20mm 4-bolt narrow plastic flange bearing single unit with set screw stainless insert black housing open cover and back seal for linear slide unit shaft support sealed ball bearing replacement ceramic-ready

20mm narrow 4-bolt plastic flange bearing, single unit
✔️ 20mm bore, set screw, stainless insert, open cover, back seal

This single 20mm 4-bolt plastic flange bearing with stainless insert and set screw is commonly used to support shafts on linear slide units, conveyor systems, and light machinery where a narrow profile and rear sealing are handy.

✅ Single unit, 20mm bore for 20mm shafts
✅ Black narrow plastic housing, 4-bolt flange mounting
✅ Stainless steel insert with set-screw locking
✅ Open cover design with rear back seal protection
✅ Ideal for linear slide unit support and shaft alignment
✅ Can replace sealed ball bearing setups; ceramic-ready option

💡 What is a 4-bolt plastic flange bearing used for in linear slide units and shaft support? It’s a handy bearing choice for mounting and protecting rotating shafts in compact machinery. - Provides stable shaft support and alignment for linear slide unit systems and conveyor shafts - Acts as a sealed ball bearing replacement in damp or washdown environments, with stainless insert and back seal protection - Supports upgrades to ceramic rolling elements for higher corrosion resistance or lower friction