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This section provides an overview for core pins as well as their applications and principles. Also, please take a look at the list of 8 core pin manufacturers and their company rankings. Here are the top-ranked core pin companies as of August, 2025: 1.PUNCH INDUSTRY USA INC., 2.Metalloy, 3.Ay-Mac Precision Inc.
Table of Contents
A core pin is one of the parts of a mold. It is necessary when making shapes, such as "holes" and "bosses for screw fixation." The core pin, however, is only a part of creating shapes and does not move, remaining fixed in place even when the mold is opened.
Core pins are used in molds for molding parts that have shapes, such as "holes" and "bosses for screw fixation". Since the number of core pins required is equal to the number of "holes" and "bosses for screw fixation," a large number of core pins are used in molds for parts used in products with many screw fixations. For small precision products, the core pins are also very thin, so care must be taken to avoid damage during molding.
A rod (pin) shaped part is made according to the diameter and depth of the shape that needs to be molded and is used as a part of the mold component. If the hole itself is deep or the hole itself is deep in the mold shape, the core pin itself needs to be long, making it more difficult to make. If a very long core pin is required, a thicker diameter may be used up to the middle of the pin to ensure strength and only the tip shape may be made to the required narrow diameter. Also, because there is a limit to the minimum distance between adjacent core pins, care must be taken when designing parts that require "holes" or "bosses" in close proximity to each other.
The core pin is a simple shape among mold parts, but due to the characteristics of the processing method of shaving metal, once the core pin is fabricated, "reducing the hole (boss) diameter" may be handled by shaving the core pin again to make it thinner, but "increasing the hole (boss) diameter" requires the core pin to be thickened, which is very difficult to do. However, "enlarging the hole (boss) diameter" is very difficult because the core pin needs to be thickened, and in the worst case, the core pin will need to be remade. Therefore, when designing a part for which "there is still a possibility of adjusting the hole or boss diameter," it is often more cost and time efficient to first make a mold with a larger hole (boss) diameter and then make fine adjustments in the direction of a smaller diameter.
*Including some distributors, etc.
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Hommer Tool & Mfg. Inc. was founded in 1983 and the facility is in Arlington Heights, Illinois. The company is a manufacturer of custom mold-ready components for automotive die casting and plastic injection molds. The company mainly serves medical, dental, pharmaceutical, industrial, consumer product packaging, and automotive die casting industries with square and round mold components including custom cores & pins, die cast tooling, rotating core, cavity & core blocks, as well as thin-walled ejector sleeves that are manufactured with the exact precision in every step of their production process.
PUNCH INDUSTRY USA INC. is a manufacturer that specializes in precision tools and machinery solutions which is headquartered in the USA. The company specialize in automotive parts and assemblies, electronic connectors, and aerospace components, by delivering excellent products for various businesses. With an intention to deliver excellent products and services, The company has established itself as a dependable partner for clients worldwide and allegiance to engineering expertise and customer satisfaction allows them to consistently provide cutting-edge solutions that meet the diverse needs of customers.
Metalloy was founded in 1969 and is based in St. Charles, Illinois. Metalloy is a distributor of industrial and construction supplies. Metalloy offers tube & pipe products, PVF, die sets & plates, die & mold tooling, general tooling, steel storage, and SK hand tools. Tube & tube products include mechanical tubing, stainless steel tubing, and piping. PVF includes piping, fittings, flanges, valves, studded outlets, and machined rings. Die sets & plates include parallels, risers, and steel tools. Die & mold tooling include die punches, die buttons, drill busings, and mold components.
AY-Mac precision Inc., an American-based company with its head office in Windsor, Colorado, specializes in manufacturing precision core pins for multiple industries since 1985. The company serves aerospace, petroleum, defense, and medical industries with sleeves, precision test pins, stuffer pins, loader pins, ejector blades & pins, as well as core pins for plastic and rubber modelling. Grinding equipment and traditional machine tools which have been customized to meet specialized requirements and manufacturing process are also available. To reduce customers’ cost and improve the production performance and life of the pins, the company offers design advice, delivery, and consultation services.
HG Precision Component Co., Ltd., is located in Foshan City Guangdong Province, and is a manufacturer of precision connector mold parts, precision plastic mold parts, auto connector mold parts, and many more. The product portfolio of the company includes Mold Core Pins, CNC Machinery Parts, Precision Mold Parts, Precision Sprue Bush, EOE Tooling and Parts, and more. The company responds to any requests for a development project, test production, or collaborative research from its clients. The company has precision measuring machines to handle various measurements.
EISEN Co.Ltd., established in 1972 and based in Higashiōmi, Japan, is a manufacturer and supplier of precision tools and equipment. The company's product portfolio includes pin gauges, screw gauges, precision vises, diamond tools, and jigs and tools. These tools are applied in various industries, including electronics, medical devices, metalworking, woodworking, and tool and die making. The company is ISO 9001 certified for quality control and assurance according to international standards for quality management.
Ranking as of August 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | PUNCH INDUSTRY USA INC. |
27.8%
|
| 2 | Metalloy |
18.1%
|
| 3 | Ay-Mac Precision Inc |
16.7%
|
| 4 | Hommer Tool & Mfg., Inc, |
13.9%
|
| 5 | HG Precision Component Co.,Ltd |
11.1%
|
| 6 | EISEN Co.Ltd. |
8.3%
|
| 7 | CHAMPION CORPORATION Co., Ltd. |
2.8%
|
| 8 | Miyanaga Co., Ltd. |
1.4%
|
Derivation Method
The ranking is calculated based on the click share within the core pin page as of August 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
4 | 57.1% |
|
Japan
|
2 | 28.6% |
|
China
|
1 | 14.3% |
56 products found
56 products
CHAMPION CORPORATION Co., Ltd.
