Jinwojingmi machines custom core pins and hard-wearing tooling for buyers who need a supplier that can hold a drawing, not just supply a catalogue part. Our precision cnc machining parts are produced on multi-axis CNC equipment in tungsten carbide, and every cnc precision machining parts batch is inspected against international standards before it leaves the shop.
Everything below is stated on the current Tungsten Carbide Core Pin page. Read it as the boundary of what this shop will commit to before you send a file.
| Envelope area | Published position | What it means for your RFQ |
|---|---|---|
| Manufacturing process | Precision CNC machining carried out on multi-axis CNC equipment | Send a fully defined 3D model and drawing; the geometry is cut on multi-axis equipment rather than by single-axis turning alone. |
| Core material | Tungsten carbide, premium grade | Wear-critical core pins and inserts are quoted in carbide, not in tool steel, when abrasion is the failure mode. |
| Customization | Custom dimensions, tolerances and surface treatments available based on customer drawings and requirements; adaptation to client-specific drawings and diverse geometries | Your drawing defines the part. Call out dimensions, tolerance bands and any surface treatment request on the file you submit. |
| Quality control | Full inspection per batch according to international standards | Inspection is a batch routine, not a special request. Say which characteristics are critical so they are covered in the inspection record. |
| Production scale | Supports both prototype and full-scale production | One supplier can carry the part from trial sample through to repeat production volumes. |
The core pin sits in the harshest position in most mold assemblies: it forms an internal cavity or core feature and then takes the full force of every shot, every cycle. The product page positions tungsten carbide for exactly that duty, describing exceptional hardness, abrasion resistance and wear resistance, plus the ability to withstand high mechanical loads.
The page also states that the design resists deformation and holds structural stability in high-stress tooling systems, and that it supports modularity and ease of integration inside mold assemblies. Those are the properties that translate into the commercial outcome the page lists: reduced tooling failures, extended core pin service intervals, lower total cost of ownership, reduced maintenance downtime and improved throughput.
This page does not publish a hardness grade, a numeric tolerance band, a surface-finish value, a lead time or a price. Those numbers must come from your drawing review and the quotation, never from an assumption. If a figure matters to your approval, ask for it in writing with the quote.
What happens after you submit a file, described only in the terms the product page supports.
You send the part drawing and requirements. Dimensions, tolerances and surface treatments are confirmed against your file before anything is cut.
Carbide stock is machined on multi-axis CNC equipment to the agreed dimensions and surface treatment.
Full inspection per batch according to international standards, checking the part against the drawing you approved.
The same process supports prototype quantities and full-scale production, so a qualified part does not need requalifying at ramp-up.
For a core pin, the reliability question is not "can it be made once" but "will pin 40 match pin 1". The product page answers that with two linked statements: the parts are produced to tight tolerances with high repeatability and surface finish quality, and quality control inspections conform to international standards on a per-batch basis.
The buyer decision that follows is straightforward. If your assembly depends on one or two critical characteristics, name them in the RFQ so they are visible on the inspection record for every batch. If your part is defined only by a nominal sketch, expect a quotation conversation about tolerances before production rather than after.
The product page names four application contexts. Each one maps to a different reason the part is specified in carbide.
Designed for mold applications, including creating accurate internal cavities and core features. The pin forms the geometry that the molded part inherits.
Decision: define the cavity geometry and its tolerance on the drawing.
Listed as an application for the part. High-cycle molding is where wear resistance and structural stability in high-stress tooling systems matter most.
Decision: confirm batch inspection covers the wear-critical dimensions.
Listed as an application for the part, where small core features must be produced repeatedly to a tight tolerance.
Decision: supply feature dimensions with tolerance callouts, not nominal-only values.
Listed as an application for the part. Abrasive compounds attack tool steel edges; carbide is specified for abrasion and wear resistance.
Decision: state the abrasive filler and request the appropriate surface treatment.
The page states the design supports modularity and ease of integration within mold assemblies, so a worn pin can be replaced without reworking the block.
Decision: share the mating bore data so the pin fits the assembly first time.
Prototype and full-scale production are both supported on the same process, which keeps a validated trial part consistent at volume.
Decision: tell the shop the target production volume at the prototype stage.
Find your situation, then check the product fact behind it and the decision you need to make before the RFQ goes out.
Pricing, tolerance bands and surface treatment options are confirmed against your drawing, not from a list price. Submit the file and the shop reviews the geometry, the material and the inspection scope before quoting.
Custom dimensions, tolerances and surface treatments are quoted from customer drawings.
Keep adjacent product options together for a faster catalog comparison.
review the product details, images, and specifications presented on the official product page.
use the application and use-case information published on the official product page.
confirm the specifications and options listed for the exact product variant before placing an order.
check the official product page or ask the supplier about options shown for the selected product.
use the official contact or inquiry path provided on the site.
include the product page, intended use, required quantity, and any specifications you need the supplier to review.
