SRA100J Six-axis robotic arm (manipulator)
100kg / 1634mm
SRA100J Specification parameters
Nachi-Fujikoshi (NACHI) SRA100J spot welding robot, with a load capacity of 100kg and a reach of 1634mm.
Model introduction
SRA100J: Rated load 100kg · Maximum reach: 1634mm · Repeatability± 0.1mm · Number of axles: 6 axes · Main unit weight: 670kg. Specifications are sourced from the official Nachi-Fujikoshi (NACHI) website.
SRA Series Spot Welding Robots · Series technical features
100-250kg · Automotive welding
Originating from the world's first servo motor spot welding robot in 1979.
SRA100J Short-arm high-speed design, SRA210/250 long arm covers large welding areas.
Wrist space supports welding machine cable packs, ensuring stable beats.
SRA Series Spot Welding Robots · Other models in the same series
Compare load and reach to choose the model that best suits your process.
SRA100J Model positioning and working condition adaptation
SRA100J It belongs to the Nachi-Fujikoshi SRA series spot welding robot, featuring a rated load of 100kg, a motion radius of 1634mm, and a repeatability of ±0.1mm. Nachi-Fujikoshi's technical foundation is represented by Japanese compact models: the MZ series of low-load, high-speed models excel in lightweight arms and rhythmic beats; The control platform is the FD series controllers (FD8/FD11, etc.), and the program ecosystem is EX language + teach pendant.
From the perspective of working condition adaptation, typical applications for positioning large loads (100kg) are:Integrated palletizing, die-casting and part-picking, heavy handling and welding。 The long reach (1634mm) covers multiple stations and large pallets, reducing robot movement or coordination with ground track expansion. ± 0.1mm repeatability meets handling and palletizing conditions; For precision assembly applications, it is recommended to use visual guidance for a closed-loop position. Foundation load-bearing and base fastening torque under heavy load conditions are essential items for installation acceptance; if the inertia ratio exceeds the limit, the cycle time will degrade significantly.
| Parameters | Engineering interpretation and usage recommendations |
|---|---|
| Rated load: 100kg | It is recommended to reserve a load margin of 20%–30%; Verification is made by combining end self-weight + workpiece + imbalanced load inertia, especially sensitive to high-speed conditions |
| Radius of motion: 1634mm | Determine the radius of the workcell layout: bins, tooling, and fences are bounded by maximum arm span + safety distance; Verify the accessibility of each pick-and-place point during cross-station service |
| Repeatability: ±0.1mm | Repeatability ≠ absolute accuracy: Precision assembly requires external measurement closed-loop or visual guidance; Long-term accuracy trends rely on annual retest management |
| Number of axes: 6 | Six-axis all-posture capability, the preferred choice for complex trajectory and inclined surface operations |
| Main body weight: 670kg | Installation base and foundation load-bearing check based on weight + dynamic load; Floor slab installation requires structural calculation, with heavy-duty models serving as independent foundations |
| Controller: FD series controllers (FD8/FD11, etc.) | Decide on the process ecosystem, spare parts channels, and second-hand residual value; Currently, spare parts channels are smooth, and repair and upgrade paths are mature |
Control systems and common failure modes
SRA100J Supporting FD series controllers (FD8/FD11, etc.), with EX language + teach pendant for programming languages and development environments. Maintenance of this generation of control platforms focuses on three basic components: power, storage, and cooling—most "sudden downtime" can be detected in advance when preventive maintenance is in place.
