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Cross roller
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Cross roller
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Cross roller
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| Part Category | Part Name | Material Recommendation | Specifications and Models (National Standard / Example) | Core Dimension Parameters (Example, Unit: mm) | Key Performance Parameters | Applicable Scenarios | Remarks |
| Rotary Support | Rollers for Crossed Roller Bearings | - Bearing Steel (GCr15/GCr15SiMn)- Stainless Steel (440C, for Corrosion Resistance)- High-Temperature Bearing Steel (GCr15SiMo, for High-Temperature Requirements) | GB/T 307.1 (Rolling Bearings Roller) Examples: φ5×10, φ8×15, φ12×20 | Diameter (d): 5 (g5), 8 (g5), 12 (g5) Length (L): 10 (h6), 15 (h6), 20 (h6) Chamfer (r): 0.3 (max), 0.5 (max), 0.8 (max) Cylindricity: ±0.002mm, ±0.003mm, ±0.004mm | Hardness: HRC 60-64 (GCr15), HRC 58-62 (440°C) Contact fatigue life: ±2000h (GCr15 at rated load) Surface roughness: Ra ±0.1µm (external cylindrical surface) Temperature resistance: ±150°C (GCr15), ±300°C (440°C) | High-precision rotating mechanisms, such as CNC machine tool turntables, robot spherical bearings, and radar antenna mounts | Requires use with a spacer cage to prevent roller collisions; raceway parallelism must be maintained within ±0.005mm during installation; GCr15 requires overall quenching and low-temperature tempering |
| Linear motion | Rollers for Crossed Roller Guides | - Bearing steel (GCr15SiMn, high wear resistance) - Stainless steel (440C, corrosion resistance) - Ceramic (Si₃N₄, lightweight) | GB/T 28570 (Crossed Roller Guides) Example: φ6×12, φ10×18, φ15×25 | Diameter (d): 6 (g6), 10 (g6), 15 (g6) Length (L): 12 (h7), 18 (h7), 25 (h7) End Parallelism: ±0.002mm, ±0.003mm, ±0.004mm Diameter Variation: ±0.0015mm, ±0.002mm, ±0.0025mm | Hardness: HRC60-64 (GCr15SiMn), HRC58-62 (440C) Linear Accuracy: ±0.003mm/m (Guide Error) Wear: ±0.001mm/100km (Oil Lubrication, GCr15SiMn) Impact Resistance: Capable of withstanding a 50N·m impact load (φ10 roller) | High-precision linear motion mechanisms, such as precision testing instrument worktables, semiconductor equipment guide rails, and laser cutting machine slides. | The rollers are arranged in a 90° cross pattern and must be used with the V-shaped rollers of the guideway pair. Ceramic rollers weigh only 1/3 of steel rollers and are suitable for high-speed reciprocating motion. 440C material must be avoided in strong acid environments. |
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