1" Shaft

• Category: Chain & Chain Hoists
  
• Fast shipping — same-day on orders before 4:30 PM EST

• J.R. Sectional Garage Door Chain Hoist – 1" Shaft | 4:1 Reduced Drive Manual Operator

  The J.R. Sectional Door Chain Hoist – 1" Shaft is a heavy-duty manual chain hoist designed for commercial and industrial sectional garage doors with a 1-inch solid keyed torsion shaft. Featuring a 4:1 gear reduction, it significantly reduces the force required to manually raise and lower properly balanced overhead doors, making it an ideal solution where electricity is unavailable or as a dependable manual backup system.

  Product Features

  • Fits 1" solid keyed torsion shafts
  • Heavy-duty 4:1 gear reduction for easier manual operation
  • Designed for counterbalanced sectional overhead doors
  • Durable steel construction for long service life
  • Smooth manual operation with reduced lifting effort
  • Mounts directly to the torsion shaft
  • Suitable for commercial and industrial garage door applications

  How It Works

  The chain hoist installs onto the torsion shaft of a properly balanced sectional garage door. Pulling the endless hand chain rotates the reduction gearbox, allowing the door to open or close with much less physical effort than direct operation.

  Compatibility

  Compatible with:

  • Commercial sectional garage doors
  • Industrial overhead doors
  • Counterbalanced door systems
  • 1" solid keyed torsion shafts
  • Standard-lift and most low-headroom applications

  Not intended for rolling steel doors unless specifically designed for that application.

  Package Contents

  • J.R. chain hoist assembly
  • #41 roller drive chain
  • Hand chain
  • Drive sprocket
  • Two shaft collars
  • Wall mounting L-bracket
  • Shaft key
  • Connecting hardware

  Contents may vary slightly by production batch.

  Installation Requirements

  • 1" keyed torsion shaft
  • Properly balanced garage door
  • Secure wall mounting location
  • Correct sprocket alignment
  • Professional installation recommended

  Installation and Safety

  Garage door torsion systems are under extreme spring tension and can cause serious injury if handled improperly.

  • Install only on properly balanced doors.
  • Never use the chain hoist to wind or adjust torsion springs.
  • Verify all shaft collars and set screws are securely tightened.
  • Inspect the chain and hardware periodically for wear.
  • Professional installation is strongly recommended.

  J.R. Sectional Garage Door Chain Hoist for 1" Shaft – Commercial Manual Reduced Drive Operator | 4:1 Gear Reduction | Heavy-Duty Jackshaft Chain Hoist

  Heavy-duty J.R. sectional garage door chain hoist for 1-inch keyed shafts. 4:1 reduced-drive manual operator for commercial and industrial counterbalanced overhead doors. Includes installation hardware for reliable manual operation.