WEICON WEICONLOCK AN 301-48 is an anaerobic industrial adhesive that cures in an oxygen-free environment between metal surfaces and is designed for both locking cylindrical fits and sealing microscopic gaps. Thanks to its green color and medium-viscosity formulation, it spreads in a controlled manner on close-tolerance parts such as bearings, shafts, and bushings. Its high-strength class helps reduce the risk of loosening under vibration and impact while also helping to minimize fretting and corrosion caused by post-assembly clearance. The 50 ml packaging offers practical, metered use for maintenance/repair and production assembly.

WEICONLOCK AN 301-48 for cylindrical part locking and sealing
AN 301-48 is an industrial adhesive intended primarily to secure parts in cylindrical assemblies such as bearings, shafts, and bushings, while also providing a sealing effect along the joint line. The product works with an anaerobic resin system that reacts when contact with air is cut off between metal surfaces, creating a controlled and uniform bond within the assembly. Its medium-viscosity range provides a balanced behavior between flowability and gap-filling capability, keeping overflow risk at a manageable level during assembly. The manufacturer is WEICON GmbH & Co. KG (Germany).

Technical performance and resistance parameters
The viscosity of WEICONLOCK 301-48 at 25°C is approximately 450–650 mPa·s, and its maximum gap-bridging capacity is stated to be up to 0.15 mm. In terms of mechanical locking performance, breakaway torque is given at about 25–30 Nm, while prevailing torque is approximately 40–55 Nm. Shear strength is around 25–30 N/mm² according to DIN 54452, which is a key indicator for applications targeting high load capacity in cylindrical joints. Temperature resistance is specified from -60°C to +175°C, and with proper surface preparation, stable performance across a wide temperature range is intended.

Curing behavior and assembly time management
Because it cures as oxygen is excluded between metal surfaces, it is recommended to join the parts as soon as possible after application. Handling strength may develop in approximately 2–6 minutes, while full strength typically develops in about 2–4 hours, and these times should be considered in process planning. For slip fits, lightly rotating the parts during assembly can help the adhesive distribute more evenly along the joint line. Due to its high-strength class, disassembly can be challenging; if future removal is expected in maintenance scenarios, appropriate methods and equipment should be planned.

Critical points in surface preparation and application technique
For best results, removing oil, dirt, and processing residues is critical for bond strength and sealing continuity. The product should be applied as a thin, even film directly using the bottle tip/dosing nozzle, taking care not to let the nozzle contact metal surfaces. For press fits and larger diameters, applying a thin film to both surfaces supports gap closure and circumferential bond continuity. Adhesive that has contacted metal should not be poured back into the bottle, as metal particles can trigger unintended curing inside the container.

Industry-specific applications and compatible surfaces
AN 301-48 is commonly used in maintenance and repair for bearing seating, shaft-bushing retention, and locking cylindrical elements such as sleeves/liners. In automotive and heavy-vehicle maintenance, it can be advantageous for controlling bearing seat clearances and securing shaft-hub joints in industrial gearboxes and motor assemblies. It may be preferred in pumps, fans, and conveyor equipment to reduce vibration-related loosening and to provide sealing along the joint line. It is designed to work efficiently on metal-based surfaces (steel and similar alloys), and in serial production, use with dosing equipment supports repeatable quality and process control. The product is also mentioned together with approvals for drinking-water applications; where standards or certifications are required, the relevant compliance documents should be evaluated alongside process requirements.