ABB IRB 140 vs Mitsubishi Electric RV-4FR: Robot Comparison

IN A NUTSHELL

ABB IRB 140 vs Mitsubishi Electric RV-4FR is a choice about assembly and machine tending. ABB IRB 140-6/0.81 and Mitsubishi Electric RV-4FR differ in their working envelope, loading assumptions and engineering ecosystem. A useful decision starts with the exact mechanism and process, then checks whether either robot can execute the required path with the real tool attached. This comparison separates documented specifications from application-level engineering judgments.

ABB IRB 140 vs Mitsubishi Electric RV-4FR: quick verdict

Shortlist ABB IRB 140 for 6 kg industrial handling within the documented 810 mm working reference. Shortlist Mitsubishi Electric RV-4FR for 4 kg industrial handling within the documented 514.5 mm working reference. Neither is a universal winner: a robot that can carry the load may still fail the fixture-access, controller or maintenance requirements.

The numerical comparison below uses ABB IRB 140-6/0.81 against Mitsubishi Electric RV-4FR. The stated model scope matters when comparing later revisions or differently equipped installations. Published repeatability describes return to a taught position under specified conditions; it does not establish complete-cell accuracy or prove a faster production cycle.

Specifications and exact configuration scope

Read the reach row together with the geometric notes below. Manufacturers may specify an arm-link sum, a wrist-centre motion area or reach to the flange; those dimensions are not interchangeable. The table does not establish access to every point at every tool angle. Controller references identify reviewed packages, and actual compatibility must be confirmed by model, software version and region.

ABB IRB 140: design and configuration

ABB IRB 140 is compared at 6 kg and 810 mm in the exact selected configuration. The exact selected reference is IRB 140-6/0.81 with six axes and ±0.03 mm position repeatability, rather than an older 5 kg arm specification or the faster IRB 140T. The manufacturer’s named six-kilogram product-range reference pairs the 810 mm reach with that load; neither figure should be expanded by borrowing another IRB model’s envelope. The compact arm can be useful around closely spaced fixtures, but inner workspace, wrist attitude and service routing still determine access. The published reference lists IP67 and distinct cleanroom/foundry packages; a protection or cleanliness label must not be extended to every delivered controller, cable set or cleaning process. Match the actual mechanical generation, controller, software, safety functions, external-axis support and machine interfaces in the quotation. Do not infer compatibility with every current ABB control package or assume a retrofit is included. Include the complete gripper, adapter, sensors, part and cables in wrist mass, moment and inertia. Check the loaded approach through the smallest opening and a recoverable pose after a stop. Floor, wall, inverted and tilted arrangements in the documentation require their approved mounting conditions, support and maintenance access. Industrial handling, assembly or process capability does not make this an unguarded collaborative installation. Validate safeguarding, stopping distances, part retention and restart. Pose repeatability is not calibrated absolute accuracy, path quality or a production-cycle measurement. Confirm legacy-generation support, supplied condition, spares and a configuration-specific price; archived technical coverage does not imply current warehouse availability.

Mitsubishi Electric RV-4FR: design and configuration

The Mitsubishi Electric MELFA RV-4FR is a 6-axis vertical articulated robot with a 4 kg payload, a 514.5 mm reach and ±0.02 mm repeatability. It is a compact arm for small-part assembly, handling and inspection. The standard arm is rated IP40, and IP67 oil mist and ISO class 3 cleanroom versions are available. The arm weighs 39 kg and runs on the CR800-D, CR800-R or CR800-Q controller. The reviewed MELFA model is kept separate from its longer-arm derivatives and other controller packages. Confirm whether the supplied CR controller is standalone or integrated with the intended Mitsubishi control platform. For a deep fixture, compare the complete wrist approach and retreat, rather than maximum reach alone.

For this pair, Mitsubishi Electric RV-4FR offers 4 kg over the stated 514.5 mm reference, compared with 6 kg and 810 mm for ABB IRB 140 example. ABB IRB 140 has the larger stated distance by 295.5 mm, but this difference is only a preliminary layout indicator because reference points and joint envelopes can differ. Locate the actual fixture in each manufacturer model before treating this as usable extra working space.

Payload, tooling and a worked load example

Consider an illustrative total wrist load of 3.2 kg: a 0.8 kg tool and adapter package carrying a 2.4 kg part or product group. This arithmetic leaves 2.8 kg below the ABB IRB 140 example’s nominal limit and 0.8 kg below Mitsubishi Electric RV-4FR’s nominal limit. These are mass differences, not safety factors or a validated load approval. A heavy camera, valve block or retained material must be included before recalculating the total.

