KR 35 R1840-3 Six-axis robotic arm (manipulator)
Compact structure, comprehensive selection, intelligent micro-control, and boundless efficiency. This new product series can greatly meet the main application scenarios of small six-axis robots.
KR 35 R1840-3 Specifications
KUKA's all-new KR CYBERTECH series strongly returns to a solid wrist design, inheriting Germany's precision technology heritage. High-strength design enhances the impact resistance of industrial robots, and their structure greatly improves mechanical stability, maintaining excellent impact resistance even during high-speed operation or heavy load conditions. Repeatability reaches ±0.03mm, comparable to industry-leading standards, meeting the demands of high-precision machining. Multi-scenario comprehensive adaptation—from heavy handling and precision assembly to surface treatment (grinding/polishing/deburring) and laser processes (welding/cutting), it comprehensively covers general industry, automotive manufacturing, new energy, and other fields, empowering intelligent manufacturing upgrades with KUKA's core technology.
Model introduction
Compact structure, comprehensive selection, intelligent micro-control, and boundless efficiency. This new product series can greatly meet the main application scenarios of small six-axis robots. This series features a compact structure and reduces footprint. The mounting dimensions of the main base are consistent with KUKA's existing Cybertech series and can be switched directly. The hollow wrist structure allows for convenient internal wiring, reducing the risk of on-site interference. The beat time also meets or exceeds application requirements, demonstrating excellent product performance. The higher wrist rotation moment of inertia also greatly enhances the robot's payload capacity. It is mainly used in general industries such as photovoltaics, electronics, automotive parts, home appliances, and logistics, involving typical scenarios such as handling, assembly, machine tool loading and unloading, and grinding.
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 35 R1840-3 model positioning and working condition adaptation
KR 35 R1840-3 It belongs to the KUKA low-load robot model (5~35kg), with a rated load of 35kg, a movement radius of 1840mm, and a repeatability of ±0.03mm. 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 platforms are KR C5 basiccab and KR C5 compact-2, with a program ecosystem of KRL language + smartPAD teach pendant.
From the perspective of working condition adaptation, typical applications for medium-duty load (35kg) positioning are:Welding, machine tool wiring, medium-sized palletizing, and die-casting part removalCommon application processes for this model include assembly, sorting, packaging, machining, handling, and stamping. The long reach (1840mm) covers multiple stations and large pallets, reducing robot movement or coordination with ground track expansion. ± 0.03mm repeatability is the standard level for six-axis industrial robots, covering most working conditions such as welding, handling, palletizing, and loading/unloading. This level is the main stage for welding and loading; when selecting a positioner or dual stations, pay attention to the total cycle time and interference zone planning.
| Parameters | Engineering interpretation and usage recommendations |
|---|---|
| Rated load: 35kg | 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: 1840mm | 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: ±0.03mm | 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 unit weight: 237kg | 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 C5 basiccab, KR C5 compact-2 | 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 |
| Rated load capacity: 35kg | Source: official KUKA product page |
Control systems and common failure modes
The KR C5 basiccab and KR C5 compact-2 controllers are paired with the KR 35 R1840-3, with programming languages and development environments 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.
| 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 KR 35 R1840-3
This site is a third-party robotics technology service provider. The eight major business support services related to the KR 35 R1840-3 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 35 R1840-3, we follow SOPs and handle brand-exclusive items such as regular system image backup (hard drive failure recovery for Windows architecture), and Sichuan Chongqing responds on the same day.
- 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; The KR 35 R1840-3 or equivalent models in the warehouse 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 formula management for KR 35 R1840-3 are tailored for assembly, sorting, packaging, machining, handling, and stamping conditions.
- Research and development of automation equipment: Custom fixture ends, peripheral tooling, and safety fences for KR 35 R1840-3, with interfaces designed according to KUKA flange and IO standards.
- Robot rental: For short-term capacity or process validation periods, you can rent KR 35 R1840-3 equivalent in-stock models, including transportation, installation, and commissioning, with flexible rental terms and repurchase.
Common issues with this device
Is it easy to find spare parts for KR 35 R1840-3?
KUKA: Spare parts channels for this generation are smooth; we have in-stock or short-cycle channels for standard parts such as drivers, power modules, batteries, and teach pendant components; It is recommended to configure consumables for system image periodic backup (hard drive failures can be quickly restored under Windows architecture) according to the annual maintenance contract.
With a nominal load of 35kg, 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.
Is the used KR 35 R1840-3 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