Core Mold Components

Metric mold components for injection-mold building, maintenance and replacement sourcing — ejector and core pins, guide bushings and angle pins, die springs, sprue bushings and locating rings, support pillars, shoulder screws and wear parts. Standard sizes are priced online; anything outside them is made from your drawing.

Materials and hardness we work to

• SKD61 / H13 (JIS G4404) — ejector and core pins, vacuum hardened and nitrided to 60±2 HRC surface over a 42±2 HRC core; through-hardened pins at 60–63 HRC are available where the pin will be cut or reground
• 65Mn — rectangular-wire die springs to the JIS colour system: yellow extra light, blue light and red medium
• 40Cr, 20Cr, SUJ2 and other tool steels for guide, support and wear components, through-hardened or case-hardened depending on duty
• S45C — stop posts, spacers and other parts where toughness matters more than surface hardness
• Grade 12.9 alloy steel for shoulder screws and socket cap screws

Tell us the standard you work to — DIN, JIS, HASCO, DME or a Misumi equivalent — and we quote against it rather than against our own catalogue.

Two standards conflicts worth knowing about

Die spring colours. JIS and ISO 10243 use the same colours for different load classes, and for two colours they are exact opposites: on JIS, yellow is extra light and green is heavy; on ISO 10243, yellow is extra heavy and green is light. A spring ordered by colour alone can arrive several times stiffer or softer than the one it replaces. Specify outside diameter, free length, load class in words, and which standard you mean.

Hardness figures. "60 HRC" on a nitrided pin describes the surface, not the section. A quotation that says only "hardened" without saying surface or through is describing two different parts at two different prices. Ask which.

Metric sizing conventions used here

• Ejector pins: diameter × overall length, in mm
• Die springs: outside diameter × free length
• Shoulder screws: shoulder diameter × shoulder length — not the thread size
• Locating rings: outside diameter – bore × thickness

How to get a quote

• Select the closest product family and give the complete size designation, a drawing, or a reference part number
• State material, treatment, hardness and tolerance — or say "normal practice" and we will quote to it and list our assumptions
• Give quantity, destination and required date

Everything here is supplied by written quotation. Diagrams and descriptions on this site support identification; they do not replace final technical approval. Drawings you send are confidential and are never shared with a third party without your written consent.