Prusa Belt 2GT Y-axis – original drive belt for the Y-axis

Original 2GT timing (toothed) belt for the Y-axis designed for Original Prusa printers. This is the same part used in mass-produced printers, ensuring full compatibility and long life.

The belt ensures precise and smooth movement of the heated bed in the Y-axis, which is crucial for a high-quality first layer and overall printing accuracy. When the belt is worn, damaged at the teeth, or stretched, print quality may deteriorate (layer shifts, vibrations, inaccurate dimensions) – therefore, it is advisable to replace the belt in time.

Compatibility

The 2GT Y-axis belt is compatible with these Original Prusa printers:

• MK2, MK2S
• MK2.5, MK2.5S
• MK3, MK3S, MK3S+
• MK4, MK4S
• MK3.5, MK3.5S
• MK3.9, MK3.9S

It is not intended for MINI/MINI+, XL, SL1/SL1S, MMU units, and other special devices.

Main Features and Benefits

• Original Prusa part – identical parameters and quality as in new printers.
• 2GT Type – tooth profile optimized for precise engagement with minimal backlash.
• Length 650 mm – exactly matches the Y-axis construction of the listed models.
• Width 6 mm – compatible with original pulleys and tensioners.
• Tooth pitch 2 mm – ensures a precise step during bed movement.
• Durable material – long-term tension stability, low elongation.
• Quiet operation – smoother movement and less vibration during printing.

Technical Parameters

When is it time to replace the belt?

Consider replacing the belt if you observe:

• visible wear or damage to the teeth, cracks, or fraying,
• stretched belt that cannot be properly tensioned,
• repeated layer shifts or inaccurate print dimensions,
• unusually noisy or jerky movement of the bed in the Y-axis.

Belt replacement is a simple task that can significantly improve print reliability and quality.

Assembly and Adjustment

• Follow the official service/assembly manual for your specific printer model (available in the Prusa Knowledge Base).
• After installation, check:
  • correct belt routing through pulleys and tensioner,
  • belt tension according to the manufacturer's recommendations (neither too loose nor excessively tight),
  • belt alignment on pulleys without rubbing against edges.

A properly tensioned and routed belt is the key to quiet operation and precise printing.

Who is the product ideal for

• Owners of Original Prusa printers who:
  • perform preventative maintenance,
  • need a quick replacement for a damaged or lost belt,
  • want to have a spare part in stock to minimize downtime.

Investing in an original 2GT belt for the Y-axis pays off in stable print quality and a longer lifespan of the entire Y-axis mechanics.

Key Features:

• Original 2GT belt for the Y-axis of Original Prusa printers
• Full compatibility with the MK2/MK3/MK4 series (including S, +, 3.5, 3.9 variants)
• Precise and quiet operation thanks to the 2GT profile and 2 mm tooth pitch
• Correct length 650 mm and width 6 mm for installation without modifications
• Durable material with low elongation for long life
• Ideal as a replacement for a worn or damaged belt
• Simple replacement according to the official Prusa manual