Core Pins
Precision core pins for injection molds — straight, stepped and taperless types, high-wear steel grades, ±0.002 mm positional accuracy, standard and custom diameters with fast turnaround.
Why Core Pins
Precision core pins for injection molds — straight, stepped and taperless types, high-wear steel grades, ±0.002 mm positional accuracy, standard and custom diameters with fast turnaround.
- Straight, stepped and taperless core pin types
- High-wear grades with optional coating
- ±0.002 mm positional accuracy from jig grinding
- Interchange dimensions to international standards
- Custom diameters and lengths per drawing
- MOQ 1 piece with 3–7 day standard lead time
APPLICATION
Core Pins in Real Mold Applications
Connector Housings
Multiple small through-holes demand stepped cores with tight positional accuracy.
Bosses and Ribs
Taperless cores eject cleanly from deep blind bosses without sticking.
Threaded Inserts
Precision cores position and hold threaded inserts during molding.
FAQ
Questions Buyers Ask
What is the difference between a core pin and an ejector pin?
A core pin forms the internal geometry of a part (holes, bosses, cavities). An ejector pin pushes the finished part out of the mold. We supply both.
What steels do you use for core pins?
SKD61 and SKD11 are standard, with coated options for abrasive resins. Higher-alloy grades available for demanding applications.
Can you make custom core pins?
Yes — custom diameters, steps, lengths and shapes machined to your drawing with full dimensional report.
What tolerances can you hold?
Diameter grinding to ±0.002 mm; positional accuracy verified on CMM before shipment.
How fast can you deliver?
Standard series 3–7 days; custom core pins 7–15 days depending on heat treatment.