Industrial Robot Joint Solution – KUKA KRC4 00-106-558 RV-30B-76 | KR30 Series
Where This Product Is Used
The KUKA KRC4 Reduction Gear (Part No. 00-106-558 / RV-30B-76) is a precision cycloidal reducer engineered for the joint axes of KUKA KR30 series industrial robots. It is a direct OEM replacement for the RV320E-185 gearbox (cross-reference: 00-184-319) and is deployed in high-cycle, high-torque automation environments including:
- Automotive body welding lines – spot welding and MIG/MAG welding cells requiring ±0.02 mm repeatability
- Heavy-duty material handling – palletizing, press-tending, and transfer systems up to 30 kg payload
- Machine tending & CNC loading – continuous-duty cycles with minimal backlash requirements
- Foundry & die-casting automation – high-temperature, high-vibration environments
- Structural assembly – aerospace and heavy equipment sub-assembly lines
Technical Specifications
| KUKA Part Number | 00-106-558 |
| Cross-Reference Part No. | 00-184-319 |
| Reducer Model | RV-30B-76 (Nabtesco RV320E-185) |
| Compatible Robot | KUKA KR30, KR30 L16-2, KR30 HA (KRC4 controller) |
| Reducer Type | Cycloidal (RV-type) precision reducer |
| Reduction Ratio | 76:1 |
| Rated Torque | ~320 N·m |
| Applicable Axis | Axis 2 / Axis 3 (J2/J3) |
| Mounting Interface | Flange-mount, OEM bolt pattern |
| Weight | ~300 g (unit only) |
| Controller Compatibility | KUKA KRC4, KRC4 compact |
Why Engineers Specify This Model
- OEM-matched geometry – direct bolt-on replacement; no shimming or machining required
- Zero-backlash cycloidal design – maintains positioning accuracy over millions of cycles
- High shock-load tolerance – RV-type architecture absorbs impact loads in press-tending and stamping cells
- Sealed lubrication – factory-filled grease reduces maintenance intervals and contamination risk
- Dual part-number traceability – 00-106-558 and 00-184-319 both reference the same assembly for procurement flexibility
- Proven MTBF – Nabtesco RV320E platform with documented service life in 24/7 production environments
Complete System Bill of Materials
For a full joint rebuild or preventive maintenance kit on the KUKA KR30, engineers typically source the following alongside this reducer:
- KUKA KR30 Axis 2/3 servo motor (1FK7 series)
- Motor coupling / spline adapter
- Nabtesco RV grease (Molywhite RE No.00 or equivalent)
- Joint sealing O-ring set
- KRC4 drive module (KPP / KSP) if drive-related fault is present
- Encoder cable harness (axis 2/3)
Compliance & Industry Standards
- Manufactured to KUKA OEM specification for KR30 series
- Nabtesco RV320E platform complies with ISO 9283 robot performance standards
- RoHS-compliant materials
- CE-marked robot system compatibility (KRC4 platform)
- Suitable for use in ISO 10218-1 compliant robot safety cells
Quality Assurance & Sourcing
Konmask.com sources KUKA spare parts through verified industrial distribution channels. Each unit is:
- Inspected against OEM dimensional and functional specifications
- Packaged in anti-static, moisture-resistant protective packaging
- Traceable by batch and part number for warranty and audit purposes
- Supported by our 12-month quality guarantee on genuine parts
How to Source This Part
- Confirm your robot model and axis number from the KUKA nameplate or KRC4 controller software (WorkVisual / KUKA smartPAD)
- Cross-reference part number: 00-106-558 or 00-184-319 (both valid for this reducer)
- Add to cart or contact support@konmask.com for volume pricing and lead time
- Request a proforma invoice for customs clearance if importing
- Specify shipping urgency – express air freight available for critical production downtime situations
Application-Specific FAQ
Q: Is 00-106-558 the same as 00-184-319?
A: Yes. Both part numbers reference the same KUKA KR30 reduction gear assembly (RV-30B-76 / RV320E-185). 00-184-319 is the updated KUKA catalog number; 00-106-558 is the legacy reference. Either is accepted for ordering.
Q: Which axis does this reducer serve on the KR30?
A: This reducer is used on Axis 2 (A2) and/or Axis 3 (A3) of the KUKA KR30 robot arm, which are the primary load-bearing axes for the upper arm and forearm joints.
Q: Can this be used on KRC2-controlled KR30 robots?
A: The mechanical reducer itself is compatible; however, confirm the motor and encoder interface with your KRC2 configuration before ordering. Contact us for clarification.
Q: What grease should be used during installation?
A: Nabtesco recommends Molywhite RE No.00 grease. Fill quantity and procedure should follow the KUKA KR30 maintenance manual (KUKA document BA KR 30).
Q: Do you offer installation support?
A: We provide technical documentation and remote guidance. On-site installation support can be arranged through our partner network in select regions.
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