YASKAWA HW0388706-A HW0388708-A HW0388710-A Robot Reducer – Obsolete Yaskawa Spare Part

Technical Dossier

Product Details And Specifications

YASKAWA HW0388706-A HW0388708-A HW0388710-A Robot Reducer – Obsolete Yaskawa Spare Part

DriveKNMS reviews sourcing options for this model through RFQ handling before quotation.

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Note: Axis-specific torque ratings, gear ratios, and mounting dimensions vary by sub-part number (706-A / 708-A / 710-A). Confirm your robot model and axis position before ordering. We do not publish unverified electrical or mechanical parameters.

Solving the Discontinued Hardware Crisis

Yaskawa's Motoman robot lineup has served automotive, electronics, and general manufacturing facilities for decades. The reducers in these joints are high-precision, high-load components — and they are not interchangeable with current-generation equivalents without mechanical modification and re-calibration.

When a facility faces reducer failure on a legacy Motoman arm, the realistic options narrow quickly: source the original part, or commit to a full robot replacement program. The latter is not simply a procurement decision. It involves cell redesign, fixture modification, updated safety fencing, new programming, and operator retraining. Conservative estimates for a single robot cell replacement — including all associated engineering — routinely land between $150,000 and $400,000 USD, and that figure does not account for the production revenue lost during the transition period.

The HW0388706-A, HW0388708-A, and HW0388710-A are among the reducer assemblies most frequently requested by maintenance teams managing aging Yaskawa installations. Their availability on the open market is limited and declining. Each unit that leaves the secondary market is one fewer option for the next facility that needs one.

Extending Automation Asset Life by 5–10 Years: A Maintenance Strategy for Plant Management

For plant managers facing pressure to justify capital expenditure deferrals, the argument for legacy robot maintenance is straightforward when the numbers are laid out correctly.

A well-maintained Yaskawa Motoman robot arm has a mechanical service life that extends well beyond its nominal design cycle, provided that wear components — reducers, bearings, wrist assemblies — are replaced on schedule. The control system, teach pendant, and servo drives are separate concerns, but the mechanical structure itself is durable. Facilities that have implemented proactive reducer replacement programs report robot service extensions of 7–12 years beyond the point at which the OEM ceased support.

DriveKNMS supports this strategy by providing access to verified obsolete spare parts — including reducer assemblies — that are no longer available through standard distribution. Our inventory is sourced, inspected, and documented to support maintenance programs that cannot afford uncertainty.

Condition & Reliability Assurance

Obsolete mechanical components sourced from the secondary market carry inherent risk if they are not properly evaluated before installation. DriveKNMS applies a five-stage inspection protocol to all reducer units before they are offered for sale:

1. Visual and Structural Inspection: External housing examined for impact damage, corrosion, and seal integrity. Units with compromised housings are rejected at intake.

Q: How are RFQ terms confirmed?
A: Quantity, required condition, documentation needs, destination and sourcing route are confirmed during RFQ review before quotation.

3. Seal and Lubrication Verification: Output seals inspected for hardening, cracking, or extrusion. Lubricant condition assessed where accessible. Units requiring re-greasing are serviced with manufacturer-specified compounds.

4. Mounting Interface Inspection: Input and output flanges checked for thread condition, flatness, and absence of fretting corrosion. Pin and bolt hole conditions verified against specification.

Units that do not pass all five stages are not offered for sale. There are no exceptions to this protocol.

Key Features for System Maintenance

Direct mechanical replacement: The HW0388706-A, HW0388708-A, and HW0388710-A are OEM assemblies. They install into the original mounting positions without modification to the robot structure.

Avoids engineering reconstruction costs: Unlike a robot replacement program, a reducer swap does not trigger cell redesign, fixture re-qualification, or safety system re-validation. The scope of work is contained to the mechanical replacement and mastering procedure.

Supports fleet standardization: For facilities operating multiple Motoman arms of the same model, maintaining a shared reducer inventory reduces per-unit spare cost and simplifies maintenance scheduling.

Q: How is condition confirmed before quotation?
A: Available condition, photos, test records and documentation are checked according to the requested model and sourcing channel before a formal RFQ response.

Can you source other Yaskawa obsolete parts?
Yes. DriveKNMS specializes in hard-to-find and obsolete industrial automation components across multiple brands. Contact us with your part number and we will advise on availability.