damax	ramax	Grease	Oil
300	380	38	2.1	166	233	61860	10.3	311	369	2	1400	1700
320	400	38	2.1	168	244	61864	10.8	331	389	2	1300	1600
340	420	38	2.1	175	265	61868	11.5	351	409	2	1200	1500
360	440	38	2.1	192	290	61872	11.8	371	429	2	1100	1400
380	480	46	2.1	238	375	61876	19.5	391	469	2	1000	1300
400	500	46	2.1	241	390	61880	20.5	411	489	2	1000	1300
420	520	46	2.1	245	410	61884	21.4	431	509	2	950	1200
440	540	46	2.1	249	425	61888	22.3	451	529	2	900	1100
460	580	56	3	310	550	61892	34.3	473	567	2.5	900	1100
480	600	56	3	315	575	61896	35.4	493	587	2.5	850	1000
500	620	56	3	320	600	618/500	37.2	513	607	2.5	800	950
530	650	56	3	325	625	618/530	39.8	543	637	2.5	750	900
560	680	56	3	330	650	618/560	41.5	573	667	2.5	700	850
600	730	60	3	355	735	618/600	50.9	613	717	2.5	670	800
Dimensions				Basic Load Rating		Designation	Weight	Installation Size			Limiting Speed
mm				kN			kg	mm			r/min
d	D	B	rmin	Cr	Cor		kg	damin	Damax	ramax	Grease	Oil
630	780	69	4	420	890	618/630	71.3	646	767	3	630	750
670	820	69	4	435	965	618/670	75.4	686	807	3	560	670
710	870	74	4	480	1100	618/710	92.6	726	854	3	530	630
750	920	78	5	525	1260	618/750	110	770	900	4	500	600
800	980	82	5	530	1310	618/800	132	820	960	4	450	530
850	1030	82	5	559	1430	618/850	140	868	1012	4	410	470
900	1090	85	5	618	1532	618/900	160	920	1070	4	350	410
950	1150	90	5	637	1730	618/950	190	968	1132	4	290	350
619 Series
Dimensions				Basic Load Rating		Designation	Weight	Installation Size			Limiting Speed
mm				kN			kg	mm			r/min
d	D	B	rmin	Cr	Cor		kg	damin	Damax	ramax	Grease	Oil
100	140	20	1.1	45	41.9	61920	0.96	106.5	133.5	1	4500	5300
110	150	20	1.1	47.9	47.8	61922	1.04	116.5	43.5	1	4100	4900
120	165	22	1.1	57.2	56.9	61924	1.41	126.5	158.5	1	3800	4400
130	180	24	1.5	69.6	70	61926	1.86	138	172	1.5	3400	4100
140	190	24	1.5	71.3	74.8	61928	1.98	148	182	1.5	3200	3800
150	210	28	2	85	90.5	61930	2.59	159	201	2	2800	3400
160	220	28	2	87	96	61932	2.71	169	211	2	2600	3200
170	230	28	2	88.8	100	61934	2.85	179	221	2	2400	3000
180	250	33	2	119	133	61936	4.16	189	241	2	2200	2800
190	260	33	2	117	133	61938	5.18	199	251	2	2200	2800
200	280	38	2.1	149	168	61940	7.28	211	269	2	2000	2600
220	300	38	2.1	152	178	61944	7.88	231	289	2	1900	2400
240	320	38	2.1	154	190	61948	8.49	251	309	2	1800	2200
260	360	46	2.1	210	268	61952	14	271	349	2	1600	1900
280	380	46	2.1	209	272	61956	15.1	291	369	2	1500	1800
Dimensions				Basic Load Rating		Designation	Weight	Installation Size			Limiting Speed
mm				kN			kg	mm			r/min
d	D	B	rmin	Cr	Cor		kg	damin	Damax	ramax	Grease	Oil
300	420	56	3	270	375	61960	24.5	313	407	2.5	1300	1600
320	440	56	3	275	392	61964	25.3	333	427	2.5	1200	1500
340	460	56	3	292	418	61968	26.6	353	447	2.5	1100	1400
360	480	56	3	280	425	61972	27.9	373	467	2.5	1100	1400
380	520	65	4	338	540	61976	40	425	475	3	1000	1300
400	540	65	4	335	540	61980	42	416	524	3	950	1200
420	560	65	4	340	570	61984	43.6	436	544	3	900	1100
440	600	74	4	395	680	61988	60.2	456	584	3	900	1100
460	620	74	4	405	720	61992	62.6	476	604	3	850	1000
480	650	78	5	450	815	61996	73.5	500	630	4	800	950
500	670	78	5	460	865	619/500	82	520	650	4	750	900
530	710	82	5	455	870	619/530	89.8	550	690	4	750	900
560	750	85	5	525	1040	619/560	105	580	730	4	670	800
600	800	90	5	550	1160	619/600	120	620	780	4	630	750
Dimensions				Basic Load Rating		Designation	Weight	Installation Size			Limiting Speed
mm				kN			kg	mm			r/min
d	D	B	rmin	Cr	Cor		kg	damin	Damax	ramax	Grease	Oil
630	850	100	6	625	1350	619/630	163	654	826	5	600	700
670	900	103	6	675	1460	619/670	181	694	876	5	530	630
710	950	106	6	715	1640	619/710	220	734	926	5	500	600
750	1000	112	6	785	1840	619/750	245	774	976	5	480	560
800	1060	115	6	825	2050	619/800	275	824	1036	5	430	500
850	1120	118	6	832	2160	619/850	310	873	1090	5	380	440
