CNC Brand Profile

Hardinge and the Collet That Built American Precision | CNC Brand Profile

Most machine tool brands are known for one kind of machine. Hardinge is known for an idea: precision so repeatable a shop can trust it without measuring every part. That idea started with a collet, the 5C that Hardinge invented in 1901 and that is still the most common collet in the world, and it runs through everything the company built after: Super-Precision lathes that hold roundness in millionths, the Bridgeport knee mill that taught generations of machinists, and a stable of Swiss precision grinders. Few names carry that much of American manufacturing history.

This is a profile of the brand for the person who runs the iron or is about to buy it used: where Hardinge comes from, what it actually builds, why the spindle and the collet are the whole argument, and why a used Hardinge holds its value the way it does.

From a Chicago Watch Shop to Elmira, New York

Hardinge was founded in 1890 in Chicago by brothers Franklin and Henry Hardinge, building watchmakers' tools and foot-powered precision lathes for an industry that measured in fractions of a hair. In 1901 the company introduced the 5C collet, a workholding standard so good it never went away, and Hardinge remains the world's largest collet manufacturer to this day. In 1931 the company moved to Elmira, New York, where it has anchored American precision machine tool manufacturing ever since.

From that base Hardinge grew by adding the best precision names it could find. It acquired the Swiss grinder builder Kellenberger in 1995, bought Bridgeport in 2004, added Jones and Shipman from the UK in 2010, and gathered Hauser jig grinders, Tschudin centerless grinders, Voumard internal grinders, Usach production grinders, and the Forkardt workholding group along the way. The result was a portfolio that spanned sub-micron Super-Precision turning, the most common knee mill in history, and the reference machines in several grinding categories.

The recent chapter matters for a used buyer, so it is worth stating plainly. In July 2024 Hardinge filed for Chapter 11, and in September 2024 affiliates of Centre Lane Partners acquired substantially all of the assets. The machine tool business now operates as Kellenberger and the workholding business as Forkardt Hardinge, both led by former Hardinge leadership and both still building and supporting machines at Elmira, in Switzerland, and at Elgin, Illinois. In short, the iron is still made and still supported, which is what protects parts availability and resale on a used Hardinge.

Precision Built Into the Spindle

Hardinge engineering starts at the spindle and works outward. On the turning side the spindle is collet-ready, meaning the workholding mounts directly and concentrically rather than through an adapter, which removes a stack of error before the first cut. On the Super-Precision machines that spindle is preloaded and matched to the motor, and total indicated runout is held to fractions of a micron, the kind of accuracy a shop normally associates with a grinder, not a lathe.

The structure under that spindle is the other half of the story. Hardinge's patented HARCRETE polymer-composite base damps vibration and resists thermal drift far better than a comparable iron casting, which is what lets the machine hold its accuracy through a long run and through temperature swings. Glass scales, hand-fitted assembly, and certified roundness testing finish the package. None of it is decoration. Every choice answers the same question: how does a part come off the machine round, repeatable, and finished, without a second operation to fix what the lathe should have held?

The Collet and the Super-Precision Spindle Are the Whole Argument

Two things define a Hardinge and set the value of a used one: the collet-ready spindle and, on the top machines, the Super-Precision accuracy that spindle delivers. The 5C collet Hardinge invented is the reason the brand exists, and the collet-ready spindle is the reason its lathes hold concentricity a chucked machine cannot match. On a used Hardinge, the spindle and its bearings are the heart of the purchase, because a tired spindle on a precision lathe is most of the cost and most of the risk.

That is also why Hardinge owns the niches it owns. A Super-Precision T-series turning center holds certified roundness around fifteen millionths of an inch, and the HLV-H toolroom lathe has held its reputation as the most accurate manual lathe ever built for more than seventy years. When a buyer evaluates a used Hardinge, the spindle runout, the collet closer, and on Super-Precision machines the certified accuracy and the HARCRETE base are the center of the conversation, because the precision is the product.

The Portfolio in Shop Language

Super-Precision turning (HLV-H, T-42, T-51, T-65). The apex of the brand. The HLV-H is the legendary Super-Precision toolroom lathe, still in limited production after seventy years. The T-series turning centers add collet-ready spindles, live-tool turrets, and Fanuc controls with certified sub-micron accuracy.

