Asteroid Precision
Precision Swiss Turning and Grinding for Automotive, Firearms, Hydraulic, and Medical Programs
ISO 9001 • ITAR • FFL • SOT
ISO 9001 • ITAR • FFL • SOT
Line Card
Asteroid Precision is a contract manufacturing firm founded in 1966 and based in the Chicago area, specializing in tight-tolerance Swiss turning and precision grinding for automotive, firearms, defense, hydraulic, and medical programs. Engineers and procurement teams who need parts-complete components with grinding, honing, and metrology all under one roof rely on Asteroid when tolerance stack-up and surface finish are non-negotiable.
The facility runs Swiss-type lathes to 32 mm with live tooling, B-axis, and up to 11 axes of cutting capability. Precision grinding capabilities include centerless, cylindrical, and ID grinding with robotic loading, auto gauging, and automatic compensation. Honing to final geometry and finish is managed in-house. The metrology lab runs OGP Vision, MMQ 400, CS-3200, and MicroVu with geometric gauging to 0.00001 inch roundness repeatability.
Legg Associates is the factory-authorized representative for Asteroid Precision. One conversation connects you directly to their engineering and production team.
The facility runs Swiss-type lathes to 32 mm with live tooling, B-axis, and up to 11 axes of cutting capability. Precision grinding capabilities include centerless, cylindrical, and ID grinding with robotic loading, auto gauging, and automatic compensation. Honing to final geometry and finish is managed in-house. The metrology lab runs OGP Vision, MMQ 400, CS-3200, and MicroVu with geometric gauging to 0.00001 inch roundness repeatability.
Legg Associates is the factory-authorized representative for Asteroid Precision. One conversation connects you directly to their engineering and production team.
Centerless Grinding
Robotic loading with multi-feature grinds in a single cycle and tight auto-gauging compensation for consistent OD on high-volume programs.
- Robotic loading for high-volume, lights-out runs
- Multi-feature grinds in one cycle
- Auto gauging and compensation for repeatable output
- Equipment: Cincinnati Milacron, Agathon 255 robotic, MPC-600/450/250
ID Grinding
Leak-critical bore finishing for hydraulic and medical components with roundness measurement to 0.00001 inch.
- Okamoto and Studer S122 and S110 equipment
- Laser and vision metrology; roundness to 0.00001 inch
- Leak-critical bores for hydraulic and medical applications
- Tight concentricity and surface finish held to print
Cylindrical Grinding
CNC cylindrical grinding to 5 inch diameter by 30 inch length with multiple features per setup and automatic wheel dressing.
- Up to 5 inch diameter by 30 inch length
- Plunge and angle wheel configurations
- Toyoda CNC (GL4 and Select G); Studer Favorit
- Automatic dressing; multiple features per setup
Swiss Turning
Tight-tolerance Swiss turning with secondary grinding and honing managed in-house for parts-complete delivery.