900	1180	122	6	852	2280	619/900	350	923	1157	5	320	380
950	1250	132	6	1010	2800	619/950	390	978	1222	5	260	320
718 Series
Dimensions					Basic Load Rating		Designation	Weight	Installation Size
mm					kN			kg	mm
d	D	B	Tmin	hmin	Cr	Cor		kg	da	Da	Ta	ra1
100	128	13	1	0.3	21.2	27.5	71820	0.2	104.6	120.4	1	1
110	140	16	1	0.3	31.9	40.5	71822	0.51	114.6	135.4	1	1
120	150	16	1	0.3	33.2	45	71824	0.55	124.8	145.4	1	1
130	165	18	1.1	0.6	39	53	71826	0.7	136	159		1
140	175	18	1.1	0.6	44.9	62	71828	0.8	146	169	1	1
150	190	20	1.1	0.6	53.5	74.5	71830	1.32	156	184	1	1
160	200	20	1.1	0.6	54	78	71832	1.25	166	194	1	1
170	215	22	1.1	0.6	80	110	71834	2	175	210	1	1
Dimensions					Basic Load Rating		Designation	Weight	Installation Size
mm					kN			kg	mm
d	D	B	Tmin	hmln	Cr	Cor		kg	da	Da	Ta	ral
200	250	24	1.5	1	90	130	71840	2.5	208.5	241.5	1.5	1
220	270	24	1.5	1	151	263	71844	2.5	228.5	261.5	1.5	1
240	300	28	2	1	128	175	71848	4.1	250	290	2	1
260	320	28	2	1	127	190	71852	4.85	270	310	2	1
280	350	33	2	1	140	216	71856	7.2	290	340	2	1
320	400	38	2.1	1.1	190	290	71864	10	332	388	2	1
340	440	38	2.1	1.1	219	345	71872	11.1	372	428	2	1
360	480	46	2.1	1.1	261.9	450	71876	18	392	468	2	1
380	500	46	2.1	1.1	292	501	71880	19.5	412	488	2	1
Dimensions					Basic Load Rating		Designation	Weight	Installation Size
mm					kN			kg	mm
d	D	B	Tmin	hmin	Cr	Cor		kg	da	Da	Ta	Ta1
420	520	46	2.1	1.1	294	513	71884	20.4	432	508	2	1
440	540	46	2.1	1.1	301	540	71888	21.1	452	528	2	1
460	580	56	3	3	334	689	71892	34.5	474	566	2.5	1
480	600	56	3	1.1	415	820	71896	35.5	494	686	2.5	1
500	620	56	3	1.1	351	765	718/500	38	514	606	2.5	1
530	650	56	3	1.1	369	837	718/530	39.5	544	636	2.5	1
560	680	56	3	1.1	341	837	718/560	41.5	574	666	2.5	1
600	730	60	3	1.1	421	1044	718/600	47	614	766	2.5	1
630	780	69	4	1.5	518	1160	718/630	69.7	648	715	3.1	1.5
670	820	69	4	1.5	498	1161	718/670	77	688	802	3	1.5
710	870	74	4	1.5	546	1467	718/710	93.5	725	855	3	1
750	920	78	5	2	585	1620	718/750	110	768	902	4	2
850	1030	82	5	2	620	1674	718/850	140	868	1012	4	2
719 Series719 Series
Dimensions					Basic Load Rating		Designation	Weight	Installation Size
mm					kN			kg	mm
d	D	B	Tmin	hmin	Cr	Cor		kg	da	Da	Ta	ra1
100	140	20	1.1	0.6	60.6	65.5	71920	0.8	106	134	1	1
110	150	20	1.1	0.6	62.4	72	71922	0.86	116	144	1	1
120	150	20	1.1	0.6	24.7	25.5	71924	1.15	116	144	1	1
130	180	24	1.5	0.6	92.3	108	71926	1.55	137	173	1.5	1.5
140	190	24	1.5	0.6	95.6	116	71928	1.65	147	183	1.5	1.5
150	210	28	2	1	90	120	71930	3	160	200	2	1
160	220	28	2	1	109	129	71932	3	170	210	2	1
170	230	28	2	1	110	140	71934	3.3	179	221	2	2
190	260	33	2	1	139	177	71938	4.45	199	255	2	2
Dimensions					Basic Load Rating		Designation	Weight	Installation Size
mm					kN			kg	mm
d	D	B	Tmin	hmln	Cr	Cor		kg	da	Da	Ta	ral
200	280	38	2.1	1.1	150	210	71940	7.1	212	268	2	1
220	300	38	2.1	1.1	200	250	71944	7.2	232	288	2	1
240	320	38	2.1	1.1	203	285	71948	8.37	252	308	2	1
260	360	46	2.1	1.1	242	345	71952	13.5	272	348	2	1
280	380	46	2.1	1.1	226	337	71956	15	292	368	2	1
320	440	56	3	1.1	350	550	71964	25.5	334	426	2.5	1
340	460	56	3	1.1	292	510	71968	27.5	354	446	2.5	1
360	480	56	3	1.1	350	600	71972	29
380	520	65	4	1.5	369	661.5	71976	40.5	395	505	3	1
400	540	65	4	1.5	380.7	702	71980	42	415	525	3	1
Dimensions					Basic Load Rating		Designation	Weight	Installation Size
mm					kN			kg	mm
d	D	B	Tmin	hmin	Cr	Cor		kg	da	Da	Ta	Ta1
420	560	65	4	1.5	327	603	71984	44.5	435	545	3	1
440	600	74	4	3	456.3	936	71988	61	455	585	3	1
460	620	74	4	1.5	456	936	71992	58	475	605	3	1
530	670	78	5	2	498	1098	719/530	78	518	652	4	1
560	710	82	5	2	556	1206	719/560	92	558	692	4	1
600	750	85	5	2	533	1161	719/600	105	578	732	4	2
630	800	90	5	2	644	1557	719/630	125	618	782	4	2
750	950	106	6	3	767	1980	719/750	195	733	927	5	2

