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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 - Page 2
56 products - Page 2
Yamazaki Co., Ltd.
120+ people viewing
Last viewed: 1 day ago
The color of the photo may differ from the actual product color. Product code: D002010A0010004000 Packing quantity: 1,000 pieces (quantity in 1 s...
Yamazaki Co., Ltd.
110+ people viewing
The color of the photo may differ from the actual product color. Product code: D00001AB0010004000 Packing quantity: 1,000 pieces (quantity in 1 s...
Yamazaki Co., Ltd.
80+ people viewing
Last viewed: 1 day ago
The color of the photo may differ from the actual product color. Product code: D00201260001002000 Number of packages: 30 pieces (Quantity in 1 sm...
