Tolerances
- Typical final TIR ≤ 0.0005″ (job dependent)
- Diameters to ±0.0003″
- Flatness and parallelism to spec
Capacity & quality
Dialled-in envelopes, finishes, and inspection coverage
Jameson Machining Inc. builds grinding and plating plans that align to GTA production tolerances and reporting requirements while protecting lead time.
Grinding envelopes
Capabilities reflect current assets; larger work reviewed on request.
| Operation | Envelope | Notes |
|---|---|---|
| Cylindrical grinding | 24″ diameter × 90″ between centers | Steady rests, in-process gauging, chrome workflows |
| Centerless grinding | Through-feed & in-feed to 4″ OD | Profile tooling, documented blade changes |
| Surface grinding | Magnetic & vacuum fixtures up to 40″ | Matched sets, parallelism monitoring |
Tolerances & finishes
Maintaining tolerance stacks keeps your assemblies on schedule.
Finishes
- Industrial Ra bands 32–63
- Fine and polish finishes to drawing
- Chrome polishing with NAHC coordination
Inspection & reporting
Quality documentation is provided to meet your internal audit requirements.
Inspection coverage
- Calibrated indicators and micrometers
- Third-party CMM by request
- Surface finish verification
Documentation
- Inspection certificates
- Material traceability on supplied stock
- Chrome partner certificates (NAHC)
Materials supported
We grind ferrous alloys and stainless steels with documented wheel pairings.
Alloy steels
4140, 4340, 4150, and induction-hardened shafts.
Carbon steels
1045, 1018, and customer-supplied stock with mill certs.
Stainless steels
17-4, 410, and other stainless programs with coolant control.
Plan the next run
Share your envelope, tolerance, and delivery window so we can build the schedule.
