(2) As for the numerical value related to IT, please refer to the related standards.
Remark: The table is suitable for steel solid shaft.
The recommended fit between bearing and housing hole
Note: 1. The table is suitable for
Basic code
The basic code is the dimension series code composed of dimension series code and the subsequent inner diameter code
Inner diameter code
d (mm)<10 The code directly indicates the diameter dimension. Sometimes, it use slash "/" and other code
=1 0 Inner diameter code 00
=1 2 Inner diameter code 01
=1 5 Inner diameter code 02
=1 7 Inner diameter code 03
17~500 Inner diameter multiplied by 5 is equal to the bearing diameter
≥500 The coder directly indicates the inner diameter and separated with a slash "/"
The front code and postposition code of deep groove ball bearings
Front code
S Stainless steel bearings
F Metric bearings with flanged outer ring (d ≤ 10mm)
MF Non-standard metric with flanged outer ring
R Inch (d ≤ 10mm)
MR Non-standard metric (d ≤ 10mm)
Postposition code
A Internal improved design, it is standard design without mark.
K Tapered bore bearings, taper 1:12
-RS Bearing with frame-type rubber seals on one side (Contact type)
-2RS Bearing with frame-type rubber seals on both sides (Contact type)
-RZ Bearing with frame-type rubber seals on one side (Non-contact type)
-2RZ Bearing with frame-type rubber seals on both sides (Non-contact type)
-Z Bearing with a shield on one side
-2Z Bearing with shields on both sides
R Bearing with snap rib (flanged outer ring) (d>10)
-ZN Bearing with a shield on one side, the outer ring has snap groove on the other side
-ZNR Bearing with a shield on one side, the outer ring has snap groove with snap ring on the other side
N Bearing outer ring with snap groove
NR Bearing outer ring has snap groove with snap ring
T Phenolic cloth laminated tube solid cage
TA Phenolic cloth laminated tube solid cage, guided by outer ring
TB Phenolic cloth laminated tube solid cage, guided by inner ring
TN Engineering plastic molding cage, to present different materials with additional number
Y Copper plate pressed cage, differs with additional number when material changes
J Steel plate pressed cage
M Brass solid cage, guided by steel ball
MA Brass solid cage, guided by outer ring
Brass solid cage, inner ring guide
/S0 The working temperature of bearing ring will achieve 150℃ through high temperature tempering treatment
/S1 The working temperature of bearing ring will achieve 200 ℃ through high temperature tempering treatment
/S2 The working temperature of bearing ring will achieve 250 ℃ through high temperature tempering treatment
/S3 The working temperature of bearing ring will achieve 300 ℃ through high temperature tempering treatment
/S4 The working temperature of bearing ring will achieve 350 ℃ through high temperature tempering treatment
/P0 Tolerance class compliant with stand 0 class
/P6 Tolerance class compliant with stand 6 class
/P5 Tolerance class compliant with stand 5 class
/P4 Tolerance class compliant with stand 4 class
/P2 Tolerance class compliant with stand 0 class
/CN 0 group clearance, /CN combined with letter H, M or L, representing the clearance range is halved
CNH 0 group clearance is halved, in the upper half
/CNM 0 group clearance is halved, in the mediate half
/CNM 0 group clearance is halved, in the lower half
/C2 Clearance compliant with 2 class
/C3 Clearance compliant with 3 class
/C4 Clearance compliant with 4 class
/C5 Clearance compliant with 5 class
/C9 Clearance compliant with 9 class
/P53 Represent bearing tolerance P5 class, radial clearance 3 group
/P62 Represent bearing tolerance P6, radial clearance 2 group
/P63 Represent bearing tolerance P6, radial clearance 3 group
/HT Bearing filled with high temperature grease
/LT Bearing filled with low temperature grease
/MT Bearing filled with special medium temperature grease
/LHT Bearing with special high, low temperature grease
/VB Special assembly chamfer