Overview
The Falk 1035G20 sleeve coupling is a flanged, exposed-bolt sleeve assembly for the 1035G size Falk Lifelign gear coupling line. Manufactured by Rexnord Industries (successor to Falk Corporation), this coupling sleeve delivers reliable power transmission with 163,800 in-lbs torque capacity and operates safely to 3,900 RPM. The exposed bolt design and 1/8″ NPT lubrication ports enable straightforward maintenance and grease-gun access in demanding industrial applications.
Key Features
- Triple-Crowned Tooth Profile — Falk Lifelign teeth are crowned on root, tip, and face, reducing backlash and minimizing wear from misalignment.
- Steel Construction — 11.0″ outside diameter sleeve with steel hub material for durability in high-torque applications.
- Flanged Sleeve Design — Provides positive shaft positioning and accommodates limited end float (LEF) for equipment with sleeve bearings.
- 1/8″ NPT Lube Ports — Integrated lubrication holes for Falk LTG grease application, supporting up to 3 years maintenance intervals.
- Full Flex Articulation — Compensates for angular, radial, and axial misalignment in close-coupled installations.
- AGMA Bolt Pattern — Standard gear coupling geometry enables interchangeability with other compliant designs.
Technical Specifications
- Manufacturer Part Number: 1035G20 (Catalog 0774666)
- Series: Falk Lifelign G20
- Coupling Size Code: 1035
- Flex Type: Full Flex (Double Engagement)
- Bolt Type: Exposed
- Torque Capacity: 163,800 in-lbs
- Horsepower @ 100 RPM: 260 hp
- Maximum RPM: 3,900
- Sleeve Outside Diameter: 11.0 inches
- Coupling Overall Length: 8.63 inches
- Length Through Bore: 4.19 inches
- Bore Type: Rough Stock
- Sleeve Type: Flanged with Seal Rings
- Lubrication Fitting: 1/8″ NPT (Grease Ports)
- Weight: 152.72 lbs
- Maximum Angular Misalignment: 1.5°
- Operating Temperature Range: –20°F to 250°F (with Falk LTG grease)
- Material: Steel
- Condition: New in Box
Typical Applications
The Falk 1035G20 sleeve coupling is designed for close-coupled, horizontal industrial equipment requiring robust torque transmission with built-in misalignment tolerance. Common installations include:
- Fans and blower systems in process control
- Conveyor drives in material handling and steel mills
- Overhead crane hoist and transfer equipment
- Paper mill machinery and printing presses
- Electric motor-to-generator sets with limited end float requirements
- Pump and compressor drive trains in petrochemical facilities
Lubrication Recommendation: Falk Long Term Grease (LTG) is the factory-recommended lubricant. When properly applied, LTG-lubricated couplings do not require re-greasing for up to three years. For extended intervals, use NLGI #1 extreme pressure (EP) grease, AGMA #8EP specification, meeting ISO VG 680 viscosity.
Compatibility & Replacements
Compatible With
- Falk/Rexnord 1035G coupling line (double engagement, double-flex, and close-coupled styles)
- Any shaft and hub assembly rated for 1035 size gear coupling
- Standard industrial electric motors and gearboxes with matching bore diameters
- Horizontal fixed-center machinery in mills, plants, and processing facilities
- Equipment requiring limited end float (LEF) with sleeve bearings
Replaces / Drop-In Replacement For
- Original Falk 1035G20 exposed bolt sleeves in Lifelign coupling assemblies
- Other 1035G20/52 sleeve configurations with equivalent AGMA bolt patterns
- Worn or damaged sleeves in existing Falk 1035G coupling installations
- Note: Verify bore diameters and hub compatibility before replacement. Components may not fully intermix across different gear coupling brands.
Works With
- Falk Long Term Grease (LTG) and equivalent NLGI #1 EP (ISO VG 680) lubricants
- Standard grease guns and 1/8″ NPT lube fittings
- Mechanical alignment tools, feeler gauges, and depth micrometers for W-gap checking
- Industrial vibration monitoring and bearing temperature sensors
- Preventive maintenance schedules for bi-annual (or tri-annual with LTG) re-lubrication
