マスオカ東京 List of Products and Services

The "Slipper Seal" is a product designed to prevent damage to O-rings caused by reciprocating or rotating motion by being attached to the seal sliding part. Thanks to the low friction characteristics of PTFE, rubber elasticity, and seal pressure, friction and wear are significantly reduced. It can be used with the dimensions of JIS standard O-ring grooves. Additionally, we offer sealing materials such as "Lip Seal Packing," which is effective against corrosive liquids, and "Helical Gasket," which excels in solvent and chemical resistance, suitable for piping joints in chemical plants. 【Features】 ■ Almost no change in starting resistance even after long periods of inactivity ■ No stick-slip during operation ■ Usable at high pressure without a backup ring (up to 20 MPa) ■ Usable without lubrication *For more details, please refer to the PDF materials or feel free to contact us.

• Sealing

"MPF Packing" is a packing and gasket designed for foreign matter contamination measures that respond to metal detectors. It comes in a wide variety of colors, allowing for visual detection as well. It is suitable as a component in food manufacturing processes and food manufacturing machinery. 【Features】 ■ Responds to metal detectors ■ Made in Japan ■ Complies with food hygiene tests (excluding some) ■ Custom orders available *Samples are available upon request. If you would like a sample, please apply through the [Contact Us] section. *You can view the product documentation in the [Download] section.

• Other machine elements
• Sealing

The "O-Ring Wolf Series" is a revolutionary fluororubber that can withstand high temperatures and various solvents, chemicals, and hydraulic oils that conventional fluororubber could not, while also possessing mechanical strength, sealing performance, and heat resistance that are equal to or greater than those of conventional fluororubber. We offer a lineup that includes the cost-effective "ULF-7000" and the highly chemical-resistant, solvent-resistant, and oil-resistant "ULF-8000." Our company responds to customer needs with reliable technology and quality. 【Product Lineup】 ■ULF-7000 ■ULF-7100 ■ULF-7300 ■ULF-7500 ■ULF-8000 ■ULF-8100 *Samples are available. If you would like a sample, please apply through the "Contact Us" section. *For more details, please refer to the PDF materials or feel free to contact us.

• Rubber

【Properties Value List (Excerpt)】 <Pure PTFE> 　Specific Gravity: 2.17 　Tensile Strength: 30.9 MPa 　Elongation: 400% <PTFE with Fillers> ○15% Glass Fiber 　Specific Gravity: 2.23 　Tensile Strength: 23 MPa 　Elongation: 320% ○15% Graphite 　Specific Gravity: 2.17 　Tensile Strength: 15.7 MPa 　Elongation: 230% ○60% Bronze 　Specific Gravity: 3.91 　Tensile Strength: 18.1 MPa 　Elongation: 215% *Samples are available upon request. If you would like a sample, please apply through [Contact Us]. *Product documentation can be viewed from [Download].

• Rubber

Ecoparflow is a revolutionary product made from ultra-high-performance fluororubber, which retains rubber elasticity while being able to be used with all types of chemicals, including organic polar solvents (such as ketones, esters, ethers, furan, ammonia), acids, and alkalis, which were previously unusable with conventional fluororubbers. Ecoparflow offers two types of raw materials as follows: *We also handle custom products suitable for harsh operating environments, such as those in semiconductor manufacturing equipment, so please consult us in such cases. 【Types of Raw Rubber】 ■PB-70 Appearance: Black Specific Gravity: 1.93-1.97 Hardness: 71-81 ■PW-70 Appearance: White Specific Gravity: 2.09-2.15 Hardness: 65-75 *Samples are available upon request. If you would like a sample, please apply through the [Contact Us] section. *You can view product documentation in the [Download] section.

• Rubber

The "MPF Packing" is a packing made of rubber material that responds to metal detectors. Compared to products made of stainless steel or fluororesin that have been used for foreign matter contamination measures, it is easy to handle and has holding power that is comparable to conventional rubber. We offer four types of materials to suit various applications. Additionally, we have "MPF Fluororesin (PTFE) Hurl Packing" and "MPF O-Rings" in our lineup. 【Features】 ■ Responds to metal detectors ■ Easy to handle ■ Made in Japan ■ Complies with food hygiene tests (except for some) ■ Custom orders available *Samples are available upon request. If you would like a sample, please apply through the "Contact Us" section. *You can view the product documentation in the "Download" section.

• Other machine elements

This document is a dimension chart for "Heller Gaskets" and "L-shaped Packing for IDF Union Fittings" provided by Masuoka Tokyo, which offers high-quality industrial machine parts. 【Contents】 ■ Heller Gaskets - Sanitary piping - Gas pipe standards ■ L-shaped Packing for IDF Union Fittings *Samples are available upon request. If you would like a sample, please apply through the [Contact Us] section. *Product documentation can be viewed via [Download].