Production turning (CHNC, Conquest, Cobra, QUEST, Talent). The workhorse second-op and bar lathes. The CHNC is one of the most prolific production CNC bar lathes in American history, the Conquest introduced the HARCRETE base in 1988, and the Cobra, QUEST, and reshored, USA-built Talent machines cover high-volume collet and bar work.

Bridgeport mills and VMCs. The Bridgeport Series 1 knee mill is the most-produced milling machine in history, with over 370,000 built since 1938, and it still anchors tool rooms everywhere. Bridgeport VMCs span the current V-Series, XR, and GX machines and legacy Torq-Cut, Discovery, and Interact generations, plus the EZ-Path conversational lathes.

The Grinding Group. Kellenberger cylindrical grinders from Switzerland, Jones and Shipman surface and cylindrical grinders from the UK, Hauser jig grinders, Tschudin centerless grinders, Voumard internal grinders, and Usach production grinders. Several are the reference machine in their category.

Collets and workholding. Not a machine, but core to the brand: Hardinge is the world's largest collet maker, and the Forkardt workholding group rounds out the portfolio. The 5C, 16C, 20C, and 25C collet systems run through the whole turning line.

U.S. Presence and Support

Hardinge has built in Elmira, New York since 1931, with additional manufacturing at Elgin, Illinois, in Switzerland at Goldach and Biel, and elsewhere. After the 2024 acquisition by Centre Lane Partners, the machine tool side operates as Kellenberger and the workholding side as Forkardt Hardinge, and both continue to build and support the lines. For a used-machine buyer, that continuity is central to the value: the HLV and Bridgeport Series 1 remain in active OEM parts support, Series 1 is still in production so heads, spindles, leadscrews, and R8 collets are catalog items, and HLV bearings use standard ABEC-7 sizes. A precision lathe or a grinder is only worth what you can keep accurate, and the depth of Hardinge parts and operator familiarity is exactly what protects uptime and resale.

How Hardinge Compares to Other Precision Turning Builders

Each one has a real argument. Okuma differentiates by owning its OSP control and building thermal compensation around running its machines as one system, strong across a broad turning range. Tsugami is the rigidity-and-finish player, with a deep precision Swiss and turning lineup. Index-Traub lives at the high-end multi-spindle and turn-mill extreme for precision production. Hardinge's lane is the one it created: collet-ready Super-Precision turning held to sub-micron accuracy, the workholding standard the rest of the industry uses, and a portfolio that reaches from the HLV toolroom lathe to Bridgeport mills to Swiss grinders. If the deciding question is collet-held precision a shop can trust without a second operation, Hardinge is built for that answer.

Hardinge did not start with a machine. It started with a collet, and built a century of American precision around it.

Why a Used Hardinge Holds Its Value

Hardinge iron holds value on the secondary market for the same reasons shops pay the premium new. The precision pedigree is real and hard to replace, the brands stay in active OEM parts support, operators already know the machines, and demand from aerospace, medical, defense, and tool-and-die shops stays steady because those industries do not stop needing precision. A clean Super-Precision lathe, a tight HLV-H, or a Bridgeport Series 1 with good ways is a machine a shop can put straight to work.

The arbitrage for a used buyer is real, with the spindle and accuracy as the conditions. As a rough guide to current secondary-market activity, Bridgeport Series 1 manual mills tend to trade from the low four figures to around ten thousand dollars by condition and head type, the HLV-H toolroom lathe holds its value better than any other manual lathe and commands a premium, production CHNC, Conquest, Cobra, and QUEST lathes run from the mid four figures into the five figures, Bridgeport V, XR, and GX VMCs run in the five figures, and Super-Precision T-series machines and Kellenberger and Hauser grinders reach well into the five and six figures. Many listings are request-price, and a certified-accuracy machine or a documented spindle rebuild adds real value, so the real number always comes down to a careful read of the specific machine.

What to Check When Buying a Used Hardinge

Super-Precision spindle runout. On Super-Precision lathes the spindle is everything. Test total indicated runout with a certified ground bar in a Special-Accuracy collet after a 20-minute warm-up. Runout beyond a tenth suggests bearing damage, which is the most expensive repair on the machine.

