About WPA Worm Gearbox for Elevator & Lift

WPA WORM GEARBOX FOR LIFT SPECIFICATIONS

1. General Details

• Type: WPA Series Worm Gearbox
• Application: Lift / Elevator / Goods Lift / Hoist
• Mounting: Foot Mounted (B3)
• Orientation: Horizontal (Right-angle drive)
• Design: Compact, heavy-duty

2. Sizes Available

• WPA 60
• WPA 70
• WPA 80
• WPA 100
• WPA 120
• WPA 135
• WPA 155

3. Power Parameters

• Input Power: 0.5 HP to 10 HP
• Duty: Continuous Duty (S1)
• Service Factor: 1.5 to 2.5 (recommended for lifting )

4. Input Parameters

• Input Speed:
  • 750 RPM
  • 1000 RPM
  • 1440 RPM (standard)
• Drive Options:
  • Motor + coupling
  • Pulley drive (optional)

5. Gear Ratio (Important for Lift Safety )

• Standard Ratios:
  • 10:1
  • 20:1
  • 30:1
  • 40:1
  • 50:1
  • 60:1

Recommended for lift: 30:1 to 60:1

6. Output Parameters

• Output Speed: 15 RPM to 70 RPM
• Output Torque:
  • 200 Nm to 2000 Nm
  • (Depends on size & load)

7. Gear Materials

• Worm Shaft: Hardened alloy steel (case hardened)
• Worm Wheel: Phosphor bronze (high wear resistance )

8. Housing

• Material: Cast Iron (FG200 / FG260)
• Design:
  • Rigid & vibration resistant
  • Suitable for heavy load

9. Shaft Details

• Output Shaft:
  • Solid shaft with keyway
  • Suitable for drum / pulley mounting
• Input Shaft: Solid shaft

10. Lubrication

• Type: Oil bath lubrication
• Oil Grade: ISO VG 320 / 460
• Cooling: Natural cooling

11. Efficiency

• Efficiency Range: 65% to 85%
  (Lower efficiency but higher safety in lifting)