東京精密鍛造 List of Products and Services

This document includes examples of manufacturing, primarily focusing on automotive suspension components, highlighting the benefits of forging such as cost reduction and weight savings. Our company has over 80 years of experience and expertise in manufacturing a wide variety of hot-forged products, including automotive parts, construction machinery parts, and industrial machinery parts. In the case studies, we present photos of the manufactured items along with customer challenges and our solutions. The focus is mainly on automotive parts and four-wheel drive switching components. The content is designed to be easy to reference, so please feel free to download and take a look. [Partial Content] ■ Forming complex groove shapes that are difficult to achieve with forging! Guaranteeing internal hardness of 15-25 HRC! ■ Producing protrusions of 8mm width through forging! Reducing product costs by 25%! ■ Using insert molds to reduce material costs by 85%! Reducing mold costs by 30%! *For more details, please download the PDF or feel free to contact us.

• Processing Contract

◆Reducing processing time by using the square flange part in its forged shape ▼Product Name Cap Knuckle Tokyo Seimitsu Tanzo Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture, 300-2727 TEL: 0297-42-4631 FAX: 0297-42-4634 HP: https://www.tokyo-seimitsu-tanzo.co.jp/ Contact: Sales Engineering Department

• Special Steel

◆Improved productivity with multiple forging (2-piece production)!! ▼Product Name Flange (Forklift Parts) Tokyo Seimitsu Tanzo Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture 300-2727 TEL: 0297-42-4631 FAX: 0297-42-4634 HP: https://www.tokyo-seimitsu-tanzo.co.jp/ Contact: Sales Engineering Department

• Other metal materials

◆Reduce processing time by using the four flange sections in their forged shape!! Achieve weight reduction by creating a recessed shape!! ▼Product Name Sprocket Tokyo Seimitsu Tanzo Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture 300-2727 TEL: 0297-42-4631 FAX: 0297-42-4634 HP: https://www.tokyo-seimitsu-tanzo.co.jp/ Contact: Sales Engineering Department

• Steel

◆ By forging the upper and lower oil groove sections, machining time is reduced. Additionally, material costs are reduced through closed die forging, and lightweight holes (8 locations) are formed by forging. ▼ Product Name Gear (GEAR) Tokyo Precision Forging Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture, 300-2727 TEL: 0297-42-4631 FAX: 0297-42-4634 HP: https://www.tokyo-seimitsu-tanzo.co.jp/ Contact: Sales Engineering Department

• gear

◆The protrusions of the coupling are shaped by forging. In machining, processing the two protrusions requires a lot of man-hours, so they are shaped by forging. In forging, it is difficult to shape the two protrusions, and defects such as insufficient thickness are likely to occur, but shaping is achieved by devising the forging process. ▼Product Name Coupling (COUPRING) Tokyo Seimitsu Tanzo Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture 300-2727 TEL: 0297-42-4631 FAX: 0297-42-4634 HP: https://www.tokyo-seimitsu-tanzo.co.jp/ Contact: Sales Engineering Department

• Other machine elements

◆The flange part spreads radially in an irregular shape relative to the shaft part, making it difficult to mold the product. The shaft part is shaped by forging into a form resembling a palm. By processing only the upper and lower surfaces and the shaft part while using the rest in its forged shape, it achieves near-net shape. ▼Product Name Bracket Fan (BRACKET FAN) Tokyo Seimitsu Tanzo Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture, 300-2727 TEL: 0297-42-4631 FAX: 0297-42-4634 HP: https://www.tokyo-seimitsu-tanzo.co.jp/ Contact: Sales Engineering Department

• Other machine elements

Successfully achieved near-net shape by using the shape formed by hot forging as is." "Successfully achieved near-net shape by using the hot forged shape for parts such as flanges!!" "Realized weight reduction by forming the flange part into a non-standard shape!!" "Product Name: Bearing Cage (BEARING CAGE)" "Tokyo Seimitsu Tanzo Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture 300-2727 TEL: 0297-42-4631 FAX: 0297-42-4634 HP: https://www.tokyo-seimitsu-tanzo.co.jp/ Contact: Sales Engineering Department

• Other machine elements

▼Issues - We want to bend the workpiece without cutting the flow lines to maintain the strength of the product. - Normally, molds are used to bend the workpiece, but this increases the size and cost of the product. ▼Solutions - By using a bending machine to bend the workpiece, we can reduce mold costs by 20%. - We adjusted the shape of the central pivot, the length of the workpiece to be bent, and the angle, allowing the bending machine to be used in the forging bending process. ▼Specifications Material: MCB240H Weight: 6.45 kg Dimensions: 80 × 220 × 260 mm Accuracy: -0.5 to +1.5 mm Equipment: 3-ton air stamp hammer Quantity: 1 to 200 pieces/month ▼Molds We handle everything from mold design to mold manufacturing and maintenance in-house. Not only can we produce forged products, but we can also take on mold design, ensuring the accuracy of the products. Tokyo Precision Forging Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture 300-2727 TEL: 0297-42-4631 FAX: 0297-42-4634