Collet closer and tailstock. Verify collet closer repeatability and clamping, and check tailstock alignment, since both directly affect the concentricity you are paying for.

HARCRETE base. Inspect the polymer-composite base for cracks. It is central to the machine's damping and accuracy and is not a simple repair.

Bridgeport head, ways, and leadscrews. On Series 1 and 2 mills, check R8 spindle runout and the taper for galling, test the 2J variable-speed head and its varidisc halves for smooth slide, and measure X and Y backlash. Up to about 0.010 inch is acceptable used; 0.020 or more means leadscrew and feed-nut replacement.

VMC and turning spindle, ATC, and turret. Test spindle runout cold and warm, cycle the tool changer through every pocket, check ballscrew backlash, and confirm live-tool runout on BMT or VDI turrets.

Control generation. Identify the control, current Fanuc 0i or 31i, Siemens, or Heidenhain versus legacy BOSS, DX-32, or SX-15 on older Bridgeports, since a legacy control may need a retrofit and affects parts and resale.

Grinders. On Kellenberger, Hauser, and Voumard machines, check wheel-spindle bearing rumble and thermal stability, and on hydrostatic-way machines confirm oil pressure at every pocket.

Records and provenance. A documented service history, a certified-accuracy report, or a known prior owner are worth paying for on a machine bought for its precision.

Who Runs Hardinge Machines

You find Hardinge wherever precision is the whole job. Aerospace and medical shops run the Super-Precision lathes on implants, instruments, and tolerance-critical components. Defense and firearms shops run the collet and bar machines on high-volume precision parts. Tool and die shops and watchmakers run the HLV-H and the jig grinders. General precision job shops run Bridgeport mills as the backbone of the tool room. The common thread is a shop competing on accuracy and finish, the exact work the collet-ready spindle and the Super-Precision build were made to win.

Resell CNC Take

Hardinge covers more ground than almost any brand we handle, from a sub-micron Super-Precision lathe to a sixty-year-old Bridgeport, so the inspection depends entirely on the machine. The constant is the spindle: on a Super-Precision lathe, verify the runout with a warmed-up machine and a certified bar, and on a Bridgeport check the head and the leadscrew backlash. A clean HLV-H, a tight Series 1, or a Super-Precision T-series with documented accuracy is a strong buy that holds its value. We help buyers read exactly that before they commit.

Frequently Asked Questions

Who is Hardinge?

Hardinge is an American precision machine tool builder founded in 1890 and based in Elmira, New York since 1931, best known for Super-Precision turning centers, the 5C collet it invented in 1901, and the Bridgeport knee mill it has owned since 2004. It is the world's largest collet maker and also owns the Kellenberger, Jones and Shipman, Hauser, Tschudin, and Voumard grinder brands.

Is Hardinge still in business?

Yes. After a July 2024 Chapter 11 filing, affiliates of Centre Lane Partners acquired substantially all of Hardinge's assets in September 2024. The machine tool business now operates as Kellenberger and the workholding business as Forkardt Hardinge, with production and support continuing at Elmira, in Switzerland, and at Elgin, Illinois.

Who owns Bridgeport now?

Hardinge acquired Bridgeport in 2004, and the Bridgeport lines came under the Centre Lane ownership in 2024. The Series 1 knee mill and the V-Series, XR, and GX VMCs are built in Elmira, New York, and the Series 1 remains in active production and parts support.

What is the difference between Super-Precision and standard precision?

Standard Hardinge lathes hold roughly two tenths of total indicated runout, while Super-Precision machines hold concentricity under about 0.7 microns and certified roundness near fifteen millionths of an inch. The Super-Precision bundle combines a HARCRETE base, a preloaded collet-ready motor spindle, and glass scales.

Can I still get parts for old Bridgeports and HLV lathes?

Yes. Both lines remain in active OEM parts support. The Bridgeport Series 1 is still in production, so heads, spindles, feed nuts, leadscrews, varidisc components, and R8 collets are catalog items, and HLV bearings use standard ABEC-7 sizes.

Are used Hardinge machines a good buy?

They can be a strong value because the precision pedigree, parts support, and operator familiarity hold up well with age. The keys are spindle runout on Super-Precision lathes, head and leadscrew condition on Bridgeport mills, and the control generation, since a legacy Bridgeport control may need a retrofit.