• Other machine elements

The "Herlur Gasket" is a sealing material used in piping joints at food and pharmaceutical factories. The material complies with the Ministry of Health, Labour and Welfare's Food Sanitation Act No. 595, and we can also provide special materials tailored to specific cleaning solutions. Please feel free to consult us. 【Features】 ■ Compliant with IDF and ISO2852 ■ Compliant with the Ministry of Health, Labour and Welfare's Food Sanitation Act No. 595 ■ Supports special materials *Samples are available. If you would like a sample, please apply through the "Contact Us" section. *You can view product documentation in the "Download" section.

• Other machine elements

The KS-X ring is composed of a lip seal with an X-shaped cross-section and can be used and handled almost like an O-ring. The KS-X ring has superior characteristics compared to conventional O-rings. 【Features】 ■ No possibility of twisting ■ Low friction and long lifespan ■ Excellent sealing performance ■ No sealing defects due to molding ■ Abundant materials ■ Wide range of sizes *Samples are available. If you would like a sample, please apply through the [Contact Us] section. *You can view the product documentation in the [Download] section.

• Other machine elements

Our tapping balls are made in Japan using materials with excellent rebound elasticity. Silicone rubber, urethane rubber, fluororubber, and white EPDM all comply with the Food Sanitation Act in every formulation. 【Product Lineup】 ■ Silicone Rubber ■ Natural Rubber (NR) ■ Urethane Rubber ■ Chloroprene Rubber (CR) *Samples are available upon request. If you would like a sample, please apply through the [Contact Us] section. *You can view the product documentation from the [Download] section.

• Other machine elements

A brief explanation of the excellent properties of fluoropolymer coatings and types of processing paints. 【Properties】 ■ Non-stick ■ Water and oil repellency ■ Heat resistance ■ Low friction ■ Chemical resistance ■ Electrical properties *Samples are available upon request. If you would like a sample, please apply through the [Contact Us] section. *You can view the product documentation from the [Download] section.

• Other machine elements

The GT jacket O-ring is an O-ring that is completely coated with fluororesin using fluororubber or silicone rubber, combining the elasticity of rubber with the chemical resistance of fluororesin. It is available in standard sizes such as JIS and AS568A, as well as special dimensions ranging from an inner diameter of 6.1mm to 3,568mm. 【Features】 ■ High chemical resistance ■ Wide range of dimensions ■ Wide operating temperature range ■ Smooth and seamless joints ■ Tough and excellent electrical insulation *Samples are available upon request. If you would like a sample, please apply through the [Contact Us] section. *Product documentation can be viewed from the [Download] section.

• Other machine elements

The "MRS series" is a silicone coating that allows for easy release from uncured molded products. By combining it with one of the three properties: solvent resistance, high hardness, and high heat resistance, we can prevent production troubles caused by stickiness. 【Features】 ■ Solvent resistance ■ High hardness ■ High heat resistance ■ Non-sticky *Samples are available upon request. If you would like a sample, please apply through the [Contact Us] section. *You can view the product documentation from the [Download] section.

• Other machine elements

We introduce the relationship between the crushing of O-rings and crushing force using graphs on our company website's "O-Ring Guide." [List of graphs introduced on the website] ■ Hardness (Shore A) 50 ■ Hardness (Shore A) 60 ■ Hardness (Shore A) 70 ■ Hardness (Shore A) 80 ■ Hardness (Shore A) 90 *Samples are available upon request. If you would like a sample, please apply through the [Contact Us] section. *You can view the product documentation from [Download].

• Other machine elements

The hardness of O-rings comes in type A durometer hardness Hs70 and Hs90, with Hs90 being specified for general high-pressure use. However, Hs70 can also be used for the same high-pressure applications with the use of backup rings. At high pressure, there can be protrusion from the gap in the shaft. This protrusion is determined by the hardness of the O-ring, the gap between components, and the pressure. Even in low-pressure situations where protrusion is not an issue, it helps prevent accidents such as fraying and twisting damage, which account for the majority of O-ring failures, thus extending the lifespan of the O-ring. 【Product Naming (Example)】 The naming of backup rings consists of the standard number or standard name, type symbol, and the O-ring call number. ■ Spiral JISB2401-4 (Standard Number), T1 (Type Symbol), P20 (Ring Call Number) ■ Bias Cut JISB2401-4 (Standard Number), T2 (Type Symbol), P20 (Ring Call Number) ■ Bias Cut JISB2401-4 (Standard Number), T3 (Type Symbol), P20 (Ring Call Number) *Samples are available upon request. If you would like a sample, please apply through the [Contact Us] section.

• Other machine elements

Name: We will introduce examples in the order of phenomenon, cause, and countermeasure. ■ Swelling: The rubber becomes soft, and the O-ring increases in size overall. The fluid used penetrates the rubber material → Change to a suitable rubber material. ■ Extraction: The rubber becomes hard, and the O-ring decreases in size overall. The plasticizer contained in the rubber material is extracted by the fluid used → Change to a suitable rubber material. ■ Permanent deformation: The O-ring is crushed and does not return to its original shape. The operating temperature is too high / The crush depth is too large → Change to a rubber material with good heat resistance / Review the groove dimensions or O-ring dimensions. ■ Overhang: The O-ring is torn either completely around or partially. It overhangs the gap between the groove and the mating surface and tears at the edge of the groove → Reduce the gap with the groove / Use a high-hardness O-ring or combine with a backup ring, etc. * Samples are available upon request. If you would like a sample, please apply through [Contact Us]. * Product documentation can be viewed from [Download].

