20mm Extra Narrow Set-Screw Ball Insert KFL004, 2-Bolt Flange Housing FL04-5, M8 Bolt Size, ZDC Alloy Case, Bearing-Steel Inner Ring, Extra-Narrow I.D., Mounted Unit for Linear Slide Systems and General Purpose

20mm Extra Narrow 2-Bolt Set-Screw Ball Insert
✔️ I.D. 20mm, extra-narrow inner ring, M8 bolts, set-screw lock

This is a single 20mm extra-narrow ball insert (KFL004) for 2-bolt flange mounting, used where compact shaft support is needed in light-duty assemblies and linear slide systems.

✅ Model KFL004, single unit each
✅ I.D. 20mm, extra-narrow inner ring
✅ Insert type: ball bearing, bearing-steel material
✅ Housing: ZDC alloy, FL04-5 2-bolt flange
✅ Bolt size M8 with set-screw locking
✅ Seal: contact seal type, no relubrication required
✅ Duty: light, temperature up to 212F (100C)
✅ HTS 8483.20.40.40, fits linear slide units and mounted applications

💡 What is a 2-bolt flange ball bearing insert used for in mounted linear systems? A 2-bolt flange ball insert gives a compact, easy-to-install bearing support for shafts in mounted assemblies and linear slide units. Short entry on typical use: - Provides quick flange mounting for shaft support and alignment in linear slide units and conveyors - Works as a sealed ball bearing or open insert with contact seal, ideal where bearing-steel inner rings are preferred - Common in light-duty machinery, jigs, conveyors, and DIY shafting where a set-screw locking insert is handy - Can be paired with ceramic or hybrid rollers when corrosion or high-speed needs emerge