ZWRZ roller bearing Tapered roller bearing 302series

1.Tapered roller bearing are applicable for heavy load and impact load. 2.Mainly for auto fore wheel,rear wheel,transmission .

Tapered roller bearing is designed in such a way that cone paexes of inner ring raceway,outer ring raceway and roller raceway intesects at one point of its central line.Beside metric series products,there are inch series products,which are applicable for heavy load and impact load.

1,Single row tapered roller bearing

It can bear simultaneously radial load and single row axial load.

When carrying radial load,it creates axial thrust load.Thus two bearings are configured (or combined)face to face or back to back.

According to contact angle difference,it is classified into three types:small come angle, medium cone angle and big cone angle.

2,Double row tapered roller bearing

It is classifide into two types:capped and open.

The former equips two raceway outer rings and two single raceway inner rings.The latter equips two raceway outer rings and one double raceway inner ring.Both of them can bear radial load and double row axial load.In order to make bearing having required internal clearance after eing installed,its inner/outer spacer are thinned preciously.

3,Four row tapered roller bearing

Four row tapered roller bearing is composed of two double row inner rings and one double row outer ring consisting two single outer rings.Between two inner rings,there is one inner spacer.Among these three outer rings, two central spacer is furnished,which can be used to adjust clearance. When borne by heavy radial load, it can bear simultaneously acial load in two different directions.But its allowed speed is not much,which is mainly used for roller bearing of rolling mill.In recent years,fout row tapered roller bearing with double face seal is manufactured and gradually used in diferent industries.

Small sized bearing of this kind is generally made by bearing steel.For large sized one, its is made by carburizing steel.For extremely large sized one,it is made consisting hollow roller and support cage to elongate its sercice life.

4,Tolerance and clearance

Its tolerance is P0 generally.Bearing with much more high level tolerance can be tailored according to client's manufacturing.During assembly,its clearance shall be adjusted according to adjustment specification and bearing manufacturing agreement(or standard clearance if there is no manufacturing agreement).After operating a certain period,client can readjust clearance.

Bearing No	d(mm)	D(mm)	B(mm)	Bearing  No	d(mm)	D(mm)	B(mm)
30202	15	35	16	30217	85	150	31
30203	17	40	13.5	30218	90	160	33
30204	20	47	15.5	30219	95	170	35
30205	25	52	16.5	30220	100	180	37.5
30206	30	62	17.5	30221	105	190	39.5
30207	35	72	18.5	30222	110	200	41.5
30208	40	80	20	30224	120	215	44
30209	45	85	21	30226	130	230	44.5
30210	50	90	22	30228	140	250	46.5
30211	55	100	23	30230	150	270	50
30212	60	110	24	30232	160	290	53
30213	65	120	25	30236	180	320	58
30214	70	125	26.5	30240	200	360	65
30215	75	130	27.5	30244	220	400	73
30216	80	140	28.5

ZWRZ roller bearing Tapered roller bearing 302series