ES 
DE 
FR 
IT 
Siemens SIMOTICS M: spindle motors 1PH4, 1PH6, 1PH7 and 1PH8
1PH series motors are Siemens motors for main spindles and power drives: lathes, machining centres, but also printing, paper, extrusion machines and winders. Today they are part of the SIMOTICS M range.
The E-Repair catalogue covers about 27 part numbers of 1PH motors and related accessories.
⚙️ Series in the catalogue
| Series | Features | Part numbers |
| 1PH4 | Water-cooled AC spindle motors, for 600 V DC link, for example 15 kW and 46 kW | 2 |
| 1PH6 | AC spindle motors with separate ventilation, for example 9 kW | 2 |
| 1PH7 | SIMOTICS M compact asynchronous motors, for example from 5.5 kW to 37 kW; encoder kits | 12 |
| 1PH8 | SIMOTICS M compact motors, asynchronous and synchronous, for example from 2.8 kW to 74 kW; spare fans | 11 |
👉 1PH4167-4NF26-Z – 46 kW water-cooled spindle motor
👉 1PH7131-2HF03-0BA3 – SIMOTICS M 1PH7 11 kW
👉 1PH8137-2FL12-0BA1 – SIMOTICS M 1PH8 synchronous 48.4 kW
👉 Search the catalogue: 1PH4 · 1PH6 · 1PH7 · 1PH8
⚠️ Typical faults
- worn bearings, with noise, vibration and overheating
- faulty encoders or speed sensors
- windings damaged by overloads or coolant ingress
- inefficient fans or water cooling circuits
Many apparently electrical faults actually depend on the encoder or the bearings: a complete diagnosis avoids unnecessary replacements.
🛠️ E-Repair services for SIMOTICS M 1PH motors
As Approved Partner Siemens – Industry Services, E-Repair supports production continuity:
🔧 Component-level repair in E-Repair's certified in-house laboratory, with diagnosis and repair where technically feasible.
♻️ Refurbishment with replacement of components subject to ageing and functional testing according to the agreed scope of work.
🚚 Advance replacement with a refurbished or new product, if available in stock and after a compatibility check.
🛠️ On-site and remote technical assistance for diagnosis and recommissioning.
✅ Standard 12-month warranty on the services for which it applies, extendable up to 24 months under the applicable conditions.
❓ Frequently asked questions
✔️ Can a spindle motor be repaired?
Yes, in most cases: bearings, encoders, fans and, when necessary, windings. E-Repair assesses the repair after diagnosis.
✔️ Is recommissioning needed after replacing the encoder?
Often yes, in particular for synchronous motors: the rotor position must be checked with the drive.
✔️ What is needed for the diagnosis?
The full part number from the motor rating plate, the connected drive and a description of the fault.
📚 Further reading
👉 SIMOTICS range · 👉 SIMOTICS S 1FK6 and 1FK7 · 👉 SIMODRIVE 611 · 👉 SINAMICS S120 motor modules
ℹ️ The information provided is general and indicative. Before purchase, installation or commissioning, check the data against the official Siemens documentation or contact E-Repair.