• Other machine elements

Please install it to avoid twisting, and apply sufficient grease or sealing liquid to the groove. As a general rule, do not reuse. Additionally, if you need to clean it with a cleaning solution after installation, please confirm compatibility with the materials before proceeding. Some materials may produce harmful gases when burned, so do not dispose of them by incineration. 【Storage Precautions】 ■ Store in a place away from direct sunlight and with low humidity. ■ Do not open until just before use. ■ Store in a place that does not become high in temperature and has little air circulation. ■ Store in a way that does not put pressure on the O-ring. ■ Do not hang, as local deformation may occur. ■ Store in a place with little dust and take care to avoid oil adhesion. *Samples are available upon request. If you would like a sample, please apply through the [Contact Us] section. *You can view the product handling materials from the [Download] section.

• Other machine elements

■Tsubushi Shiro When using O-rings for motion, Tsubushi Shiro significantly affects sealing effectiveness, dynamic resistance, and compression set, so it must be kept to a minimum. In cases of high speed or poor lubrication conditions, please make Tsubushi Shiro even smaller than standard motion O-rings. ■Gap At high pressure, gaps between the piston and cylinder, as well as between the rod and sleeve, can cause extrusion, leading to damage. This gap should be designed to be as small as possible. The use of backup rings is effective in preventing extrusion. ■Use of Backup Rings When pressure is applied from both sides, install backup rings on both sides of the O-ring. When pressure is applied from one direction, install one backup ring on the side opposite the pressure. If there is enough space, it is recommended to use two backup rings even for unidirectional pressure. *Samples are available upon request. If you would like a sample, please apply through the [Contact Us] section. *Product documentation can be viewed from the [Download] section.

• Other machine elements

The resistances in the table are primarily characteristics due to the polymer and may vary depending on the formulation. Please confirm through actual machine tests before use. 【Types of Rubber and Their Characteristics】 ■ Natural Rubber: Has elasticity and good mechanical properties such as abrasion resistance. ■ Synthetic Natural Rubber: Almost the same properties as natural rubber. ■ Styrene Rubber: Good abrasion resistance and aging resistance, and is inexpensive. ■ Butadiene Rubber: Has good elasticity and excellent abrasion resistance. ■ Chloroprene Rubber: Has average properties such as weather resistance, ozone resistance, heat resistance, and chemical resistance. ■ Butyl Rubber: Has good weather resistance, ozone resistance, and gas permeability, and is resistant to polar solvents. *Samples are available upon request. If you would like a sample, please apply through [Contact Us]. *Product documentation can be viewed from [Download].

• Other machine elements

The necessary rubber properties for O-rings are excellent elasticity, good compression set resistance, high abrasion resistance, superior heat resistance, and a long lifespan without being affected by the applicable liquids or gases. They need to be selected according to each application. 【Features】 ■ Excellent elasticity and heat resistance ■ Good compression set resistance ■ High abrasion resistance and long lifespan *Samples are available. If you would like a sample, please apply through the [Contact Us] section. *You can view the product documentation from [Download].

• Other machine elements

O-rings are compressed when installed in a groove because the depth of the groove is smaller than the thickness of the O-ring. This amount of compression is called "crush white." At low pressure, the sealing action is performed by the rubber elasticity of the O-ring. When hydraulic pressure is applied from one side, a reaction force greater than the applied hydraulic pressure occurs. This is referred to as the O-ring's self-sealing action. 【Features】 ■ Small volume at the installation part ■ Simple structure, easy to install and remove ■ A wide variety of materials available, usable over a broad temperature range ■ Can effectively seal under alternating pressure from both sides ■ More economical compared to other packings ■ Abundant stock for quick delivery *Samples are available upon request. If you would like a sample, please apply through the [Contact Us] section. *Product documentation can be viewed from the [Download] section.

• Other machine elements

The "R.Echo-Oring Product Catalog" is the product catalog of Masuoka Tokyo Co., Ltd., which mainly deals with O-rings and industrial machine parts. With a wide variety of materials available, you can also find the seals you are looking for. 【Contents】 ■ Features and sealing principles of R.Echo-Oring ■ How to use O-rings ■ Handling and storage precautions for O-rings ■ Materials for R.Echo-Oring ■ Properties and applications of general rubber ■ Standard values and property values of materials for R.Echo-Oring ■ O-ring dimension table ■ Ultra-high-performance fluororubber Echo Bar Flow ■ Vacuum sealing products *For details, please request the materials or view the PDF data from the download.

• Other machine elements