SZGH-T990B: 6-Axis Precision Robot Arm — 5 kg Payload | 990 mm Reach | ±0.03 mm Repeatability

What Is the SZGH-T990B?

The SZGH-T990B is a six-axis articulated industrial robot arm engineered for high-precision, small-parts manufacturing environments. With a 5 kg payload capacity, 990 mm reach, and a verified repeatability of ±0.03 mm — the tightest specification in SZGH's entire T series — the T990B is the preferred choice for electronics assembly, precision deburring, micro-welding, and automated visual inspection where dimensional tolerance is non-negotiable. Its lightweight 55 kg body and tri-mount compatibility (floor, bracket, ceiling) make it one of the most deployment-flexible compact robots available at this price point from any manufacturer.

Full Specifications

Core Advantages

Highest Repeatability in the SZGH T Series — ±0.03 mm

Where most T-series models deliver ±0.05 mm to ±0.15 mm, the T9905 achieves ±0.03 mm verified under load. For 3C electronics, precision fastening, or micro-component placement, this is the margin that separates a good robot from a production-ready one. Every T9905 unit is bench-tested against this specification before shipment.

Lightest Body in the T Series — ~55 kg

At approximately 55 kg, the T9905 is the lightest robot in the SZGH T lineup. This matters practically: a lighter arm means lower structural requirements for ceiling or bracket mounts, faster installation during factory setup, and easier relocation when production lines are rearranged. Facilities running multi-cell layouts gain real scheduling flexibility.

990 mm Reach Covers Standard Single-Operator Workstations

The 990 mm arm span maps precisely to the footprint of a single-person workstation — wide enough to sweep from a feeder tray to a conveyor output, without the overreaching inefficiency of a 1200 mm+ arm in a compact cell. No wasted cycle time on large arc motions.

Tri-Mount Flexibility Without Structural Modification

Ground, angled bracket, and inverted ceiling mount are all supported without hardware modification. Ceiling installation in particular reduces the robot's floor shadow to near zero, freeing the work surface below for fixturing, conveyors, or human cobot-style interaction.

Full-Speed Wrist Axes — 222°/sec on Axes 4–6

The wrist joint speed of 222°/sec on axes 4 through 6 allows rapid reorientation during pick-and-place cycles without becoming the bottleneck. Combined with the ±0.03 mm repeatability, the T9905 does not force a tradeoff between speed and accuracy across typical small-part cycle times.

Application Scenarios

T-Series Comparison: Where T990B Fits

Key insight: If your application requires the tightest tolerance in the T series and your parts weigh under 5 kg, the T9905 is the only T-series model that guarantees ±0.03 mm. For heavier or longer-reach tasks, see the T1000-C-6 or T1400-D-6.

Customer Case Study

By Fannie Chen, CEO, Shenzhen Guanhong Automation Co., Ltd. (SZGH) | May 2026

In late 2024, I received an inquiry from Mr. Nguyen, production manager at a mid-sized 3C accessories factory in Ho Chi Minh City. His line produced small aluminum connector housings — parts with a tolerance spec of ±0.05 mm — and he was exploring automation for the assembly and press-fit station. The numbers looked good on paper: the T990B's ±0.03 mm repeatability was twice the precision he needed. But Mr. Nguyen was direct with me: he had seen too many Chinese robot datasheets that looked impressive and performed differently on the floor.

I understood his skepticism completely. So instead of sending another spec sheet, I invited his engineering team to our factory in Shenzhen for a live verification day.

We ran the T9905 through a four-hour repeatability test on our CMM bench — 200 consecutive cycles, full load, measuring actual positional deviation. The results logged between ±0.022 mm and ±0.028 mm across all six axes. His lead engineer stood next to the measurement screen the entire time. No slides, no edited video — just the machine running and the numbers appearing.

That visit closed the deal. We delivered three T990B units in January 2025, integrated with a Keyence vision system for part orientation correction. The line has been running two shifts daily since then, with a defect rate on their press-fit station that Mr. Nguyen told me dropped by 73% compared to their previous semi-manual process. He has since ordered two additional units for a second product line.

What I tell every customer who asks whether a Chinese robot can hold tight tolerances: come see it run. The T990B does not need marketing language. It just needs to be tested.