• Other Auto Parts

▼Issues - It is necessary to create lightweight holes (Φ20mm x 8 holes) in the inner diameter of the gear. - Due to the thick wall and narrow spacing between the holes, deformation is likely to occur when drilling the holes. ▼Solutions - By clamping the product with a die during molding, we prevented deformation during hole punching. - Simultaneously punching the outer burrs improved production by 10%. - Normally, when punching 8 holes, the material in the gear section deforms and warps, but we solved this issue by innovating the previous process. ▼Specifications Material: SCR420H (steel) Weight: 3kg Dimensions: Φ130 x 148mm Accuracy: -0.5 to +1.5mm Equipment: 2500-ton forging press Quantity: 500 to 16,000 pieces/month ▼Mold We handle everything from mold design to mold production and maintenance in-house. Not only do we manufacture forged products, but we also take on mold design, ensuring product accuracy. Tokyo Precision Forging Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture, 300-2727, Japan TEL: 0297-42-4631 FAX: 0297-42-4634

• Other Auto Parts

▼Issue - We want to reduce machining man-hours by performing the forming of the four cam holes through forging. ▼Solution - Integrated the die for the holes and external burrs, and formed the center hole and cam holes through forging. - Cold-sized the end faces of the four cam holes at a 15° angle, eliminating the machining process. ▼Specifications Material: S45C (Steel) Weight: 3kg Dimensions: Φ147 × 80mm Accuracy: -0.5 to +1.5mm Equipment: 3150-ton forging press Quantity: 100 to 3,000 pieces/month ▼Mold We handle everything from mold design to mold manufacturing and maintenance in-house. Not only do we manufacture forged products, but we also take on mold design, ensuring the precision of the products. Tokyo Precision Forging Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture 300-2727 TEL: 0297-42-4631 FAX: 0297-42-4634

• Other Auto Parts

▼Issue - We want to reduce machining processes by performing the shaping of gear teeth through forging. ▼Solution - Pre-shaping through hot forging and shaping the teeth through cold forging to eliminate the cutting process for the tooth surface!! - Reduction of machining processes through composite forging of hot forging and cold forging. ▼Specifications Material: SCR420H (steel) Weight: 0.5kg Dimensions: Φ103 × 15.5mm Precision: -0.5 to +1.5mm Equipment: 1600-ton forging press Quantity: 100 to 3,000 pieces/month ▼Mold We handle everything from mold design to mold manufacturing and maintenance in-house. Not only do we produce forged products, but we also take on mold design, ensuring the precision of the products. Tokyo Precision Forging Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture 300-2727 TEL: 0297-42-4631 FAX: 0297-42-4634

• Other Auto Parts

▼Issues - We want to manufacture a large number of small products. - We want to keep costs low. ▼Solutions - Since the products are small and the quantity is large, we used a mold that produces 6 pieces at a time. Even with a lower yield, productivity improved by 17%. - We converted the mold to an insert type, reducing the material cost of the mold by 17%. - By only performing hole drilling after forging, we were able to use it as a finished part, reducing the product cost per piece by 25%. ▼Specifications Material: S25C (Steel) Weight: 0.2kg Dimensions: 24 × 51 × 24 mm Accuracy: -0.5 to +1.5mm Equipment: 1.5-ton air stamp hammer Quantity: 3,000 to 15,000 pieces/month ▼Molds We handle everything from mold design to mold manufacturing and maintenance in-house. Not only do we produce forged products, but we also take on mold design, allowing us to maintain product accuracy. Tokyo Precision Forging Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture 300-2727 TEL: 0297-42-4631 FAX: 0297-42-4634

• Other Auto Parts

▼Issues - Warm forged products with a center hole shape. - It's a sudden request, but I would like you to respond. - Cannot request manufacturers without a track record of producing constant velocity joints (we have a track record). - A production capacity of 40,000 pieces/month is required. ▼Solutions - Proposed forming the center hole through forging. - Manufactured using hot forging, shaping the center hole at the tip of the shaft and inside the cup. Reduced machining processes. - Other companies attempted but could not achieve it, and it was evaluated as groundbreaking. - Quickly set up equipment in response to the sudden request, achieving a production capacity of 40,000 pieces/month. ▼Specifications Material: S55C Weight: 2.1kg Dimensions: Φ92.5×169.8mm Accuracy: -0.5 to +1.5mm Equipment: 1600-ton forging press Quantity: 1,000 to 40,000 pieces/month ▼Molds We handle everything from mold design to mold manufacturing and maintenance in-house. Not only do we produce forged products, but we also undertake mold design, ensuring product accuracy. Tokyo Precision Forging Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture, 300-2727 TEL: 0297-42-4631 FAX: 0297-42-4634

