CHIRON FZ 18 W Spindle Service – Full Warranty

Bybmsserwis

CHIRON FZ 18 W spindle service (SK40) – complete overhaul from removal to installation

  • Spindle manufacturer: CHIRON

  • Machine: CHIRON FZ 18 W

  • Taper: SK40

A spindle from the CHIRON FZ 18 W machining center arrived at our service. Two issues were reported: no tool clamping and a worn SK40 taper. This combination typically indicates wear of several components at once: the drawbar mechanism, bearings and the taper itself. We took over the entire process – from removing the spindle from the machine to reinstalling it in line with the CHIRON procedure. Thanks to this the customer has one point of contact, one report and full responsibility on our side.

CHIRON FZ 18 W spindle service – removal, overhaul and installation (SK40)

CHIRON spindle diagnostics
and action plan

After the initial on-machine check we confirmed no clamping and runout on the taper. Together with the client we agreed the scope:

  • overhaul and replacement of spindle bearings
  • SK40 taper restoration
  • drawbar (tool-clamping) restoration for SK40
  • and precision balancing of the entire assembly.

In addition, we implemented a package of post-installation tests so the customer received a spindle fully ready for production.

Service process
for the CHIRON FZ 18 W spindle

1. Spindle removal and cleaning
We performed the removal at the customer’s shop floor. We secured the CHIRON FZ 18 W, disconnected required media, documented the process, and prepared the spindle seat for reinstallation. This approach shortens downtime — the spindle quickly goes to us while the station stays ready for assembly.
2. Spindle bearings
Selection of class and preload for speeds and loads typical of the FZ 18 W; assembly in controlled conditions with correct preload and lubrication.
3. SK40 taper – restoration of the worn taper
Grinding of the taper surface, runout and contact-geometry checks. This restores repeatable clamping and visibly improves surface finish.
4. Tool clamping (SK40)
Inspection and restoration of the drawbar mechanism: disc springs, guides, sleeves, collet segments. After assembly we measured clamping force and calibrated it to the SK40 spec and the manufacturer’s recommendations.
5. Precision balancing – fewer vibrations, better quality
After assembly and preliminary tests the spindle went to the balancer. Precision balancing significantly reduces vibration, extending bearing life, improving surface finish and stability at higher speeds.
6. Spindle installation – according to CHIRON procedure
When the spindle passed the bench tests, we returned to the customer. Installation was carried out in accordance with the CHIRON procedure: clean seat, correct tightening torques, media connections, alignment check and leak test. We then ran on-machine tests: warm-up, vibration checks, temperature monitoring and clamping-force verification on a real SK40 tool. The customer received measurement reports and clear operating recommendations.
CHIRON FZ 18 W spindle refurbishment – bearing replacement, SK40 taper and drawbar restoration CHIRON FZ 18 W spindle service – removal and installation according to CHIRON procedure (SK40)

Spindle repair summary
CHIRON FZ 18 W

  • Scope of work: bearing replacement, SK40 taper restoration, drawbar restoration, precision balancing.
  • Overhaul flow: on-site removal → service at BMS → installation according to CHIRON → tests (warm-up, vibration, temperature).
  • Operational benefits: one report and schedule, shorter downtime, predictable lead times.
  • Reports: SK40 clamping-force measurement, balancing report, post-installation test results.
  • Effect on the machine: stable clamping, repeatable taper geometry, reduced vibration, better surfaces and longer tool life.
  • Safety: complete documentation + full warranty and fast technical support from BMS.

Frequently asked questions
about CHIRON FZ 18 W spindle service – SK40 taper

Lack of tool retention, errors during tool change, unusual sounds during clamping/release, poorer surface finish after machining and increased vibration.
Inspection and replacement of worn parts (incl. disc springs, guiding elements), cleaning, calibration and clamping-force measurement for the SK40 taper.
Yes. It ensures proper alignment, torque values and connections. It is key to quiet operation, low vibration and long bearing life.
Keep pockets and tools clean, monitor clamping force, do not ignore rising vibration. A regular inspection significantly reduces the risk.

Comprehensive spindle overhaul
CHIRON FZ 18 W

Does your CHIRON spindle need attention? We take full responsibility for the process — from diagnostics and removal, through repair, to reinstallation with measurement reports (including clamping force). Please contact us; we will present the schedule and terms of execution.

CHIRON FZ 18 W spindle repair – removal and installation according to CHIRON procedure (SK40)

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