HEF DURFERRIT JAPAN List of Products and Services

Our company designs, develops, and manufactures a high-capacity "continuous film deposition system" suitable for surface treatment of metal bipolar plates (separators) for fuel cells, and we offer contract processing coating services. We also provide coating services tailored to output and usage conditions, as well as the development of optimal surface treatments based on customer needs. 【Reasons to Choose Us】 ■ Experts in PVD coating ■ Own dedicated labs and factories for fuel cells ■ Extensive knowledge of the automotive industry ■ Knowledge of continuous coating lines ■ Knowledge of automatic inspection ■ Applicable even under harsh conditions *For more details, please refer to the materials available for download in PDF format. Feel free to contact us with any inquiries.

• Other surface treatment equipment

We would like to introduce the 'ECO-CLIN Process' developed by the HEF Group. This technology allows for the recycling of wastewater and solid waste generated from the gas nitriding treatment line, directly converting it into regenerated treatment salt. At the HEF Group's upcycling sites and Green Centers established around the world, this system minimizes the impact of gas nitriding treatment on the natural resource market while alleviating concerns over raw material procurement. 【Targets】 ■ Ensuring the sustainability of salt bath nitriding treatment technology ■ Achieving zero mineral waste emissions from the nitriding treatment line ■ Minimizing the impact of fluctuations in raw material market conditions ■ Reducing the carbon footprint of salt bath nitriding treatment technology *For more details, please refer to the PDF document or feel free to contact us.

• Surface treatment contract service

HEF utilizes femtosecond laser technology for surface treatment, providing a vertically integrated business solution from research and development to industrialization. The combination of micron-sized and nano-sized processing enables multi-scale texturing. It is possible to work with high-hardness materials such as tungsten carbide as well as delicate materials, ranging from a few nanometers to several hundred micrometers. We modify surface materials to enhance properties such as adhesion, friction, wettability, fine texturing, conductivity, and wave trapping (electromagnetic shielding and absorption), thereby improving performance. 【Features】 ■ Femtosecond laser parameters ■ Multi-shot laser processing process ■ Ultra-fast processing rates ■ Vision system ■ Functionalization of surfaces *For more details, please refer to the PDF document or feel free to contact us.

• Laser marker

We would like to introduce our "Sliding Parts for Material Handling Equipment." The HEF sliding parts "H-Liner Series," used in truck cranes and other applications, are self-lubricating resin bushes, eliminating the need for oil or grease. Since no lubrication work is required, there is no downtime due to bush maintenance. The HEF Group offers reliable solutions based on over 60 years of accumulated research results. Please feel free to contact us. 【Features】 ■ Excellent wear resistance ■ Reduced lubrication frequency ■ Maintenance-free ■ Outstanding load capacity * Performance examples, application cases, and comparisons of bush wear amounts are also available in PDF format. * For more details, please refer to the PDF materials or feel free to contact us.

• Metal bearings
• Other machine elements

The HEF Group has newly entered the strategic field of photonics and will continuously contribute to innovations in surface treatment science. We have acquired three companies: ABRISA Technologies (California, USA), KERDRY (France), and FICHOU (France). The expertise we have cultivated over many years within the group (PVD/PECVD thin films, femtosecond lasers, surface characterization know-how) will surely be applicable in this new field! 【Features】 ■ Compatible from ultraviolet to infrared ■ Precision polishing of various optical materials (flatness λ/20) ■ Support for optimal thin film design tailored to customer needs ■ Capable of film deposition from microchips to precision mirrors over 1.4m ■ Accommodates both single prototype and mass production *For more details, please refer to the PDF document or feel free to contact us.

