S45C Tempered Special-Shaped Swing Arm | Heavy-Duty Connecting Link for Automation Equipment

This irregular swing arm is integrally machined from solid S45C carbon steel plate, serving as the core transmission link for heavy-duty reciprocating automation, robot transfer modules and stamping conveyor lines. The one-piece gantry milled structure features a large hinge bore plus multiple mounting holes. The waisted profile reduces stress concentration. After tempering heat treatment and precision boring, the link maintains high rigidity and positioning accuracy without fracture under high-frequency cyclic swing.

Core Specs

Application Industry: Custom automation transfer machinery, robot transmission, stamping production lines, heavy fixture reciprocating modules

Machining Process: S45C steel blanking → tempering heat treatment → gantry CNC milling for special contour → precision boring + drilling & tapping → deburr & edge rounding → black oxide anti-rust finish

Tolerance Standard: Hole center distance ±0.02mm; hinge bore H7 tolerance; hole position ≤0.03mm; flatness 0.05mm per meter

Heat Treatment: S45C tempered to HB220~260 for improved toughness and anti-fatigue performance

Production Equipment: Gantry machining center, CNC boring mill, heat treatment furnace, tapping center

Optional Post-processing: Tempering & quenching, deburr & chamfer, black oxide, phosphating, polishing

Lead Time: Sample order 4~5 working days, bulk order 7~12 working days

Advantages

✅ One-piece solid steel plate ensures high integral rigidity, resisting bending deformation under heavy alternating load

✅ Waist stepped profile eliminates stress concentration, avoiding breakage after millions of reciprocating cycles

✅ Large hinge hole + multi-hole layout distributes force evenly, ensuring backlash-free stable transmission

✅ Tempered S45C balances toughness and strength, doubling service life compared with ordinary carbon steel

✅ Multiple mounting holes allow flexible assembly with cylinders and pins for various transfer mechanisms

Tempered S45C swing arm with stress-relief shape; precision bore guarantees stable transmission without deformation for heavy reciprocating motion.

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Cooperation Invitation

We provide custom service for all irregular connecting rods and swing arms based on your drawings. We complete the whole process including heat treatment, precision boring and contour milling with our in-house gantry machines and heat treatment workshop. Stable precision and on-time delivery guaranteed. Automation manufacturers, overseas buyers and mechanical engineers are welcome to send drawings for free quotation and technical solution.