Buying a used industrial robot arm means balancing up-front price, payload, reach, and which control components come with the unit. The four arms here vary widely in price, and each one answers a different application need. Even within the same category, you are not just choosing a brand; you are choosing a starting point for integration.
Quick take
The Nachi MZ07 is the high-priced, high-capacity package, with a CFD controller and pendant. The Staubli RX90 CS7 is the lower-cost entry at $2,499.99, but it is a 1997 unit with a dent and missing key. The Staubli RX130-B and Mitsubishi RV-6S-S41 fill the middle, giving you two distinct paths: a French-made Stäubli arm and a model with LENZE drive compatibility.
Price comparison
| Product | Price | Bar |
|---|---|---|
| Staubli RX90 CS7 | USD 2,499.99 | |
| Nachi MZ07 | USD 7,999.99 | |
| Mitsubishi RV-6S-S41 | USD 3,200.00 | |
| Staubli RX130-B | USD 3,410.00 |
Prices are listed in USD.
Decision matrix
| Decision driver | Pick this unit | Why it fits |
|---|---|---|
| Lowest up-front cost | Staubli RX90 CS7 | The CS7 control generation is paired with the RX90 6-axis arm and carries the lowest price in the group. |
| Higher payload and arm reach in one package | Nachi MZ07 | The 7 kg payload and 723 mm reach are the key specs here, and it includes the controller and teach pendant. |
| French-made Stäubli arm in the mid-range | Staubli RX130-B | It is a standard-construction RX130-B arm assembly with Stäubli Arm-type controls. |
| Reusing a LENZE drive or working with Mitsubishi | Mitsubishi RV-6S-S41 | The RV-6S-S41 lists LENZE EVS9323-EPV004 as a compatible model. |
Product notes
Staubli RX90 CS7
The Staubli RX90 CS7 is the entry point of this group. It is a 6-axis robot arm with CS7 controls from 1997, and the construction type is standard. That low price comes with visible trade-offs: the unit has a dent on the corner and is missing the key. For a shop that already works with Stäubli CS7 equipment, this could be a useful source of spares or a base for a dedicated cell. The included items are limited to what is shown and named, so the physical scope is the arm and controller as pictured. If the cosmetics are acceptable and the older control generation fits your setup, this is the most affordable way into a 6-axis arm.
Nachi MZ07
The Nachi MZ07 commands the top price in the group, but it bundles a 7 kg payload and 723 mm reach with the CFD controller and teach pendant. Those three items make it a more complete package than the bare arms in this comparison. The model number and the 'Blend Master' part number appear on the unit, so procurement teams can trace the serial-specific identity even if the part number does not follow the usual Nachi format. The 723 mm reach means it is best suited to compact work cells rather than very large envelopes. If you need a mid-size payload with controls included and you want to avoid sourcing a teach pendant separately, this is the unit to consider.
Mitsubishi RV-6S-S41
The Mitsubishi RV-6S-S41 sits between the two Stäubli entries and gives you a clear compatibility hook: the compatible model is LENZE EVS9323-EPV004. If your automation stack already uses that LENZE drive, this arm can be integrated without hunting for an unidentified controller. The UPC/EAN identifier is marked as not applicable, so tracking by standard barcode is not part of this unit's record. The emphasis here is on the RV-6S-S41 model and the LENZE compatibility, which makes this more of a component arm for someone who can match it with the rest of the motion system.
Staubli RX130-B
The Staubli RX130-B is described as a French-made arm assembly with standard construction. The RX130-B model name and the 'Robotic Arm Assembly' type make it straightforward to identify on the RX platform. For a buyer in the middle of the budget range who wants a Stäubli arm with the RX130-B model designation and already has compatible control hardware, this French-built unit is the mid-range pick. The unit centers on the arm itself and the Stäubli Arm-type controls, so it pairs most naturally with an existing automation setup that can drive it.
Final recommendation
- If you need the lowest entry price into a 6-axis arm and can accept a 1997 unit with cosmetic wear, the Staubli RX90 CS7 is the pick.
- If you need the full package with controller and teach pendant, the Nachi MZ07 is the most complete option.
- If you want a Stäubli arm in the middle price band and the RX130-B model suits your cell, go with the Staubli RX130-B.
- If you are reusing a LENZE drive or need a Mitsubishi arm, the Mitsubishi RV-6S-S41 is the logical match.
