Not casting, so there is no gray iron, cast steel.
Machined bearing housings are generally made of carbon structural steel Q235A.
The bearings are made of cast iron, cast steel, stainless steel, and so on.1, cast iron bearing block economical, but not durable. --- such as HT150, HT200, etc. if the requirement is not high, 45# can also be used, the surface re oiling, or easy to rust corrosion, I personally want to use 40Cr, material is not expensive,2, cast steel bearing block durable, expensive. I don't know much about things like ZG230-450 and so on3, stainless steel bearing seat, more used for corrosion places, the price is expensive, - such as SUS304/, better SUS316,Specific analysis of specific circumstances, according to the function, the use of environment and cost considerationsThese are my personal understanding, for reference purposes only, I hope I can help you!
Casting of HT200 cast iron for bearing housings. Due to the bearing seat body to work under the screw axial force, to ensure the correct position of the driving shaft, so the bearing seat structure and manufacture of materials to support the drive shaft enough to generate huge axial force and bearing screw work intensity.Bearing seat machining should pay attention to:Assembly inner circle and cylinder flange of deep groove ball bearing and bearing seat with the center line of the circle diameter in portions of concentricity, to strictly control;The support surface of thrust ball bearing and the joint surface of cylinder flange and bearing seat should be strictly guaranteed when they are assembled with the center of a few inner holes. The guarantee of these two conditions is the important requirement for the rotation of the drive shaft and the screw in the cylinder.
