120-tooth timing belt

MXL Toothed Belt Transmission: Mechanical Precision for Your Slot Project

The 120-tooth PSP-BD120MXL toothed belt from Sloting Plus is designed for belt-drive transmission systems in slot cars. With a standard MXL pitch and a thickness of 1.8 mm, it offers an exact coupling with the corresponding pulleys, ensuring efficient transmission with no slippage.

Technical Features

• Number of teeth: 120
• Pitch: MXL (metric extra light standard)
• Thickness: 1.8 mm

Function and Performance

Belt-drive transmission systems are an alternative to direct pinion-crown gear setups. By eliminating metal-to-metal contact in the transmission, they reduce mechanical friction and noise, which can result in smoother response and less heat generation during prolonged running.

The MXL pitch is one of the most widely used formats in precision small-scale transmissions, making it easier to find compatible pulleys and plan the most suitable transmission ratio for each setup.

Compatibility and Installation

This belt is compatible with any MXL pitch pulley. For proper operation, it is essential that the mounting tension is correct: too much slack causes tooth skipping; too much tension increases friction and may reduce the belt's lifespan. It is recommended to check the alignment between pulleys before finalising the installation.

Sloting Plus manufactures spare parts and preparation and tuning tools for the slot hobby, so this belt fits into chassis preparation and customisation projects where belt drive is explored as an alternative to the classic pinion-crown gear train.

Common Mistakes

• Installing the belt with excessive tension, leading to losses due to friction and premature wear.
• Using pulleys with a different pitch than MXL, which causes poor meshing and skipping.
• Not checking the parallelism between the pulley shafts before adjusting the tension.

Frequently Asked Questions

What does MXL pitch mean in a toothed belt?

MXL (Metric Extra Light) is a widely used tooth profile standard in precision small-scale transmissions. It defines the shape and pitch of the tooth, so it is essential that both the belt and the pulleys share the same pitch for proper meshing.

How many teeth do I need for my setup?

The number of teeth determines the total length of the belt. With 120 teeth at MXL pitch, you obtain a belt of a specific length; if your wheelbase does not match that value, you will need a belt with more or fewer teeth. Check your chassis specifications before choosing.

How do I know if the mounting tension is correct?

The belt should have a slight deflection when pressed with a finger in the free span: neither completely rigid nor with visible slack. Incorrect tension in either direction negatively affects performance and durability.

Is this belt compatible with Sloting Plus pulleys?

As long as the pulleys are of MXL pitch, yes. Check the pitch of your pulleys before placing the order to ensure compatibility.

The Sloting Plus PSP-BD120MXL is a 120-tooth MXL pitch toothed belt, 1.8 mm thick, designed for belt-drive transmission systems in slot car builds. Compatible with any standard MXL pulley, it delivers smooth and precise power transfer with minimal friction. An essential component for hobbyists exploring belt-drive setups as an alternative to traditional pinion-and-crown gear trains.