Product Overview: The AHX 3120 Withdrawal Sleeve
The AHX 3120 is a precision-engineered withdrawal sleeve designed to facilitate the mounting and, more importantly, the dismounting of bearings with a tapered bore onto a cylindrical shaft. Specifically designed for a 90mm shaft diameter, this sleeve is an essential component in our comprehensive range of Bearing Accessories. As part of the AHX Series of Withdrawal Sleeves, it provides a secure and reliable method for locating bearings axially, ensuring they can be easily removed for maintenance or replacement without damaging the shaft or the bearing itself.
Withdrawal sleeves are used in applications where bearings are mounted on straight shafts. The sleeve is pressed into the bearing bore, which has a corresponding taper, creating a tight interference fit. This assembly is then pushed onto the shaft and secured against a shaft shoulder or other fixed component. The primary advantage of a withdrawal sleeve is the ease of bearing removal; by tightening a lock nut onto the sleeve's threaded section, the sleeve is pulled out from under the bearing, releasing the fit and allowing the bearing to be dismounted smoothly.
Key Features of the AHX 3120
- Simplified Bearing Dismounting: Specifically designed to allow for easy withdrawal of the bearing from its seating.
- Precision Taper: Machined to a precise taper (typically 1:12) to match the bore of compatible bearings, ensuring a firm and accurate fit.
- High-Strength Material: Constructed from high-quality steel to withstand the high pressures involved in mounting and dismounting operations.
- Slotted Design: Features a full-length slot that allows for slight compression to ensure a tight grip on the shaft.
- Threaded for Lock Nut: The sleeve is threaded to accommodate a lock nut, which is used to pull the sleeve out during dismounting.
- Cost-Effective Assembly: Eliminates the need for complex machining on the shaft, allowing the use of standard cylindrical shafts.
Common Applications
- Industrial Gearboxes: Used to mount bearings on transmission shafts, allowing for easier maintenance.
- Conveyor Belt Pulleys: Facilitates the secure mounting and simple replacement of large bearings in conveyor systems.
- Large Fans and Blowers: Ideal for air-handling units where bearings on long shafts require periodic servicing.
- Mining and Quarrying Equipment: Essential for machinery like crushers and screening machines, where components are subject to heavy loads and frequent maintenance.
- Pulp and Paper Mills: Used in roller assemblies and processing equipment where a robust and serviceable bearing arrangement is critical.
- Agricultural Machinery: Applied in heavy-duty equipment like combines and harvesters for mounting bearings on main shafts.
Benefits of Using the AHX 3120 Sleeve
- Prevents Shaft and Bearing Damage: The controlled withdrawal process prevents scoring or damage that can occur when dismounting press-fit bearings.
- Reduced Maintenance Time: Significantly speeds up the process of bearing replacement, minimizing machinery downtime.
- Secure and Reliable Fit: Provides a dependable interference fit that securely locks the bearing in its axial position during operation.
- Enhanced Operational Safety: The structured dismounting process is safer than using brute force methods.
- Versatility: Allows bearings with a tapered bore, such as certain Spherical Roller Bearings like the 22220, to be mounted on less expensive, straight cylindrical shafts.
- Simplified Shaft Requirements: Shafts do not require a built-in taper or multiple shoulders, simplifying manufacturing and reducing costs.
