What happens to a bar
between the mill and you
Most suppliers sell you the last stage. We run all four at Bilaspur, so the finish is controlled rather than chased.
Hot rolled bar
Steel arrives from the mill with a rough, scaled skin. The diameter varies, it is not perfectly straight, and the outer layer has lost carbon — a soft layer that has to come off first.
Straightness: uneven
Tolerance: loose
Peeled bar
Fixed tools cut the skin away in a single pass while the bar rotates, leaving a clean, concentric, defect-free surface with good dimensional accuracy.
Grades: C45 · EN8-D · EN19 · EN31
Ground bar
An abrasive wheel removes a little more material for tolerance, roundness and finish.
Tolerance: f7 · f8 · h8 · h9
Straightness: ~0.1 mm/m
Run out: 20 – 40 µm
Chrome plated & hardened
Where the job needs wear and corrosion resistance, the ground bar is chrome plated, induction hardened, or both.
Induction: up to 65 HRC, 2 – 5 mm deep
Three products,
one standard
We import honed tube for the hydraulic and engineering trade, and we manufacture peeled and ground bar ourselves. Both leave here checked against the same drawing you sent us.
Honed Tubes
A steel tube whose bore is polished to a smooth, round finish, so a piston seal runs against it without scoring or leaking. Used in hydraulic cylinders and construction equipment.
- Bore
- Ø40 – 400 mm
- Wall
- ≥ 5 mm
- Material
- E355 / ST-52
- Tolerance
- H8
Peeled Bars
Peeling removes the rough outer skin of a hot-rolled bar in one pass, leaving a clean, concentric, defect-free surface. The right choice when the bar gets machined afterwards.
- Diameter
- 20 – 100 mm
- Length
- Up to 6000 mm
- Tolerances
- f7 · f8 · h8 · h9
- Grades
- C45 · EN8-D · EN19
Ground Bars
A peeled bar taken further on the centreless grinders for tighter tolerance and a finer finish. For cylinder rods, precision shafts and anywhere a seal rides on the bar itself.
- Roughness
- 0.1 – 0.4 Ra
- Straightness
- ~0.1 mm/m
- Chrome
- 20 – 200 µm
- Induction
- Up to 65 HRC