One Step Taperless Core Pins
Single-step with taperless cylindrical retention shank. Standard straight bore — no taper reaming.
Products
SKH51 Steel One-Step Core Pins
One-Step Core Pins in SKH51 hardened steel for tight mold assemblies. One-step geometry with selectable shaft diamete...
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SKH51 Steel One-Step Core Pins Flat-Sided
One-Step Core Pins flat-sided (SKH51 steel) for extra-precision tooling. One-step design with tight shaft tolerances ...
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One-Step Core Pins No Second Step
One-step core pins with no second step for precise one-stage alignment in molds. Available in SKH51/DK61 hardened ste...
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Precision Taperless One-Step Core Pins - Configurable Sha...
Precision Taperless One-Step Core Pins - Configurable Shaft Diameter for mold core locating. Two-tier one-step geomet...
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Taperless One-Step Core Pins - No Second Step
Taperless One-Step Core Pins with no second step for stable one-piece core location. Choose SKH51, SKD61, NAK80 or SU...
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Taperless One-Step Core Pins
Taperless One-Step Core Pins provide a no-second-step design with precise one-step geometry for stable mold fit. Choo...
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JIS Standard Hardened Steel Taperless One-Step Core Pins ...
Taperless One-Step Core Pins with tip lapped finish for stable one-step core seating. Hardened steel options SKH51 or...
View DetailsFit Option Selection
Taperless one-step pins are available with multiple bore-fit classes. Match to your operating conditions:
| Variant | Description | Best For | Recommendation |
|---|---|---|---|
| Standard Clearance Fit | Pin slides freely into a straight bore, retained by head clamping | General-purpose applications, easy pin replacement | Default — simplest installation |
| Tight Interference Fit | Pin pressed into bore with slight interference for maximum rigidity | High injection pressure, thin-wall molding, vibration resistance | When pin stability is critical |
Do You Need Taperless Retention?
Taperless pins use a straight bore instead of taper — faster replacement but requires proper plate preparation:
✅ You're in the right place if:
- Your mold has 16+ identical pin positions and changeover time is a production bottleneck
- You want pin-to-pin interchangeability — any pin fits any bore without hand-fitting
- Maintenance crew needs to replace pins without skilled taper alignment
🔄 Consider switching to:
- Fewer than 16 pin positions? → Standard Tapered One-Step Pins may be more economical
- Need gas release with taperless? → Taperless Gas Release Pins
- Need three diameters? → Taperless Two-Step Pins
About Taperless One-Step Pins
In molds with large numbers of stepped core pins, the time to taper-ream each bore becomes a significant cost driver. One-step taperless pins eliminate this — the retention shank fits into a standard straight bore machined by conventional drill and ream operations.
This is particularly valued in high-cavity molds for consumer electronics and automotive connector applications, where 16, 32, or even 64 identical stepped pins must be installed. The cumulative time savings across bore preparation and pin replacement can exceed 30% of total mold build time.
Multiple fit options are available, from standard clearance to tight interference fit. The correct fit depends on the mold's operating temperature range and pin ejection force requirements.
Application Scenarios
See how this product type solves real engineering challenges across different industries and applications:
Quick Mold Changeover Production
Pain point: High-mix, low-volume production requires frequent mold changes. Traditional tapered head core pins need the mold to be fully disassembled from the rear to replace a damaged pin — costing hours of downtime.
Why it fits: Taperless one-step core pins slide out from the cavity side without rear plate disassembly. Pin replacement drops from 2-4 hours to 15-30 minutes, dramatically reducing unplanned downtime cost.
Multi-Cavity High-Volume Tools
Pain point: In 32-64 cavity molds, any single broken pin stops the entire mold. With tapered pins, replacing one pin means disassembling the entire rear plate stack — affecting all cavities.
Why it fits: Taperless front-loading design allows individual pin replacement without disturbing adjacent cavities. This is critical for 24/7 production environments where every minute of downtime costs $500+.
Packaging Mold Rapid Maintenance
Pain point: Packaging closures run at extreme cycle speeds (3-6 second cycles) with 48-96 cavities. Pin wear is accelerated, and traditional replacement procedures cannot keep pace with production demands.
Why it fits: Taperless pins enable scheduled maintenance during short production breaks. The one-step profile simplifies alignment during reinsertion, reducing maintenance error rates in high-cavity tools.
Related Categories
Frequently Asked Questions
Taperless vs tapered advantages?+
What fit options?+
Flat-sided available?+
Engineering Resources
Case Studies
Need a Custom Quote?
Send your specifications — material, dimensions, quantity — and receive a quote. MOQ: 1 piece. Custom dimensions available.