The Timken Company 99212 Redi-Sleeve Shaft Repair Sleeve

Description:

The Timken National Redi-Sleeve 99212 is a precision-engineered stainless steel shaft repair sleeve designed to restore worn, grooved, or damaged shaft sealing surfaces without requiring shaft replacement or machining. Installed directly over the existing shaft, it creates a smooth, wear-resistant sealing surface that extends the service life of standard radial shaft oil seals while reducing maintenance costs and equipment downtime. The 99212 Redi-Sleeve is widely used in industrial gearboxes, pumps, compressors, electric motors, conveyors, agricultural machinery, and heavy-duty rotating equipment. Maintenance teams, OEMs, and system integrators rely on this shaft repair sleeve for equipment repairs, retrofit projects, seal restoration, and preventive maintenance.

Applications:

The Timken National Redi-Sleeve 99212 is designed to repair worn shaft seal contact surfaces and restore dependable sealing performance while allowing continued use of the original shaft and standard oil seal size. Its precision thin-wall stainless steel construction provides a hardened, corrosion-resistant running surface with minimal effect on shaft dimensions, making it ideal for industrial gearboxes, pumps, compressors, electric motors, wheel-end assemblies, conveyors, agricultural equipment, and other rotating machinery where shaft wear has caused lubricant leakage or premature seal failure.

Technical Specifications:

• Manufacturer Part Number (MPN): 99212
• Manufacturer: Timken National
• Product Type: Shaft Repair Sleeve (Redi-Sleeve®)
• Product Series: Redi-Sleeve® 99000 Series
• Material: Stainless Steel
• Design Units: Inch (Imperial)
• Shaft Size Range: 2.124–2.130 in (53.95–54.10 mm)
• Nominal Shaft Diameter: 2.127 in (54.03 mm)
• Flanged Outside Diameter: 2.422 in (61.52 mm)
• Width on Shaft (Seal Running Surface): 0.781 in (19.84 mm)
• Overall Width: 0.938 in (23.83 mm)
• Installation Depth: 1.375 in (34.93 mm)
• Construction: Precision Thin-Wall Stainless Steel Sleeve with Installation Flange
• Surface Finish: Precision Ground, 10–20 μin Ra (0.25–0.50 μm Ra), Lead-Free
• Function: Restores worn shaft sealing surfaces without shaft replacement or machining
• Compatible Components: Standard radial shaft oil seals for approximately 2.126 in shaft diameters
• Typical Applications: Pumps, gearboxes, compressors, electric motors, conveyors, agricultural equipment, wheel hubs, and industrial power transmission systems.

Common Replacements:

• SKF Speedi-Sleeve 99212
• National Redi-Sleeve 99212 Equivalent
• CR Shaft Repair Sleeve for 2.126 in Shaft Diameter