• Other optical parts
• Contract manufacturing
• Surface treatment contract service

We would like to introduce HEF's salt bath soft nitriding treatment technology suitable for differential components. The nitrided layers generated during the treatment (mainly the diffusion layer) improve mechanical strength and fatigue strength. Additionally, the compound layer formed during the treatment and its surface condition enhance wear resistance. The application and mass production of salt bath soft nitriding treatment for various differential components are progressing, and we have a track record of applications such as "application to differential cases" and "application to differential shafts." Please feel free to contact us when needed. 【Features】 ■ Improvement of mechanical strength ■ Improvement of wear resistance ■ Reduction of treatment costs (compared to electroless Ni plating) *For more details, please refer to the PDF materials or feel free to contact us.

• Other Auto Parts
• Engine parts
• Processing Contract

We offer "Celltes Coating for Fuel Cell Separators," which achieves excellent conductivity and corrosion resistance. Our coatings are compatible with various substrates such as stainless steel, titanium, and aluminum, and we provide gold-based coatings suitable for aerospace applications that can withstand low to high-temperature environments, as well as more cost-effective carbon coatings for automotive applications. 【Features】 ■ Complies with the requirements of the 2020 technical specifications from the U.S. Department of Energy (IA/Peak, IC/Peak, ICR) ■ Designed cleaning, film formation, and inspection equipment tailored to the customer's production process, achieving costs suitable for mass production ■ Developing nitride coatings, oxide coatings, and multilayer coatings *For more details about this coating, please contact us.

• Other Auto Parts
• others

The "Salt Bath Soft Nitriding Treatment Technology (CLIN Process)" is a technique that applies soft nitriding and oxidation thermochemically, strengthening the surface of iron materials with nitrogen and a small amount of carbon in a salt bath. It has a low environmental impact, compliant with REACH regulations, and provides excellent corrosion resistance. When applied to steel components, it can be used as a substitute for stainless steel. It also has high compatibility with sealing materials and is suitable for home appliances such as washing machine shafts and tubes, as well as in the automotive and military fields. 【Features】 ■ Alternative to chrome plating and gas soft nitriding treatment ■ Reduces friction, contributing to lower power consumption ■ No concerns about peeling that exposes the target material ■ Excellent treatment uniformity *For more details, please refer to the materials. Feel free to contact us with any inquiries.

• Surface treatment contract service

The "Salt Bath Soft Nitriding Treatment Technology (CLIN Process)" is a technique that applies soft nitriding and oxidation thermochemically, strengthening the surface of iron materials with nitrogen and a small amount of carbon in a salt bath. It has a low environmental impact, compliant with REACH regulations, and can be used as an alternative to chrome plating. It contributes to improving wear resistance, seizure resistance, corrosion resistance, and fatigue strength in various products such as gas springs, hydraulic cylinders, and brake pistons. We are currently offering explanatory materials that introduce successful alternatives to chrome plating! 【Features】 ■ Closed treatment with no wastewater ■ Excellent corrosion resistance ■ Widely adopted by major automobile manufacturers and construction equipment manufacturers *The materials can be viewed immediately via "PDF Download." Please feel free to contact us for inquiries.

• Surface treatment contract service
• Processing Contract
• Other surface treatment equipment

Introducing the features of sliding components for the steel industry. The sliding components (COD11) used in the continuous casting dummy bar system by HEF have excellent wear resistance and lubricant retention capabilities. Additionally, the use of COD11 bushes has reduced wear by a factor of 1/15 compared to conventional materials. 【Features】 ■ Excellent wear resistance ■ Reduced lubrication frequency ■ Maintenance-free ■ Outstanding heat resistance ■ Wear reduced to 1/15 of conventional materials *For more details, please refer to the PDF document or feel free to contact us.

• Processing Jig

The "PEL Bush" exhibits excellent wear resistance and seizure resistance through its composite surface treatment and the special pattern engraved on the sliding surface. The special pattern engraved on the sliding surface acts as a large grease reservoir, evenly distributing grease throughout the entire sliding surface. Additionally, it captures foreign particles within this pattern, keeping the sliding surface in a constantly clean state. 【Features】 ■ Resistance to seizure and extended lubrication intervals ■ High load capacity ■ Wear resistance under severe operating conditions ■ The surface of the bush treated with a special surface treatment shows high hardness ■ Excellent abrasive wear resistance, seizure resistance, and corrosion resistance *For more details, please refer to the PDF document or feel free to contact us.

