Bearing Steel Tube Material GCr15 100Cr6,SKF3,SKF3S Seamless Steel
Tube
Material: GCr15 100Cr6,SKF3,SKF3S
Diameter range:10-160mm
Thickness Range:1-25mm
1. Introduction
Bearing steel pipe is the seamless steel tube for hot rolling or
cold rolling (cold drawing) for the manufacture of ordinary rolling
bearing ring. The outer diameter of the steel tube is 25-180 mm,
and the wall thickness is 3.5-20mm, which is divided into ordinary
precision and high precision. Bearing steel is used for making ball
bearings, roller bearings and bearing rings. Bearing is under great
pressure and friction, so the bearing steel is required to have
high and uniform hardness and wear resistance, and high elastic
limit. On the uniformity of the chemical composition of bearing
steel, the content and distribution of non-metallic inclusions are
very demanding, the distribution of the carbide, etc, are all steel
production in one of the most demanding steel grade.
2. Delivery Condition
1) +C No heat treatment after the final cold drawig process
2) +LC After the final heat treatment there is a suitable drawing
pass
3) +SR After the final cold drawing process there is a stress
relieve heat treatment in a controlled atmosphere
4) +A After the final cold drawing process the tubes are annealed in a
controlled atmosphere
5) +N After the final cold drawing operation the tubes are
normalized in a controlled atmosphere
3. Application
In addition to ball bearings, bearing rings, sometimes used to make
tools, such as punch, measuring tools.
4. Main Equipments List and Capacity Analysis
| Status | Main Equipment List | Quantity (Line) | Capa per Shift | Shift per Day | Working days per month | Actual Capacity |
| Current | Piercing Mill ∮50-∮120 | 5 | 25T/S | 2 Shifts | 22 Days | 66000T/Y |
| Rolling Mill ∮40-∮180 | 50 | 1.25T/S | 2 Shifts | 22 Days | 33000T/Y |
| 60T 3 Lines of High Precision Drawing Machine | 1 | 15T/S | 2 Shifts | 22 Days | 7920T/Y |
| Drawing Machine 10T-150T | 10 | 3.5T/S | 2 Shifts | 22 Days | 18480T/Y |
| Straightening Machine ∮30-∮130 | 7 | 16.5T/S | 2 Shifts | 22 Days | 60984T/Y |
| Heating Furnace | 4 | 26T/S | 2 Shifts | 22 Days | 54900T/Y |
| Eddy Current Detector | 3 | 33T/S | 2 Shifts | 22 Days | 52272T/Y |
| Ultrasonic Detector | 1 | 10T/S | 2 Shifts | 22 Days | 5280T/Y |
| Ultrasonic & Eddy Current Detector | 1 | 25T/S | 2 Shifts | 22 Days | 13200T/Y |
| Automatic Pickling Equipment | 1 | 115T/S | 2 Shifts | 22 Days | 60720T/Y |
| 60 Welding Line | 1 | 25T/S | 2 Shifts | 22 Days | 13200T/Y |
| Head Shrinked Machine | 1 | 25T/S | 2 Shifts | 22 Days | 13200T/Y |
| 85m Roller Hearth Bright Normalizing(Annealing) Furance | 1 | 48T/D | 2 Shifts | 22 Days | 12672T/Y |
Subtotal
| | | | | 59400T/Y |
Project in progress
| SG/76 Strengthen Precision High Frequency Welding Line | 1 | 65T/D | 2 Shifts | 22 Days | 17160T/Y |
| 14 Roller Precision Straightening Machine | 2 | 25T/S | 2 Shifts | 22 Days | 13200T/Y |
| 60T 3 Lines of High Precision Drawing Machine | 1 | 30T/D | 2 Shifts | 22 Days | 7920T/Y |
5. Picture
