Find high quality high precision ball screw support bearings with competitive price here. Please rest assured to buy high precision ball screw support bearings with Luoyang Bearing Science & Technology Co.,Ltd

Ball screw support bearings performance

1.ZYS precision Ball screw support bearing is a kind of one-direction angular contact thrust ball bearing (60° contact angle) with high accuracy, high speed, high axial rigidity, low friction, long life and transient high/low speed conversion. The bearing is particularly suitable for the ball screw support and similar transmitting components in high-speed precision CNC machine tools. 

Ball screw support bearings

ZYS precision ball screw support bearings including four series: 7602, 7603, BS, BSS. The standard7602 and 7603 series correspond to Chinese Mechanical standard, with the bore diameters from 12mm to 130mm; BS series are non-standard metric and BSS series are inch series.

 

Ball screw support bearings can support larger axial load in one direction and a certain radial load. These bearings are usually arranged in duplex or multiple sets with the same arranging modes as the way of angular contact ball bearings.

2.Sealed ball screw support bearings 

In order to meet the developing trend of smaller machine tool with more compact structure, ZYS developed sealed ball screw support bearings. The seals at both ends of bearing can prevent cutting fluid and metal scrap into the bearing.

Sealed ball screw support bearings

3.Ball screw support bearings units

ZYS ball screw support bearings units refer to combining matched bearings and relevant 

accessories together into ball screw support components, with simple mounting, convenient use, reliable operation and such features.

According to the different bearings arranging modes, ZYS ball screw support bearing units have three types: BSDU……DF, BSTU……TFT and BSQU……QFC.

4.The preload and axial rigidity of high precision ball screw support bearings

The preload and axial rigidity of high precision ball screw support bearings (Standard Metric)

Bearing designation ZYS	Preload Fa0	Axial   rigidity Ra	Bearing designation ZYS	Preload Fa0	Axial   rigidity Ra
	KN	N/µm		KN	N/µm
760201TN1	1.4	470	760304TN1	2.9	780
760202TN1	1.4	510	760305TN1	3.3	910
760203TN1	1.7	590	760306TN1	4.3	1070
760204TN1	2.3	700	760307TN1	4.8	1190
760205TN1	2.5	770	760307X3TN1	5.6	1290
760206TN1	2.9	890	760308TN1	5.6	1290
760207TN1	3.3	1020	760309TN1	7.0	1470
760208TN1	4.3	1180	760309X3TN1	7.6	1600
760209TN1	4.5	1240	760310TN1	7.6	1600
760210TN1	4.9	1360	760311TN1	8.8	1720
760211TN1	4.6	1390	760312TN1	10.0	1840
760212TN1	6.5	1620	760313TN1	12.0	2050
760213TN1	7.0	1750	760314TN1	12.0	2100
760214TN1	7.0	1750	760315TN1	14.5	2330
760215TN1	7.6	1880	760316TN1	16.0	2460
760216TN1	8.9	2040	760317TN1	17.5	2530
760217TN1	10.5	2200	760318TN1	18.0	2650
760218TN1	11.0	2270	760319TN1	19.0	2770
760219TN1	12.5	2430	760320TN1	21.5	2960
760220TN1	14.0	2590	760322TN1	29.3	3360
760222TN1	16.4	2800	760324TN1	31.3	3550
760224TN1	20.6	3130	760326TN1	33.7	3800
760226TN1	20.6	3280

5.Tolerances of shaft and housing fit for ball screw support bearings

Tolerances of shaft fit for ball screw support bearings (µm)

Shaft diameter d(?)	From Up to	10 18	18 30	30 50	50 80	80 120	120 180	180 250	250 315
Tolerance	Upper deviation	0	0	0	0	0	0	0	0
	Lower deviation	-8	-9	-11	-13	-15	-18	-20	-23
Cylindricity	t1	2	2.5	2.5	3	4	5	7	8
Flatness	t2	1.2	1.5	1.5	2	2.5	3.5	4.5	6
End face runnout	t3	2	2.5	2.5	3	4	5	7	8
Roughness on surface	Ra	0.4	0.4	0.4	0.4	0.4	0.4	0.8	0.8

 

Tolerances of housing fit for ball screw support bearings (µm)

Housing diameter D(?)	From Up to	18 30	30 50	50 80	80 120	120 180	180 250	250 315	315 400
Tolerance	Upper deviation	+8	+10	+13	+16	+18	+22	+25	+29
	Lower deviation	-5	-6	-6	-6	-7	-7	-7	-7
Cylindricity	t1	2.5	2.5	3	4	5	7	8	9
Flatness	t2	2.5	2.5	3	4	5	7	8	9
End face runnout	t3	4	4	5	6	8	10	12	13
Roughness on surface	Ra	0.8	0.8	0.8	0.8	0.8	0.8	1.6	1.6

6.Comparison table of bearing designations between ZYS and other manufacturers

Bearing types	ZYS	SNFA	FAG	SKF	NSK	GMN	FAFNIR	RHP
Angular contact ball bearing	718	SEA
	719	SEB	B719	719	79	S619	93W1	79
	70	EX	B70	70	70	S60	91W1	70
	72	E200	B72	72	72	S62	2W1	72
	H719	VEB	HS719		BNC19		993WN	S79
	H70	VEX	HS70	70CC	BNC10	SH60	991WN	S70
	B719-2RZ		HSS719
	B70-2RZ		HSS70
	B70					SN60	91WO
Cylindrical roller bearing	N1OK		N10K	N10AK	N10KR
	NN30K		NN30K	NN30K	NN30KR
	2344		2344	2344	TAC20X
	2347		2347	2347
	70A/DB				BA10X
	70B/DB				BA10X
Tapered roller bearing	320		320X	320X
	7602	BS200	7602	BSA2	TAC02
	7603		7603	BSA3	TAC03
	BS		BSB	BSD	TAC
	BSS			BDAB	TAC

Luoyang Bearing has been engaged in high precision ball screw support bearings since 1958, and we are known as one of the leading bearing manufacturers and suppliers for our quality products and excellent services. Please rest assured to buy the good products from our factory.