• Processing Jig
• Other machine elements

"TESCO Bush" is made of alloy steel with high mechanical strength and is further treated with a composite surface treatment. This surface treatment demonstrates high abrasive wear resistance under extremely harsh operating conditions such as high temperatures and high loads. Additionally, it is made of alloy steel with a hardness of HRC 50 or higher. 【Features】 ■ Excellent sliding characteristics due to the special treatment applied to the surface ■ Extremely high abrasive wear resistance and load-bearing capacity even at high temperatures ■ The sliding surface is finished very smoothly and features a special pattern engraved on it ■ Captures foreign substances within the pattern, keeping the sliding surface in a constantly clean state *For more details, please refer to the PDF document or feel free to contact us.

• Processing Jig
• Other machine elements

The "FAM Bush" is made of manganese steel and exhibits excellent abrasive wear resistance with a special pattern engraved on the sliding surface. The sliding surface has been subjected to mechanical surface hardening treatment to withstand mechanical stress (impact, dust environment) sufficiently. Additionally, it is finished very smoothly with a special pattern engraved. 【Features】 ■ Demonstrates impact resistance ■ Reduces abrasive wear ■ Shows resistance to seizure (even under non-lubricated conditions) ■ Sliding surface has undergone mechanical surface hardening treatment *For more details, please refer to the PDF document or feel free to contact us.

• Processing Jig
• Other machine elements

The "COD11 Bush" is made of aluminum bronze with special treatment, exhibiting excellent oxidation resistance, seizure resistance, and abrasive wear resistance. Compared to brass and other copper alloy bushes, it shows remarkable improvement effects in various applications. Additionally, the special surface treatment applied to the bush achieves high surface hardness, excellent seizure resistance, abrasive wear resistance, and adhesion resistance. 【Features】 ■ Reduction of abrasive wear ■ Improvement of seizure resistance ■ Enhanced load-bearing capacity / Extended lubrication intervals ■ Proper distribution of grease across the entire sliding surface with cross-hatching ■ Maintenance of ideal load distribution within the sliding surface *For more details, please refer to the PDF document or feel free to contact us.

• Processing Jig
• Other machine elements

Our company offers a wide range of "bushings" that cater to various needs, from reasonably priced products to those pursuing high performance. This time, we would like to introduce products that demonstrate stable performance over a long period, even in environments with a large amount of dust, such as mining sites and construction sites. 【Product Lineup】 ◎ "PEL BH Series" Bushings with excellent anti-seizing performance and impact resistance ◎ "FAM Series" Capable of withstanding high loads and exhibiting high wear resistance ◎ "H-Liner Series" Maintenance-free type that can be used without lubrication *We are currently providing materials with durability test data. You can view them from the "Download" section.

• Plastic bearings

The "Tuftride treatment" is a salt bath soft nitriding process that uses a uniquely developed salt bath agent, compliant with the European environmental regulation "REACH." Compared to gas soft nitriding processes that use ammonia gas, it significantly reduces environmental impact. It offers many advantages in surface processing, such as improved wear resistance, corrosion resistance, and seizure resistance, and is adopted by major automobile manufacturers for shafts and ball screws, as well as by construction equipment manufacturers for hydraulic pistons. ★ We are currently offering a technical explanation document for free ★ [Contents of the document] ■ What is Tuftride treatment and QPQ treatment ■ Composition and thickness of the nitrided layer ■ Improvement of component characteristics and mechanical sliding properties ■ Plant technology ■ Consideration for the environment, etc. * The technical explanation document can be viewed via the download button below.

