Tubes for bearing production

Features of precision steel tubes used in the production of bearings:

  • high dimensional precision (key feature);
  • high surface quality – the inner and outer surface of the pipes should be very smooth and without damage, which affects the tribological properties of the bearings (referring to friction forces);
  • high tensile and bending strength, which affects the durability and stability of the bearings;
  • high resistance to fatigue and cyclic loads, which is especially important in the case of bearings operating in dynamic conditions;
  • corrosion resistance to ensure long bearing life in harsh environmental conditions;
  • high quality of steel, which affects the mechanical properties and durability of bearings;
  • exact chemical parameters, such as carbon, chromium, manganese, phosphorus and sulfur content, which affect the properties of the steel.
Calculate the weight of pipes

Calculate the weight of pipes

Use our calculator to determine the exact weight of pipes you are interested in.
Dimensions of precision tubes for bearing production
Outside diameter [mm] Wall thickness [mm]
22-25 3-4,1
25,01-29 3-5
29,01-32 3-6,7
32,01-40 3-7,8
40,01-70 3-8

Tolerance of outside diameter

D50 mm : 0 +0,25 mm

Tolerance of wall thickness

± 7,5 % (po uzgodnieniu ± 5%)


3 000 ± 500 mm


1 mm / 1 000 mm, max 2,5 mm / 3 000 mm

Delivery condition (heat treatment)

GKZ + K + G – annealed for globular carbide + cold finished + soft annealed


After soft annealing is 174-220 HB. Dispersion of hardness along the tube length max. 15 HB. Hardness by quenching test is min. 61 HRC.

Surface condition

The tubes are delivered with surface after soft annealing. Max depth of defects is 0,25 mm including decarbonizing.

Tube ends

Plain square cut ends, one end bevelled 0,5-4 mm x 45°.


Testing according to DIN 17 230. NDT upon agreement according to EN 10246-3 E2H and EN 10246-7 U2/B and test of material identification of alloy steel.


Bundles are marked with label.

Surface protection



Tubes are packed in bundles (weight 1 000 – 3 000 kg).


according to DIN 50049 – EN 10204 – 3.1