Spindle Repair & Rebuild for Boston-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 needs across Greater Boston's industries
Greater Boston packs medical device, life sciences, semiconductor equipment, and defense electronics into one metro. The marquee names anchor it — Raytheon's Andover GaN foundry, Analog Devices' RF and phased-array work in Chelmsford, GE Aerospace's Lynn engine plant, Boston Scientific, and Draper. Manufacturers that size usually keep spindle repair in-house — when a spindle goes down the line stops, and at that scale the urgency justifies a full-time rebuild bench on staff.
Far more numerous are the small and mid-size contract manufacturers and precision job shops along the Route 128 and I-495 corridors — running the same high-speed, high-cycle spindles, but unable to justify a dedicated rebuild bench. They rely on specialists like HST for the experience, OEM-spec quality, and turnaround they'd otherwise wait weeks for. In and around Boston, shops that fit this profile include Innovent Technologies (Peabody), MK Services Corp. (Middleton), P&L Machine (Littleton), CR Machine Co. (Billerica), and AMI Machining (Middleboro).
Mechanical and air-bearing spindle repair — for shops near and far
Since 1986, HST has rebuilt precision machine-tool spindles for manufacturers across the country and around the world — mechanical and air-bearing alike, to OEM specification. We're an ISO 9001-certified shop running a class-10,000 clean room built for the air-bearing and super-precision work most repair houses can't touch.
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 dicing, wafer processing, and precision grinding 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 Boston area and the surrounding region
HST supports manufacturers across the Boston area and the surrounding region — not only the city center.
Communities we serve in the region include Cambridge, Lowell, Waltham, Quincy, Framingham, Worcester, Brockton, and Lynn — across Suffolk, Middlesex, Norfolk, Essex, and Worcester counties.
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 nearly four 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 Boston-area spindle back in production
Send us the make, model, and symptoms and we'll give you a free estimate and turnaround time.
Boston-area spindle repair: common questions
Do I have to bring my spindle to New Hampshire?
No. Most Boston-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.