Precision tubes for production of bearings use the cold drawing process. Rolled seamless tubes are used as the semi-finished product.
| OUTER DIAMETER (OD) | 22,0 – 70,0 mm |
| WALL THICKNESS (WT) | 3,0 – 8,0 mm |
| DIN 17 230 | 100Cr6 |
| STN 14 109 |
length 3 000 mm with tolerance +/- 500 mm.
Testing is done according to DIN 17 230.
| outside diameter D < 50 mm | 0 – +0.15 mm |
| outside diameter D > 50 mm | 0 – +0.25 mm |
| wall thickness | -/+ 7,5 % (after agreement 5 -/+ %) of the wall thickness |
Tubes have its ends smooth, plain square cut ends, one beveled 0,5 to 4,00 x 45°.
Tubes are packed in circular weighing between 1 000 – 3 000 kg.
Tubes bound with a steel band.
After the soft annealing the hardness ranges is 174 – 220 HB.
Hardness value dispersion along the length of the tube is 15 HB maximum.
Minimum hardness according to the hardness test is 61 HRc.
Residual magnetism 10 Oe maximum.
Testing procedures according to SEP 1520:
• carbide sizes 2.1 – 2.3,
• lamellar pearlite 3.0,
• carbide net 5.2,
• carbide line spacing (max 6.3 – continuous, max 7.3 – released).
Bundles of tubes are marked with label.
Tested according to DIN 50602..
Total value of oxide and sulphur micropurity K3 <= 10.
Surface of the tubes is oiled.
The tubes also may be delivered as hot rolled.
It is also possible to deliver bearing tubes according to STN EN ISO 683-17.
It is annealed and automated steel that it is destined for hot treatment, part 17: steel for roller bearings.
Are you interested in cooperation? Send us an inquiry, or order the goods directly from stock.
+421 48 6451111 | admin@zelpo.sk
