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Double Head Stud Bolt Stainless Steel Piston Rod Hydraulic Cylinder Rod Solid Forged Piston and Rod


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Screw Thread d:
M5, M6, M7, M8, M10, M12

Specifications

Diameter Range: Ø12 mm – Ø300 mm (standard); up to Ø500 mm on request
Length: 0.3 m – 6 m random length; cut-to-length service available
Steel Grades:

C45 / 1045 carbon steel (induction hardened)
42CrMo / 4140 alloy steel for high-torque cylinders
AISI 304 / 316L stainless for marine or food-grade duties

Straightness: ≤ 0.15 mm / 1000 mm; ≤ 0.3 mm full length
Surface Finish: Ra 0.2 µm max after chrome plating
Chrome Layer: 20 – 50 µm (standard), 100 µm+ for offshore; micro-cracked or porous-free options
Hardness after Hardening: HRC 45 – 55 (induction), HRC 60 – 65 (chrome)
Tolerance: f7 / h6 on diameter, ISO 286-2; custom h5 or g6 on request
Chamfer: 0.5 × 45° both ends or customer-defined radius

Features

High Strength & Fatigue Resistance: Induction-hardened case (2 – 5 mm depth) handles shock loads up to 700 bar
Mirror-like Polish: Precision ground and polished before plating to reduce seal wear and extend packing life .
Superior Corrosion Protection: Nickel-chrome or Geomet® 500 systems pass 500 h neutral salt-spray; stainless option gives 1000 h+ .
Dimensional Stability: Straightening + stress-relief at 180 °C guarantees < 0.05 mm bow after long strokes.
Custom End Configurations: Internal / external threads (UNF, metric, Acme), wrench flats, cross-holes, keyways or spherical ends supplied complete.
Eco & Safety: Full RoHS & REACH compliance; no hex-chrome plating on stainless series.
Traceability: Laser-marked heat number & certificate (EN 10204 3.1) for every rod

Applications

A. Construction & Mining

Excavator boom, dump-truck hoist and tunnel-boring cylinders demand heavy-wall rods (Ø80 – Ø220 mm) with 700 bar yield and impact resistance .

B. Agriculture & Forestry

Tractor loader, harvester and log-splitter cylinders require Ø25 – Ø70 mm rods with induction-hardened layer to resist stone-impact and contamination.

C. Material Handling & Logistics

Fork-lift mast and scissor-lift cylinders use Ø20 – Ø60 mm high-frequency-hardened rods for fatigue life > 500 000 strokes at 250 bar.

D. Automotive & Transportation

Tipper, refuse-truck and car-transporter hydraulics call for Ø40 – Ø120 mm rods with chrome thickness ≥ 30 µm to pass 1000 h salt-spray on winter roads

E. Machine Tools & Presses

Precision grinding machines and C-frame presses need h5 tolerance stainless rods (Ø12 – Ø50 mm) for low stick-slip and high positional repeatability.

F. Marine & Offshore

Ship steering, deck crane and sub-sea actuator rods in 316L or duplex steel survive salt-water splash and cathodic protection zones without pitting

G. Energy & Utilities

Wind-turbine pitch, hydro dam gate and solar tracker cylinders rely on long-length (4 – 6 m) chrome-plated rods with < 0.1 mm straightness to avoid buckling under 400 bar peak pressure.

FAQ

Q: What are the available thread standards for your Double Head Stud Bolt?

A: We offer stud bolts in various thread standards, including metric (ISO) and imperial (UNC, UNF). You can specify the thread standard you need when placing an order, and we will ensure that the stud bolts meet your requirements.

Q: Can you provide custom - made Double Head Stud Bolts?

A: Yes, we can provide custom - made stud bolts. If you have specific requirements regarding the diameter, length, thread pitch, or material, our engineering team can work with you to develop a customized solution.

Q: How do I ensure the proper installation of your Double Head Stud Bolt?

A: Proper installation is crucial for the performance of the stud bolt. We recommend using the correct torque values when tightening the nuts. You can refer to our installation guidelines or consult our technical support team for detailed information on the installation process.