KR 8 R1620 Six-axis robotic arm (manipulator)
In the low-load range, the KR CYBERTECH series industrial robots can offer a comprehensive range of high power density products worldwide.
KR 8 R1620 Specifications
In the low-load range, the KR CYBERTECH series industrial robots can offer a comprehensive range of high power density products worldwide. This series perfectly aligns with the space-saving unit streamlining design concept, ensuring excellent performance while significantly reducing subsequent costs.
Low-load robots (5~35kg) · Series technical features
KR CYBERTECH Series: 5-35kg load capacity, balancing speed and rigidity, covering arc welding, handling, machining, loading and unloading, and other applications.
Excellent cycle time structural rigidity, suitable for both arc welding and handling.
Hollow wrist integrated with the welding bag, shielding gas for smoother welding.
Typical application scenarios
Common application processes for this model (click to view process details):
Low-load robots (5~35kg) · Other models in the same series
Compare load and reach to choose the model that best suits your process.
KR 8 R1620 model positioning and working condition adaptation
KR 8 R1620 It belongs to the KUKA low-load robot model (5~35kg), with a rated load of 8kg, a motion radius of 1620mm, and a repeatability of ±0.04mm. KUKA's technical foundation is KRL's clear program structure, PC-based control architecture is open, and there is a large stock of automotive welding lines; The control platform is KR C4 smallsize-2 and KR C4 compact, and the program ecosystem consists of KRL language + smartPAD teach pendant.
From the perspective of working condition adaptation, typical applications for light loads (8kg) positioning are:Machine tool loading and unloading, 3C assembly, inspection, and handling of small and medium-sized parts。 The long reach (1620mm) covers multiple stations and large pallets, reducing robot movement or coordination with ground track expansion. ± 0.04mm repeatability is the standard level for six-axis industrial robots, covering the vast majority of welding, handling, palletizing, and loading and unloading operations. The end fixture is counted as a load from the most important point—the total of gripper + workpiece + sensor should not exceed 80% of the rated value. Workpieces with high inertia (long rod/uneven load) should be checked separately.
| Parameters | Engineering interpretation and usage recommendations |
|---|---|
| Rated load 8kg | 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 |
| Movement radius: 1620mm | 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: ±0.04mm | 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 |
| Protection rating: IP54 | Suitable for standard workshop environments; Dusty and moisture-prone workstations require additional protective kits or positive pressure protection |
| Main body weight: 165kg | 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 |
| Controllers: KR C4 smallsize-2, KR C4 compact | Decide on the process ecosystem, spare parts channels, and second-hand residual value; This control generation has been discontinued or is nearing discontinuation, with longer spare parts cycles; it is recommended to evaluate control system upgrade plans |
Control systems and common failure modes
The KR 8 R1620 comes with the KR C4 smallsize-2 and KR C4 compact controllers, with a programming language and development environment of KRL + smartPAD teach pendant. 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.
Strategies for the discontinued generation:The OEM spare parts supply for this model's control system has entered a long-cycle state, and the waiting time for common board failures is measured in weeks. Our recommendations fall into three categories: key production linesThe control system is upgraded to the same brand(Programs can be migrated, tooling retained, investment is about 30%–50% of the new machine); General production linesReserve redundant key spare parts(Driver board, power module, teach pendant); Near-retirement equipment is being usedHealth assessmentAfterwards, repair or replacement decisions are made based on residual value.
| Failure mode | Typical performance | Disposal recommendations |
|---|---|---|
| KRC4 power module | KRC4 power module (KPP/KSP) fault and fuse blown | Included as a mandatory inspection item for annual maintenance, with spare parts stocked in advance |
| Windows system disk aging and damage | Windows system disk aging and damage (KRC4 is Windows-based, mechanical hard drives are a weak link) | Initial interpretation of alarm codes by reference with manuals, remote diagnosis allows for early positioning |
| Control cabinet fan unit and temperature control fault | Control cabinet fan unit and temperature control fault | Daily inspection coverage, with abnormal trends (abnormal noises/temperature rise/errors) recorded |
| DSE/RDC board communication failure | DSE/RDC board communication fault (rotary transformer link) | Quarterly dust removal maintenance and cabinet temperature monitoring |
| Maintenance projects | Cycle recommendations | Key points |
|---|---|---|
| Regular system image backup (hard drive failure under Windows architecture can be quickly restored) | Periodically | Regular system image backup (hard drive failure under Windows architecture can be quickly restored) |
| It is recommended to upgrade the SSD or replace the mechanical hard drive periodically | By cycle | It is recommended to upgrade the SSD or replace the mechanical hard drive periodically |
| Replace the battery prompt prompted by the alarm (KSD/RDC related data) | According to the manufacturer's manual cycle | Replace the battery prompt prompted by the alarm (KSD/RDC related data) |
| 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 the KR 8 R1620
This site is a third-party robotics technology service provider. The eight major business supports related to the KR 8 R1620 are as follows (sorted by service frequency for each model):
- Maintenance and repair: For on-site diagnostics, board-level repairs, and annual maintenance contracts for KR 8 R1620—we followed SOPs for brand-exclusive items such as regular system image backups (fast recovery from hard drive failures in Windows architecture), and responded to Sichuan-Chongqing on the same day.
- Software and hardware upgrade services: This control generation has been discontinued; we offer control system replacement evaluations, program migration, and mechanical refurbishment solutions to keep equipment in service for another 5–8 years.
- Used & in-stock robot sales: The automotive industry has a large volume of retirements, with active circulation of used KRC2/KRC4 units; KR C2 has long been discontinued; confirm spare parts channels before purchasing; Inventory KR 8 R1620 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 batches, we conduct cross-brand selection comparisons based on process requirements (including models of the same level as KUKA), and provide configuration and pricing plans.
- Applied technology services: Process programming, trajectory optimization, tap time potential, and reconfiguration formula management for KR8 R1620 are tailored to general operating conditions.
- Research and development of automation equipment: Custom fixture ends, peripheral tooling, and safety fences for KR 8 R1620, with interfaces designed according to KUKA flange and IO standards.
- Robot rental: For short-term capacity or process validation periods, you can rent KR 8 R1620 equivalent in-stock models, including transportation, installation, and commissioning, with flexible rental periods and the option to switch to repurchase.
Common issues with this device
Is it easy to find spare parts for KR 8 R1620?
The control generation of this model has been discontinued, and OEM spare parts have entered a long-cycle supply state. Our channel strategy is a three-tier parallel approach of "OEM + disassembled parts + board-level repairs": regular parts go through spot channels, discontinued boards are used for chip-level repairs (costs about 30%–60% of the cost of replacing whole boards), and key components are recommended to be stored in the factory as redundant reserves.
With a nominal load of 8kg, how much weight 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.
Is the used KR 8 R1620 worth buying?
The automotive industry has a large volume of retirements, with active circulation of used KRC2/KRC4 units; The KR C2 has long been discontinued; confirm spare parts channels before purchasing. 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.
Contact Henghuan Back to the full series