The example exposes the practical question: is the application limited by mass, by tool offset or by wrist rotation? Mitsubishi Electric RV-4FR is the lower-or-equal nominal payload choice in this pair. ABB IRB 140 offers more or equal headline mass capacity, but that alone cannot approve an eccentric fixture. Moving the same mass farther from the flange increases the moment, and spreading it increases rotational inertia. Manufacturer load diagrams and the actual centre of gravity govern the final allowable motion.

Model the empty, partly loaded and fully loaded tool states separately. A vacuum layer gripper, a weld torch with hoses or an inspection head may change its effective loading during the cycle. Set the controller’s load data for each supported state and validate the transition logic. A payload table cannot predict acceleration derating, cable pull or transient reactions at a machine interface.

Reach, orientation and fixture access

Build the same cell model for both candidates: base height, machine opening, fixture datum, maximum part size, tool extension and access for maintenance. ABB IRB 140-6/0.81 provides a stated 810 mm reference, while Mitsubishi Electric RV-4FR provides 514.5 mm. Check the deepest production pose and the return path with the loaded tool. An arm that just touches the target at full extension may have little freedom left to turn, retract or avoid a door.

For assembly and machine tending, test the gripper jaws in their open and closed positions. Include feeder replenishment, rejected-part disposal and tool changes. Check wrist flips and singularity avoidance along the whole path. A compact robot can fit a small fixture well, while a longer arm can simplify station placement; neither geometric benefit can be assumed without the actual model.

Precision and throughput: compare the same task

The comparison uses ±0.03 mm for ABB IRB 140 and ±0.02 mm for Mitsubishi Electric RV-4FR. These figures should be read in their documented configuration scope. Repeatability is not absolute accuracy, camera calibration accuracy or finished-part capability. Fixture variation, TCP calibration, thermal conditions and tool compliance can dominate the error at the process point, especially when the tool extends far from the flange.

Ask each integrator to execute the same representative path with the same payload model, tool length, process dwell and stop conditions. Report transfer time, settling time, process time and waiting time separately. Published standard cycles often use different loads and distances; dividing one catalogue cycle by another would not establish the production advantage of ABB IRB 140 over Mitsubishi Electric RV-4FR. Use a measured or validated application cycle before assigning a throughput benefit.

Programming, controls and production integration

ABB IRB 140 is paired here with Matched ABB controller for the named 6 kg arm generation, while Mitsubishi Electric RV-4FR uses CR800-D, CR800-R or CR800-Q. Controller names identify the review baseline rather than a guarantee that all interface options are included. Compare the actual software revision, teaching workflow, diagnostic tools, fieldbus licences and recovery procedures. An existing trained team and reusable production code may outweigh a small dimensional advantage. Obtain a demonstration of the same machine handshake and interrupted-cycle recovery on both platforms.

Specify the PLC handshakes before ordering: cycle request, ready, busy, complete, fault, part present and recovery authorization. Define how an interrupted operation resumes without repeating a dangerous or quality-critical action. Vision, force sensing, fieldbus communication and external-axis coordination must be checked as explicit included or optional functions. An Ethernet connector does not by itself prove that a particular industrial protocol or software interface is licensed and supported.

Configuration and communication detail

Protection, installation and maintenance

Match the precise protection package to the process. Standard, protected, cleanroom, foundry and washing configurations can have different seals, services and maintenance requirements. Do not transfer the best optional IP or cleanroom rating to an unprotected base model. Check the controller location, cable bend radius, available lifting access and base reactions with the installer.

Treat safe operation as a property of the complete task and installation. Include the tool, sharp workpiece edges, trapping points, dropped loads and machine access. These robot systems require task-specific safeguarding; payload or compact size does not establish safe unguarded operation. Plan tool replacement and fault recovery without dismantling the whole installation, and include connector access, lubrication and spare-cable replacement in the maintenance layout.

Price and lifecycle value

Published arm list prices: Mitsubishi Electric RV-4FR is listed from $25,000. Request configuration-specific quotations for ABB IRB 140 and Mitsubishi Electric RV-4FR. An arm-only number is not the price of a commissioned production cell. Ask for separate line items for controller, pendant, communication options, end effector, safety equipment, installation, acceptance, training and warranty. Price changes, regional support and included software can reverse an apparent hardware-cost advantage. Compare the same delivered scope before calculating payback.