- Bar diameter 0.04 mm to 32 mm (to 1.25 in)
- Lengths 0.01 to 6 inches; tolerances to ±0.0001 in
- 11-axis; live tooling; B-axis
- Secondary grinding and honing managed in-house for parts-complete programs
| Certifications | ISO 9001:2015, ITAR, FFL Type 7, SOT |
|---|---|
| Core Processes | Swiss turning, milling, precision grinding (centerless, cylindrical, ID), honing |
| Swiss Turning Window | Bar diameter 0.04 mm to 32 mm (to 1.25 in). Lengths 0.01 to 6 in. Tolerances to ±0.0001 in. Up to 11 axes with live tooling and B-axis. |
| Grinding Window | Cylindrical grinding to 5 in diameter by 30 in length. Auto length compensation and gauging capable. Centerless, cylindrical, and ID grinding all in-house. |
| Equipment | Cincinnati Milacron, Agathon 255 robotic, MPC-600/450/250 (centerless). Toyoda GL4 and Select G, Studer Favorit (cylindrical). Okamoto, Studer S122 and S110 (ID). Engis multi-stations and SPM (honing). |
| Quality and Metrology | OGP Vision with laser, MMQ 400, CS-3200, MicroVu. Geometric gauging to 0.00001 in roundness. Laser micrometer repeatability to 0.00002 in. |
| Documentation | PPAP Level 3, SPC, FAI, Certificate of Compliance, staged inspections (FAI, in-process, random sampling, final) |
| Industries | Automotive, firearms and defense, hydraulics and pneumatics, medical and dental |
| Locations | Des Plaines, IL and Wheeling, IL |
✓
A great fit for
- Automotive, hydraulic, and medical components requiring tight OD, ID, or bore tolerances with surface finish held to print
- Firearms and defense programs requiring ITAR-compliant domestic sourcing with FFL and SOT compliance
- Parts-complete programs where Swiss turning and grinding can be managed under one roof
- High-volume centerless grinding programs benefiting from robotic loading and auto compensation
- Programs requiring PPAP Level 3, SPC, and staged inspection documentation
×
Not the right fit for
- Large structural or weldment programs outside the Swiss and grinding envelope
- Sheet metal, stamping, or fabrication programs
- Same-day or next-day emergency builds
- Requests requiring offshore or non-domestic manufacturing
Additional Information
Equipment
Asteroid Precision runs a comprehensive equipment set covering Swiss turning, milling, centerless grinding, cylindrical grinding, ID grinding, honing, and in-house metrology.
- Swiss turning: diameter 0.04 mm to 32 mm (to 1.25 in), lengths 0.01 to 6 in, tolerances to ±0.0001 in (Fanuc Robodrill, Nakamura, Brother, Yam Seiki)
- Multi-axis mills and mill-turns
- Centerless grinding: Cincinnati Milacron, Agathon 255 robotic, MPC-600/450/250
- Cylindrical grinding: Toyoda GL4 and Select G, Studer Favorit
- ID grinding: Okamoto, Studer S122 and S110
- Honing: Engis multi-stations, Engis SPM
- Metrology: OGP Vision with laser, MMQ 400, CS-3200, MicroVu; laser mic repeatability to 0.00002 in
Inhouse Process Capabilities
- Swiss turning (miniature and tight-tolerance; live tooling, B-axis, up to 11 axes)
- Precision grinding (centerless, cylindrical, ID) with auto gauging and compensation
- Milling and mill-turn machining; secondary operations (drill, mill, broach, coin)
- Honing to final geometry and finish
- Quality documentation and control (FAI, PPAP L3, SPC, staged inspections)
- Lot traceability, Certificate of Compliance, production packaging and kitting
Outside Process Capabilities
All outside processes are managed through approved partners.
- Heat treat (through, induction, age harden, stress relief)
- Coatings and plating (nitriding, phosphate, black oxide, nickel)
- Surface finishing (tumble, deburr, bead blast) beyond in-house as needed
- Specialty testing and NDT via approved partners (X-ray and CT, dye penetrant, magnetic particle)
- Marking and packaging per spec including labeling and protective packaging
Markets Served
- Automotive: manifolds, gears, spools, plungers, pins, valves
- Firearms and defense: bolts, carriers, gas keys, ejectors, barrel extensions, pins, LPKs
- Hydraulics and pneumatics: poppets, sleeves, valves, spools, shafts, housings
- Medical and dental: motor housings, probes, picks, shafts, burrs, pins, chambers
- Industrial and general OEM components
Certifications
Asteroid Precision holds the following certifications. Certificates of conformance and lot traceability documentation are available per order.
- ISO 9001:2015
- ITAR Registered
- FFL Type 7
- SOT
Get in Touch
Looking for a precision grinding or Swiss turning supplier? Send us a message and we will get back to you the same business day.
Speak Directly with Charles
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Charles Legg
VP & Sales Representative — Est. 1959
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Charles will get back to you within a few hours during business hours. If it's time-sensitive, call directly at 540-589-7888.