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Mechanical sleeve
mechanical sleeve
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mechanical sleeve
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mechanical sleeve
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mechanical sleeve
| Part Category | Part Name | Material Recommendation | Specifications and Models (National Standard / Example) | Core Dimension Parameters (Example, Unit: mm) | Key Performance Parameters | Applicable Scenarios | Remarks |
| Positioning and Fixing Type | Positioning Sleeve | - 45# Steel (Quenched and Tempered) - GCr15 (Bearing Steel, Wear Resistance Requirements) - 304 Stainless Steel (Corrosion Resistance Requirements) | GB/T 2867 (Positioning Sleeve Specification) Example: φ20 Positioning Sleeve, φ30 Positioning Sleeve | Inner diameter (d): 20 (H7), 30 (H7) Outer diameter (D): 32 (H8), 45 (H8) Total length (L): 40, 60 Positioning step diameter (d1): 25 (H9), 38 (H9) Step height (h): 8, 12 | Hardness: HB220-250 (45# quenched and tempered), HRC60-64 (GCr15 quenched) Coaxiality: <0.008mm (full length) Temperature resistance: <400℃ (45# steel), <600℃ (304) | Axial positioning of shaft systems and bearing positioning, such as machine tool spindle bearing positioning and motor rotor axial limit | Interference fit with the shaft (H7/r6), the step surface must be smooth (flatness ±0.01mm); GCr15 requires overall quenching and low-temperature tempering. |
| Shaft connections | Connecting sleeves | - 45# steel (quenched and tempered, medium load) - 20CrMnTi (carburized, heavy load) - 6061-T6 (aluminum alloy, light load) | GB/T 15757 (Shaft connecting sleeves) Examples: φ25 connecting sleeve, φ40 connecting sleeve | Inner Diameter (d): 25 (H7), 40 (H7) Outer Diameter (D): 38 (H8), 60 (H8) Overall Length (L): 80, 120 Thread Size (if threaded): M8×1 (locating holes at both ends) Wall Thickness (t): 6.5, 10 td> Tensile Strength: ±600MPa (45# steel), ±1100MPa (20CrMnTi carburized) Hardness: HB220-250 (45# steel), HRC58-62 (20CrMnTi carburized) Torque Capacity: ±300N·m (φ25, 45# steel) td> | Coaxial connection of two shafts, such as connecting conveyor drive shafts or connecting the output shaft of a reducer to the working shaft td> | The shaft and sleeve require a key connection (keyway tolerance JS9); the carburized layer depth of 20CrMnTi is 0.8-1.2mm; for light-load applications, choose aluminum alloy to reduce weight. | |
| Motion guide type | Guide sleeve | - GCr15 (high-precision guide) - 304 stainless steel (corrosion-resistant guide) - Tin bronze (ZCuSn10Pb1, self-lubricating) | GB/T 3043 (Guide Sleeve Specification) Example: φ15 guide sleeve, φ35 guide sleeve | Inner diameter (d, guide hole): 15 (H6), 35 (H6) Outer diameter (D): 25 (h7), 50 (h7) Guide length (L): 50, 80 Positioning flange diameter (D1): 35 (h9), 65 (h9) Flange thickness (h): 10, 15 | Guide accuracy: ≤0.01mm (radial runout) Surface roughness: Ra≤0.2μm (inner hole) Wear loss: ≤0.005mm/100h (oil lubrication, GCr15) Temperature resistance: ≤150℃ (tin bronze), ≤300℃ (304) | Guide for reciprocating parts, such as cylinder piston rod guide, hydraulic cylinder piston guide, and slide guide for automation equipment | Inner bore requires precision grinding; tin bronze material allows for oil-free lubrication (suitable for low-oil conditions); transition fit with mounting base (H7/H6) |
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