Straight Core Pins without Tip Processing
Standard as-ground cylindrical end face. The most economical option for internal features where tip surface finish is not critical.
Products in This Category
JIS Standard SKH51/SKD61 Steel Straight Core Pins | OEM Available
Straight Core Pins in SKH51/SKD61 Steel with High Tolerance. Engineered for plastic injection molding with custom option
JIS Standard SKH51/SKD61 Steel Straight Core Pins | OEM Available
Straight Core Pins in SKH51/SKD61 Steel with High Tolerance. Engineered for plastic injection molding with custom option
JIS Standard SKH51/SKD61 Steel Straight Core Pins | OEM Available
Straight Core Pins in SKH51/SKD61 Steel with JIS Head. Engineered for plastic injection molding with custom options. Con
JIS Standard SKH51/SKD61 Steel Straight Core Pins | OEM Available
Straight Core Pins in SKH51/SKD61 Steel with 0.01mm Increments. Engineered for plastic injection molding with custom opt
JIS Standard PROVA400/TAVAX ESR Straight Core Pins | OEM Available
Straight Core Pins in PROVA400/TAVAX ESR with ESR Steel. Engineered for plastic injection molding with custom options. C
JIS Standard Straight Core Pins | OEM Available
Straight Core Pins in NAK80/SUS440C/MAS1C/DH2F with Specialty Steel. Engineered for plastic injection molding with custo
JIS Standard Straight Core Pin Blanks | OEM Available
Straight Core Pin Blanks in SKH51/SKD61 Steel with Core Blanks. Engineered for plastic injection molding with custom opt
Inch Standard H13 Steel (Soft) Straight Core Pins | OEM Available
Straight Core Pins in H13 Steel (Soft) with Inch Soft H13. Engineered for plastic injection molding with custom options.
Inch Standard H13 Steel (Hardened) Straight Core Pins | OEM Available
Straight Core Pins in H13 Steel (Hardened) with Inch Hard H13. Engineered for plastic injection molding with custom opti
DIN Standard H13 Steel DIN Straight Core Pins | OEM Available
DIN Straight Core Pins in H13 Steel with DIN Metric. Engineered for plastic injection molding with custom options. Conta
Product Selection Guide
Products differ by dimensional standard and tolerance grade. Match to your mold plate origin:
| Variant | Description | Best For | Recommendation |
|---|---|---|---|
| JIS Standard | Head T=4 mm, Asian diameter series, taper-fit shank | Molds built in Japan, China, Korea, Taiwan | Verify plate pocket matches JIS spec |
| DIN Standard | Head T=5 mm, European diameter series, different taper angle | Molds built in Germany or to European tooling standards | Not interchangeable with JIS |
| Standard Tolerance | Shaft OD per JIS/DIN default (±0.01 mm typical) | General-purpose applications with standard bore clearance | Default — most applications |
| Extra-Precision | Shaft OD tightened to +0/−0.005 mm | Minimal-clearance bores, thin-wall molding requiring concentricity | Premium — tight-fit only |
Is No-Tip Processing Right for You?
Standard (no-tip) core pins are the right choice when the molded feature meets these conditions:
✅ No-Tip is correct if:
- The internal feature is not visible to the end user (screw bosses, alignment holes, cable channels)
- Surface finish requirement is Ra > 0.4 μm (standard ground finish is sufficient)
- No date code, cavity number, or other marking is needed on the molded feature
🔄 Consider switching to:
- Molded feature is visible to end user? → Tip-Processed Core Pins
- Need a date code or cavity number on the part? → Engraved Core Pins
- Deep blind cavity with burn marks? → Gas Release Core Pins
- Tip wear is your primary maintenance cost? → Inlay Core Pins (replaceable tip)
Quick Reference by Specification
Already know your parameters? Find the matching product directly:
| Standard | Material | Key Feature | Product |
|---|---|---|---|
| JIS | SKH51 (M2) | Standard tolerance, general-purpose | JIS Standard Hardened Steel No-Tip Straight Core Pins |
| JIS | SKH51 (M2) | High tolerance fit | JIS Hardened Steel No-Tip Core Pins | High Tolerance Fit |
| JIS | SKD61 (H13) | High-temp / thin-pin toughness | JIS SKD61 Steel No-Tip Straight Core Pins |
| JIS | SKD61 (H13) | +5/+0.1 L dimension tolerance | JIS Hardened Steel No-Tip Core Pins | +5/+0.1 L Tolerance |
| JIS | STAVAX ESR | Corrosion-resistant, medical/optical | JIS STAVAX ESR Steel No-Tip Straight Core Pins |
| DIN | Hardening Steel | European standard, configurable | DIN Standard Hardening Steel No-Tip Core Pins |
| DIN | Hardening Steel | European standard, tooling applications | DIN Standard Core Pins No-Tip | Hardening Steel |
| DIN | Hotwork Steel | Metric, etched for identification | DIN Hotwork Steel Metric Core Pins | Etched |
| Inch | Hotwork Steel | Soft, close coring fit | Hotwork Steel Soft Core Pins — Inch |
| Inch | Hotwork Steel | Hard, close coring fit | Hotwork Steel Hard Core Pins — Inch |
About No-Tip Straight Core Pins
Not every molded hole requires a mirror-finish cavity surface. Screw boss holes, cable routing channels, and alignment bores are hidden inside the assembled product — for these features, a standard no-tip core pin delivers the required dimensional accuracy at the lowest cost per pin.
The shaft is precision-ground to JIS or DIN tolerances with a standardized head thickness of T = 4 mm. Material options range from SKH51 (M2) for high-cycle general-purpose molds, through SKD61 (H13) for elevated-temperature applications, to STAVAX ESR for medical and optical molds requiring corrosion resistance.
No-tip pins are the recommended starting point for most new mold designs. If testing reveals that the molded feature requires a better surface finish, upgrading to a tip-processed variant is straightforward — the shaft dimensions and head are identical.
Application Scenarios
No-tip straight core pins are the standard choice across a wide range of injection molding applications. Here are the most common scenarios where they deliver optimal performance:
Screw Boss & Fastener Holes
Pain point: High-volume consumer electronics and automotive interior molds require dozens of screw boss holes per part — each one adding tool cost if over-specified with tip processing.
Why no-tip fits: Screw boss holes are purely functional — hidden inside the assembled product and threaded by self-tapping screws that erase any surface marks. Standard ground finish (Ra ~0.8 µm) is more than sufficient, cutting per-pin cost by 20-30% versus tip-processed variants.
Medical Device Internal Channels
Pain point: Medical device housings require internal fluid routing channels that must resist corrosion from autoclave sterilization cycles — but the channels are internal and never patient-facing.
Why no-tip fits: STAVAX ESR material provides the corrosion resistance needed to survive aggressive resin chemistries (PPS, PEEK) without tip processing cost. The internal channel geometry does not require cosmetic surface quality.
Alignment & Through-Holes in Connectors
Pain point: Multi-cavity connector molds need tight positional accuracy across 16-64 cavities — but the alignment holes themselves are concealed inside the connector body after assembly.
Why no-tip fits: Extra-Precision tolerance (+0/−0.005 mm) ensures concentricity across all cavities. Since the holes are non-cosmetic, no tip processing is needed — saving cycle time on large cavity counts.
Related Categories
Frequently Asked Questions
When is a no-tip core pin sufficient?+
What is the difference between JIS and DIN standard core pins?+
Are STAVAX ESR core pins available without tip processing?+
Engineering Resources
Case Studies
Need a Custom Quote?
Send your specifications — material, dimensions, quantity — and receive a quote. MOQ: 1 piece. Custom dimensions available.