About Precision Tubes
Cold-drawn precision tubes for hydraulic systems, automotive components, pneumatic cylinders, and high-tolerance fabrication work. Manufactured to DIN 2391 (ST45, ST52) and EN 10305 standards with tight dimensional tolerances.
Use this page as a product and specification reference. The exact material grade, dimensions, manufacturer, certification, inspection scope, quantity, price, availability, freight, and delivery timing are confirmed for the specific RFQ.
Specification reference
| Outer Diameter (OD) | 6mm to 150mm |
|---|---|
| Wall Thickness (WT) | 1mm to 15mm |
| Grades | DIN 2391 / EN 10305: ST35, ST45, ST52 |
| Lengths | Random lengths (4m-7m) or exact cut-to-length |
| Delivery Condition | BK (Cold Finished), BKW, BKS, GBK, NBK |
Confirm the exact grade, dimensions, tolerance, test certificate, and current availability for your requirement before ordering.
Common applications
- Hydraulics & Pneumatics: Cylinder barrels and fluid lines.
- Automotive: Shock absorbers, steering columns, and axles.
- Heavy Machinery: Earthmoving equipment arms and actuators.
- Bicycles & Two-Wheelers: Frame fabrication and front forks.
Source mills we work with
We procure from established Indian and global mills selected for the required grade, test certificate, and delivery schedule.
- TI Machining
- ISMT Limited
- Heavy Metal & Tubes
- Mahalaxmi Seamless
Applicable standards and specifications
What to include in the RFQ
- Specify the relevant standard or grade where known.
- Provide OD or NB, wall thickness or schedule, required length, and quantity.
- State the delivery city or PIN code and any unloading constraints.
- List MTC, IBR, TPI, marking, inspection, or other documentation requirements.
Frequently asked questions
What is the difference between CDW and CDS precision tubes?
CDW (Cold Drawn Welded) starts as an ERW pipe that is cold drawn over a mandrel to improve tolerances and strength. CDS (Cold Drawn Seamless) starts as a seamless billet, offering higher pressure ratings and no weld seam.
Can these tubes be used directly as hydraulic cylinders?
Standard precision tubes require honing or skiving to achieve the mirror-like internal finish necessary for hydraulic seals. We can supply pre-honed (ready-to-use) tubes upon request.
What do delivery conditions like BK or NBK mean?
These indicate the final heat treatment. BK means cold finished (hard), offering max strength but low ductility. NBK means normalized, which relieves stress and improves ductility for bending.
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