Stairmaster Stepper Drive Hub Replacement

• Replacement drive hub is used on the Stairmaster steppers and includes:
• Hub with Needle Bearings and Grease Fitting
• Right Drive Sprocket with Clutch Bearing
• Left Drive Sprocket with Clutch Bearing
• Drive Shaft with Sprocket
• (4) Thrust Bearings
• (8) Thrust Washers
• Snap Ring

Maintenance

• It's recommended the hub assembly be lubricated every 3 months or 900 hours (whichever comes first) with heavy, multi-purpose grease

How It Works

• Pedal movement translated by the step chains rotating the clutch bearing drive sprockets keeps the hub assembly's output constant
• The output translated by the drive chain turns the transmission