SZGH B1850-3C-4 — 4-Axis 30 kg Stamping & Palletizing Robot

What Is the SZGH B1850-3C-4?

The SZGH B1850-3C-4 is a 4-axis articulated industrial robot rated at 30 kg payload and 1,850 mm reach, engineered for simultaneous multi-press tending and end-of-line pallet stacking at heights up to 1.6 m. Its third-generation compact high-rigidity ("3C") arm reduces inertia, enabling 150°/sec joint speeds while maintaining ±0.2 mm repeatability across continuous production cycles—delivering the throughput of a heavier robot at a markedly lower acquisition and operating cost.

Full Technical Specifications

Core Advantages

Dual-Function in One Robot: Stamping Tending + Palletizing

The 1,850 mm reach spans the full footprint of a 3–4 press L-shaped or linear layout. The same robot that removes parts from the final press carries them directly to the pallet, eliminating a dedicated transfer conveyor and a separate palletizing unit. Typical layout saves ¥80,000–¥150,000 in conveyor and secondary robot investment.

4-Axis Simplicity = Lower Total Cost of Ownership

Handling and palletizing tasks require vertical pick-and-place motion, not complex multi-orientation wrist work. By eliminating Axes 5–6, the B1850-3C-4 has 33% fewer joints than a 6-axis robot. Fewer joints mean fewer servo drives, fewer cables, fewer potential failure points. In-house maintenance is straightforward: most factories report first-response self-repair within 30 minutes without external engineer support.

1.6 m Certified Stack Height Matches Export Pallet Standards

The datasheet-rated 1,600 mm maximum stacking height aligns precisely with standard export pallet heights (ISO 6780 and common 1,200 × 1,000 mm pallets loaded to 1.4–1.6 m). Parts arrive on the pallet ready for forklift extraction and container loading—no manual re-stacking, no secondary touch.

±0.2 mm Repeatability — Fit-for-Purpose Accuracy

For stamped-metal part handling and carton/box palletizing, ±0.2 mm is the industry-accepted threshold. The B1850-3C-4 delivers this accuracy consistently at full speed across all 4 axes, verified over a 100,000-cycle test protocol at the SZGH Shenzhen factory.

Third-Generation "3C" Compact High-Rigidity Arm

The 3C designation indicates the third iteration of SZGH's compact-rigidity arm design: reduced arm cross-section lowers rotational inertia, allowing faster acceleration/deceleration without sacrificing structural stiffness. The result is a 150°/sec joint speed at 230 kg robot weight—a competitive speed-to-mass ratio in the 30 kg payload class.

Application Scenarios

B-Series Model Comparison & Selection Guide

All B-Series models share the 4-axis architecture, CE certification, and ±0.2 mm repeatability. Select by payload and reach.

Selection tip: Choose B1850-3C-4 when your payload is 10–30 kg, your press line or conveyor spans 1.5–1.8 m, and your pallet height target is ≤1.6 m. Step up to B2300-E-4 or B2100-F-4 for payloads above 30 kg.

Customer Case Study

By Fannie Chen, CEO, Shenzhen Guanhong Automation Co., Ltd. (SZGH)

A metal-products export factory in Egypt came to us with a classic multi-press labour problem. They had four stamping presses arranged in an L-shaped layout—two presses on one arm of the L, two on the other. After each press cycle, a worker had to manually remove the part and pass it to the next station. At the end of the line, two more workers palletised the finished parts onto export pallets that needed to reach 1.4 m height to meet the container-loading standard. Six people, per shift, on one line.

The challenge with their L-shaped layout was reach. Most robots their existing integrator had quoted were either too short in the arm (missing the corner press) or 6-axis models priced at nearly double the budget. I walked them through why a 6-axis robot was overkill: palletising a rectangular metal stamping to a fixed pallet position is a 4-axis motion. Adding two extra axes adds cost, adds maintenance complexity, and adds programming time—none of which benefits this application.

The B1850-3C-4's 1,850 mm reach covered the full diagonal span of the L-shaped layout. A single robot, positioned at the apex of the L, could service all four presses in sequence and carry parts directly to the exit pallet. The datasheet-rated 1.6 m stacking height matched their 1.4 m export pallet target with 200 mm of margin—no second adjustment, no manual topping-up. The pallet comes out of the cell, the forklift picks it up, and it goes straight into the container.

Six people became one supervisor. The customer's payback calculation worked out to 14 months at two-shift operation. They have since ordered a second B1850-3C-4 for an adjacent press line.