Compare the installed production scope: tool, fixtures, sensing, guarding, machine interface, programming, acceptance and training. For small-parts automation, include feeders, vision calibration, nests and rejected-part handling. Keep purchase cost and recurring support costs separate. No payback figure is defensible until the actual cycle, yield, utilization and installation quotation are known.

Selection and acceptance plan

Advance ABB IRB 140 when 6 kg industrial handling within the documented 810 mm working reference solves the real constraint and its selected configuration passes the load and access checks. Advance Mitsubishi Electric RV-4FR when 4 kg industrial handling within the documented 514.5 mm working reference provides the more suitable process arrangement. Reject either candidate if a mandatory pose, protection requirement or controller function cannot be demonstrated. A purchasing shortlist should preserve these conditions instead of converting a single catalogue advantage into a blanket recommendation.

Before acceptance, agree the representative parts, tool states, operating sequence and quality criteria with both suppliers. Demonstrate cold start, normal production, rejected parts, interrupted cycles and controlled recovery. Record the final tool data and software backup. This turns the comparison into a repeatable purchasing decision and helps prevent a later fixture change from invalidating the original robot selection.

Motion architecture and functionality

ABB IRB 140 has 6 arm axes and Mitsubishi Electric RV-4FR has 6 arm axes. Both have six arm axes; equal axis counts do not establish equal joint travel, inner workspace or fixture access. Compare tool detection, sensing, machine I/O and recovery as separate delivered functions.

Industries and application fit

For ABB IRB 140 vs Mitsubishi Electric RV-4FR, use the actual part and process as the industry filter. Electronics, manufactured-component handling and machine tending are candidate uses when their tool mass, access and quality requirements fit the documented configurations. These are application-selection judgments, not claims that either exact model is installed at a named customer. A food, medical-device or clean-production application additionally requires the correct material, lubrication and protection package; the base model name does not establish hygienic or cleanroom compliance.

Frequently asked questions

Which robot is better for this application?

ABB IRB 140 is the stronger starting point for 6 kg industrial handling within the documented 810 mm working reference, while Mitsubishi Electric RV-4FR is worth shortlisting for 4 kg industrial handling within the documented 514.5 mm working reference. The final choice depends on the real loaded path, required protection, controls and acceptance results. Neither a higher payload nor a longer reach establishes a universal winner.

What payload should I use for the comparison?

Use 6 kg for the specified ABB IRB 140-6/0.81 example and 4 kg for Mitsubishi Electric RV-4FR, subject to all documented load and orientation conditions. Include the tool, adapters, sensors and carried part. Confirm exact configuration, controller, wrist loading and installation envelope.

Does the stated reach guarantee access to my fixture?

No. The comparison gives 810 mm for ABB IRB 140 and 514.5 mm for Mitsubishi Electric RV-4FR using the stated model references. Joint limits, reach reference points, wrist orientation, tool length and collisions determine whether the actual fixture is accessible. Simulate the full approach and exit path.

Can I use the best specifications from every family variant?

No. Keep each named model and revision intact. A different arm length, controller generation or protection option can change the relevant specification. Do not combine one version’s maximum payload with another version’s maximum reach.

Is repeatability the same as finished-part accuracy?

No. The stated values are ±0.03 mm for ABB IRB 140 scope and ±0.02 mm for the competitor scope. Finished-part results also depend on fixtures, TCP calibration, sensing, thermal conditions and tool compliance. Validate the actual process instead of treating catalogue repeatability as a complete accuracy guarantee.

How should purchase prices be compared?

Use current written quotations for ABB IRB 140 and Mitsubishi Electric RV-4FR with the same arm, controller, software, tooling and commissioning scope. This comparison does not represent an ATC sales offer or stock confirmation. Historical review figures are not a substitute for a configuration-specific purchase quotation.

Can these robots operate safely next to people without guarding?

These specifications do not establish a safe unguarded installation. Assess the complete task, tool, load and machine interface, then implement and validate the required safeguarding and operating procedures. Do not infer collaborative operation from a compact arm, limited payload or education setting.

What should an acceptance test compare?

Use the same parts, actual tool load, fixture locations, path and quality criteria for ABB IRB 140 and Mitsubishi Electric RV-4FR. Check production timing, settling, interruptions and recovery. Include the most difficult loaded approach and retreat. Approve the exact delivered configuration and preserve its final settings.

Related ATC reviews

Read the ABB IRB 140 review

Read the Mitsubishi Electric RV-4FR review

Specifications describe the model scope identified above. Purchase pricing requires a current configuration-specific quotation. Confirm current manufacturer documentation, local supply, controller compatibility and the exact configuration before purchase.