Description
Product Overview
The Niroc Tools Carbide Prick Punch is a hand-made Australian precision layout tool built around a shrunk-fit tungsten carbide tip and a solid brass handle with an engraved Niroc knurl. Where a standard centre punch will skate on hardened surfaces or mushroom after repeated strikes on tough alloys, the carbide tip holds its point and bites cleanly, making this a genuinely useful addition to any toolroom, jewellery bench, or fabrication setup that works across a broad range of material hardnesses.
- Tungsten carbide tip (shrunk-fit, replaceable) — Carbide resists deformation up to approximately 55 HRC, meaning this punch will mark tool steels, hardened ground stock, and hard non-ferrous alloys that would blunt or deform a HSS or plain steel tip within a session. The shrunk-fit retention method exploits the near-zero thermal expansion of carbide against brass — heat the handle, the brass expands, the carbide releases. That means tip replacement is a practical field repair, not a workshop exercise requiring a press.
- 9.5 mm (3/8″) brass handle with Niroc engraved knurl — Brass gives just enough weight and density to translate hammer energy efficiently without the handle bouncing back in the hand. The engraved Niroc knurl pattern cuts positively into the palm, which matters on a punch where axial slip means a misplaced witness mark on a finished surface or a scribed line that starts in the wrong spot.
- Field-sharpenable tip — Tungsten carbide can be dressed on a ceramic or silicon carbide belt, a diamond plate, or even a diamond wheel mounted in a cordless drill (handle in chuck, tip presented to the plate with water as coolant). For machinists who already have these consumables on the bench, this effectively means the working life of the tool is indefinite — you’re sharpening the insert, not buying a new punch each time the point rounds.
- Compatibility / tip replacement — The 6 mm carbide insert is retained by shrink fit; no adhesive is required for a correctly seated tip. If repeated tip cycling loosens the interference fit over time, a drop of medium CA glue restores retention. Replacement carbide tips are available from Niroc Tools. No accessories are included with this listing.
- Ideal for — Scribing witness marks on hardened workpieces prior to drilling, centre-spotting on hardened ground stock before EDM or grinding, marking out on stainless and high-alloy steels, jewellery and engraving work requiring precise dot placement, and texturing or decorative punch work on metals up to approximately 55 HRC.
Condition
(New — Factory Sealed)
This punch is new and unused. The carbide tip is at full factory geometry — sharp, correctly ground, and showing no signs of rounding, chipping, or contact with any workpiece surface. The brass handle is unmarked, with the Niroc knurl pattern fully formed and free of damage. The shrunk-fit tip seat is undisturbed. Because this is a hand-made Australian tool rather than a mass-produced import, minor cosmetic variation between individual pieces (subtle differences in knurl depth, brass surface finish) is normal and expected — it is not a defect. Mechanically and functionally, the tool is exactly as made. No calibration verification is applicable to a prick punch, but if you intend to use it as a precision scribing reference (e.g. spotting centre marks for CNC datum establishment), the tip geometry can be confirmed visually under magnification or presented lightly against a piece of layout blue on a surface plate to verify the point runs true before first use.
Included:
- 1 x Niroc Tools Tungsten Carbide Prick Punch — 9.5 mm brass handle, 6 mm carbide tip, shrunk-fit
Not included: Storage/presentation case, spare carbide tips, striking hammer.
Brand Information
Niroc Tools is an Australian hand-tool maker producing precision scribers, punches, and knurled instruments from its own workshop. The brand is best known for its engraved “Niroc knurl” pattern and its use of proprietary tungsten carbide insert materials selected specifically for punch and scribing applications — a level of material specification more commonly associated with toolroom-grade cutting tool suppliers than with hand-layout tool producers. For buyers who typically reach for Starrett or Starrett-equivalent punches, Niroc sits in the same tier of considered, purpose-built hand tooling, with the added advantage of local manufacture, direct tip-replacement support, and the option of custom knurling.
Specifications
| Feature | Specification |
|---|---|
| Brand | Niroc Tools |
| Model / Type | Carbide Prick Punch — Slimline Series |
| Tip Material | Tungsten carbide (proprietary grade, punch-optimised) |
| Tip Retention Method | Shrunk-fit (CA glue backup if required after repeated tip cycles) |
| Tip Insert Diameter | 6 mm |
| Handle Material | Solid brass |
| Handle Diameter | 9.5 mm (3/8″) |
| Knurl Pattern | Niroc engraved knurl |
| Maximum Material Hardness | Approximately 55 HRC |
| Tip Sharpenability | Yes — ceramic/SiC belt, diamond plate, or diamond wheel with water |
| Country of Origin | Australia (hand-made) |
| Condition | New — Factory Sealed |
| Included Items | 1 x Carbide Prick Punch |
| Not Included | Case, spare tips, hammer |
Keywords
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