Looking For SKF Bearings

RFQ Description

Good evening, dear Alice. I am a manager in a factory producing tricone drill bits. We occupy 60% of the Russian market and sell our products to other countries as well. I would like to send an inquiry on cylindrical rollers for bearings. Just the rollers, without the cage and rings. The cylindrical rollers we need are going to be used in tricone drill making. The drill bits we produce are going to be used for mining metal ore, so the load on the bearings is going to be very strong. IMPORTANT : the steel used in automotive industry does not meet the requirements. HRC 56-59 These are our most used sizes 8 x 12 8 x 14 12,5 x 22 12,5 x 25 15 x 30 There are 14 types that we use in total. The amount we use for one month is 250 00 pieces. The most important thing is that shock-resistant steel is used . Very special. Regular alloys won't do. The steel for the rollers must be SAE-AISI S2 (T41902) Shock-Resisting Steel. You can see its properties here. https://www.makeitfrom.com/material-properties/SAE-AISI-S2-T41902-Shock-Resisting-Steel Element Weight % C 0.40-0.55 Mn 0.30-0.50 Si 0.90-1.20 Ni 0.30 Mo 0.30-0.60 V 0.50 Cu 0.25 P 0.03 S 0.03 This steel grade equals to russian 55SіMo5V C 0.53-0.6 S less 0.015 P less 0.025 Mn 0.3-0.6 Cr less 0.3 Si 0.8-1.1 Ni less 0.3 Fe remaining Cu less 0.25 V 0.15-0.25 Mo 0.4-0.6 Please let us know if you make this kind of rollers.