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30300 Series Tapered Roller Bearing
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ISUTAMI BEARINGS

30300 Series Tapered Roller Bearing

30300 Series Tapered Roller Bearing
ISUTAMI tapered roller bearings 30300 Series belong to the separated type bearings, and the inner and outer rings of the bearings have conical row raceways.When the conical roller bearing equipment needs regular maintenance, operation and peripheral parts are changed, it is necessary to judge whether the bearing parts can be used again and record the operation status.If any of the inner and outer rings, rollers, or retainers are cracked or fragmented.The surface of inner and outer ring or rolling body is peeled off.The raceway surface, side stop or rolling body is obviously stuck.Serious wear of cage or obvious loosening of rivet.The raceway surface and the rolling body are rusty and scarred.Marked indentation on rolling surface or rolling body.Having traces of movement on the inner diameter of the inner ring or on the outer diameter of the outer ring.Surface discoloration caused by overheating.Damage of sealing ring and dust cover of grease seal bearing.These circumstances require timely replacement of the bearing.
30300 Series Tapered Roller Bearing
ISUTAMI tapered roller bearings 30300 Series belong to the separated type bearings, and the inner and outer rings of the bearings have conical row raceways.When the conical roller bearing equipment needs regular maintenance, operation and peripheral parts are changed, it is necessary to judge whether the bearing parts can be used again and record the operation status.If any of the inner and outer rings, rollers, or retainers are cracked or fragmented.The surface of inner and outer ring or rolling body is peeled off.The raceway surface, side stop or rolling body is obviously stuck.Serious wear of cage or obvious loosening of rivet.The raceway surface and the rolling body are rusty and scarred.Marked indentation on rolling surface or rolling body.Having traces of movement on the inner diameter of the inner ring or on the outer diameter of the outer ring.Surface discoloration caused by overheating.Damage of sealing ring and dust cover of grease seal bearing.These circumstances require timely replacement of the bearing.

30300 Series Tapered Roller Bearing Size Chart

tapered Roller Bearing 30300 Series

Bearing Principal Dimensions (mm) Mass
No. d D T B C kg
30302 15 42 14.25 13 11 0.095
30303 17 47 15.25 14 12 0.13
30304 20 52 16.25 15 13 0.17
30305 25 62 18.25 17 15 0.26
30306 30 72 20.75 19 16 0.39
30307 35 80 22.75 21 18 0.52
30308 40 90 25.25 32.5 28 0.72
30309 45 100 27.25 25 22 0.97
30310 50 110 29.25 27 23 1.25
30311 55 120 31.5 29 25 1.55
30312 60 130 33.5 31 26 1.95
30313 65 140 36 33 28 2.4
30314 70 150 38 35 30 2.9
30315 75 160 40 37 31 3.45
30316 80 170 42.5 39 33 4.1
30317 85 180 44.5 41 34 4.85
30318 90 190 46.5 43 36 5.65
30319 95 200 49.5 45 38 6.7
30320 100 215 51.5 47 39 8.05
30321 105 225 53.5 49 41 9.15
30322 110 240 54.5 50 42 11
30324 120 260 59.5 55 46 14
30326 130 280 63.75 58 49 17
30328 140 300 67.75 62 53 21
30330 150 320 72 65 55 28.5
30332 160 340 75 68 58 29

30300 Series Tapered Roller Bearing Features

When tapered roller bearing is running, the sound of the product running can also be controlled by the impact sound of the rolling body, such as reducing the radial clearance properly, using the bearing with reasonable structure and flexible material cage.Raceway sound is a kind of smooth and continuous sound when the bearing is running and its rolling body is rolling on the raceway surface.The general bearing sound is the raceway sound plus other sound.The greater the rigidity of the bearing seat, the lower the sound pressure level of the raceway sound.If the radial clearance is too small, the sound pressure level and main frequency of raceway sound will increase sharply with the decrease of radial clearance.
There are many ways to control the sound of raceway. The low-noise bearing is the one with small waviness.Raceway noise often affects the noise of the whole machine, reducing the raceway noise can reduce the noise of the whole machine.Rolling sound of tapered roller bearing and its control method rolling sound is a strident metal friction sound that may occur in all occasions, which mostly occurs in grease lubricated larger type bearings, but is more likely to occur in base oil lubricants with poor performance, and hardly occurs in oil lubricants.In addition, it is easy to occur in winter, when the pure radial load is borne, it is easy to occur in the case of large radial clearance, and with the difference of model size, it is easy to occur in a specific speed range, both continuously and intermittently.Adopting special processing method for outer ring raceway can prevent the occurrence of rolling sound. If necessary, this kind of bearing can be selected, or the radial clearance of the bearing can be reduced appropriately, and the excellent grease can be used to improve the rigidity of the matching parts with the bearing.

Tapered roller bearings due to the diameter of axle and the size of the rolling mill bearing hole measurement inaccurate or cooperate with surface roughness, do not meet the standard requirements to cause excessive interference fit, the bearing race is being squeezed from a large, thus reduce the radial clearance of the bearing itself, difficult to rotate the tapered roller bearings, fever, wear or jammed, caused serious bearing inner and outer race in cracking during installation.
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