FSQ

An FSQ withdrawal sleeve is used to mount a bearing with a tapered bore onto a cylindrical shaft. The sleeve fits between the shaft and the bearing, and its tapered outer surface matches the bearing bore. When a lock nut is tightened on the sleeve's threaded section, it pushes the bearing up the taper, creating an interference fit that secures the bearing in place. The sleeve also allows for dismounting: when the lock nut is loosened and a withdrawal nut is used, the bearing can be pushed off the taper. This makes FSQ withdrawal sleeves suitable for applications where bearings need periodic replacement or adjustment, such as in conveyors, pumps, and gearboxes.

FSQ withdrawal sleeves are made from chrome steel. This material is chosen for its hardness, wear resistance, and ability to maintain dimensional stability under load. Chrome steel is a common material for bearing components and power transmission parts, as it can withstand the stresses of industrial applications. The sleeves are typically machined to precise tolerances to ensure proper fit with the bearing bore and shaft. While chrome steel offers good performance in many environments, it is not immune to corrosion, so appropriate lubrication and sealing should be considered in harsh conditions. For specific material certifications or alternative materials, contact 3G Electric with the application requirements.

To select the correct FSQ withdrawal sleeve, you need the bearing's bore diameter, the shaft diameter, and the bearing's taper ratio (commonly 1:12). The sleeve's bore diameter must match the shaft diameter, and its outer taper must match the bearing bore. The thread size on the sleeve must match the lock nut used to secure the bearing. FSQ withdrawal sleeves are identified by industry numbers such as AHX312, AH322, or AH2334, which correspond to specific size combinations. You can cross-reference the bearing number or the original sleeve number. 3G Electric's catalog lists bore diameter, overall width, thread size, and taper for each SKU. If you need help, provide the bearing part number and shaft dimensions, and 3G Electric can identify the matching FSQ sleeve.

Both FSQ withdrawal sleeves and adapter sleeves are used to mount tapered-bore bearings on cylindrical shafts, but they differ in how they are dismounted. An adapter sleeve is typically used with a lock nut and a lock washer; the bearing is pushed onto the taper by tightening the nut. Dismounting requires a withdrawal nut or other tools to push the bearing off. A withdrawal sleeve has a threaded section that allows a withdrawal nut to pull the bearing off the taper more easily, often without damaging the bearing or shaft. FSQ withdrawal sleeves are identified by model prefixes such as AH, AHX, and AOH. The choice depends on the application and maintenance requirements. For frequent dismounting, withdrawal sleeves can simplify the process.

The FSQ withdrawal sleeve range includes bore diameters from 55 mm to 340 mm, based on the models supplied by 3G Electric. Examples include the AHX312 with 55 mm bore, AH322 with 100 mm bore, AHX3126 with 125 mm bore, AH2334 with 160 mm bore, AH2340 with 190 mm bore, AH2348 with 220 mm bore, and AOH3072 with 340 mm bore. Thread sizes vary accordingly, from M65x2 to Tr380x5. Some models are available with inch bore dimensions, such as the AHX2322 with a 3 15/16 inch bore. The range covers many common shaft sizes used in industrial machinery. For a complete list of available sizes, refer to the product catalog or contact 3G Electric with your requirements.

FSQ withdrawal sleeves are made from chrome steel, which has standard temperature limits typical of bearing steels. The permissible operating temperature depends on factors such as the bearing, lubrication, and fit. In general, chrome steel components can operate at temperatures up to approximately 120°C to 150°C, but this can vary. For high-temperature applications, consider factors like thermal expansion, which can affect the interference fit, and the lubricant's temperature range. If the application exceeds standard limits, alternative materials or special designs may be needed. Consult the application requirements with 3G Electric to determine if an FSQ withdrawal sleeve is suitable or if a different solution is required.