Description
Product Overview
The Ocean D454 Setting Ring is a 32mm bore gauge master ring — a hardened, precision-ground reference standard used to set bore micrometers, internal dial gauges, and telescoping gauge setups to a known diameter before you go near the workpiece. Marked ø32 with a deviation of –0.001mm, this ring gives you a traceable starting point that keeps your internal measurements honest. It’s the kind of toolroom reference that sits next to your Mitutoyo bore mic and doesn’t leave the bench.
- Precision-ground bore to ø32mm (–0.001mm deviation) — the engraved tolerance tells you exactly where this ring sits relative to nominal, so you can account for it when zeroing your instrument rather than chasing phantom error in your workpiece.
- Hardened steel construction — setting rings take a lot of contact from gauge anvils and bore mic measuring faces. A hardened bore resists wear at the reference surface, meaning the ring holds its geometry over thousands of uses without the bore going bell-mouthed or out-of-round.
- Knurled outer diameter — a practical detail that makes a real difference when you’re picking this up with oily hands mid-run. The knurl gives you purchase without fumbling.
- Compatibility — directly suits any bore micrometer, internal dial indicator, air gauge probe, or telescoping gauge calibrated in the 32mm range. No adapters required; simply present your measuring instrument to the bore, zero, and go.
- Ideal for — zeroing bore micrometers prior to measuring bearing housings, hydraulic cylinder bores, and bushing fits; verifying internal dial indicator setup on a surface grinder chuck bore; setting air gauging equipment at the start of a production run; and confirming roundness checks on turned or honed bores at the 32mm nominal.
Condition
(Used — Good Condition / Light Workshop Patina)
The bore — the surface that actually matters on a setting ring — is in good working order. The ground internal surface shows no visible scoring, chatter, or wear steps that would affect your zero. The outer faces and knurled OD carry the expected patina of a used toolroom reference: light handling marks and superficial surface dulling consistent with bench use, but nothing structural. The engraved markings (ø32, –0.001, Ocean, D454) are fully legible. As with any used ring gauge, we recommend verifying the bore against a calibrated bore micrometer or air gauge before putting it into production service — this is standard practice regardless of age or source, and confirms the ring is still performing within its marked deviation. For jobbing shop, toolroom backup, or home workshop use, this ring will do the job reliably.
Included:
- 1 x Ocean D454 32mm Setting Ring (ø32, –0.001mm deviation)
- 1 x Original green presentation box
Not included: Certificate of calibration / NATA calibration documentation.
Brand Information
Ocean is a Japanese precision metrology brand with a long-standing presence in the toolroom gauge and reference standard market. Japanese metrology manufacturing — whether from the major names or specialist producers like Ocean — is held to tight process controls and sits comfortably alongside brands such as Niigata Seiki and RSK in terms of material quality and grinding standards. For a setting ring, where the geometry of the bore is the entire product, Japanese origin is a genuine indicator of dimensional reliability rather than a marketing badge.
Specifications
| Feature | Specification |
|---|---|
| Brand | Ocean |
| Model / Part Number | D454 |
| Type | Setting Ring / Master Ring Gauge |
| Nominal Bore Diameter | ø32mm |
| Marked Deviation | –0.001mm (from nominal 32.000mm) |
| Construction | Hardened steel, precision ground bore |
| Outer Diameter Feature | Knurled OD for secure handling |
| Country of Origin | Japan |
| Condition | Used — Good Condition / Light Workshop Patina |
| Included Items | Setting ring, original green presentation box |
| Not Included | Calibration certificate |
Keywords
Ocean D454 setting ring, Ocean ring gauge 32mm, bore gauge setting ring, master ring gauge 32mm, internal bore reference standard, toolroom ring gauge Australia, bore micrometer zero setting, bore gauge master ring, precision ring gauge Japan, 32mm bore standard, setting ring bore mic, metrology reference gauge
