The ambient temperature directly affects the selection of lubricating grease. Generally speaking, when the service temperature is lower than 60 ℃, the oxidation reaction of bearing is not obvious; However, when the temperature exceeds 60 ℃, the oxidation rate increases exponentially for every 10 ℃, and the service life of lubricating oil may be halved. In order to reduce the temperature of lubricating oil in lubricating parts or lubricating system, YTP linear bearing can consider adding cooler or heat sink to prolong the service life of lubricating oil. Then, what are the effects of environmental conditions on the installation accuracy of YTP linear bearing? Here are some points for your reference:

1、各種機械傷痕，諸如磨傷，劃傷、壓傷、碰傷等，都會造成軸承安裝不良，引起偏載和應力集中，造成旋轉精度和使用壽命的下降。

1. Various mechanical scars, such as abrasion, scratch, crush and collision, will cause poor bearing installation, eccentric load and stress concentration, and reduce the rotation accuracy and service life.

2、銹蝕、黑皮和麻點，后兩種是容易儲存水分和污物的缺陷，容易發展成銹蝕。而銹蝕則是導致安裝不良、早期磨損和疲勞的污染源，嚴重的銹蝕會使YTP軸承報廢。

2. Rust, black skin and pitting. The latter two are defects that are easy to store moisture and dirt, which are easy to develop into rust. Corrosion is the pollution source leading to poor installation, early wear and fatigue. Serious corrosion will scrap YTP bearings.

3、各種裂紋，諸如原材料裂紋，鍛造裂紋、熱處理裂紋和磨削裂紋等，這些裂紋在以后軸承的運轉過程中，將成為應力集中源而迅速擴大，造成軸承破裂，對進口軸承壽命和工作性影響極大。事實上，對于重要用途的YTP軸承，軸承廠已對其組成零件進行100％磁力或射線探傷檢查。

3. Various cracks, such as raw material cracks, forging cracks, heat treatment cracks and grinding cracks, will become a source of stress concentration and expand rapidly in the later operation of the bearing, resulting in bearing fracture, which has a great impact on the service life and workability of the imported bearing. In fact, for YTP bearings with important applications, the bearing factory has conducted 100% magnetic or radiographic inspection on its components.

4、起皮和折疊，這兩種缺陷的局部與基體金屬結合不牢，而且其周圍往往不同程度地存在著脫碳或貧碳現象，材料容易崩落、壓凹或磨耗，對軸承壽命和精度很不利。

4. Peeling and folding, the local combination of these two defects with the base metal is not firm, and decarburization or carbon deficiency often exist around them to varying degrees. The material is easy to collapse, dent or wear, which is very unfavorable to the service life and accuracy of the bearing.

固定端前YTP軸承在軸上的安裝：將軸承用潔凈的清洗煤油進行徹底清洗，對于脂潤滑，先將含有3％～5％潤滑脂的有機溶劑注入軸承作脫脂清洗后，再用油槍將定量的潤滑脂填入軸承內；加熱軸承使升溫20～30℃，用油壓機將進口軸承裝入軸端；將緊定套壓在軸上并以合適的壓力抵住YTP軸承端面使其軸向定位；將彈簧秤的帶子卷在軸承外圈上，用測量啟動力矩的方法校驗所規定的預負荷是否有大幅度的變動。

Installation of YTP bearing on the shaft before the fixed end: thoroughly clean the bearing with clean cleaning kerosene. For grease lubrication, first inject organic solvent containing 3% ~ 5% grease into the bearing for degreasing and cleaning, and then fill a certain amount of grease into the bearing with an oil gun; Heat the bearing to raise the temperature by 20 ~ 30 ℃, and install the inlet bearing into the shaft end with an oil press; Press the set sleeve on the shaft and press the YTP bearing end face with appropriate pressure to make it axially positioned; Roll the belt of the spring scale on the outer ring of the bearing, and check whether the specified preload changes greatly by measuring the starting torque.