Ložiskové jednotky NTN-SNR

Xoxoxo SNR Ball Bearing Units SNR Ball Bearing Units SNR Industry 24 Operating temperature Bearing clearance Standard ball bearing inserts are suitable for all applications in the temperature range of –20 °C to +100 °C. SNR high temperature inserts were specially designed for applications with operating temperatures above the range mentioned previously. They have a steel plate cage like standard inserts. However, they are equipped with a high temperature grease and can be used up to + 200 °C. The suffix for these inserts is “T20” and is added to the bearing designation on orders , e.g., “UCP206T20”. For applications below the normal temperature range (down to –40 °C), we supply bearing inserts with the designation “T04”. They also have a steel plate cage but are filled with a low temperature grease. On orders, the designation is also added to the end, e.g., “UCP206T04”. For further specifications about the lubricants used, refer to the section “Lubrication and maintenance” starting on page 34. Standard ball bearing inserts are manufactured with an increased bearing clearance of group C3. Inserts for high or low temperature applications have C4 bearing clearance. The bearing clearance values can be found in the following tables: Bore Radial bearing clearance nominal size [µm] [mm] normal C3 C4 above up to min. max. min. max. min. max. 10 18 3 18 11 25 18 33 18 24 5 20 13 28 20 36 24 30 5 20 13 28 23 41 30 40 6 20 15 33 28 46 40 50 6 23 18 36 30 51 50 65 8 28 23 43 38 61 65 80 10 30 25 51 46 71 80 100 12 36 30 58 53 84 100 120 15 41 36 66 61 97 120 140 18 48 41 81 71 114 Inserts with cylindrical bore Inserts with tapered bore Bore Radial bearing clearance nominal size [µm] [mm] normal C3 C4 above up to min. max. min. max. min. max. 24 30 13 28 23 41 32 50 30 40 15 33 28 46 39 60 40 50 18 36 30 51 43 68 50 65 23 43 38 61 54 84 65 80 25 51 46 71 64 99 80 100 30 58 53 84 74 114 100 120 36 66 61 97 89 134 120 140 41 81 71 114 109 159