| Failure mode | Typical performance | Disposal recommendations |
|---|---|---|
| Driver alarm and power unit aging | Driver alarm and power unit aging | Included as a mandatory inspection item for annual maintenance, with spare parts stocked in advance |
| The encoder battery is depleted | Encoder battery depleted (origin lost) | Initial interpretation of alarm codes by reference with manuals, remote diagnosis allows for early positioning |
| Teach pendant cable core breakage | Teach pendant cable core breakage | Daily inspection coverage, with abnormal trends (abnormal noises/temperature rise/errors) recorded |
| Reducer lubrication deterioration | Reducer lubrication deterioration (temperature rise at high speeds) | Quarterly dust removal maintenance and cabinet temperature monitoring |
| Maintenance projects | Cycle recommendations | Key points |
|---|---|---|
| Battery Annual Replacement (Powered Operation) | Year | Battery Annual Replacement (Powered Operation) |
| High-speed model reducer grease is managed according to shortened cycles | According to the manufacturer's manual cycle | High-speed model reducer grease is managed according to shortened cycles |
| Quarterly inspection of control cabinet fans | Quarterly | Quarterly inspection of control cabinet fans |
| Cable and drag chain inspection | every six months | Insulation, shielding, and bending radius inspection of power and encoder lines, as well as wear of cables inside the drag chain, are the main causes of intermittent faults |
| Zero point and accuracy retest | Every year | Repeatability measured by dial gauges or laser trackers, drift trend digitization—accuracy degradation can be seen six months in advance |
| Control cabinet dust removal and fans | Every quarter | Filter cleaning, fan speed and noise checks, cabinet temperature recording; Dust environments shorten the cycle |
Henghuan's service capabilities for SRA100J
This site is a third-party robotics technology service provider. SRA100J eight major business support services are as follows (sorted by service frequency for each model):
- Maintenance and repair:SRA100J on-site diagnosis, board-level maintenance, and annual maintenance contract—including annual battery replacement (live operation), etc., are brand-exclusive items we follow SOPs and respond to Sichuan-Chongqing on the same day.
- Used & in-stock robot sales: The MZ series has stable second-hand circulation, offering high speed sorting and cost-effective loading and unloading conditions, making it a cost-effective Japanese choice. In-stock SRA100J or equivalent models come with a full-function test report and a 12-month warranty.
- Sales of new industrial robots: When adding new production lines or replacing entire batches, we conduct cross-brand selection comparisons based on process requirements (including Nachi-Fujikoshi models of the same class) and provide configuration and pricing plans.
- Applied technology services:SRA100J process programming, trajectory optimization, tap time potential, and mold-changing formula management, with targeted commissioning according to the conditions of whole palletizing, die-casting and part-picking, heavy handling, and welding.
- Research and development of automation equipment: Custom fixture ends, peripheral tooling, and safety fences for SRA100J, with interfaces designed according to Nachi-Fujikoshi flange and IO standards.
- Robot rental: Short-term capacity or process validation period available for rental SRA100J Same-class in-stock models, including transportation, installation, and commissioning, flexible rental periods with flexible purchase options.
Common issues with this device
Is it easy to find spare parts for SRA100J?
Nachi-Fujikoshi: Spare parts channels for this generation are smooth; we have in-stock or short-cycle channels for regular parts such as drivers, power modules, batteries, and teach pendant components; It is recommended to allocate consumables for annual battery replacement (live operation) according to the annual maintenance contract.
With a nominal load of 100kg, how much can it actually handle?
The rated load is the static load limit of the flange surface. In actual selection, three factors must be considered: the self-weight of the end fixture (vacuum suction cup groups or grippers often account for 2–5kg), the inertia generated by the workpiece offload (checked according to the inertia ratio when the center of gravity deviates from the flange center), and the dynamic load during high-speed movement. The conventional engineering practice is to keep the "end + workpiece" within 70%–80% of the rated value to ensure cycle time and service life.
If the equipment's accuracy deteriorates after several years of use, how can it be restored?
According to the inspection order: first check whether the zero point is drifting (common after collision or battery depletion), then perform zero calibration; Check the reducer's return error (actual measurement of forward and reverse positioning deviation; if exceeded, disassemble or replace); Then check the installation base fastening and foundation settlement; Finally, trajectory compensation parameter restructuring. Most accuracy issues can be mostly restored after calibration and maintenance, so there is no need to rush into major repairs—we first release the inspection data before deciding on the plan.
Are second-hand SRA100J worth buying?
The MZ series is a Japanese choice for stable second-hand circulation, offering high speed sorting and cost-effective loading and unloading conditions. Three essential items for second-hand procurement: comprehensive inspection reports (axial accuracy, driver status, insulation and battery), maintenance history and operating hours, controller generation, and software license integrity. Every used machine we sell comes with inspection records and a 12-month warranty, and we can also accept third-party inspections designated by customers.
Need technical support or procurement for this model?
Whether it's model selection comparison, installation and commissioning, or maintenance of in-use equipment, you can contact Henghuan. Tell us about your processes, loads, and equipment status, and we will provide third-party technical support and solution recommendations.
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