• Surface treatment contract service
• Processing Contract
• Other surface treatment equipment

The "H-Liner Series" features resin bushes with excellent sliding properties. Since they can be used without lubrication, maintenance tasks such as oiling can be significantly reduced. They can be used in environments where the use of lubricants and the generation of metal wear particles are not allowed, and they demonstrate high wear resistance even under high loads, capable of withstanding dynamic surface pressures of up to 140 MPa. They are expected to be utilized in food and pharmaceutical factories, as well as battery manufacturing facilities, and the high-temperature resistant "SHT" can also be used in ovens and sterilizers. 【We can solve the following issues】 ◎ Do not want to use lubricating oil for hygiene management ◎ Do not want to generate metal wear particles due to sliding and wear ◎ Want to reduce the frequency of maintenance *For product details, please refer to the materials. Feel free to contact us with any inquiries.

• Plastic bearings

"PEL BH" is a spherical sliding bearing that features a multi-layer surface treatment on each part, providing high surface hardness, automatic self-aligning capability, wear resistance, and seizure resistance. Grease reservoirs are provided between the inner ring and outer ring, as well as between the inner ring and pin/shaft, to maintain lubrication. It demonstrates high adaptability to misalignment. It is particularly effective in harsh locations with heavy loads, such as construction machinery and special vehicles, and has been adopted in subway vehicles in Tokyo. 【Features】 ■ High adaptability to misalignment ■ Excellent wear resistance, seizure resistance, and corrosion resistance ■ Outstanding overload resistance, abrasive wear resistance, and impact resistance ■ Requires almost no maintenance *The materials can be viewed immediately via [PDF Download]. Please feel free to contact us with any inquiries.

• Plastic bearings

"CERTESS CARBON" is a coating primarily composed of amorphous carbon. It exhibits high hardness along with excellent abrasive wear resistance and anti-adhesive wear properties. Additionally, it demonstrates an extremely low friction coefficient, contributing to the reduction of CO2 emissions from vehicles through the performance enhancement of automotive parts. This product can be coated at low temperatures, eliminating the need for processes to correct deformations (distortions) that occur at high temperatures, thus leading to a reduction in labor hours. Moreover, it does not become soft, making it suitable for the molding of plastics and rubber, molds, as well as automotive and machine parts. 【Features】 ■ High hardness ■ Excellent abrasive wear resistance ■ Excellent anti-adhesive wear properties ■ Extremely low friction coefficient *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

• Processing Contract

Founded in 1953 in France as the Tribology Research Center, the H.E.F Group has developed numerous technologies related to surface treatment processing of materials, obtained patents, and sold licenses worldwide. Furthermore, in recent years, it has also developed surface treatment processes for resin housings and added electromagnetic shielding coating services to its lineup. The company is expanding its business globally. The H.E.F Group has both research and development and manufacturing facilities, allowing for customization to meet customer needs. The H.E.F Group places importance on establishing a presence close to its clients and has many factories around the world. In Japan, HEF DURFERRIT JAPAN Co., Ltd. collaborates with three domestic factories to meet the needs of Japanese customers. 【Service Introduction】 ○ Contract research services related to tribology ○ Salt bath soft nitriding treatment services ○ PVD and PACVD coating services ○ Manufacturing and sales of bushes and sliding components For more details, please contact us or download the catalog.

• Surface treatment contract service
• Processing Contract

The HEF Group is a worldwide leader in environmentally conscious "nitriding treatment." HEF applies CLIN (Control Liquid Ionic Nitriding) technology, which conducts environmentally friendly nitriding treatment by controlling liquid ions. Hard chrome plating can be replaced with soft nitriding treatment. 【Features of HEF Nitriding Treatment】 ○ Excellent corrosion resistance ○ High wear resistance ○ Environmentally friendly process For more details, please contact us or download the catalog.

