Heavy-Payload Robot Counterbalance Solution — ABB IRB7600 Balancing Device | IRB7600 Series
Where This Product Is Used
The ABB IRB7600 Balancing Device (P/N: 3HAC037638-002 / 3HAC051384-003 / 3HAC048319-001) is a critical mechanical counterbalance assembly engineered for the ABB IRB7600 heavy-payload industrial robot series. It is deployed across the most demanding automation environments globally:
- Automotive Body-in-White (BIW) Lines — spot welding, press-tending, and heavy panel handling where axis 2 load compensation is essential for cycle-time accuracy.
- Foundry & Die-Casting Cells — high-temperature, high-vibration environments requiring robust spring-gas counterbalance mechanisms to maintain positional repeatability.
- Heavy Material Handling — palletizing, machine tending, and transfer operations with payloads up to 500 kg where unbalanced axis torque would accelerate servo wear.
- Aerospace & Defense Manufacturing — large-component assembly and drilling fixtures demanding sub-millimeter repeatability over extended duty cycles.
- Steel & Metal Fabrication — plasma cutting, laser cutting, and arc welding of structural steel where the IRB7600’s reach and payload capacity are leveraged at full extension.
Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | ABB Robotics |
| Compatible Robot | IRB7600 Series (all variants) |
| Part Numbers | 3HAC037638-002 / 3HAC051384-003 / 3HAC048319-001 |
| Assembly Type | Mechanical Balancing Device (Spring/Gas Counterbalance) |
| Axis | Axis 2 (Lower Arm Counterbalance) |
| Robot Payload Range | IRB7600 — 150 kg to 500 kg variants |
| Weight (Unit) | ~1,600 g (shipping weight) |
| Condition | New / Refurbished (specify on inquiry) |
| Lead Time | Contact for availability |
Why Engineers Specify This Model
- Axis 2 Torque Compensation: Offloads gravitational load from the servo motor and gearbox on the lower arm, directly extending gearbox service life and reducing unplanned downtime.
- OEM-Matched Performance: Designed to ABB’s original spring-rate and stroke specifications — no recalibration of motion parameters required after replacement.
- Multi-P/N Interchangeability: The three part numbers (3HAC037638-002, 3HAC051384-003, 3HAC048319-001) cover revision variants across IRB7600 production generations, ensuring backward compatibility.
- Reduced Servo Stress: Proper counterbalance reduces peak current draw on axis 2 drives, lowering heat generation and extending drive module MTBF.
- Safety-Critical Component: A failed or degraded balancing device can cause uncontrolled arm drop — replacement with OEM-spec parts is mandatory for safe operation.
Complete System Bill of Materials
When replacing or overhauling the IRB7600 axis 2 balancing system, engineers typically source the following alongside this unit:
- ABB IRB7600 Axis 2 Gearbox (3HAC028845-001 or equivalent)
- Axis 2 Motor (3HAC031683-001 or equivalent)
- Balancing Device Mounting Hardware / Pin Kit
- Sealing Kit & Lubricant Pack (per ABB maintenance schedule)
- ABB IRC5 Controller Drive Module (if servo fault is concurrent)
Contact Konmask.com to source complete BOM kits — we cross-reference part numbers across IRB7600 production revisions.
Compliance & Industry Standards
- ISO 10218-1:2011 — Robots and robotic devices: Safety requirements for industrial robots.
- IEC 62061 — Safety of machinery: Functional safety of safety-related control systems.
- CE Marking — ABB IRB7600 platform is CE-certified; OEM replacement parts maintain compliance when installed per ABB service documentation.
- RoHS Compliant — Mechanical assembly free of restricted hazardous substances per EU Directive 2011/65/EU.
Quality Assurance & Sourcing
Konmask.com sources ABB robot spare parts through verified industrial supply channels. Every unit undergoes the following before dispatch:
- Part number and revision verification against ABB documentation
- Physical inspection for mechanical integrity (spring tension, housing, pin bores)
- Packaging in anti-static, impact-resistant materials with full P/N labeling
- Traceability documentation available on request
We do not list parts we cannot verify. If stock is unavailable, we will advise lead time honestly rather than ship non-conforming substitutes.
How to Source This Part
- Submit an RFQ — Email support@konmask.com with your robot serial number and required P/N revision.
- Receive Quote & Lead Time — We confirm stock, condition (new/refurbished), and delivery timeline within 1 business day.
- Place Order — Secure checkout via this product page or via proforma invoice for B2B/corporate procurement.
- Receive & Install — Parts shipped with ABB reference documentation. Installation per ABB Product Manual 3HAC028284-001.
Application-Specific FAQ
Q: Are 3HAC037638-002, 3HAC051384-003, and 3HAC048319-001 interchangeable?
A: These three P/Ns represent revision variants of the IRB7600 balancing device across production generations. Compatibility depends on your robot’s serial number and build date. Contact us with your robot S/N for a definitive cross-reference.
Q: Can this balancing device be used on IRB7600-150, IRB7600-340, or IRB7600-500 variants?
A: The IRB7600 balancing device design is shared across payload variants of the IRB7600 platform, but spring-rate specifications may differ. Confirm your robot variant before ordering.
Q: What are the symptoms of a failing balancing device?
A: Common indicators include axis 2 position errors under load, abnormal servo current on axis 2, audible spring/gas leakage sounds, and visible mechanical play at the balancing device pivot points.
Q: Do you supply refurbished units?
A: Yes. Refurbished units are available at reduced cost and are inspected to the same standard as new stock. Specify your preference in the RFQ.
Q: What is the typical lead time?
A: In-stock units ship within 2–5 business days internationally. Out-of-stock items are sourced within 2–4 weeks depending on global supply. We provide honest lead times — no false promises.
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