Description
Basic Dimensions & Geometry
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Module (m): 0.5 (tooth pitch of 0.5 mm)
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Rack Length: 125 mm total
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Tooth Height (H): 7 mm from root to tip
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Rack Thickness / Face Width (b): 4 mm
🔩 Mounting Features
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Pre-drilled Holes: Typically includes alternating small (~2.05 mm) and larger (~2.55 mm) through-holes for easy fastening Hole Pitch & Layout: Evenly spaced to allow mounting on custom frames or supports
🛠️ Material & Construction
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Material: Commonly moulded from low-noise, low-wear plastics like nylon, acetal (Delrin), or standard thermoplastics
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Weight: Lightweight (a 250 mm rack weighs ~6.8 g; the 125 mm version approx. 3–4 g)
🧰 Typical Applications
Suited for:
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DIY CNC or robotic linear drives
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Miniature rack-and-pinion systems
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RC models, 3D printers, and educational projects
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Low-load automation and prototyping
📊 Summary Table
| Parameter | Value |
|---|---|
| Module | 0.5 |
| Length | 125 mm |
| Tooth Height (H) | 7 mm |
| Rack Width (b) | 4 mm |
| Mount Holes | Ø2.05 mm & Ø2.55 mm, spaced along rack |
| Material | Nylon / Acetal plastic |
| Estimated Weight | ~3–4 g |
✅ Buying Tips & Compatibility
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Choose the 0.5 module if matching with brass or plastic pinions of the same module for smooth meshing.
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Check hole size/spacing to align with your mounting screws or standoffs.
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Ensure rack width (4 mm) matches the width of your gear or is slightly less for clearance.
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