Description

Spindle bearings are a crucial component in various types of machinery, particularly in applications requiring high precision and reliability. These bearings are designed to handle high speeds, loads, and radial forces, making them ideal for use in spindles of machine tools, high-speed motors, and other demanding applications. Their superior design and construction allow them to support the rotational movement and stability of the spindle, ensuring smooth operation and extending the machine's overall lifespan. The Spindle bearings can be divided into 4 series: 618 series、619 series、718 series、719 series. With the inner diameter range from 100mm to 950mm, and the precision is divided into P6, P5, P4 and P2. The bearings are available in open and sealed versions. Spindle bearings have restricted tolerances. They are particularly suitable for bearing with very high requirements for guidance accuracy and speed capacity. They have proved highly suitable for the bearing of spindles in machine tools.

Features

High Precision:

Essential for maintaining the accuracy and stability of machinery, ensuring superior performance in high-speed applications.

Durability:

Designed to withstand harsh operating environments, reducing the need for frequent replacements and minimizing downtime.

Customizable:

Can be tailored to meet the specific needs of your equipment, from size and material to lubrication and sealing options.

Enhanced Load Capacity:

Capable of supporting heavy radial and axial loads, making them ideal for demanding industrial applications.

Working Principle

Application & Case

Applications of Spindle Bearings

1. Machine Tool Spindles

CNC machining centers

Milling machines

Lathes

Grinding machines

Ensure high accuracy, rigidity, and surface finish quality.

2. Grinding & Finishing Equipment

Surface grinders

Cylindrical and internal grinders

Tool and cutter grinders

High-speed capability and low runout are essential.

3. Woodworking Machinery

CNC routers

High-speed saw spindles

Provide smooth, stable rotation at high RPM.

4. Precision Automation Equipment

High-speed motors

Servo-driven spindles

Support precise positioning and repeatable motion.

5. Semiconductor & Electronics Manufacturing

PCB drilling machines

Wafer processing equipment

Require ultra-high precision and cleanliness.

6. Aerospace Manufacturing

Precision machining of aircraft components

High stiffness ensures dimensional accuracy.

7. Medical Equipment

Dental spindles

Surgical drilling systems

Low vibration and quiet operation are critical.

8. Textile Machinery

High-speed spinning and winding machines

Operate reliably at very high speeds.

9. Measuring & Inspection Equipment

Coordinate measuring machines (CMMs)

Optical inspection systems

Ensure stable and accurate rotational motion.

10. Specialized High-Speed Equipment

Turbo blowers

High-speed test rigs

Support extreme speeds with precision control.

Sealed Angular Contact Ball Bearings

Luoyang Newbee Transmission: Specialized Bearings for High-Speed Stranding Machines

FAQ

What types of them does Bearing offer?

We offer a variety of them, including angular contact and cylindrical types, available in different sizes and materials to suit various applications.

Can Bearing customize them for specific requirements?

Yes, we provide customized spindle bearing solutions tailored to meet the unique needs of your equipment and working conditions.

What are the benefits of using ceramic them?

Ceramic spindle bearings offer lower friction, reduced wear, and improved speed capabilities, making them ideal for high-speed applications.

How often should them be replaced?

The replacement frequency depends on the operating conditions and maintenance practices. Regular inspections can help determine the appropriate replacement schedule.

CNC Machinery

Precision Bearings

Non-standard Machinery Parts

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