Overview
The Falk 1203221 is a 1035G flex hub component manufactured by Rexnord for use in Falk Lifelign G Series gear couplings. This rough stock bore (RSB) hub accommodates standard shaft sizes and integrates with Falk’s triple-crowned tooth design system for flexible mechanical drive transmission.
Key Features
- 1035G Size Rating: Optimized for medium-duty industrial coupling applications
- Rough Stock Bore: Standard rough bore finish allows custom machining to fit your specific shaft diameter
- Triple-Crowned Teeth: Crowned on root, tip, and face for free articulation and reduced wear from misalignment
- AGMA 20° Full Depth Tooth Design: Minimizes tip loading, reduces backlash and radial clearance
- Flexible Coupling Compatibility: Direct replacement hub for Lifelign series assemblies
Technical Specifications
- Outside Diameter (OD): 7.000 inches
- Hub Length: 4.19 inches
- Bore Style: Rough Stock Bore (RSB) — straight bore, requires machining
- Series: Falk Lifelign G Series
- Coupling Size: 1035G
- Tooth Type: Triple-crowned AGMA 20° full depth
- Material: Steel
- Lubrication: Compatible with Falk LTG Grease
- Warranty: 3-year warranty on Falk Lifelign couplings when used with genuine Falk components and proper lubrication
Typical Applications
The Falk 1203221 flex hub is used in industrial machinery requiring flexible shaft coupling, including:
- Pump-to-motor drive trains
- Compressor and blower couplings
- Conveyor system drive systems
- Fan and HVAC equipment
- General industrial power transmission with moderate misalignment tolerance
Compatibility & Replacements
Compatible With
- Falk Lifelign G Series gear couplings (1010GV through 1070GV sizes)
- Falk sleeve EXP G20 and SHR G10 flex elements
- Standard shaft coupling mounting systems
- Industrial motor and driven equipment with shaft alignment tolerance
Replaces / Drop-In Replacement For
- Falk 1203221 original equipment hub assemblies in Lifelign couplings
- Direct replacement for same-size coupling refurbishment and repair
Works With
- Falk Lifelign flex elements (sleeves and seal kits)
- Falk LTG Grease lubrication system
- Falk GMax 6000 polyalkylene glycol lubricant (ISO VG 135, -30° to +125°F range)
- Standard industrial motor shafts and equipment bores with machining to RSB specifications
