RETAINING RING TYPE - B

🔩 B-Type Retaining Rings (Internal Circlips) | Neo Fasteners

B-Type Retaining Rings, commonly known as Internal Circlips, are circular metal fasteners designed to fit into a groove inside a bore or housing. They act as axial retainers for components like bearings, gears, or bushings and prevent them from moving outward.

At Neo Fasteners, we manufacture and supply high-quality Internal Circlips (B-Type) in Stainless Steel (SS), Mild Steel (MS), High Tensile (HT) Steel, Brass, and other alloys — adhering to international standards and available in custom sizes.

📌 1. Standard Internal Circlip (B-Type)

• Installed inside a machined groove in a bore or housing
  
  

• Designed to withstand axial loads
  
  

• Standard:
  
  

  • DIN 472
    
    

  • IS 3075 (Part 2)
    
    

  • ISO 8752 / JIS B 2804
    
    

• Common Sizes: From 8 mm to 300 mm internal bore diameter
  
  

• Materials:
  
  

  • SS 304 / SS 316
    
    

  • Carbon Spring Steel
    
    

  • Hardened MS
    
    

  • Phosphor Bronze / Brass (on request)
    
    

📌 2. Heavy-Duty Internal Circlip

• Thicker section for high-load applications
  
  

• Designed for gearboxes, engines, hydraulic systems
  
  

• Higher axial load-bearing capacity than standard circlips
  
  

📌 3. Lug-Type Internal Circlip (with Lugs or Lugs & Eyelets)

• Lugs with holes for use with circlip pliers
  
  

• May include tension lugs for additional grip
  
  

• Variants: With or without lug notches for automated assembly
  
  

📌 4. Laminar Internal Retaining Ring (Layered Type)

• Formed by stacking multiple thin rings to achieve thicker sections
  
  

• Used where variable thickness or custom preload is needed
  
  

• Ideal for aerospace, power transmission systems
  
  

📌 5. Constant Section Internal Retaining Ring

• Uniform thickness throughout the diameter
  
  

• Provides balanced and even load distribution
  
  

• Application: Precision instruments, bearings, and rotating assemblies
  
  

📌 6. Spiral Internal Retaining Ring

• Spiral-coiled with 360° surface contact
  
  

• No lug interference; ideal for high-speed rotating parts
  
  

• Used In: Bearings, gearboxes, motors
  
  

• Available in single-turn and multi-turn versions
  
  

📐 Standard Dimensions (DIN 472 Examples):

Groove Dia (d1)

Circlip Thickness (s)

Bore Size (d2)

10 mm

0.6 mm

9.5 mm

25 mm

1.2 mm

24.2 mm

50 mm

1.75 mm

48.8 mm

Up to 300 mm

...

...

Custom tolerances and sizes available.

🧰 Applications:

• Bearings inside housings
  
  

• Hydraulic cylinders and actuators
  
  

• Gearboxes and automotive engines
  
  

• Electrical motors and appliance assemblies
  
  

• Railways, defense, and aerospace components
  
  

🌟 Neo Fasteners Advantages:

• ISO 9001:2015 & IAF Certified
  
  

• RoHS Compliant – EU 2011/65/EU and EU 2015/863
  
  

• Finishes: Black Oxide, Zinc Plated, Phosphate, Passivated
  
  

• Supplied in bulk packs, kits, or custom labeled OEM sets