---
title: Parts Inventory
description: We repair DC and AC servo motors, CNC systems, and DC power supplies, offer replacements for obsolete servo motors, and retrofit CNC machines.
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---

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  ![](https://www.potomacelectric.com/repairs/images/design/smallimagesstrip.jpg)





 

# Parts inventory

 | **SEM** / BRUSH (DC) MOTORS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **MT30M4-38** |  |  |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **REFURBISHED** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** <br/><span style="font-weight:bold;color:#a00;">For Bridgeport motor repair and replacement, click <a href="/repairs/bridgeport.html" target=new>here</a></span> | **SC:** 1 |

 | **SEM** / BRUSH (DC) MOTORS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **MT30R4-37** |  |  |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **REFURBISHED** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** <br/><span style="font-weight:bold;color:#a00;">For Bridgeport motor repair and replacement, click <a href="/repairs/bridgeport.html" target=new>here</a></span> | **SC:** 1 |

 | **SEM** / BRUSH (DC) MOTORS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **MT30R4-42** |  |  |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **REFURBISHED** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** <br/><span style="font-weight:bold;color:#a00;">For Bridgeport motor repair and replacement, click <a href="/repairs/bridgeport.html" target=new>here</a></span> | **SC:** 1 |

 | **SEM** / BRUSH (DC) MOTORS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **MT30R4-46** |  |  |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **REFURBISHED** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** <br/><span style="font-weight:bold;color:#a00;">For Bridgeport repair and replacement, click <a href="/repairs/aftermarket-replacements/by-industry/machine-tools/56-bridgeport.html" target=new>here | **SC:** 1 |

 | **SEM** / BRUSH (DC) MOTORS | **Price: $500.00** |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **MT30U4-36M54A50** | **N/A** | **N/A** |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **New** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** 0.625' shaft/keyway, 7V tach <br/><span style="font-weight:bold;color:#a00;">For Bridgeport motor repair and replacement, click <a href="/repairs/bridgeport.html" target=new>here</a></span> | **SC:** 1 |

 | **SEM** / BRUSH (DC) MOTORS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **MT30U4-42** |  |  |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **REFURBISHED** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** <br/><span style="font-weight:bold;color:#a00;">For Bridgeport motor repair and replacement, click <a href="/repairs/bridgeport.html" target=new>here</a></span> | **SC:** 1 |

 | **SEM** / BRUSH (DC) MOTORS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **MT40P4-61** | **N/A** | **N/A** |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **New** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** 0.75' shaft/keyway, 7V tach <br/><span style="font-weight:bold;color:#a00;">For Bridgeport motor repair and replacement, click <a href="/repairs/bridgeport.html" target=new>here</a></span> | **SC:** 1 |

 | **SEM** / BRUSH (DC) MOTORS | **Price: $1200.00** |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **MT40W4-45** | **MT40W4-45** | **N/A** |
| Datasheet: N/A | Quantity: **2** | Condition: **New** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** 0.875' shaft/keyway, 7V TACH, 75 in-lb <br/><span style="font-weight:bold;color:#a00;">For Bridgeport motor repair and replacement, click <a href="/repairs/bridgeport.html" target=new>here</a></span> | **SC:** 1 |

 | **SEM** / BRUSH (DC) MOTORS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **MTS30F4-25** | **N/A** | **N/A** |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **New** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** 0.625' shaft <br/><span style="font-weight:bold;color:#a00;">For Bridgeport motor repair and replacement, click <a href="/repairs/bridgeport.html" target=new>here</a></span> | **SC:** 1 |

 | **SEM** / BRUSH (DC) MOTORS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **MTS30M4-38** | **N/A** | **N/A** |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **New** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** 0.625' shaft/keyway, 7V tach <br/><span style="font-weight:bold;color:#a00;">For Bridgeport motor repair and replacement, click <a href="/repairs/bridgeport.html" target=new>here</a></span> | **SC:** 1 |

 | **SEM** / BRUSH (DC) MOTORS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **MTS30U4-26** |  |  |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **REFURBISHED** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** <br/><span style="font-weight:bold;color:#a00;">For Bridgeport motor repair and replacement, click <a href="/repairs/bridgeport.html" target=new>here</a></span> | **SC:** 1 |

 | **SEM** / BRUSH (DC) MOTORS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **MTS30U4-36** |  |  |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **REFURBISHED** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** <br/><span style="font-weight:bold;color:#a00;">For Bridgeport motor repair and replacement, click <a href="/repairs/bridgeport.html" target=new>here</a></span> | **SC:** 1 |

 | **SERVODYNAMICS** / BRUSH (DC) AMPLIFIERS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **SD1525-10-4** |  |  |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **REFURBISHED** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** | **SC:** 1 |

 | **SERVODYNAMICS** / BRUSH (DC) AMPLIFIERS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **SD3060-16** |  |  |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **REFURBISHED** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** | **SC:** 1 |

 | **SERVODYNAMICS** / BRUSH (DC) AMPLIFIERS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **SD4-3060-16** |  |  |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **REFURBISHED** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** | **SC:** 1 |

 | **SERVODYNAMICS** / BRUSH (DC) AMPLIFIERS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **SDF1020-14-88A** |  |  |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **REFURBISHED** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** | **SC:** 1 |

 | **SERVODYNAMICS** / BRUSH (DC) AMPLIFIERS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **SDFO-1520-17** |  |  |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **REFURBISHED** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** | **SC:** 1 |

 | **SERVODYNAMICS** / BRUSH (DC) AMPLIFIERS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **SDFO1520-17-110** |  |  |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: |
| Used on the machine built by: **N/A** | no image |
| **Notes:** | **SC:** 1 |

 | **SERVODYNAMICS** / BRUSH (DC) AMPLIFIERS |  |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
| **SDFP1525-17-185** |  |  |
| Datasheet: N/A | **Out of stock. [Contact us for repair](https://www.potomacelectric.com/repairs/./inquires/)** | Condition: **REFURBISHED** |
| Used on the machine built by: **N/A** | no image |
| **Notes:** | **SC:** 1 |

 | **SEW EURODRIVE** / GEARBOXES | **Price: $559.00** |
|---|---|
| OEM part number | OEM model/series | Machine builder part number |
|  | **FA77DT100L4BMG2HRTHIS** |  |
| Datasheet: N/A | Quantity: **1** | Condition: **New** |
| Used on the machine built by: | no image |
| **Notes:** | **SC:** 6 |