zielsicher Englisch, Metalltechnik, Schulbuch

Match the terms with their definitions. thrust bearings radial bearings supporting and inclined bearings power transmitted in transverse direction power transmitted in both directions power transmitted in longitudinal direction Read the following text and learn more about bearings. Plain bearings: The power transmission takes place from the shaft to the sliding bearing shell, into the transmission box. A sliding friction develops. Plain bearings are constructed quite simply. Parted bearings are easier to install. Lubrication is very important for the motion quality – plain bearings achieve an almost unlim- ited durability, even at high rotational speeds. The large sliding surface of a plain bearing has a vibration-reducing and silencing effect. Therefore, plain bearings run more quietly than rolling bearings and are more resistant to knocks and bumps. Rolling bearings: The rollers of the rolling bearing between the bearing shells transmit the power; rolling friction devlops; which is less than the sliding friction: Rolling bearings are quite sensitive to knocks and bumps. Depending on the lubrication, the rotational speed also is limited. Answer the following questions. 1. Which bearings are more resistant to knocks and bumps? Plain bearings are more resistant to knocks and bumps. 2. Why is lubrication important? It is important for the motion quality and durability of the bearing. 3. Name the two types of friction. Sliding friction and rolling friction. Mosaic There are two pieces of sports equipment, where bearings are absolutely necessary! Try to find out what they are, using the following letters: A A A B D E E E K K L L O O R R R S S S T T Do they have plain bearings or rolling bearings? R O L L E R S K A T E S S K A T E B O A R D 03 A2 04 A2–B1 Word bank bearing shell Lagerschale sliding friction Gleitreibung slide bearing shells Gleitlagerschalen rollers of the rolling bearing Wälzkörper rolling friction Rollreibung rotational speed Drehzahl transmission box Getriebegehäuse rolling bearings 141 Plain bearings and rolling bearings 27 Nur zu Prüfzwecken – Eigentum des Verlags öbv