Description
Product Overview
This SK gauge pin set covers the 4.00–4.50mm range in 0.01mm increments — 51 individual pins in total — giving you a precise, go/no-go reference for bore verification, drill and reamer qualification, slot checking, and fixture proving without having to reach for a bore mic every time. Stored in their original fitted case with the pin handle included, this is a complete, ready-to-use set that slots straight onto the bench or into the toolroom cabinet.
- 0.01mm increment steps across the full 4.00–4.50mm range — Each pin is ground and lapped to a tight tolerance, meaning you can bracket a bore or slot to the nearest ten-micron step and confirm conformance without relying solely on a comparator. That granularity matters when you’re qualifying reamers, checking jig-bore work, or verifying small punch and die clearances.
- Hardened and ground pin bodies — Gauge pins are only useful as long as their working surfaces stay true. Hardened steel resists wear from repeated insertion, so the set retains its accuracy across a working life of thousands of checks — far longer than a soft or plated alternative would.
- Knurled cap identification system — Each pin’s nominal size is marked clearly on the cap, and the organiser tray labels every position. On a busy bench you can locate the right pin by feel and confirm by sight in seconds, which matters when you’re mid-setup on a machining centre and don’t want to break concentration.
- Fitted wooden case with foam lid and labelled tray — Every pin has a home. A disorganised gauge pin set is a damaged gauge pin set; the original case keeps pins seated, protected from impact, and away from swarf and coolant contamination between uses.
- Ideal for — qualifying reamed bores, checking drill sizes before final pass, verifying slot widths on EDM and milling work, go/no-go inspection of jig-bored holes, setting bore gauges and small internal comparators, and checking keyway width on shaft and hub fits.
Condition
Used (Like New / Most Pins Factory Sealed)
The set presents in exceptional shape. The seller confirms the majority of pins remain in their original factory-sealed condition — visible through the clear caps — meaning their ground surfaces have never contacted a workpiece bore. The pins that have been used show no visible wear, scoring, or corrosion on the gauge bodies; surfaces appear clean and retain their original ground finish. The fitted wooden case is intact, latches function correctly, and the foam lid insert is undamaged. The labelled plastic tray is clean and all pin positions are occupied. The included pin handle is present and functional. As with any used gauge pin set, it is good practice to verify a sample of pins against a calibrated ring gauge or on a bench micrometer before putting the set into formal inspection service — particularly if SPC or documented inspection records are required. For general toolroom use, fixture proving, and machine setup work, the set is ready to use as received.
Included:
- 1 x SK Gauge Pin Set, 4.00–4.50mm, 0.01mm increments (51 pins)
- 1 x Original fitted wooden storage case with foam lid and labelled tray
- 1 x Pin handle
Not included: Calibration certificate (none supplied — verify against a calibrated reference if formal traceable inspection records are required).
Brand Information
SK (Shinwa Sokutei / SK Japan) is a well-regarded Japanese precision measuring instrument manufacturer with a long history supplying the toolroom and inspection market across Asia-Pacific and globally. Japanese gauge pin sets from SK sit in the same quality tier as Mitutoyo and RSK offerings — manufactured to exacting ground and lapped tolerances, with consistent hardening and surface finish standards expected of Japanese metrology tooling. For Australian machinists and toolmakers, SK is a recognised and trusted name that punches above its price point relative to European equivalents of comparable accuracy.
Specifications
| Feature | Specification |
|---|---|
| Brand | SK (Japan) |
| Type | Gauge Pin Set (Plug / Pin Gauges) |
| Measuring Range | 4.00mm – 4.50mm |
| Increment / Resolution | 0.01mm (every 10 microns) |
| Number of Pins | 51 pins |
| Material / Construction | Hardened and ground gauge steel |
| Identification | Size marked on knurled cap; labelled tray positions |
| Country of Origin | Japan |
| Condition | Used (Like New) — majority of pins factory sealed |
| Included Items | 51 x gauge pins, original fitted wooden case, pin handle |
| Not Included | Calibration certificate |
Keywords
SK gauge pin set, SK plug gauge set, gauge pin set 4.00–4.50mm, pin gauge set metric, plug gauge set toolroom, bore verification pins, go no-go gauge pins, precision gauge pins Australia, SK Japan metrology, inspection pin set machinist, gauge pin set CNC, toolroom plug gauges metric