• Other Auto Parts

▼Issues - For use in electromagnetic clutches, the material used is low carbon S10C. - The flange has a deep groove shape, but it is difficult to achieve depth through forging. - S10C is soft and not suitable for machining. ▼Solutions - Normally, forming can only achieve a depth equal to the width of the groove, but we were able to form a depth twice the width of the groove. - The groove is narrow and deep, which caused the mold to expand, making maintenance and quality checks challenging, but we were able to achieve it. - We were selected because we could form deeper grooves than other companies. ▼Specifications Material: S10C Weight: 2.54kg Dimensions: Φ108×66.2mm Accuracy: -0.5 to +1.5mm Equipment: 1600-ton forging press Quantity: 500 to 10,000 pieces/month ▼Molds We handle everything from mold design to mold manufacturing and maintenance in-house. Not only do we produce forged products, but we also take on mold design, allowing us to maintain product accuracy. Tokyo Precision Forging Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture 300-2727 TEL: 0297-42-4631 FAX: 0297-42-4634

• Other Auto Parts

▼Issues - The oil reservoir (oil groove section) on the flange end face is a difficult shape that is not typically produced by forging. - We want to manufacture it by forging to maintain strength (and reduce costs). - We would like to guarantee an internal hardness of 15 to 25 HRC. ▼Solutions - To shape the groove by forging, we conducted multiple trials to finalize the shape of the previous process. - Regarding the guarantee of internal hardness, we collaborated with the customer and the heat treatment manufacturer to create data on the correlation between surface hardness and internal hardness through product destruction testing. We guaranteed internal hardness based on surface hardness. - Our company was the only one able to guarantee internal hardness with the material S35C for the material shaping of the oil reservoir (oil groove section). ▼Specifications Material: S35C Weight: 1.63 kg Dimensions: Φ113×95.2 mm Accuracy: -0.5 to +1.5 mm (general tolerance) Equipment: 2500-ton forging press Quantity: 100 to 3,000 pieces/month ▼Molds We handle everything from mold design to mold manufacturing and maintenance in-house. Not only do we manufacture forged products, but we also undertake mold design, which allows us to maintain product accuracy. Tokyo Precision Forging Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture, 300-2727, Japan TEL: 0297-42-4631 FAX: 0297-42-4634

• Other Auto Parts

▼Issue - We want to manufacture a difficult shape with two protrusions on the flange end face through forging. - Other companies are reluctant to forge due to poor die life caused by the protrusions. - Machining would lead to high costs. ▼Solution - Since the protrusions are small (R1, width 8mm), there is a tendency for undercuts, but we will address this issue by enhancing the previous processes. - We were able to reduce machining costs. ▼Specifications Material: S48C (steel) Weight: 2.44kg Dimensions: Φ137×103mm Accuracy: -0.5 to +1.5mm (general tolerance) Equipment: 2500-ton forging press Quantity: 200 to 3,000 pieces/month ▼Mold We handle everything from mold design to mold manufacturing and maintenance in-house. Not only do we manufacture forged products, but we also take on mold design, which allows us to maintain product accuracy. Tokyo Precision Forging Co., Ltd. 1858 Osawa, Joso City, Ibaraki Prefecture 300-2727, Japan TEL: 0297-42-4631 FAX: 0297-42-4634

• Other Auto Parts

Our company is committed to improving our technical capabilities by introducing advanced forging simulation, responding to our customers' needs. We have forging equipment including forging presses ranging from 1000 to 3150 tons and air stamp hammers of 1.5 tons and 3 tons, enabling the production of forged products in various shapes and sizes. Primarily, hot forged products are manufactured using die forging. While die forging may have a reputation for being costly in small quantities, we keep costs down by reducing material costs and setup time. 【Features】 ■ Improved yield through closed forging ■ Increased productivity through multiple parts production with presses and hammer forging ■ Processing-free through combined forging of "hot forging + cold forging" *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

Since its establishment over 80 years ago, Tokyo Seimitsu Forging Co., Ltd. has been manufacturing a wide variety of forged products, including automotive parts, construction machinery parts, and industrial machinery parts. In addition to hot forging equipment such as hot forging presses and air stamp hammers, we also possess cold forging equipment. As a result, we are capable of producing composite forged products that combine hot forging and cold forging. Utilizing our extensive experience and technology, along with the newly introduced 3D forging simulation system, we provide products that satisfy our customers. Our company is actively engaged in "reducing CO2 emissions" and has introduced solar power generation equipment in 2023, which covers about 20% of the electricity used in our factory through self-generated power. Additionally, we have contracted for "CO2-free electricity" for the remaining power usage, achieving carbon neutrality (zero CO2 emissions). *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

When comparing the material weight and scrap weight of products machined from round bars versus those machined from forged products, there is a significant difference in the amount of processing required, even if the finished products weigh the same. By incorporating the forging process, substantial cost reductions in both material and processing costs can be achieved. Additionally, by utilizing the flow of the internal structure of the metal, forged flow lines that conform to the shape can be obtained, allowing for the production of strong products and enabling weight reduction. 【Features】 ■ Cost reduction ■ Short delivery times ■ Small lot production *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract