Industrial Robot Joint Drive Solution – ABB 3HAC044841-001 | IRB6700 Series
The ABB 3HAC044841-001 (cross-reference: 3HAC043072-003) is a precision RV-550N-252.33 Reduction Gear engineered exclusively for the ABB IRB6700 heavy-duty industrial robot series. With a reduction ratio of 252.33:1, this cycloidal gearbox delivers the torque density and positional repeatability demanded by high-cycle manufacturing environments.
Where This Product Is Used
This reduction gear is a critical joint drive component deployed across the most demanding industrial automation sectors:
- Automotive Body-in-White (BIW) — Axis 1/2/3 joint replacement on IRB6700 spot-welding and handling cells at OEM and Tier-1 plants (Toyota, BMW, SAIC production lines).
- Heavy Payload Palletizing — End-of-line palletizing robots handling 150–300 kg payloads in food, beverage, and chemical logistics.
- Foundry & Die Casting — High-temperature, high-vibration environments where standard gearboxes fail prematurely; the RV-550N’s sealed design resists ingress.
- Structural Steel Fabrication — Large-format arc welding and plasma cutting gantries requiring sub-0.05 mm TCP repeatability.
- Aerospace Sub-Assembly — Precision drilling and fastening cells where backlash must remain under 1 arc-minute throughout service life.
- Preventive Maintenance & Overhaul — Scheduled joint rebuilds on IRB6700-150/200/235/300 variants to restore OEM performance without full robot replacement.
Technical Specifications
| ABB Part Number | 3HAC044841-001 |
| Cross-Reference | 3HAC043072-003 |
| Gearbox Type | RV Cycloidal (Nabtesco RV-550N) |
| Reduction Ratio | 252.33 : 1 |
| Compatible Robot | ABB IRB6700 Series (all variants) |
| Applicable Axes | Axis 1, Axis 2, Axis 3 (model-dependent) |
| Rated Output Torque | ≥ 5,390 N·m (refer to ABB service manual) |
| Backlash | < 1 arc-minute (new condition) |
| Lubrication | Grease-packed, sealed (Nabtesco RV grease) |
| Operating Temperature | -10 °C to +70 °C |
| Weight | ~300 g (unit only, excl. mounting hardware) |
| Condition | New / Surplus New / Refurbished (specify on inquiry) |
Why Engineers Specify This Model
- OEM-Matched Geometry — Direct bolt-on replacement; no machining or adapter plates required for IRB6700 joint housings.
- Cycloidal Architecture — RV-type gearboxes offer 3–5× higher shock-load capacity vs. harmonic drives, critical for heavy-payload crash recovery.
- Zero-Backlash Retention — Cycloidal tooth engagement maintains <1 arc-minute backlash across the full rated torque range, preserving TCP accuracy over millions of cycles.
- Sealed for Harsh Environments — IP-rated sealing resists coolant, weld spatter, and foundry particulate without additional guarding.
- Reduced Downtime — Stocking this part enables same-shift gearbox swap vs. 6–12 week OEM lead times, protecting production KPIs.
- Dual Part Number Coverage — Sourcing either 3HAC044841-001 or 3HAC043072-003 fulfills the same BOM position; we verify compatibility before shipment.
Complete System Bill of Materials
For a full IRB6700 joint rebuild or preventive maintenance kit, engineers typically source the following alongside this gearbox:
- ABB 3HAC044841-001 / 3HAC043072-003 — RV-550N-252.33 Reduction Gear (this item)
- ABB 3HAC026253-001 — Motor Unit, Axis 1/2
- ABB 3HAC044075-001 — Brake Unit
- ABB 3HAC044076-001 — Resolver / Encoder
- Nabtesco RV Grease (500 g) — Gearbox re-lubrication
- ABB Joint Seal Kit — O-rings and gaskets for housing reassembly
- ABB 3HAC044077-001 — Cable Harness, Axis 1
Contact us to quote a complete maintenance kit — we offer bundle pricing for multi-line orders.
Compliance & Industry Standards
- CE Marked — Compliant with EU Machinery Directive 2006/42/EC as an OEM replacement component.
- RoHS Compliant — Materials meet EU Directive 2011/65/EU restrictions on hazardous substances.
- ISO 9283 — Compatible robot (IRB6700) is tested to ISO 9283 manipulator performance standards; this gearbox maintains those specifications when installed per ABB service procedures.
- REACH Compliant — No SVHC substances above 0.1% w/w threshold.
- Export Classification — HS Code 8483.40 (Gears and gearing); export licensing requirements vary by destination — contact us for EAR/ECCN guidance.
Quality Assurance & Sourcing
At Konmask.com, every ABB spare part passes a documented 4-stage verification before dispatch:
- Part Number Verification — Physical label, engraving, and datamatrix code cross-checked against ABB’s official part number database.
- Dimensional Inspection — Mounting flange, shaft diameter, and bolt-circle dimensions measured against ABB engineering drawings.
- Backlash & Rotation Test — Manual rotation check for smooth cycloidal engagement; backlash measured with dial indicator.
- Packaging & Traceability — Sealed in anti-static, moisture-barrier packaging with lot number, inspection date, and inspector ID recorded.
We source from authorized ABB distributors, certified MRO suppliers, and verified OEM surplus channels. Counterfeit parts are rejected at intake — we do not list, sell, or ship non-genuine components.
How to Source This Part
- Add to Cart — For in-stock units, proceed directly to checkout. We accept T/T bank transfer, PayPal, and major credit cards.
- Request a Quote — For bulk orders (2+ units), refurbished options, or expedited shipping, email support@konmask.com with your required quantity and delivery timeline.
- Provide Robot Serial — Share your IRB6700 serial number for definitive compatibility confirmation before shipment.
- Lead Time — In-stock: ships within 2 business days. Out-of-stock: 3–6 weeks sourcing lead time. Express air freight available.
- Global Delivery — We ship to 60+ countries via DHL Express, FedEx International Priority, and sea freight for bulk orders. All shipments include commercial invoice, packing list, and certificate of origin.
Application-Specific FAQ
Q: Is 3HAC044841-001 the same as 3HAC043072-003?
A: Yes — ABB issued 3HAC043072-003 as the superseding part number for 3HAC044841-001. Both numbers reference the identical RV-550N-252.33 gearbox assembly. We verify the physical unit against both numbers before shipment.
Q: Which IRB6700 variants use this gearbox?
A: The RV-550N-252.33 is used in IRB6700-150/2.05, IRB6700-175/3.05, IRB6700-200/2.60, IRB6700-235/2.65, and IRB6700-300/2.70. Axis position varies by variant — provide your robot serial number for axis-specific confirmation.
Q: Can this gearbox be installed without ABB service tools?
A: ABB recommends using their dedicated joint assembly tooling (3HAC-TOOL-KIT-IRB6700) and following the IRB6700 Product Manual (3HAC043481-001). Konmask can supply the service manual on request.
Q: Do you offer exchange / core return programs?
A: Yes — for refurbished units, we offer a core exchange program. Ship your worn gearbox to our facility; receive a credit toward a remanufactured unit. Contact us for core return terms.
Q: What warranty is provided?
A: New surplus units carry a 12-month warranty against manufacturing defects. Refurbished units carry a 6-month warranty. Warranty is void if the unit shows evidence of improper installation or operation outside rated parameters.
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Contact: support@konmask.com | +0086 19859288691
