山一特殊合金株式会社 List of Products and Services

We offer "copper alloy casting." High-strength brass contains about 30% zinc, and when melted, zinc fumes scatter into the air. Even with dust collection systems, it cannot be completely removed, leading to air pollution. In recent years, the number of manufacturers has decreased due to environmental protection concerns, and there are increasing cases of switching to other materials. CAC702 can solve these problems! Aluminum bronze casting "CAC702" is hard and tough, making it well-suited for use in ship propellers, gears for reduction gears, and bushings for mechanical parts. *For more details, please refer to the PDF materials or feel free to contact us.

• Casting Machine

We would like to introduce the "Frequently Asked Questions" related to our special alloy. We answer various questions, starting with "What is casting?", "What materials can be produced?", "Can you make just one piece for prototypes or orders?", "What about hardness testing?", and more. For more details, please download and view the catalog. 【Frequently Asked Questions (Partial)】 ■ What is casting? ■ Can you make just one piece for prototypes or orders? ■ What materials can be produced? *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing
• Prototype Services

Here is an example of the production of "low-friction material for pistons" using special copper alloy castings. KJ4, as well as CAC605 and CAC606, are also available. 【Production Example】 ■Lead copper ring ■Material: KJ3 (Kermet) ■38×20×245 *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

We would like to introduce a case study of the production of a "press spindle bearing" using a special copper alloy casting material. 【Production Case】 ■Material: HL Bronze (CAC606) ■Outer Diameter: φ313 ■Inner Diameter: φ257 ■Height: 123 ■Weight: 26kg *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Here is an example of the production of a "curved pull pulley" using aluminum bronze as the material. 【Production Example】 ■φ90×φ36.9×26t ■ALBC2 *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

We would like to introduce a case study of the production of a "movable contact base" using bronze casting as the material. 【Case Study】 ■Material: BC3 ■Weight: 0.5kg *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Here is an example of the production of a "power supply bar" made using bronze casting as the material. 【Production Example】 ■BC6 ■455×60×37 *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Here is an example of a "hinge" made using phosphor bronze as the material. 【Production Example】 ■Material: CAC502 ■54×13×210 *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Here are examples of the production of "round bars" using aluminum bronze/lead bronze castings as materials. 【Production Examples】 ■φ85×300L, 13kg, two types of aluminum bronze (ALBC2) ■80×300L, 15kg, LBC4 ■φ50×300L, 150L, 100L, CAC604 *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Here is an example of a creation using aluminum bronze for a "clip." 【Creation Example】 ■Material: CAC703 *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Here is an example of the production of a "bush" made using aluminum bronze as the material. 【Production Example】 ■Material: CAC702 ■Name: Bush ■φ85×φ70×175t *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Here is an example of the production of a "Valve Pin" using bronze casting materials. It can be applied to various uses such as bearings, sleeves, bushings, pump bodies, impellers, valves, gears, ship portholes, and electric equipment parts. It has good pressure resistance, wear resistance, mechanical properties, and corrosion resistance. 【Features】 ■ Material: BC3/BC6 ■ Manufacturing method classification: Sand casting, die casting, centrifugal casting, precision casting ■ Alloy characteristics: Good pressure resistance, wear resistance, mechanical properties, and corrosion resistance *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Here is an example of producing a "lever" using bronze castings as the material. It can be applied to valves, pump bodies, impellers, water supply faucets, bearings, sleeves, bushings, general machine parts, landscape castings, art castings, and more. It has good pressure resistance, wear resistance, and castability. 【Features】 ■ Material: BC6 ■ Manufacturing method classification: Sand casting, die casting, centrifugal casting, precision casting ■ Alloy characteristics: Good pressure resistance, wear resistance, and castability *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

