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Technical data for Stainless steel bearings
各个国家不锈钢商标对比表:
Nation China u.s.a Germany Japan France 范例
DIN W-Nr
Bearings steel NO. 9Cr18 AISI440B X90CrMoV18 1.4112 SUS440 Z105CrMo17 马氏体
9Cr18Mo AISI440C X105CrMo17 1.4125 SUS440C Z105CrMo17
0Cr18Ni9 AISI304 X5CrNi18-10 1.4301 SUS304 Z7CN18-09 奥氏体
0Cr17Ni12Mo2 AISI316 X5CrNiMo17-12-2 1.4401 SUS316 Z7CND18-12-03

Features of Insert Ball Bearing Units :_澳门金沙场4136
Rational self-alignment
       The outside diameter of the self-contained bearing is ground spherical to match corresponding spherical inside diameter of the housing providing self-alignment between these two members, which compensates for misalignments of the units resulting from errors in mounting and distortion of the foundation.
Large load carrying capacity
       Being the same as 6200 and 6300 series single row deep groove ball bearings in internal construction of the self-contained bearing. IB Insert Ball Bearing Units can sustain radial loads and substantial thrust loads as well. Quiet operation is also assured.
Longer service life
       Insert Ball Bearing Units are often used in severe operating conditions where they are exposed to dirt, moisture or high temperature, and in such applications, the grease inside the set-contained bearing deteriorates in a short period of time. It is required, therefore to re-lubricate the units at suitable intervals so as to replace deteriorated grease with fresh grease. IB Insert ball bearing units with iron housing are all re-lubricable types equipped with grease fittings to secure full performance and longer service life of the units under any operating condition.
Efficient sealing
       The self-contained bearing is double sealed with a combination of heat-resistant oil-proof synthetic rubber seal and steel slinger. The outside steel slinger which is to the inner ring and rotates together with effectively prevents foreign matters from entering into the bearing from the atmosphere and protects the bearing against outside pressure. The combination of these two sealingelements serve to exclude dirt and moisture and to retain the grease within the bearing chamber insuring full performance of the bearing even in severe operating conditions.
Solid housing
      The Stainless steel housing is of solid one-piece construction to provide maximum rigidity against deformation at mounting and wear resistance for any operating condition.
Easy and positive locking to shaft
        There are three methods of locking bearing units to the shaft. Locking by means of two set-screws in the extended inner ring is the most common method. Adapter sleeve locking and an eccentric locking collar are also available. All these locking methods offer easy installation of the units and machining of the shaft.
Special heat-treatment on inner ring
       AS shown in the figure left, the inner ring of the self-contained bearing is hardened in the race-way and surrounding part where hardening is necessary, while the extended part where the set-screws are installed is left metallurgical mild and tenacious. This special heat-treatment ensures full bearing performance and prevents the setscrews from loosening during operation as the setscrews can be tightened hard enough without causing inner ring cracking.
Unique device to prevent outer ring from rotating
       The bearing outer ring is equipped with a unique locking-pin(or ball) device which permits free self-alignment of the units, and also prevent outer ring from rotating. As a result, longer service life can be reached.
Complete interchangeability between bearing and housing
        Skilled precision workmanship on the self-contained bearing and the housing provides for complete interchangeability between them and the bearing can be easily replaced whenever so required.
Easy installation
    The self-contained bearing is prelubricated with adequate quantity of high quality grease. Bearing units can be mounted on the shaft for immediate operation. The units are, therefore, free from ingress of harmful contaminants into the bearing chamber during mounting procedures

不锈钢选用需求思索的身分: 
      正在侵蚀情况中挑选不锈钢时,除应对不锈钢的详细运用前提有具体的相识中,借需求思索的主要因素有:不锈钢的耐蚀性,强度,韧性和物理性能,加工,成形机能,资本,价钱和获得的难易.
耐蚀机能
      耐蚀性包孕不锈性和耐酸,碱,盐等侵蚀介质的机能和高温下抗氧化,硫化,氯化,氟化等的机能.因为选用差别不锈钢重要是为了处理现实工程中所碰到的种种侵蚀题目,为此正在侵蚀情况中不锈钢的耐蚀性怎样是选材职员起首需求思索的.侵蚀是金属取介质间因为化学或电化学感化而引发的损坏,而耐蚀性指不锈钢反抗介质侵蚀损坏的才能,故当选材中触及耐蚀性时,需求注重以下几点.
      ■耐蚀性的尺度是工资肯定的,既要认可它,运用它,又不克不及受它的束缚,要凭据详细运用要求去肯定是不是耐蚀的详细尺度.
现在对不锈钢的耐蚀性多接纳10级尺度,挑选哪一级做为耐侵蚀的要求,要思索装备,部个的特性(薄厚,巨细).使用寿命是非,产品质量(如杂质,色彩,纯度)等的要求,一般说来,对运用历程中要求光亮镜里或尺寸周详的装备仪表和部件,可选择1~3级尺度;对要求亲切合营,临时不漏或要求运用限少的装备,部件选2~5级,对要求不下检验轻易或要求寿命不很少的装备,部件则可选用4~7级,除特别破例,不锈钢正在运用前提下年侵蚀率凌驾1mm者一样平常多不选用,需求指出,10级尺度关于发生部分侵蚀时是不实用的.
      ■耐蚀性是相对的,有条件的,常说的不锈钢的不锈性,耐蚀性系指指相对生锈和不耐蚀而言,是指正在肯定条件下(介质,浓度,温度,杂质,压力,流速等一准时).停止现在为止,还没有在任何侵蚀情况中均具有不锈性,耐蚀性的不锈钢,因而选项材职员心须针对详细运用前提加以挑选,不锈钢商标选定后,运用部门还要针对所选用的不锈钢的特性准确运用,即公道选材加准确运用才气到达具有不锈性或耐侵蚀的目标.
      ■ 挑选不锈钢既要思索其耐一样平常侵蚀的机能,又要思索其耐部分侵蚀的机能,正在一些火介质和化工介质中,后者更需予以注重,那是由于,选材职员一样平常多重视不锈钢的耐一样平常侵蚀机能,而正在运用条件下,它们对部分侵蚀,比方对应力侵蚀孔蚀等的敏感性怎样则思索较少;不锈钢的部分侵蚀多正在耐一样平常侵蚀机能很好的侵蚀情况中发作,部分侵蚀经常致使不锈钢装备,部件的忽然损坏,其危害性远远大于一样平常侵蚀.
      ■正在运用种种手册中有关不锈钢的耐蚀性数据时,要注重个中许多数据只是一些实行内的实验效果,取现实介质情况常常有较大的收支,为了得到越发靠近现实运用前提的耐蚀性数据,一样平常应正在实行室内停止了现实介质的侵蚀实验或现场条件下的挂片实验需要时还要停止模仿装配的实验.
正在一些运用条件下,借会碰到这种情况,当事情介质中或所消费的工业产品中,纵然含有微量的某种或某此不锈钢中的金属离子时,便会影响化工工艺历程工工业产品的质量(包孕光芒,色彩,纯度等).这种情况正在核燃料制药和颜料等产业中最为常见,此时经常选用不露某种元素的不锈钢或恰当进步所选用不锈钢耐蚀性层次,以便使金属离子低落到许可的限度.
      ■不锈钢制装备,部件若果侵蚀而生效时,该当停止侵蚀损坏缘由的剖析,查明缘由后采取措施,而不应一扔了之.
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