290+ people viewing
Last viewed: 2 hours ago
This is a core pin made by Becu.
CHAMPION CORPORATION Co., Ltd.
260+ people viewing
Last viewed: 16 hours ago
A needle pin with a tip diameter of φ0.28.
CHAMPION CORPORATION Co., Ltd.
230+ people viewing
A long stepped center pin.
Cell Japan Co., Ltd.
440+ people viewing
■What is a self-clinching fastener? Self-clinching fasteners are fasteners that obtain fixing force through pressing. A type of nut that functions ...
CHAMPION CORPORATION Co., Ltd.
330+ people viewing
Last viewed: 1 day ago
Guide pin for injection molds.
Sanwa Creation Co., Ltd.
450+ people viewing
Last viewed: 39 minutes ago
Try the pin shaft born from our micron -Submicron accuracy technology. It is used in various fields such as cars, communication, semiconductors, an...
Yatsugane Kogyo Co., Ltd.
240+ people viewing
Last viewed: 15 hours ago
■Features 1.Achieving a long accuracy guarantee period by taking advantage of the characteristics of carbide materials ・Realizes a gauge with exce...
CHAMPION CORPORATION Co., Ltd.
280+ people viewing
Last viewed: 1 day ago
TD-VC processing. There is a Φ4 water hole of about 200mm.
CHAMPION CORPORATION Co., Ltd.
320+ people viewing
Last viewed: 17 hours ago
This is a φ50 guide pin. Induction hardening.
CHAMPION CORPORATION Co., Ltd.
210+ people viewing
Last viewed: 1 day ago
This is a pin with a tip diameter of φ0.51.
NITTOSEIKO CO., LTD.
830+ people viewing
Last viewed: 5 hours ago
We provide products related to the conclusion method other than the screw. In addition, we also provide bits corresponding to cross -holes and our ...
Bosei Captive Co., Ltd.
280+ people viewing
Last viewed: 18 hours ago
■Features ・Easy positioning by press-fitting ・Corner punching is also possible because bulges do not easily appear at the edge of the board after...
Seiko Drill Co., Ltd.
220+ people viewing
Last viewed: 1 day ago
■Product overview We are good at small diameter sizes of φ1.0 or less. Also available in stepped shapes.
Seiko Drill Co., Ltd.
200+ people viewing
■Product overview We are good at small diameter sizes of φ1.0 or less. We can handle everything from one piece to mass production.
Seiko Drill Co., Ltd.
190+ people viewing
Last viewed: 10 hours ago
■Product overview The surface roughness of the spherical part is finely finished.
Seiko Drill Co., Ltd.
230+ people viewing
■Product overview Not only D-cut and I-cut, but also 4-sided and 8-sided cuts are available.
Seiko Drill Co., Ltd.
210+ people viewing
■Product overview Halving processing that does not shift the surface is our unique technology.
Seiko Drill Co., Ltd.
180+ people viewing
Last viewed: 1 day ago
■Product overview Available from tip diameter 0.03. The smaller the diameter, the better it is.
Seiko Drill Co., Ltd.
190+ people viewing
Last viewed: 1 day ago
■Product overview Small diameter pins with an extremely short overall length can only be seen here. Small diameter pins with a total length of 1 mm...
Katayama Chain, Co., Ltd.
140+ people viewing
Fix the roller chain and hit the pin removal head with a hammer to remove the chain pin.
Seiko Drill Co., Ltd.
190+ people viewing
■Product overview Small diameter pins with medium flanges that are extremely short in overall length can only be seen here. You can have absolute c...
Seiko Drill Co., Ltd.
180+ people viewing
Last viewed: 4 hours ago
■Product overview Small diameter pins with extremely short overall length and double radius can only be seen here. We have absolute confidence in t...
Sanwa Creation Co., Ltd.
240+ people viewing
■Product overview Core pins and center pins used in injection molds. In addition to being used to mold resin parts for medical and semiconductor ap...
Kuroda Co., Ltd.
700+ people viewing
■Summary ・Custom guide pin/bush Please contact us for small lots. (Taper/Super mirror finished parts/Submicron guaranteed parts, etc.) ・Rubber co...
10 models listed
Kuroda Co., Ltd.
500+ people viewing
Last viewed: 5 hours ago
■Material SUJ2 heat treatment hardness 58°～60° *Other product numbers are available.
10 models listed
Yamaichi Special Alloy Co., Ltd.
140+ people viewing
Last viewed: 2 hours ago
■Classification of manufacturing methods Sand casting/mold casting/centrifugal casting/precision casting ■Characteristics of alloy Good pressure r...
Alpha Co., Ltd.
270+ people viewing
Last viewed: 18 minutes ago
■Push pin ・The heat sink and the board are fixed with push pins, and the heat sink is held by the tension of the spring. It is one of the most pop...
Kuroda Co., Ltd.
170+ people viewing
Last viewed: 1 day ago
■Material SKH-51 ■Hardness 59~61HRC
Seiko Drill Co., Ltd.
220+ people viewing
■Product overview We are good at small diameter sizes of φ1.0 or less. The surface roughness of the tapered part is finely finished.
Yamazaki Co., Ltd.
130+ people viewing
Last viewed: 18 hours ago
The color of the photo may differ from the actual product color. Product code: D000011A0040008000 Packing quantity: 1,000 pieces (number of small...