We would like to introduce a case study of a "valve" made using bronze castings as the material. It can be applied to various uses such as valves, water supply faucets, bearings, sleeves, bushes, and general machine parts. It excels in pressure resistance, wear resistance, machinability, and castability. 【Features】 ■Material: BC6 ■Characteristics of the alloy: Excellent in pressure resistance, wear resistance, machinability, and castability. *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Here is an example of the production of a "piston" made using phosphor bronze as the material. 【Production Example】 ■PDC2 Piston ■Outer Diameter: φ262 ■Inner Diameter: φ58 ■Height: 139 *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Here is an example of the production of a "piston ring" using phosphor bronze as the material. 【Production Example】 ■PBC2 ■φ77×φ65×4.2 *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Here is an example of the production of "marine rings" using lead bronze castings. 【Production Examples (Excerpt)】 ■LBC4, φ301×φ228×33.5t, Weight: 5kg ■LBC4, φ255×φ214×12.5t, Weight: 1.8kg ■LBC4・RT48T Scraper R ・Outer diameter: φ221.5 ・Inner diameter: φ180 ・Height: 34.5 ・Weight: 2.5kg *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

We would like to introduce a case study of the production of "marine rings" using four types of lead bronze castings (LBC4). The manufacturing methods are classified into sand casting, die casting, centrifugal casting, and precision casting. We have produced items suitable for high surface pressure bearings, which have good compatibility, as well as those with better compatibility than CAC603. 【Features】 ■ Manufacturing method classification: sand casting, die casting, centrifugal casting, precision casting ■ Characteristics of the alloy - Suitable for high surface pressure bearings, with good compatibility - Better compatibility than CAC603 *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Here are examples of the production of "worm wheels" made using aluminum bronze/phosphor bronze materials. 【Production Examples (Excerpt)】 ■ALBC2, φ269×φ180×84t, Weight: 15kg ■ALBC2, φ280×φ150×121t, Weight: 20kg ■ALBC2, φ445×φ306×90t, Weight: 50kg ■ALBC2, φ100×φ70×20t, Weight: 0.8kg ■CAC702 ■PBC2 *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Our company offers "casting of copper alloys." High-strength brass contains about 30% zinc, and when melted, zinc fumes scatter into the air. Even with dust collection systems, it cannot be completely removed, leading to air pollution. In recent years, the number of manufacturers has decreased due to environmental protection concerns, and there are increasing cases of switching to other materials. With CAC702, these problems can be solved. *For more details, please refer to the PDF materials or feel free to contact us.*

• Casting Machine

Our company offers "casting of copper alloys." High-strength brass contains about 30% zinc, and when melted, zinc fumes scatter into the air. Even with dust collection systems, it cannot be completely removed, leading to air pollution. In recent years, the number of manufacturers has decreased due to environmental protection concerns, and cases of switching to other materials are increasing. With CAC702, these problems can be resolved. *For more details, please refer to the PDF materials or feel free to contact us.

• Casting Machine

Our company offers "casting of copper alloys." CAC702 (ALBC2) has high strength, excellent wear resistance, and corrosion resistance, and is used in marine propellers, gears, etc. However, the yield rate is poor, and the material is difficult to process, so there are few manufacturers capable of handling it. Our company solves these various issues through our unique manufacturing know-how, and we have received high praise from customers, especially in the production of worm gears. 【Features】 ■ CAC702 (ALBC2) has high strength, excellent wear resistance, and corrosion resistance. ■ We have received high praise from customers, particularly in the production of worm gears. *For more details, please refer to the PDF materials or feel free to contact us.

• Casting Machine

We offer "copper alloy casting." Leveraging over 50 years of experience and casting technology cultivated since our founding, we propose manufacturing methods tailored to various customer needs. We can utilize both sand molds and metal molds in-house while considering the balance between cost and quality. Please feel free to consult with us. 【Features】 ■ Proposing manufacturing methods tailored to various customer needs ■ Ability to utilize both sand molds and metal molds in-house while considering the balance between cost and quality *For more details, please refer to the PDF document or feel free to contact us.

