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cise parts with high accuracy and high rotation. ? 轉(zhuǎn)速 rotation rate 轉(zhuǎn)速高 High ratation rate → 旋轉(zhuǎn)軸或孔的跳動 The runout of rotation axis or hole 振動和噪音 Vibration and noise 選用精度高的軸承 Select and use the bearings with high precision accuracies 公差等級 Tolerance classes 應(yīng)用范圍 Applied ranges 0 通常稱為普通級,應(yīng)用最廣, 用于對旋轉(zhuǎn)精度運轉(zhuǎn)平穩(wěn)性要求不高的一般旋轉(zhuǎn)機(jī)構(gòu)中 。 It is usually called universal class and most widely is used in mon rotary mechanisms of which rotation precision running stability requirements are not high 6 5 應(yīng)用在旋轉(zhuǎn)精度和運轉(zhuǎn)平穩(wěn)性要求較高或轉(zhuǎn)速較高的旋轉(zhuǎn)機(jī)構(gòu)中,其中 6級、 5級軸承多用于比較精密的機(jī)床和機(jī)器中。 They are usually used in the rotary mechanisms with higher requirements on rotation accuracy and operational stability or higher rotation and 6 classes bearings are chiefly used in higher accurate machine tools or machines. 4 2 4級軸承多用于轉(zhuǎn)速很高或旋轉(zhuǎn)精度要求很高的機(jī)床和機(jī)器的旋轉(zhuǎn)機(jī)構(gòu)中。 2級軸承應(yīng)用在精密機(jī)械的旋轉(zhuǎn)機(jī)構(gòu)中。 4 class bearings are chiefly used in the machine tools and machines’ rotating mechanisms with high rotation rates or high rotary precision requirements. 2 class bearings are applied in precision mechanisms’ rotating mechanisms. ⑴ 公差帶特點 :上偏差為 0,下偏差為負(fù)值 The features of tolerance zones:The upper deviation is 0 and lower deviation is negative value 0 6( 6x) 5 4 2 0 6( 6x) 5 4 2 + 0 + 0 D d 軸承外徑公差帶 The tolerance zones of bearing external diameters 軸承內(nèi)徑公差帶 The tolerance zones of bearing internal diameters ⑵ 滾動軸承配合制 : 與外圈相配合: 基軸制 與內(nèi)圈相配合: 基孔制 The fit systems of antifriction bearings:Fit with outer ring: Basic shaft system Fit with outer ring: Basic bore system 、外徑公差帶的特點 The features of internal and external diameters tolerances in antifriction bearings 公差等級 0 6 5 4 2 基本尺寸 /mm 極限偏差 /μ m 大于 到 上 偏 差 下 偏 差 上 偏 差 下 偏 差 上 偏 差 下 偏 差 上 偏 差 下 偏 差 上偏差 下 偏 差 內(nèi)圈 Δdm 18 30 0 - 10 0 - 8 0 - 6 0 - 5 0 - 30 50 0 - 12 0 - 10 0 - 8 0 - 6 0