• Surface treatment contract service
• Processing Contract

1. What is nitriding treatment: Nitriding is a process that involves permeating nitrogen ions into the surface of materials such as steel and titanium alloys to harden them. By allowing nitrogen ions to penetrate the metal, nitrides of the added elements in the base material (Cr, Al, Mo) are formed (CrN, AlN, Mo2N), creating a hard compound layer. The hardness of this compound layer depends on the amount of these additives, exceeding Hv1200 in alloy steels. There are methods that utilize salt baths, gas atmospheres, or ion environments. 2. Characteristics of salt bath soft nitriding treatment: - Unlike carburizing and high-frequency quenching, there is minimal deformation after treatment, eliminating the need for subsequent polishing. - There is no reduction in fatigue strength after treatment, as seen with hard Cr plating or zinc plating. Nitriding treatment not only improves resistance to galling, wear, and corrosion but also enhances fatigue strength. - In gas and ion nitriding, for complex-shaped parts, gases and ions may not circulate uniformly along the part's shape, leading to uneven nitriding. In a salt bath, abundant nitriding ions circulate uniformly over the entire surface of the part, forming a consistent nitriding layer. A dense and tough nitrided compound (ε-iron nitride) layer improves sliding properties. A porous layer of a few micrometers at the very surface retains lubricating oil, ensuring favorable sliding conditions. 3. Characteristics of Tuftride and QPQ: - Compliant with REACH regulations, zero use of toxic substances, and zero wastewater (all solid waste).

• Other Auto Parts
• gear
• shaft

"STANAL 400" improves the wear resistance of stainless steel without compromising its corrosion resistance through a metal solid-phase diffusion treatment at 400°C. By precisely controlling the diffusion phenomenon within a thermal cycle capped at 400°C, a hard alloy layer that forms "STANAL 400" is generated. It allows for surface treatment without altering the characteristics of stainless steel or the mechanical properties of martensitic stainless steel. 【Features】 ■ Improved surface hardness ■ Enhanced wear resistance and galling resistance ■ Maintains the inherent oxidation resistance and corrosion resistance of stainless steel ■ Additional coating of solid lubricants is possible *For more details, please refer to the PDF document or feel free to contact us.

• stainless

"CERTESS NITRO" is a super-hard thin film coating for mechanical parts formed by physical vapor deposition. Thanks to its unique technology, the coating surface is extremely smooth, eliminating the need for any polishing process after film formation. Additionally, the coefficient of friction is significantly reduced, and resistance to corrosive wear, abrasive wear, and adhesive wear is greatly improved. It is utilized in a wide range of fields, including the aerospace industry, automotive parts, and medical device components. 【Features】 ■ Formed by PVD (Physical Vapor Deposition) ■ No polishing process required after film formation ■ Significant reduction in coefficient of friction ■ Improved resistance to corrosive wear, abrasive wear, and adhesive wear *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

• Processing Contract

The "PEL BH-R Bush" exhibits excellent wear resistance, seizure resistance, and corrosion resistance even in extreme sliding environments. Multi-layer surface coatings and appropriately placed dimples serve as grease reservoirs. This disperses and reduces concentrated loads applied locally, achieving optimal load distribution. By adopting this bush, the lubrication interval can be significantly extended. 【Features】 ■ Excellent wear resistance and seizure resistance ■ Excellent load-bearing capacity, corrosion resistance, abrasive wear resistance, and impact resistance ■ No frequent maintenance required ■ Significantly extended lubrication interval *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

• Plastic bearings

The "PEL BH3 Bush" is a machined bush that possesses excellent wear resistance and seizure resistance due to a combination of composite surface treatment and a shape designed to retain lubricating oil. It has very high resistance to wear and seizure, reducing the maintenance and upkeep costs of machines. It demonstrates high performance even under high surface pressure, corrosion, abrasive wear, impact, and poor maintenance. 【Features】 ■ Significant extension of lubrication intervals (up to 1000 hours) ■ Increased load capacity ■ Extended lifespan of joint parts ■ Very high resistance to wear and seizure ■ Reduction in machine maintenance and upkeep costs *For more details, please refer to the PDF document or feel free to contact us.

