Legg Associates Inc

Charles Legg
Sales Rep
Asteroid Precision Logo

Asteroid Precision

Precision Swiss Turning & Grinding — U.S. Manufacturer

ISO 9001 • ITAR • FFL • SOT
Swiss-turned precision shafts — Asteroid Precision
CNC ground firearm bolt component — Asteroid Precision
Custom gear grinding part — Asteroid Precision
Precision shaft grinding and Swiss turning — Asteroid Precision

Asteroid Precision, a contract manufacturing firm founded in 1966, specializes in complex high-precision component machining and manufacturing.

We are known for our constant innovation, state of the art technology, highly skilled personnel, and our firm commitment to quality. We have become a preferred supplier for the most well-known OEMs in a range of industries including automotive, medical, military, hydraulic, and industrial.
CertificationsISO 9001:2015 • ITAR • FFL Type 7 • SOT
Core processesSwiss turning • Milling • Precision grinding (centerless, cylindrical, ID) • Honing
Swiss turning windowØ 0.04 mm–32 mm (to 1.25") • lengths 0.01–6" • tolerances to ±0.0001"
Grinding windowUp to Ø 5" × 30" length • auto length compensation & gauging capable of < 0.0004" • auto dressing • robotic ops
Representative equipmentCincinnati Milacron; Agathon 255 (robotic); MPC-600/450/250 • Toyoda GL4/Select G; Studer Favorit • Okamoto; Studer S122/S110 • Engis multi-stations & SPM (honing)
Quality & metrologyOGP Vision (laser) • MMQ 400 • CS-3200 • MicroVu • geometric gauging to 0.00001" roundness • laser micrometers repeatability 0.00002"
DocumentationPPAP (Level 3) • SPC • FAI • Certificate of Compliance • staged inspections (FAI, in-process, random sampling, final)
IndustriesAutomotive • Firearms & Defense • Hydraulics • Medical
LocationsDes Plaines, IL • Wheeling, IL

A great fit for

  • Tight-tolerance parts requiring centerless/ID/cylindrical grinding with gauged repeatability
  • Swiss-turned micro/miniature components with downstream grinding/honing
  • Programs needing PPAP/FAI, SPC, and documented inspection flow
×

Not a fit for…

  • Same-day emergency builds
  • Large prismatic fabrications or sheet-metal assemblies
  • Non-domestic sourcing requests
Micro Swiss-turned pin component — Asteroid Precision
CNC ground hydraulic spool valve — Asteroid Precision
Swiss-turned miniature wire probes — Asteroid Precision
Custom ground bushing — Asteroid Precision
Close-tolerance Swiss-turned parts — Asteroid Precision
Precision medical implant components — Asteroid Precision
CNC ground automotive shaft — Asteroid Precision
ID grinding part with tight tolerance — Asteroid Precision
Additional Information
    • Swiss turning (Ø 0.04 mm–32 mm / to 1.25″, lengths 0.01″–6″, to ±0.0001″)

    • Multi-axis mills & mill-turns (Fanuc Robodrill, Nakamura, Brother, Yam Seiki, etc.)

    • Centerless grinding (Cincinnati Milacron, Agathon 255 robotic, MPC-600/450/250)

    • Cylindrical grinding (Toyoda GL4 / Select G, Studer Favorit)

    • ID grinding (Okamoto; Studer S122/S110)

    • Honing (Engis multi-stations, Engis SPM)

    • Metrology (OGP Vision/laser, MMQ 400, CS-3200, MicroVu; laser mic repeatability ~0.00002″)

    • Heat treat (through/induction/age-harden, stress-relief)

    • Coatings & plating (nitriding, phosphate, black oxide, nickel, etc.)

    • Surface finishing (tumble, deburr, bead blast) beyond in-house as needed

    • Specialty testing/NDT via approved partners (X-ray/CT, dye penetrant, mag particle)

    • Marking/packaging per spec (incl. labeling, protective packaging)

    • Automotive (manifolds, gears, spools, plungers, pins, valves)

    • Firearms & Defense (bolts, carriers, gas keys, ejectors, barrel extensions, pins, LPKs)

    • Hydraulics/Pneumatics (poppets, sleeves, valves, spools, shafts, housings)

    • Medical & Dental (motor housings, probes, picks, shafts, burrs, pins, chambers)

    • Industrial/General OEM components

    • Swiss turning (miniature/tight-tolerance; live tooling, B-axis, up to 11 axes)

    • Precision grinding (centerless, cylindrical, ID) with auto gauging/compensation

    • Milling and mill-turn machining; secondary ops (drill, mill, broach, coin)

    • Honing to final geometry and finish

    • Quality documentation & control (FAI, PPAP L3, SPC, staged inspections)

    • Lot traceability, C of C; production packaging and kitting

ISO 9001:2015
ITAR
FFL
SOT

2190 South Wolf Road Des Plaines, IL 60018

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CL
Charles Legg
Sales Representative
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