Spindle Repair & Rebuild for San Diego-Area Manufacturers
Since 1986, HST has rebuilt precision machine-tool spindles to OEM specification — 100,000+ repairs and counting. Ship your mechanical or air-bearing spindle to our shop and get it back in production — fast, warrantied, and done right.
Spindle demand across San Diego's defense manufacturing base
San Diego is the most defense-dense precision-machining market on the West Coast — defense is roughly a quarter of regional output, anchored by Naval Base San Diego and a prime-contractor cluster (General Atomics, Northrop Grumman, Raytheon) that drives constant ITAR/AS9100-certified CNC demand. The primes keep spindle repair in-house.
The standout is General Atomics' UAV supply chain — titanium and composite airframe machining across the Poway–Santee–Escondido corridor runs spindles at some of the hardest duty cycles in the region, and cross-border pressure pushes surviving local shops toward exactly the high-complexity, ITAR-restricted work that wears spindles fastest. They rely on specialists like HST for OEM-spec quality and turnaround. Around San Diego, shops that fit this profile include Darmark Corporation, G.V. Industries, C&H Machine & EDM Services, QCMI, and Stines Machine.
Mechanical and air-bearing spindle repair — for shops near and far
HST has rebuilt machine-tool spindles to OEM specification since 1986 — for shops down the road and across the country. As an ISO 9001-certified shop with a class-10,000 clean room, we take on both everyday mechanical spindles and the air-bearing and super-precision work most repair houses turn away.
Mechanical spindles run the CNC machining centers, lathes, and mills on most shop floors; their bearings carry heavy cutting loads at high duty cycles until wear, heat, or a crash pulls them out of tolerance. Air-bearing spindles are a different animal — a film of pressurized air, not ball bearings, supports the shaft, delivering the sub-micron accuracy that semiconductor, wafer, and precision-grinding work demand. Most shops can't service them at all.
HST rebuilds both to running accuracy. As a Certified Big Plus repair facility, authorized for CAPTO clamping systems, and the authorized sales and service representative for Renaud spindles, every rebuild is bench-tested, backed by a warranty, and returned on a turnaround measured in days, not weeks.
Serving the San Diego area and the surrounding region
HST supports manufacturers across the San Diego area and the surrounding region — not only the city center.
Communities we serve in the region include Carlsbad, Chula Vista, Escondido, Oceanside, Vista, San Marcos, Poway, and El Cajon — throughout San Diego County.
What we repair
Mechanical Spindles →
Teardown, bearing replacement, and rebuild to OEM spec for CNC machining centers and lathes.
Air-Bearing Spindles →
High-precision air-bearing service most shops can't touch — restored to running accuracy.
Failure Analysis
Root-cause vibration, runout, and bearing analysis with a documented repair recommendation.
Bearing Replacement
Matched sets with correct preload to restore rated speed, accuracy, and tool life.
Balancing & Runout
Dynamic balancing to eliminate vibration and improve surface finish.
Rush Repair
Expedited turnaround for production-down situations.
Why manufacturers choose HST
Since 1986 · 100,000+ repairs
Depth no competitor can fake — built on decades of documented spindle work.
OEM-trained technicians
Rebuilt to original manufacturer specification, not "close enough."
Warranty + test data
Every rebuild is bench-tested and backed by a warranty.
Get your San Diego-area spindle back in production
Send us the make, model, and symptoms and we'll give you a free estimate and turnaround time.
San Diego-area spindle repair: common questions
Do I have to bring my spindle to New Hampshire?
No. Most San Diego-area customers ship their spindle to us. We guide inbound logistics and return it rebuilt and tested.
How fast is turnaround?
Standard rebuilds run on a set schedule; rush service is available for production-down situations. We confirm timing with your estimate.
Which spindle brands do you repair?
Every major brand — Mazak, Okuma, Mori Seiki, Fanuc, HSD, Disco, and more — across mechanical and air-bearing types.
Is the rebuild warrantied?
Yes. Every spindle is rebuilt to OEM specification, bench-tested, and backed by a warranty.