Bushing for screw compressor BRS 25x30x20

The BRS wear sleeve 25×30×20 is designed for rotary shafts in screw compressor modules as the mating surface for PTFE rotary shaft seals. Mounted directly onto the shaft, it provides an optimal hard and smooth sealing surface that significantly outlasts standard steel shafts.

The sleeve is manufactured from GCr15 or GCr15SiMn bearing steel with quenching treatment. The working surface is plunge-ground to a roughness of Ra 0.2 µm — the value required for correct operation of a PTFE sealing lip. Surface hardness of HRC 60–65 ensures excellent resistance to abrasive wear even at high peripheral speeds.

• Type: BRS — Rotary Shaft Wear Sleeve
• Inner diameter D1: 25 mm
• Outer diameter D2: 30 mm
• Height H: 20 mm
• Material: GCr15 / GCr15SiMn bearing steel (quench hardened)
• Surface hardness: HRC 60–65
• Surface roughness: Ra 0.2 µm
• Operating temperature range: -60°C to +300°C
• Max. surface speed: 40 m/s
• Max. operating pressure: 6.0 MPa
• Typical applications: screw compressors, pumps, PTFE shaft seal systems
• OEM code: 48000348
• SKU: 21778

Installation is thermal — immerse the sleeve in hot lubricating oil (80–100°C) for 10 minutes, quickly slide onto the shaft, and allow to cool completely before fitting the shaft seal.