Custom Precision CNC Turned Flanged Locking Collar with Radial Set Screw for Shaft Locating

Engineered for precision positioning, axial load retention, and shaft locating, this flanged threaded collar is produced via high-precision CNC turning and mill-turn operations. Machined from solid bar stock—typically austenitic 304 or 316 stainless steel, or high-tensile 4140 alloy steel—this component combines an internal thread with an integrated radial set screw lock and a precision-ground shoulder face. It provides secure, anti-loosening mechanical clamping in high-vibration applications such as motion control assemblies, linear actuators, ball screw mounts, and industrial automation robotics.

• Dual-Action Retention System: Features precision internal threads for micro-adjustable axial positioning, paired with a perpendicular radial threaded port and socket set screw for anti-backlash locking without thread stripping.
• Tight Runout & Concentricity: Machined on multi-axis CNC turn-mill centers in a single setup, ensuring true perpendicularity between the mounting flange shoulder and the threaded bore axis down to 0.01 mm.
• Precision CNC Threading: Internal threads are cut using single-point CNC threading tools to guarantee thread profile accuracy (6H tolerance class), smooth engagement, and zero thread galling.
• Controlled Flange Face Flatness: The locating flange face serves as a precision mechanical stop or bearing retaining shoulder, finished to a low surface roughness to eliminate axial runout.
• Corrosion Resistance & Clean Surface Finish: Turned surfaces exhibit a smooth Ra 0.8–0.4 µm finish, fully passivated or electropolished for superior corrosion protection in washdown or harsh chemical environments.

1. Thread Pitch & Form Verification: 100% thread engagement inspection using calibrated plug gauges (Class 6H / 2B) and optical shadow graphs to confirm thread pitch and flank angle integrity.
2. Concentricity & Perpendicularity Checks: Dial test indicators (DTI) and CMM verification to confirm zero flange wobble during rotational service.
3. Set Screw Engagement & Torque Testing: Radial hole tapping inspected for depth and pitch consistency, tested against nominal torque to prevent cross-threading.
4. Degreasing & Ultrasonic Cleaning: Every batch undergoes ultrasonic degreasing to remove all machining oil and micro-burrs, followed by sealed rust-inhibitive packaging.