Control System & Integration Notes

The B1850-3C-4 ships standard with the SZGH-CNC Series controller, compatible with:

• SZGH CNC5 / CNC6 pendant — colour touchscreen, graphical teach programming, no G-code required

• EtherCAT / Modbus RTU / Profibus — seamless integration with mainstream PLCs (Siemens, Mitsubishi, Delta, Keyence)

• I/O expansion board — 24-point digital I/O standard, expandable to 48 points for complex press-signal interlocks

• Press signal synchronisation — direct connection to stamping machine stroke signal for safe entry/exit timing

• Vision interface — optional camera bracket and image-processing module for position-correction palletising

• Pallet pattern editor — onboard pallet-configuration wizard supporting rows × columns × layers programming without external software

Installation checklist provided: floor anchor template, cable conduit routing guide, and press-interlock wiring diagram included with every shipment.

Certifications & Warranty

Frequently Asked Questions

Q1. Why choose a 4-axis robot over a 6-axis robot for stamping and palletizing?

A1. Stamping line tending and pallet stacking are fundamentally vertical pick-and-place tasks. They require positioning in X, Y, Z, and one rotation axis (wrist orientation)—exactly the four degrees of freedom the B1850-3C-4 provides. A 6-axis robot adds two extra axes that are unused in these applications, increasing purchase price, programming complexity, and the number of potential failure points. For stamping and palletising, 4 axes is not a compromise—it is the correct engineering choice.

Q2. Can the B1850-3C-4 really serve multiple presses simultaneously?

A2. Yes. With a 1,850 mm working radius and a 150°/sec joint speed, the robot can cycle between 3–4 presses arranged in a linear or L-shaped layout within the cycle time of modern stamping machines (typically 4–8 seconds per stroke). The controller supports multi-press signal interlocking so the robot enters each press only when the die is open and the part is ready.

Q3. How does ±0.2 mm repeatability compare to what is needed for palletizing?

A3. Industry practice for carton and metal-part palletising requires ±0.5 mm or better to ensure consistent layer alignment and pallet stability. The B1850-3C-4's ±0.2 mm repeatability exceeds this requirement by 2.5×, giving a comfortable margin even when gripper wear or temperature variation is factored in.

Q4. What is the maximum pallet height the B1850-3C-4 can stack to?

A4. The datasheet-certified maximum stacking height is 1,600 mm (1.6 m). This aligns with standard export pallet heights used in most manufacturing industries. The robot's vertical axis geometry and controller are calibrated to maintain ±0.2 mm placement accuracy throughout the full 1.6 m stack range.

Q5. Can this robot be used in a dusty or slightly humid stamping environment?

A5. The standard B1850-3C-4 carries an IP54 protection rating, guarding against dust ingress and water splashing. For environments with metalworking coolant spray or heavy particulate, SZGH can supply an IP65 upgrade option. The operating ambient temperature range is 5°C–45°C.

Q6. How long does it take to install and program the B1850-3C-4?

A6. Mechanical installation (anchor, cable routing) typically takes 1 day. Basic pallet-pattern programming using the onboard pallet wizard takes 2–4 hours for a standard grid pallet. A full press-line integration including interlock wiring and cycle optimisation is typically completed in 3–5 days by a qualified integrator or an SZGH regional agent.

Q7. Does SZGH provide end-of-arm tooling (grippers) for the B1850-3C-4?

A7. Yes. SZGH offers a range of matched gripper tooling including magnetic grippers for stamped metal parts, vacuum cup arrays for flat surfaces, and mechanical parallel grippers for boxed goods. Custom tooling design is available for non-standard part geometries. Tooling drawings and CAD files are provided for in-house fabrication.

Q8. What after-sales support is available outside China?

A8. SZGH provides WhatsApp 24/5 technical support (response within 2 hours during business days). Regional service agents are active in the USA, Turkey, Romania, Russia, Egypt, Thailand, and Mexico. Spare parts (servo drives, encoders, cable assemblies) ship from Shenzhen within 3 business days. Remote diagnosis via controller log export is available for most faults.

Request a Quote — SZGH B1850-3C-4

Ready to configure the B1850-3C-4 for your press line or palletising application? Contact our export team for a detailed quotation, CAD model download, and application feasibility review.

When enquiring, please share: payload requirement, press layout sketch (or description), pallet dimensions and target stack height, number of shifts per day. This allows our team to confirm fit and provide accurate cycle-time estimates within 24 hours.

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