... , Steel plat(NA, TAF, TAF=NK) KT182216 Needle Roller Cages for General Usage :Two types:1, Metal stamping(TLA, TA, TLA=HK ... /T5801.Mutual difference of needle roller diameter is 2μ M, and the precision grade is G2 (ISO GB309).The diameter ... TN) and sealing-element material, operating temperature is -300C---+1000C.For general-disposition design of bearings, refer to the relevant recommendation in ...