FANUM Machine Electrospindle Repair – HSD ES350L

Bybmsserwis

FANUM Machine Electrospindle Repair – HSD ES350L (36,000 rpm, HSK E40)

  • Spindle manufacturer: HSD

  • Machine: FANUM

  • Speed: 36,000 rpm

  • Taper HSK E40

An HSD ES350L electrospindle from a FANUM machine arrived at our service center. The unit reported increased noise and noticeable vibrations at higher speeds. These are classic symptoms of high-speed bearing wear and a weakened tool drawbar. In such cases, a rapid, precise repair is crucial because every hour of machine downtime means real production costs.

FANUM electrospindle repair – HSD ES350L, HSK E40, 36,000 rpm

Diagnostics
and condition verification of the HSD ES350L spindle

We began with full diagnostics:

  • runout measurement,
  • inspection of the HSK E40 taper condition,
  • clamping force test and vibration analysis across the full speed range up to 36,000 rpm.

We confirmed the need to replace specialist high-speed bearings, as well as to overhaul the drawbar (Belleville springs, gripper segments, guides and seals). We also checked the bearing seats.

Scope of work – in bullet points
HSD ES350L electrospindle repair

1. Disassembly of the electrospindle and cleaning
We disassemble the electrospindle on the service bench, clean all components and bearing seats, and remove contaminants. We inspect the HSK E40 taper and mating surfaces to prepare the unit for the next stages.
2. Replacement of specialist high-speed bearings
We select bearings designed for operation at 36,000 rpm, install them with the correct fits and preload, and apply appropriate lubrication. As a result, the spindle gains stability, quiet running and lower temperatures at high speeds.
3. Tool drawbar overhaul – HSK E40
We refurbish the gripping mechanism (incl. Belleville springs, gripper segments, guides and seals), clean and replace worn parts. Finally, we measure and calibrate the clamping force for the HSK E40 taper to ensure secure tool holding and machining repeatability.
4. Precision balancing
After assembly, we perform dynamic balancing of the electrospindle to a level appropriate for 36,000 rpm (our practice: accuracy class 0.4G). This minimizes vibration, improves running quality and extends bearing life.
5. Finally, we carried out a series of start-up and load tests
From low to maximum speeds, with monitoring of temperatures, vibrations and noise. The HSD ES350L spindle returned to parameters required for operation in FANUM machines, and the customer received a full service warranty together with measurement documentation and operating recommendations.
FANUM electrospindle repair – HSD ES350L, HSK E40, 36,000 rpm Complete repair of FANUM electrospindle – HSD ES350L, HSK E40, 36,000 rpm

BMS Spindle Service
Trusted HSD service for FANUM machines

If you’re looking for a proven partner for FANUM spindle overhauls or HSD electrospindle repairs — you’re in the right place.

BMS Spindle Service is a team that has been a leader in HSD electrospindle repairs in Poland and across Europe for years. Every year we service hundreds of units — from models used for wood and composites, to spindles operating in demanding CNC centers. We work fast (express options available) while ensuring full repeatability and process safety.

What you get
when you choose us for HSD ES350L repair

  • Replacement of specialist high-speed bearings matched to 36,000 rpm
  • Drawbar overhaul with clamping force measurement and calibration
  • Precision balancing for high-speed operation
  • Start-up and load tests across the full speed range
  • Full service warranty and a clear measurement report
  • Short lead times and support with spindle removal/installation in the FANUM machine
FANUM HSD ES350L electrospindle service – diagnostics, balancing, HSK E40 Dynamic balancing of FANUM HSD ES350L electrospindle – accuracy class 0.4G

Frequently asked questions
about HSD ES350L electrospindle service

Increased noise, noticeable vibration at high speeds, rising temperatures, reduced HSK E40 clamping force, marks on the workpiece surface or machine alarms. These are typical effects of high-speed bearing wear and/or a weakened drawbar.
  • Disassembly of the electrospindle and thorough cleaning.
  • Replacement of specialist high-speed bearings matched to 36,000 rpm.
  • Drawbar overhaul (refurbishment/replacement of parts + clamping force measurement and calibration).
  • Precision dynamic balancing for high-speed operation (our practice: 0.4G).
  • Start-up and load tests plus a measurement report.
We act quickly — after diagnostics we provide a lead time (express modes available). We support logistics for spindle transport and assist with removal/installation in the FANUM machine.
You receive a full service warranty, a measurement report (vibration, temperature, clamping force), balancing results and operating recommendations to maintain stability at 36,000 rpm.
We are a leader in HSD electrospindle repairs in Poland and across Europe and service hundreds of units annually, but we also work with other CNC spindle brands. We serve customers throughout Poland and across Europe.

Express HSD spindle repairs
are our everyday work

Need to restore your HSD ES350L electrospindle to full performance? Contact us — we’ll prepare a quote today, arrange safe transport and provide a fast, precise repair with warranty. Your FANUM machine will return to production quickly, giving you peace of mind and process stability.

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