We rebuild all makes and models of spindles. That sentence is the short version of this page. The longer version is what changes from one machine brand to the next when a spindle comes in for CNC spindle repair, and what never does.
What changes by OEM
Drive design. Machine builders make different choices: belt-driven spindles, gear-driven spindles, direct-coupled units, and motorized spindles with the motor built into the cartridge. Each design fails differently and comes apart differently. The spindle types guide covers this in depth.
Tool interface. CAT, ISO, HSK, JARNO, and lathe nose interfaces are all checked during inspection for size, gage line, and runout. The interface on your spindle determines the gaging used and what you include in the shipment: your tool holder with retention knob and your drawbar for a milling spindle; neither is needed for a lathe or grinding spindle.
Electronics and feedback. Encoders, proximity switches, and integral motor windings vary by builder and by model year. All three are tested during inspection, because a fault that looks mechanical is sometimes electrical, and the reverse.
Design itself. Some failures trace back to the OEM’s own design. MZI has documented investigations where the root cause was a design defect rather than wear, and where the fix was an engineered improvement instead of a like-for-like parts swap. Two of those investigations are written up in the failure analysis guide.
What stays the same
The process. Whatever the badge on the machine, every spindle goes through the same sequence: received and tracked by serial number, disassembled with photo documentation, failure-analyzed, every part cleaned and measured in the inspection room, quoted line by line, with no charge for any of it until your purchase order approves the rebuild. The rebuild process guide walks through all of it.
Guides by brand
Brand-specific guides are published as they are completed, starting with Haas spindle repair. Rebuild service pages for individual brands are on the OEMs Rebuilt section, and the Brands We Rebuild reference lists the makes we take in. If your brand is not listed anywhere on this site, call anyway; the list describes what we see most, not the limit of what we rebuild.
Before you send a spindle in
- Note the machine brand and model, and the spindle’s serial number if accessible.
- Note what changed (sound, finish, runout, a crash or tool break) and when.
- Call (714) 379-6505 first. Some problems can be diagnosed with a little information over the phone, and a few do not require removing the spindle at all.
- When it does need to come in, the shipping guide covers the request form, what goes in the box, and where to send it.
Start with a phone call
Edward Zitney
President
(714) 475-4016
He has spent more than 44 years in spindle rebuilding and remanufacturing. He learned the trade over more than two decades at Precision Balancing & Analyzing, the shop long regarded in the industry as the standard for spindle work, later oversaw SKF Machine Tool Services, held service leadership roles at Setco, and wrote a published column on spindle remanufacturing for Fabricating & Metalworking.
Marco Guerrero
Partner
(949) 374-0060
He came up on the shop side of this industry. He started with his hands, welding and fabricating for the racing industry, then spent fifteen years as general manager growing a machining job shop, the same kind of shop that sends MZI spindles today. He has sold CNC machines too, so he knows what new equipment costs and when a rebuild is the smarter call. Today he and Ed are partners in MZI Precision, and his standard is simple: every customer feels informed and supported from the first call to the day the spindle ships back.
Call (714) 379-6505 and describe what changed. With a little information about your spindle we can diagnose the problem and determine your best action.
What to expect on the call:
- You talk directly with a spindle expert.
- Some problems can be diagnosed over the phone, and a few do not require removing the spindle at all.
- If your spindle should come in: disassembly, inspection, failure analysis, and a line-item quote, at no charge until your purchase order approves the rebuild.