针聘大会针记K20*26*17

NEEDLE RETAINER ASSEMBLYNeedle retainer assembly is a kind of independent bearing unit with high load capacity and rigidity especially applicable for the tray of shaft and seat holes with the unit which is limited in radical dimension.Each needle have excellent operative characteristic due to each needle exactly guided and kept by the retainer Structure KNeedle retainer assemblyK...ZW Double row needle retainer assemblyNeedle retainer assembly is divided into two series : single row and double row. In the case of crank shaft where difficulty of using and mounting occur , We will supply the divided structure. In general case, M type punched retainer is used, besides, there are metal solid retainer, fiber glass reinforced nylon 66 retainer. The latter can work under the temperature of 120°C for a long period while it can even operate under 150°C for short time. Precision The dimensional tolerances ofDEBU needle retainer are listed in Table 1 . When bearings of more than two types are used in parallel on a same shaft , the needles must belong to the sub group with same value. The retainer width tolerance Bc is -0.2/-0.55mm.Table 1 needle diameter tolerance Precision grade Needle diameter tolerance G2 0 -2-2 -4-4 -6G3 0 -3-3 -6-6 -9Combination The radical gap of needle retainer assembly depends on the machined precision of the inner and outer traysand the needles. Table 2 shows the combination recommended as per the different operational conditions.TN=Plastic,permissble operating temperature:they will operate well at temperature up to 120°C over extended period,Limiting speed for grease lubrication 60% of the given values are permissible.For special requirements,please contact RTL sales office for availability.