C-Shaped Split Flange Ring Set | Custom CNC Machined Parts

This C-shaped split flange ring set is a family of open-gap retaining and mounting rings manufactured for custom assembly applications. Each ring features a precision C-shaped opening that allows installation around a shaft or hub without full disassembly, along with a bolt-circle pattern of accurately positioned mounting holes. The set covers four graduated diameters — ? OD 40–120 mm?— so a single design can serve multiple housing sizes.

Parts are produced from ? SPCC / 45# carbon steel? with a black oxide finish for corrosion resistance and a low-reflection, industrial appearance. Hole positions are held to ?±0.05 mm?, ensuring consistent fit across all four sizes. As the manufacturer, Dongguan Nachuan supports full customization: hole count, gap width, thickness, and diameter can all be made to your drawing.

H2: Key Features - C-shaped opening enables tool-light installation and removal around shafts - Four graduated sizes machined from the same process for consistent fit - Even bolt-circle pattern with deburred, chamfered holes - Black oxide surface resists corrosion and hides fingerprints during handling - 100% size inspection before packing; PPAP/FAI reports available on request

H2: Applications Motor and gearbox mounting rings, sensor housings, appliance assemblies, automation fixtures, and any assembly requiring a split retaining flange.

H2: Specifications

FAQ 1. Can I order one size instead of the full set? Yes. Each diameter can be ordered separately; the four-size set is for customers standardizing on one mounting system. 2. Can the rings be zinc-plated instead of black oxide? Yes, we offer zinc plating, nickel plating, phosphating, and e-coating. 3. What drawing format do you accept? STEP, IGES, DXF, or PDF with 2D dimensions.