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DIN1800 (M1800) Crescent-Shaped Open Retaining Ring

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DIN 1800 (M1800) crescent-shaped open retaining ring is a specialized type of external retaining ring used in automotive and industrial applications. These retaining rings are designed to fit into grooves on the exterior of a shaft, providing axial retention for components such as bearings, gears, pulleys, or other rotating parts. The crescent shape distinguishes this design from standard circular retaining rings, offering unique advantages in specific applications.The crescent shape allows the retaining ring to have an open-ended design with a curved profile. This design provides flexibility during installation and ensures a secure fit in the groove while allowing for easier removal compared to fully circular rings.
Like other external retaining rings, the DIN 1800 is installed on the outside of a shaft and fits into a groove to prevent components from moving axially outward.
The crescent shape reduces the material required for the ring, making it lightweight and space-efficient while maintaining its functionality.
Common materials include carbon steel , stainless steel , and sometimes plastic (e.g., nylon) for corrosion resistance or lightweight applications.

Designed for Ease of Use:

We prioritize efficiency in your assembly processes. The distinct open crescent design of our DIN 1800 retaining rings acts as an intuitive guide for effortless installation and removal. Unlike closed circular rings that often require specialized spreading tools, the open ends allow for easier manipulation and positioning onto the shaft groove, often achievable by hand or with simple tools like screwdrivers or retaining ring pliers. This streamlined installation process significantly reduces assembly time and complexity.

Key Advantages for Your Applications:

  • Reliable Axial Retention: Securely prevents outward axial movement of components on the shaft.
  • Effortless Installation & Removal: The open crescent design allows for quick and simple handling, reducing assembly and maintenance time.
  • Space & Weight Efficient: The optimized shape minimizes material usage, resulting in a lightweight and compact solution.
  • Versatile Applications: Ideal for securing bearings, gears, pulleys, and other rotating parts in automotive and industrial machinery.
  • Durable Construction: Manufactured from high-quality materials like carbon steel and stainless steel for long-lasting performance and resilience.
  • Cost-Effective Solution: Offers an efficient and reliable retention method without the need for complex tooling or additional hardware.
  • Available in a Range of Sizes and Materials: [Mention specific material options like carbon steel (with various finishes), stainless steel (grades 304, 316), and available size ranges (e.g., shaft diameters from X mm to Y mm) to cater to diverse application needs].

Ideal for:

  • Automotive transmissions and powertrains
  • Industrial gearboxes and machinery
  • Electric motors and generators
  • Pump and compressor assemblies
  • Material handling equipment
  • Robotics and automation systems
  • Any application requiring secure external axial retention on shafts

Product Name Standard Material Diameter Thickness/Width
External Retaining Ring DIN 471 Spring Steel, Zinc Plated 5 mm 1.0 mm
External Retaining Ring DIN 471 Spring Steel, Zinc Plated 8 mm 1.2 mm
External Retaining Ring DIN 471 Spring Steel, Zinc Plated 10 mm 1.5 mm
Internal Retaining Ring DIN 472 Spring Steel, Zinc Plated 12 mm 1.5 mm
Internal Retaining Ring DIN 472 Spring Steel, Zinc Plated 15 mm 2.0 mm
Internal Retaining Ring DIN 472 Spring Steel, Zinc Plated 20 mm 2.5 mm
External Retaining Ring GB/T 893.1-1986 65Mn Steel, Galvanized 6 mm 1.0 mm
External Retaining Ring GB/T 893.1-1986 65Mn Steel, Galvanized 10 mm 1.2 mm
Internal Retaining Ring GB/T 894.1-1986 65Mn Steel, Galvanized 12 mm 1.5 mm
Internal Retaining Ring GB/T 894.1-1986 65Mn Steel, Galvanized 16 mm 2.0 mm
External Retaining Ring ANSI B27.2 Carbon Steel, Zinc Plated 0.25" (6.35mm) 0.04" (1.0mm)
External Retaining Ring ANSI B27.2 Carbon Steel, Zinc Plated 0.5" (12.7mm) 0.06" (1.5mm)
Internal Retaining Ring ANSI B27.2 Carbon Steel, Zinc Plated 0.75" (19mm) 0.08" (2.0mm)
Internal Retaining Ring ANSI B27.2 Carbon Steel, Zinc Plated 1.0" (25.4mm) 0.1" (2.5mm)
External Retaining Ring ASME B18.21.1 Stainless Steel 302 0.375" (9.5mm) 0.05" (1.27mm)
External Retaining Ring ASME B18.21.1 Stainless Steel 302 0.75" (19mm) 0.08" (2.0mm)
Internal Retaining Ring ASME B18.21.1 Stainless Steel 316 1.5" (38.1mm) 0.12" (3.0mm)
Internal Retaining Ring ASME B18.21.1 Stainless Steel 316 2.0" (50.8mm) 0.15" (3.8mm)
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About Us
Zhejiang Zhongrui Auto Parts Co., Ltd.
Zhejiang Zhongrui Auto Parts Co., Ltd.
As China Automotive DIN1800 (M1800) Crescent-Shaped Open Retaining Ring Suppliers and Custom DIN1800 (M1800) Crescent-Shaped Open Retaining Ring Factory.
Zhejiang Zhongrui Auto Parts Co., Ltd. was founded in 1986. The original unit is located in Ruian City, one of the birthplaces of Wenzhou's economic model, and is located in Tangxia, the "Auto Parts Capital of China". In 2004, in order to further expand its production scale, the company The industrial park in Jiaxing City, Zhejiang, which is located in a very advantageous location, acquired new land and built a modern production plant and office building. The company covers an area of ​​36,237 square meters, with a factory area of ​​20,000 square meters. The company's fixed assets are 130 million yuan.
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