Control System & Integration

The SZGH-T990B is designed to operate with the SZGH CNC Robot Controller (sold separately or as a complete cell package). The controller supports:

• Teach pendant programming — intuitive point-teach for path generation without coding

• G-code / SZGH proprietary script — for integration with existing CNC-style workflows

• I/O interface — standard 24V digital I/O for gripper, conveyor, and vision trigger signals

• Vision integration — compatible with Keyence, Cognex, SZGH-V series, and most 3rd-party Ethernet-connected cameras via TCP/IP

• Bus protocols — EtherCAT, Modbus TCP, PROFINET (optional expansion card)

• Software — SZGH RoboStudio PC software for offline programming, simulation, and path optimization

Typical integration accessories:

• Electric / pneumatic gripper mounting flange (ISO 9283 tool flange)

• Collision detection module (optional, recommended for cobot-style cells)

• Cable management kit for ceiling/inverted mounting

• SZGH Vision Calibration Kit for hand-eye calibration

For full integration support, contact our technical team via WhatsApp or email before placing an order — we provide a free pre-sales technical consultation for every project.

Certifications & Warranty

All T990B units undergo individual inspection and a repeatability bench test before shipment. Test reports are available on request.

Frequently Asked Questions

Q1: What does ±0.03 mm repeatability mean in practice for electronics assembly?

Repeatability measures how precisely the robot returns to the same programmed position across repeated cycles. At ±0.03 mm, the T990B can reliably handle connector press-fits, small fastener driving, and PCB component placement where part tolerances are in the 0.05–0.10 mm range. It leaves a meaningful margin between the robot's positional variance and the part's tolerance band, reducing reject rates caused by positional drift.

Q2: How does the T990B compare to a FANUC LR Mate 200iD/4S or similar compact robots?

The T990B targets the same application category as the FANUC LR Mate 200iD series and the Yaskawa GP4 — small-payload, high-precision assembly cells. Its ±0.03 mm repeatability matches or exceeds comparable models in that class. The primary advantage of the T990B is total cost of ownership: the robot itself, the matched SZGH controller, and post-sale support are substantially more accessible in price, with no proprietary lock-in on spare parts.

Q3: Can the T990B be mounted upside-down (ceiling mount)?

Yes. The T990B supports ground, angled bracket, and inverted ceiling mounting natively. For ceiling installation, SZGH provides a dedicated cable management kit and ceiling mount bracket. The ~55 kg body weight makes structural requirements for ceiling installation modest compared to heavier T-series models.

Q4: What end-effectors are compatible with the T990B?

The T990B uses a standard ISO 9283 tool flange. It is compatible with electric and pneumatic grippers, vacuum cups, welding torches, deburring spindles, and vision-mounted tooling from any manufacturer using the standard flange interface. SZGH also supplies a matched electric gripper and force-sensing module.

Q5: Is the T990B suitable for collaborative (cobot-style) operation near human workers?

The T990B is a standard industrial robot and requires a safety fence or guarding by default. However, with the addition of SZGH's optional collision detection module and appropriate safety PLC integration (ISO 10218-2 compliant cell design), reduced-speed collaborative zones can be implemented. For fully certified cobot operation with no guarding, this is not the right product — please inquire about SZGH's collaborative arm series.

Q6: What is the lead time for the T990B?

Standard lead time is 15–25 business days from order confirmation, including quality testing and shipping preparation. For large-volume orders (5+ units), lead times are discussed individually during order confirmation. Expedited production is available in some cases — contact us with your delivery requirement.

Q7: Does SZGH provide on-site installation and commissioning support?

Yes. SZGH provides remote commissioning support via video call at no additional charge. On-site commissioning by a local SZGH agent is available in the USA, Turkey, Romania, Russia, Egypt, Thailand, and Mexico. For other regions, we provide comprehensive video documentation and can arrange third-party integrator coordination.

Q8: Can the T990B handle small welding tasks, or is it primarily for assembly?

The T990B is used for both. Its ±0.03 mm repeatability and 222°/sec wrist speed make it capable of consistent small weld seams — particularly for TIG/laser spot welding of small metal components. The 5 kg payload is sufficient for a standard welding torch. For heavier torch configurations or long seam welding on structural parts, the T1000-C-6 or T1400-D-6 would be more appropriate.

Request a Quote / Contact Us

Ready to evaluate the T990B for your production line? We offer free pre-sales technical consultation for every project — including reach envelope analysis, cycle time estimation, and integration planning.

When you contact us, please share:

• Your application (what the robot will do)

• Part weight and approximate dimensions

• Required cycle time or throughput

• Your facility country (for local agent assignment)

We respond to all inquiries within 24 hours on business days.

Related Products

Explore other SZGH robots frequently paired with or compared to the T9905:

• SZGH-T750-B-6 — 6 kg payload, 750 mm ultra-compact reach, ideal for tight-space assembly cells

• SZGH-T1000-C-6 — 10 kg payload, 1000 mm reach, next step up when you need more capacity

• SZGH-S450-B-4 SCARA Robot — 4-axis SCARA for high-speed flat-plane pick-and-place

• SZGH-Arm-1832 — Alternative arm configuration for specialized integration requirements