Bearing and shaft fit tolerance standard
Bearing and shaft fit tolerance standard
①When the bearing inner diameter tolerance zone and the shaft tolerance zone form a fit, the tolerance code originally belonging to the transition fit in the general basic hole system will become an over-win fit, such as k5, k6, m5, m6, n6, etc., but the over-win amount is not Large; when the bearing inner diameter tolerance is matched with h5, h6, g5, g6, etc., it is not a clearance but an over-win fit.
②Because the tolerance value of the bearing outer diameter tolerance zone is different from that of the general reference shaft, it is also a special tolerance zone. In most cases, the outer ring is fixed in the housing hole, and some bearing components require adjustments due to their structural requirements. Too tight, often with H6, H7, J6, J7, Js6, Js7, etc.
Attachment: Under normal circumstances, the axis is generally marked with 0~+0.005. If it is not often disassembled, it is an interference fit of +0.005~+0.01. If you need to disassemble and assemble frequently, it is just a transition fit. We also need to consider the thermal expansion of the shaft material itself when it is rotating, so the larger the bearing, the best clearance fit is -0.005 to 0, and the maximum clearance fit should not exceed 0.01.
IKO Thompson Bearings Japan Thompson Co., Ltd. IKO is a professional bearing manufacturer with a history of more than 50 years, specializing in the production of needle roller bearings and linear guides. It enjoys a high reputation all over the world and is the history of needle roller bearings produced in Japan. The oldest manufacturer with the most complete variety and the highest level of specialization; the four-row cylindrical roller heavy-duty guide created by IKO Kafa is world-renowned. Its products are widely used in machine tools and other industries.
Bearing and shaft fit tolerance standard
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Bearing and shaft fit tolerance standard ①When the bearing inner diameter tolerance zone and the shaft tolerance zone form a fit, the tolerance code originally belonging to the transition fit in the general basic hole system will become an over-win fit, such as k5, k6, m5, m6, n6, etc., but the over-win amount is not Large; when the bearing inner diameter tolerance is matched with h5, h6, g5, g6, etc., it is not a clearance but an over-win fit.
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