Product Details

Specifications

Roots blower bearing QJF238M
1.Gcr15 material
2.High loads
3.Used in machinery
4.ISO:9001:2000

Roots blower single row angular contact ball bearing QJF238M

Descriptions of Roots blower bearing QJF238M

Angular contact ball bearings have raceways in the inner and outer rings that are displaced with respect to each other in the direction of the bearing axis. In particular, double row angular contact ball bearings can accommodate radial and axial loads acting in both directions. In addition, they can provide stiff bearing arrangements and can handle tilting moments.

1) Bearing series: 7000 series, 7200 series, 7300 series, QJ series, 3200 series,3300 series

2) Material of rings and balls : chrome steel:GCr15 or ceramics: Zr02 and Si3N4

3) Material of cage: steel cage , nylon cage,brass cage and PEEK PI cage,AISI SUS316

4) Precision: P0, P6,p5

5) Suffix:

a) C: contact angle is 15 E.G. 7205C

b) AC: contact angle is 25 E.G. 7206AC

c) B : contact angle is 40 E.G. 7206B

d) QJ: contact angle is 35 E.G. QJ308

6) Typical applications: the electrical household, electrical tools, machines automobile,appearance,and electric motor

Single row angular contact ball bearings feature raceways with high and low shoulders. These opposing raceways are designed to carry thrust load in one direction. NTN can preload the bearings at the factory so that the correct load will develop once the bearing is put into service. The bearings in this series are assembled with a specific internal clearance, so that they will have a specified contact angle under load. The standard contact angle used by NTN is 30° but, in many cases, a 40° contact angle can also be specified. We also offer special high-speed bearings with phenolic resin cages with a 15° contact angle.

Double row angular contact ball bearings have an inner and outer ring with a double raceway. The two rows are so related that the contact angle is similar to a pair of back-to-back single row bearings. NTN’s 5200 and 5300 series offer continuous races and can carry thrust loads in either direction. The 3200 and 3300 series have filling slots, so it is necessary to mount them with the thrust load acting against the un-notched face of the rings.

Angular contact ball bearing, is made of Chrome Steel. which have a contact angle so that they can sustain significant axial loads in one direction together with radial loads.

Angular Contact Ball Bearing is mainly applied on high speed, high precision and little axial load occasions, such as airplane engine main shaft, machine tool main shaft and main shafts of other high speed precision machine. It can also be applied on high frequency motor, steam turbine, oil pump, air compressor and printing machine etc. It is one of the bearings most widely used in machinery industry.

Specifications of Roots blower bearing QJF238M

Model Number	QJF238M
Brand Name	CLUNT
Structure	Angular Contact
Type	ball
Dimension	19034055mm
Seals Type	Open
Material	Ring Material Chrome Steel , Carbon steel, Stainless steel
Cage material	Nylon , steel , brass
Clearance	C0, C2, C3, C4, C5
Vibration	Zv1, Zv2 and Zv3
Precision Rating	P0, P6, P5
Greese	As you requirement, such as SRL , PS2, Alvania R12 and so on.
Number of Row	Single Row
Application	Home appliances, low noise and high speed electric motors, automotive components, pumps, machinery.

What is mean Angle of angular contact ball bearing?

Angle is bearing stress direction and the vertical Angle.

Angle is smaller, bearing of the radial force is bigger, the smaller the axial force

Commonly used 15 degree is high precision, high speed, which mainly bear radial force and a small number of axial force of angular contact ball bearing

25 degrees and 30 degrees Angle bear radial force relative is big

Forty degrees Angle of the bearing of the axial force is the largest, suitable for axial load and equipment installed in a vertical occasions

Angular contact ball bearing types:

single row angular contact ball bearing:only bear a direction of the axial load. In bear radial load, can cause additional axial force must be applied to the corresponding reverse load, therefore, the bearings are generally used in pairs

double row angular contact ball bearing: Can bear larger in radial direction load primarily radial, axial two-way joint load and torque load, it can restrict shaft or shell two-way axial displacement, the contact Angle is 30 degrees.

four point angular contact ball bearing: also withstand torque load, with the single row angular contact ball bearing and double row angular contact ball bearing function

Paired configuration of angular contact ball bearing have three kinds of different configuration pattern:

(1) Back-to-back configuration,rear code is DB, The configuration of the rigid good, bear overturning moment performance good, bearing can be subject to bi-directional load

(2) Face to face configuration,rear code is DF, This configuration rigidity and the ability to withstand overturning moment as DB configuration form, the bearing can be subject to bi-directional load

(3) Series configuration,rear code is DT, This configuration also available in the same bearing place series three or more bearing, but only under single direction of the axial load

Model numbers

Model	Size
QJF1017M	85 x 130 x 22
QJF1018M	90 x 140 x 24
QJF1018	90 x 140 x 24
QJF1018X1	90 x 139.5 x 24
QJF1020M	100 x 150 x 24
QJF1020	100 x 150 x 24
QJF1026M	130 x 200 x 33
QJF1026X1M	130 x 199.5 x 33
QJF1026Q4	130 x 200 x 33
QJF1026	130 x 200 x 33
QJF1028M	140 x 210 x 33
QJF1028X1M	140 x 209.5 x 33
QJF1028	140 x 210 x 33
QJF1030M	150 x 225 x 35
QJF1030X1	150 x 224.5 x 35

bearing NO	d	D	B	KG
3200	10	30	14.3	0.051
3201	12	32	15.9	0.060
3202	15	35	15.9	0.069
3203	17	40	17.5	0.099
3204	20	47	20.6	0.166
3205	25	52	20.6	0.183
3206	30	62	23.8	0.303
3207	35	72	27.0	0.458
3208	40	80	30.2	0.627
3209	45	85	30.2	0.678
3210	50	90	30.2	0.698
3211	55	100	33.3	1.070
3212	60	110	36.5	1.340
3213	65	120	38.1	1.680
3214	70	125	39.7	1.840
3215	75	130	41.3	2.010
3216	80	140	44.4	2.710
3217	85	150	49.2	3.480
3218	90	160	52.4	4.24