• Casting Machine

Our company offers "casting of copper alloys." For example, by changing the material of the wheel axle part to FC (cast iron) and performing integrated casting, the weight of the copper alloy portion is reduced, leading to a decrease in price. Additionally, the yield rate improves, and defects specific to castings are significantly reduced. By adopting this method, a cost reduction of approximately 20-30% in product price can be achieved. 【Features】 ■ Change the material of the wheel axle part to FC (cast iron) and perform integrated casting - The weight of the copper alloy portion is reduced, leading to a decrease in price - The yield rate improves, and defects specific to castings are significantly reduced - A cost reduction of approximately 20-30% in product price can be achieved *For more details, please refer to the PDF document or feel free to contact us.

• Casting Machine

We accept "copper alloy casting" at our company. Leveraging over 50 years of experience and casting technology cultivated since our founding, we propose manufacturing methods tailored to various requests. Our company specializes particularly in the casting of CAC604. CAC604 (LBC4) is enhanced for wear resistance and is used in load-bearing bearings and marine engine rings. We have a strong track record of supplying major ring manufacturers, and we are confident in our ability to produce ring shapes. You can trust us with any inquiries regarding copper alloy casting. 【Features】 ■ Cost reduction is possible ■ Ability to use both sand molds and metal molds ■ Particularly skilled in casting CAC604 ■ Proven track record with major ring manufacturers ■ Also handle CAC702 *For more details, please refer to the PDF document or feel free to contact us.

• Casting Machine

Aluminum bronze is made from copper as the base material, with 8-11% aluminum and small amounts of iron, nickel, and manganese added. Its chemical and mechanical properties are exceptionally excellent. Yamachi Special Alloys primarily focuses on the casting of aluminum bronze, specializing in 80% of our production capacity. 【Features】 - The weight of the material is reduced, making it an economical choice considering its durability. - It has good oil retention and excellent wear resistance. - It is superior in both structural and chemical resistance to acids and seawater. - The structure is dense and uniform, providing excellent water pressure resistance. - Aluminum bronze does not lose its properties even at considerable high temperatures. *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

We would like to introduce the bronze cast valves manufactured by our company. The material is BC6, which has excellent pressure resistance, wear resistance, machinability, and castability characteristics. In addition to valves, it is suitable for applications such as water supply faucets, bearings, sleeves, bushes, and general machine parts. 【Product Overview】 ■ Material: BC6 ■ Alloy Characteristics: Excellent pressure resistance, wear resistance, machinability, and castability *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

We would like to introduce the bronze cast lever manufactured by our company. The manufacturing methods include sand casting, die casting, centrifugal casting, and precision casting. The material is made of BC6. It features good pressure resistance, wear resistance, and castability, making it suitable for applications such as valves, pump bodies, impellers, and water supply faucets. 【Product Overview】 ■ Material: BC6 ■ Manufacturing method classification: sand casting, die casting, centrifugal casting, precision casting ■ Alloy characteristics: good pressure resistance, wear resistance, and castability *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

We would like to introduce four types of ship rings "LBC4" made from lead bronze castings. The manufacturing methods include sand casting, die casting, centrifugal casting, and precision casting. This alloy has better compatibility than CAC603. It is suitable for applications such as medium-speed and medium-load bearings, vehicle bearings, and backing metal for white metal. 【Product Overview】 ■ Manufacturing methods: sand casting, die casting, centrifugal casting, precision casting ■ Alloy characteristics: better compatibility than CAC603 *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

We would like to introduce four types of ship rings "LBC4" made from lead bronze castings. The manufacturing methods are classified into sand casting, die casting, centrifugal casting, and precision casting. They possess the characteristics of being suitable for high surface pressure bearings and having good compatibility. They are suitable for applications such as medium to high-speed bearings and large engine bearings. 【Product Overview】 ■ Manufacturing method classification: sand casting, die casting, centrifugal casting, precision casting ■ Alloy characteristics: suitable for high surface pressure bearings and good compatibility *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Our company primarily engages in the casting and processing of products made from copper alloys, specializing in prototyping, small lot production, and a variety of low-volume manufacturing.

• Casting Machine