Reely Polyacetal Gear Rack Module 0.5 250 x 4 x 4.5 mm (ZH05250HF)

Precision motion and positioning in compact mechanisms often fail because standard gear racks lack the dimensional accuracy and low-friction properties needed for smooth operation. This polyacetal gear rack solves that problem with a module 0.5 tooth profile and a 250 mm length, giving you a reliable linear drive component for model building, robotics, and small automation projects.

Who is it for

Model builders, robotics enthusiasts, and engineers who need a lightweight, wear-resistant rack for precise linear movement. It suits applications where metal racks would add unnecessary weight or require lubrication.

Main features

• Made from polyacetal (POM), a self-lubricating engineering plastic with low friction and high wear resistance.
• Module 0.5, straight tooth profile, compatible with module 0.5 pinions.
• Dimensions: 250 mm length, 4 mm width, 4.5 mm height.
• Natural white colour, good chemical resistance, operating temperature range -40 to +100 °C.
• Approximately 159 teeth for smooth engagement.

Specifications

• Product type: Gear rack
• Material: Polyacetal (POM)
• Module: 0.5
• Length: 250 mm
• Width: 4 mm
• Height: 4.5 mm
• Tooth profile: Straight
• Number of teeth: 159 (approx.)
• Colour: Natural white
• Friction: Low
• Wear resistance: High
• Chemical resistance: Good against many solvents and chemicals
• Temperature range: -40 to +100 °C
• Density: 1.41 g/cm³
• Self-lubricating: Yes

Tips

Pair this rack with a matching module 0.5 pinion for optimal mesh. Secure it with adhesive or screws through custom mounting holes. For longer travel, multiple racks can be aligned end-to-end.