NSK Deep Groove Ball Bearings 6025

NSK Bearing installation

NSK bearing installation required in a dry, clean environment under the premise. Should be carefully checked before installation, shaft and housing fits for the surface, shroud the face, the surface of the trench and connection processing quality. All surfaces must be carefully cleaned with the connections and remove the burr, bearings casting a net addition to the necessary raw sand surface.

Bearing installation should be preceded with gasoline or kerosene clean and dry before use, and to ensure good lubrication,  bearings generally use grease lubrication, oil lubrication can be applied. With grease lubrication, should be used free of impurities, oxidation, rust, extreme pressure grease and other functional advantages. Amount of grease filled bearings and bearing capacity of the container 30% -60%, not too much. The structure with sealed double-row tapered roller bearings and water pump bearing grease filled well, the user can be used directly, no further cleaning.

Bearing installation, NSK bearings must face the circumference of the ring to exert equal pressure to the ring pressing, not directly with Lang Percussion bearing first-class tools to face, so as not to damage bearings. Small amount of interference in the case, press and hold at room temperature with the sleeve bearing ring face, beating with a hammer sleeve, through the sleeve will be pressed into the ring in a balanced manner. If the installation of large quantities, can be used hydraulic press. Indentation, should ensure that outer shell shoulder face and the face, the inner end face and the shaft shoulder pressed, will not allow a gap.

When the interference is large, the oil bath can be heated or the sensor heating method to install the bearings, NSK Bearings heating temperature range is 80 °C -100 °C, the maximum can not exceed 120 °C. Meanwhile, the application of nuts or other fastening bearing appropriate methods to prevent the bearing width shrinkage after leaving the cooling ring and the gap between the shaft shoulder.

Single row tapered roller bearing clearance to install the final adjustment should be carried out. Clearance value should be based on the use of different conditions and with the amount of interference to determine the size and detail. Necessary, should be studied to determine. Double row tapered roller bearings and water pump bearing has been adjusted at the factory clearance, without further adjustment during installation.

Bearing rotation test should be carried out after installation, the first for the rotary shaft or bearing housing, bearings without exception, then the driving force for no-load, low speed operation, and then gradually progress as the functioning of the rotation speed and load, and to detect noise, vibration and temperature, abnormal, should stop and check operation. Normal operation after test before delivery

bearing on the principle that we all know, but after bearing to be removed when using inheritance, should use the appropriate removal tools. Demolition of the interference fit ring, can only increase tension on the ring, move the body without passing through the demolition of promised power, or move the body and the raceway will be crushed.

NSK Bearing tolerance class

P0 (omitted) - tolerance levels comply with JIS standards for level 0.

P6 - tolerance levels comply with JIS standards for level 6.

P6X - tolerance levels comply with JIS standards for the 6X level.

P5 - tolerance levels comply with JIS standards for Grade 5.

P4 - tolerance levels comply with JIS standards for level 4.

P2 - tolerance levels comply with JIS standards for level 2.

NSK Bearings special specifications

X26 - temperature limited to 150 degrees Celsius.

X28 - use temperature limit of 200 degrees Celsius.

X29 - temperature limited to 250 degrees Celsius.

S11 - aligning roller bearings, using the temperature limit of 200 degrees Celsius

NSK bearing ring shape

K - tapered bore, taper 1:12.

K30 - tapered bore, taper 1:30.

E - Ring on incision or hole.

E4 - the outer ring with a fuel tank, oil hole.

N - outer diameter with a groove.

NR - outer diameter with a groove, snap ring.

NSK bearings and gaskets with

DB - million to help NSK bearings back to back pairs of electrical and mechanical installation.

DF - installed in pairs face to face.

DT - series installed in pairs.

+ K - outer ring with liner.

+ L - inner padded.

+ KL - inner and outer rings with a liner.

NSK bearing clearance

C1 - million to help up to the Electrical and Mechanical NSK Bearings Radial bearings radial clearance, clearance smaller than C2.

C2 - to the heart of the radial bearing clearance, smaller than the standard clearance.

CN (omitted) - Standard Radial Bearing radial clearance.

C3 - Radial Bearing radial clearance, clearance than the standard major.

C4 - Radial Bearing radial clearance, clearance than C3 large.

C5 - Radial Bearing radial clearance, clearance than C4 large.

CC1 - cylindrical roller bearings (not interchangeable) radial clearance, smaller than the CC2 clearance.

CC2 - cylindrical roller bearings (not interchangeable) radial clearance, smaller than the standard clearance.

CC - cylindrical roller bearings (not interchangeable) standard radial clearance.

CC3 - cylindrical roller bearings (not interchangeable) radial clearance, clearance than the standard major.

CC4 - cylindrical roller bearings (not interchangeable) radial clearance, clearance than CC3 large.

CC5 - cylindrical roller bearings (not interchangeable) radial clearance, clearance than CC4 large.

MC1 - small, miniature ball bearing radial clearance, clearance smaller than MC2.

MC2 - small, miniature ball bearing radial clearance, clearance smaller than MC3.

MC3 - small, miniature ball bearing radial clearance standards for clearance.

MC4 - small, miniature ball bearing radial clearance, clearance than MC3 large.

MC5 - small, miniature ball bearing radial clearance, clearance than the MC4 large.

MC6 - small, miniature ball bearing radial clearance, clearance than the MC5 large.

CM - motor with deep groove ball bearings, cylindrical roller bearing radial clearance.

CT - Motor cylindrical roller bearings with radial clearance

NSK Bearing Cage

M - copper alloy solid cage.

T - synthetic resin cage.

W - stamping cage.

V - no cage.

NSK bearing seals, dust cover

Z, ZS - side with steel dust cover.

ZZ, ZZS - both sides with steel dust cover.

D, DU - side with a contact rubber seals.

DD, DDU - both sides with contact rubber seals.

V - side with a non-contact rubber seals.

VV - sides with a non-contact rubber seals.

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