A grinding spindle earns its keep in the last tenths. Surface finish and size on a ground part trace straight back to the condition of the spindle turning the wheel, which is why a grinding spindle that has started to drift, chatter, or run hot deserves attention before it starts signing its name on your parts.
Precision is the whole job
Grinding work is where our inspection standards matter most. In the clean inspection room, shaft bearing journals and the drawbar bore are checked for runout with indicators reading to fifty millionths of an inch, housing bores are checked for size, alignment, and shoulder squareness, and bearing spacers are checked for parallelism and flatness. On a grinding spindle there is nowhere for a marginal measurement to hide, because the wheel will report it on the very first part.
Balance gets the same weight. Every spindle we rebuild is run, tested, and dynamically balanced before it ships, and on grinding spindles that step is doing the most work. The balancing guide covers why, and our dynamic balancing service handles balance work in its own right.
The shipment is simpler than you think
Here is one detail that surprises shops: a grinding spindle shipment does not need to include a tool holder or drawbar. Those items matter for milling spindles, where the tool interface and drawbar are checked as a system; grinding spindles skip them. Fill out the request form, pack the spindle, and send it. The shipping guide has the full checklist.
Rebuilds and new builds
MZI rebuilds grinding spindles across makes and models, and builds new ones where that is the better answer. One customer put it plainly in a testimonial on our site: “We’ve had MZI build 3 deep hole spindles. They are perfect and flawless.” When a grinding spindle is obsolete or the design itself is the limitation, new and custom spindles are part of the same conversation, and the disassembly, inspection, and quotation that inform it cost you nothing until a purchase order approves the work.
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.