Signs of a Worn Mazak Spindle
Increased vibration points to worn bearings in a Mazak spindle. Modern controls carry vibration sensors that alarm on unsafe vibration, and Mazak warns that those alarms often get ignored. Worn bearings left in service can scorch spindle shafts and cause spindles to seize. A bearing change at the first sign of excessive vibration avoids both repairs.
Spring force in the drawbar holds toolholders in place. A drop in that spring force can cause tool vibration and runout that damage workpieces and the spindle.
Mazak Spindle Repair Shops
Global CNC Machine Services
Moraine, OH
Brands: Mazak
HS Spindles
Yorba Linda, CA
Brands: Mazak
Machine Tool Science
Gaffney, SC
Brands: DMG Mori, Fanuc, Haas, Mazak, Okuma
Motor City Spindle Repair
Dearborn, MI
Brands: DMG Mori, Fanuc, Haas, Makino, Mazak, Okuma
Setco
Hebron, KY
Brands: DMG Mori, Makino, Mazak, Okuma
Superior Spindle
Taylor, MI
Brands: DMG Mori, Makino, Mazak, Okuma
Compare Mazak Spindle Repair Shops
This table lists turnaround, warranty, and evaluation terms from each shop's published information.
| Shop | Repair type | Turnaround (business days) | Warranty (months) | Free evaluation | Rush service |
|---|---|---|---|---|---|
| HS Spindles | Ship-in repair | 10-15 | Not listed | Not listed | Yes |
| Motor City Spindle Repair | Ship-in repair | 5-15 | 12 | Yes | Yes |
| Superior Spindle | Ship-in repair | 10-14 | Not listed | Not listed | Yes |
Runout and Drawbar Checks
Mazak calls for a runout check with a ground and calibrated spindle test bar every six months and after any crash. Many shops skip the runout test after a minor crash. On turning machines an indicator checks the spindle shaft. A drawbar pull force test measures the spring force that holds the toolholder.
Lubrication, Cooling, and Covers
Spindles that are factory lubricated for life come sealed and need almost no maintenance. Larger headstocks such as those on big turning machines run their bearings in oil baths whose levels need periodic checks. Air/oil spindles need regular air intake filter changes. Headstocks lubricated by oil alone need full oil changes.
High-speed spindles with cooling systems depend on chiller units that run properly. A rise in chiller output temperature can signal a spindle problem. Covers and gaskets removed during maintenance go back on so contaminants stay out of the spindle and spindle motor.
Steps in a Mazak Factory Rebuild
Mazak’s spindle rebuild department disassembles, cleans, and inspects each spindle and runs a failure analysis to find the root cause. Critical components get precision ground and lapped for flatness and size within two microns. The spindle gets gauged and tested at each stage for axial displacement, internal pressure, load settings, tool clamp force, and runout.
Cartridges get balanced to within 0.5 grams to reduce vibration. A 12-hour progressive runoff works in the bearings and monitors temperature. Mazak measures bearing temperatures and runs vibration analysis benchmarking during that runoff.