• Plastic bearings

The "H-Liner M" is a composite material bushing formed by weaving and molding a uniformly high-sliding resin throughout. It can be molded into various component shapes such as cylindrical shapes and sliding plates. It has been developed for use without lubrication. Press fitting and assembly using liquid nitrogen for cooling are optimal. 【Features】 ■ Maintenance-free ■ Capable of molding complex shapes ■ Low water absorption rate ■ Lightweight ■ Excellent core misalignment adaptability *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

• Plastic bearings

The "H-LINER S" is a composite material bush with a structure that adheres a friction liner to the inner peripheral surface of glass fiber reinforced resin. It far exceeds the mechanical properties of injection molded plastics and does not require lubrication work. It can accommodate various component shapes such as sliding plates and spherical bearings. 【Features】 ■ Maintenance-free ■ Self-lubricating ■ Capable of handling high loads ■ Lightweight ■ Noise reduction *For more details, please refer to the catalog. Feel free to contact us as well.

• Plastic bearings

The "H-Liner SHT" is a bushing that exhibits excellent sliding properties even under high temperatures (up to 285°C) and in a non-lubricated condition, thanks to the adoption of high-performance composite materials. 【Recommended Tolerances】 ■ Housing side: h7-h8 ■ Pin side: h7-h8 *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

• Plastic bearings

HEF DURFERRIT has been developing a series of bushes that can meet a wide range of customer needs for the past 20 years, based on expertise in surface treatment and deep knowledge of tribology. The bushes developed and manufactured by the HEF Group are characterized by special surface treatments and surface geometries (such as cross-hatching and cavities). We provide optimal proposals that match your needs, from reasonably priced products to high-performance items. 【Features of HEF Bushes】 - High wear resistance contributing to cost reduction - Long-lasting stable low wear characteristics, extended lifespan, long spans - High seizure resistance - Regular lineup that meets all needs For more details, please contact us or download the catalog.

• Other machine elements

"PROCEM" is a conductive multilayer metal film designed to impart electromagnetic shielding functionality to polymers and composite materials. As a PVD (Physical Vapor Deposition) coating, "PROCEM" not only offers the advantage of providing electromagnetic shielding but also simultaneously addresses issues such as dimensional and weight changes of the housing before and after coating, as well as the finish quality of masked areas. "PROCEM" meets the needs of the increasingly electronic automotive industry. 【Features】 ○ Contributes to weight reduction ○ Directly coats a complete metal thin film onto resin housings ○ Meets electromagnetic shielding specifications for automotive electrical equipment ○ Higher performance than conventional electromagnetic shielding paints ○ Mass production track record at European factories For more details, please contact us or download the catalog.

• Surface treatment contract service
• Processing Contract

HEF, which is well-versed in the sliding theory of mechanical components as a tribology research institute, provides comprehensive engineering services for DLC/PVD technology, including not only the customization of coating processes but also the selection of component materials and heat treatment, as well as pre- and post-coating treatments. 【Key Factors for Maximizing Performance】 ○ Selection of component materials ○ Finishing of coated surfaces ○ Condition of the coating surface For more details, please contact us or download the catalog.

• Surface treatment contract service
• Processing Contract

"Micro-texturing" is a technology that reduces friction by thickening the oil film present between sliding components and their counterparts through dimples (holes like those on a golf ball), thereby decreasing partial contact between sliding surfaces. Micro-texturing is a new and practical improvement in the field of surface engineering. 【Features】 - A groundbreaking technology utilizing lubricating piezo-adhesive properties - Thousands of holes per cm² - Capable of transitioning from boundary lubrication to fluid lubrication at lower sliding speed stages For more details, please contact us or download the catalog.

• Surface treatment contract service
• Processing Contract