Internal retaining ring VK series

C type flat wire elastic single-turn retaining ring for bores (DIN 472)

Description:
Single-turn internal wire retaining rings are produced by coiling flat wire to form a circlip without ears and without scrap. They provide a continuous 360° retaining surface and are suitable for internal bores where short axial displacement and low to medium elastic working conditions are required. Materials commonly available: carbon steel, stainless steel, copper and other alloys.

Processing steps

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

Primary competitive advantage

• Economical production due to coiling process (no scrap)
• Continuous 360° retaining surface (no gap)
• Wide material options (carbon steel, stainless, copper, alloys)
• Easy installation and removal
• Competitive factory-direct pricing and short lead times
• Available sample pieces depending on stock

Specification (selection of part numbers and dimensions)
Part No | Use | OD (mm) | Radial wall (mm) | Thickness (mm) | Turns | Housing dia (mm) | Groove dia (mm) | Groove width (mm)
VKM-6 | Internal | 6.35 | 0.51 | 0.3 | Single Turn | 6 | 6.3 | 0.38
VK-25 | Internal | 6.71 | 0.51 | 0.3 | Single Turn | 6.35 | 6.65 | 0.38
VKM-7 | Internal | 7.38 | 0.51 | 0.3 | Single Turn | 7 | 7.32 | 0.38
VKM-31 | Internal | 8.36 | 0.64 | 0.38 | Single Turn | 7.92 | 8.28 | 0.46
VKM-8 | Internal | 8.44 | 0.64 | 0.38 | Single Turn | 8 | 8.36 | 0.46
VKM-9 | Internal | 9.54 | 0.76 | 0.38 | Single Turn | 9 | 9.46 | 0.46
VKM-37 | Internal | 10.11 | 0.76 | 0.38 | Single Turn | 9.53 | 10.03 | 0.46
VKM-10 | Internal | 10.58 | 0.76 | 0.38 | Single Turn | 10 | 10.5 | 0.46
VKM-11 | Internal | 11.68 | 0.89 | 0.38 | Single Turn | 11 | 11.6 | 0.46
VKM-43 | Internal | 11.84 | 0.76 | 0.38 | Single Turn | 11.1 | 11.76 | 0.46
VKM-12 | Internal | 12.74 | 0.89 | 0.38 | Single Turn | 12 | 12.66 | 0.46
VKM-50 | Internal | 13.49 | 1.14 | 0.46 | Single Turn | 12.7 | 13.41 | 0.56
VKM-13 | Internal | 13.8 | 1.14 | 0.46 | Single Turn | 13 | 13.72 | 0.56
VKM-14 | Internal | 14.8 | 1.14 | 0.46 | Single Turn | 14 | 14.72 | 0.56
VKM-56 | Internal | 15.06 | 1.14 | 0.46 | Single Turn | 14.27 | 14.99 | 0.56
VKM-15 | Internal | 15.8 | 1.14 | 0.46 | Single Turn | 15 | 15.72 | 0.56
VKM-62 | Internal | 16.66 | 1.14 | 0.46 | Single Turn | 15.88 | 16.59 | 0.56
VKM-16 | Internal | 16.8 | 1.14 | 0.46 | Single Turn | 16 | 16.72 | 0.56
VKM-17 | Internal | 17.82 | 1.14 | 0.46 | Single Turn | 17 | 17.72 | 0.56
VKM-68 | Internal | 18.26 | 1.14 | 0.46 | Single Turn | 17.45 | 18.16 | 0.56
VKM-18 | Internal | 18.82 | 1.14 | 0.46 | Single Turn | 18 | 18.72 | 0.56
VKM-19 | Internal | 19.86 | 1.14 | 0.46 | Single Turn | 19 | 19.76 | 0.56
VKM-75 | Internal | 19.89 | 1.14 | 0.46 | Single Turn | 19.05 | 19.79 | 0.56
VKM-20 | Internal | 21.26 | 1.65 | 0.53 | Single Turn | 20 | 21.06 | 0.66
VKM-81 | Internal | 21.89 | 1.65 | 0.53 | Single Turn | 20.62 | 21.69 | 0.66

Technical features / specifications

• No gap — 360° retaining surface.
• Manufacturing: coiled from flat wire (no scrap).
• Materials: carbon steel, stainless steel, copper and other alloys.
• Suitable for short axial displacement and low to medium elastic working conditions.
• Dual working principle: cylindrical spring + disc spring.
• Easy installation and removal.
• Standard references and dimensions listed above; custom sizes on request.