Spiral retaining ring DNK-250

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Description
Internal stainless steel snap rings have no ears in your assembly. They are manufactured by coiling the ring from flat wire; this process produces a retaining ring with no protruding ears or burrs to interfere with your assembly. Because coiling produces a retaining ring with no scrap, the spiral retaining ring can be economically produced in carbon steel, stainless steel, copper and many other alloys. No gap – 360° retaining surface. No protruding ears interfere with mating components (uniform cross-section). Economically produced in stainless steel because the coiling process produces no scrap. No charge on custom designs. Easy installation and removal.

Features of Lisheng internal stainless steel snap ring

• The earless design prevents interference between the retaining ring and mating components.
• Wound and formed manufacture gives more stable mechanical properties compared with traditional stamping.
• 360° plane and dimensional stability.
• More than 5,000 standard retaining rings available (diameter range: 6.5–406 mm).
• No mold opening required for special customized non-standard retaining rings (diameter range: 5–2300 mm).
• Easy to install and disassemble.

Usage / Installation
The internal spiral retaining ring is installed in a pre-machined inner groove of a round hole and is used to locate and retain components axially. The outer diameter of the internal snap ring is slightly larger than the assembly hole diameter; installation and removal use the ring's elasticity. Circlip-type pliers are typically used to install or remove the ring by engaging the pliers into the ring and compressing it into the groove. Common materials used include 65Mn, SUS304 and SUS316.

Processing Steps

• Design
• Drawing
• Flatten the wire
• CNC Machining
• Heat treatment
• Surface treatment
• Finishing
• Quality inspection
• Packing

Finish

• Oil dip
• Passivation
• Blacking
• Zinc / nickel / chrome / silver / gold plating
• Powder coated

Specification (excerpt)
Part Number | Use | Outside Diameter (mm) | Radial Wall (mm) | Thickness (mm) | Turns | Housing Diameter (mm) | Groove Diameter (mm) | Groove Width (mm)
DNK-250 | Internal | 257.89 | 9.53 | 4.86 | 2-Turn | 250 | 256 | 5.15
EK-250 | Internal | 258.1 | 9.48 | 2.18 | 2-Turn | 250 | 256.16 | 2.4
WKT-975 | Internal | 260.6 | 9.53 | 4.8 | 3-Turn | 247.65 | 258.8 | 5.31
WKM-975 | Internal | 260.6 | 12.7 | 4.75 | 2-Turn | 247.65 | 258.8 | 5.31
WK-1000 | Internal | 262.13 | 9.53 | 2.18 | 2-Turn | 254 | 260.15 | 2.39
WKM-1000 | Internal | 267.28 | 12.7 | 4.75 | 2-Turn | 254 | 265.43 | 5.31
WKT-1000 | Internal | 268.02 | 9.53 | 4.8 | 3-Turn | 254 | 265.43 | 5.31
EK-260 | Internal | 268.43 | 9.48 | 2.18 | 2-Turn | 260 | 266.4 | 2.4
WK-1025 | Internal | 268.78 | 9.53 | 2.18 | 2-Turn | 260.35 | 266.75 | 2.39
DNK-260 | Internal | 269.93 | 11.14 | 4.86 | 2-Turn | 260 | 268 | 5.15
WKM-1025 | Internal | 273.96 | 12.7 | 4.75 | 2-Turn | 260.35 | 272.06 | 5.31
WK-1050 | Internal | 275.18 | 9.53 | 2.18 | 2-Turn | 266.7 | 273.1 | 2.39

Caractéristiques / spécifications techniques

• SKU: 1121b95349b0
• Category: Internal Spiral Retaining Rings
• Typical materials: 65Mn, SUS304, SUS316 (also available in carbon steel, copper alloys and others)
• Design: Coiled (earless), flattened wire spiral retaining ring
• Retention surface: 360° (no gap)
• Available turns: 2-Turn and 3-Turn variants shown in specifications
• Standard diameter range referenced on page: examples from ~257.89 mm up to ~275.18 mm in the provided table; custom diameters available within stated manufacturing capability (5–2300 mm)
• Surface finishes: oil dip, passivation, blacking, various platings, powder coat
• Manufacturing / processing: flattened wire, CNC forming, heat treatment, finishing and quality inspection