Sintered bronze/Oil bronze bushing
The sintered bronze bushing/Oil bronze bushing is a self lubricating sliding bearing. The bearing is impregnated with 20 -30 percent-volume high-class oil, which form an oil film between the sliding bearing and the shaft. It is common to say that sintered bronze bushings/Oil bronze bushings is a good choice at low loads and high rpm.
Standard radial: SMS777 / SS2991 / (ISO2795)
Standard flange: SMS779 / SS2992 / (ISO2795)
At post processing, diamond or cemented carbide ISO quality K20 with a tip radius of max 0,1-0,2 mm must be used. Suitable cutting velocity is 100-200m/min. At post processing, the sliding bearing must be additionally lubricated.
If it can be suspected that the bearings have lost oil, new oil may be added by dipping the bearings in hot oil (80°C) and letting them cool in the oil. Additive lubrication is not normally necessary. However, in extreme operating conditions, it can be advantageous and then a thin oil should be used with the same viscosity as the original oil above. The oil should not contain solid additives, as these can clog the pores in the bearing surface.
Material: SINT-A51, Leg 630, SS 148321
Oil Bronze Cu 89.5, Sn 9.3, C 1.2. Oil content 29% vol%
Oil and min/max temperatur
As standard according to ISO VG 68
Minimum working temperature –12°C
Maximum working temperature +90°C
Kinematic viscosity 20–35 cSt
|Shaft||h8 – h9|
|Recommended shaft material, surface finish||Rz 1,2 – 0,8|
|Sanded, polished, hardness HB||150|
|Max static load||50 n/mm²|
|Max sliding velocity||5 m/sek|
|Temperature range||-12°C – +90°C|
|Request a diagram for calculation of load/rpm|
|Material analysis||CU 89,5%|