Bosch SM 10/20-TA 055128-111 Servo Module – Obsolete Spare Part

Technical Dossier

Product Details And Specifications

Bosch SM 10/20-TA 055128-111 Servo Module – Obsolete Spare Part

When a Bosch SM 10/20-TA servo module fails on your production line, the clock starts immediately. This unit has been discontinued by Bosch for years, and standard procurement channels will not help you. The alternative — a full CNC control system upgrade compatible with modern servo drives — carries engineering costs, line downtime, and revalidation expenses that routinely exceed $500,000 USD per axis group. For multi-axis machining centers built around the Bosch CC220 or CC300 platform, total migration costs can reach into the millions.

DriveKNMS maintains verified physical stock of the SM 10/20-TA (Part No. 055128-111). This is not a lead-time quote. This is confirmed, inspected inventory available for immediate shipment.

Technical Specifications

Note: Electrical parameters such as rated current and bus voltage are not published here to prevent misapplication. Please confirm your system configuration with our technical team before ordering.

Solving the Discontinued Hardware Crisis

The Bosch SM 10/20-TA was a core axis drive module in Bosch's legacy CNC servo architecture, designed to work in tight integration with the CC220 and CC300 numerical controllers. These systems were installed across precision machining, automotive component manufacturing, and aerospace tooling facilities throughout the 1980s and 1990s.

Bosch ceased production and OEM support for this series well over a decade ago. The problem facing plant managers today is not simply finding a part — it is the structural reality that no modern servo drive is a direct electrical and mechanical substitute. Replacing the SM 10/20-TA with a current-generation drive requires new cabling, new feedback interface cards, new parameter commissioning, and in most cases, a full re-certification of the machine tool. That process takes months and costs that no maintenance budget absorbs quietly.

The only rational path to protecting a functioning Bosch CC220 or CC300 installation is to maintain a verified spare of the exact module. One confirmed unit on the shelf converts a potential six-figure production crisis into a scheduled maintenance event. DriveKNMS sources, inspects, and holds this inventory specifically for facilities that have made the deliberate decision to extend the service life of their existing automation assets rather than absorb the cost of forced modernization.

For plant managers under pressure from corporate to defer capital expenditure, a documented spare parts strategy built around verified obsolete inventory is a defensible, auditable position. The SM 10/20-TA in stock at DriveKNMS represents exactly that option.

Condition & Reliability Assurance

Every SM 10/20-TA unit that leaves DriveKNMS has passed a structured 5-step inspection protocol developed specifically for legacy servo hardware:

• Step 1 – Electrolytic Capacitor Assessment: All electrolytic capacitors are inspected for bulging, leakage, and ESR degradation. Units with capacitors showing age-related failure indicators are either recapped with equivalent-spec components or rejected from inventory.
• Step 2 – Firmware Version Verification: The onboard firmware version is confirmed and documented. Compatibility with the target CC220 or CC300 controller version is verified before shipment.
• Step 3 – Pin and Connector Inspection: All edge connectors and pin headers are examined under magnification for oxidation, corrosion, and mechanical deformation. Affected contacts are cleaned or the unit is rejected.
• Step 4 – Board-Level Visual Inspection: PCB traces, solder joints, and passive components are inspected for cold joints, cracking, and heat damage consistent with prior overcurrent events.
• Step 5 – Functional Verification (where test equipment permits): Units are bench-tested against known-good reference configurations where our test infrastructure supports the specific module variant.

Units that do not pass all applicable steps are not sold as functional spares. Condition grade is documented and disclosed at point of sale.

Key Features for System Maintenance

• Drop-in replacement: The SM 10/20-TA installs directly into the existing Bosch servo rack without mechanical modification.
• No reprogramming required: Axis parameters remain stored in the CC220/CC300 controller. Module swap does not require re-commissioning of servo parameters under standard replacement conditions.
• No engineering reconstruction: Unlike a drive migration project, replacing a like-for-like SM 10/20-TA avoids the need for new wiring schematics, interface card changes, or machine re-certification.
• Immediate operational restoration: A verified spare on hand converts an unplanned failure into a planned swap, measured in hours rather than weeks.
• Asset life extension of 5–10 years: A single confirmed spare, combined with a documented preventive maintenance schedule, is a realistic basis for extending the productive service life of a Bosch CC220/CC300 machining center by five to ten years — deferring capital replacement costs that are difficult to justify in the current industrial investment environment.

FAQ

Q: What warranty applies to an obsolete part like the SM 10/20-TA?
A: DriveKNMS provides a 90-day functional warranty on all inspected units. Warranty terms are confirmed in writing at point of sale. Extended coverage options are available — contact us to discuss.

Q: How do I know the unit is genuine and not a counterfeit?
A: All units are sourced from documented industrial decommissions or authorized surplus channels. Bosch part number, date codes, and board markings are verified against known-authentic references. We do not source from unverified secondary markets.

Q: Should I buy more than one unit as a long-term reserve?
A: For any facility running more than one axis on a Bosch CC220 or CC300 platform, holding a minimum of two SM 10/20-TA units is a defensible maintenance position. Global stock of this module is finite and continues to decline. Procurement becomes progressively more difficult and expensive each year. If your production schedule cannot tolerate a multi-week servo failure, the cost of a second spare is not a discretionary expense.

Q: Can you source specific firmware versions?
A: We document firmware versions on all units in stock. If your controller requires a specific firmware revision for compatibility, contact us with your CC220/CC300 software version and we will confirm compatibility before shipment.

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