Car crankshaft component AWTools AW18722BL — piston/crank part, 440 g

AWTools AW18722BL is a car crank / piston component weighing 440 g, designed as a replacement or spare part for vehicle engine assemblies where crank and piston linkage or related mechanical functions require repair or refurbishment. The component features three arms with jaws fitted with grit stones and a flexible shaft that enables self-centering and easier access in confined spaces. Jaws are manufactured from hardened steel to provide strength and resistance to wear, while a spring-and-knurled-nut system allows adjustment of the stones' pressure against the cylinder surface. The part is compatible with standard electric drills and fits into all three-jaw chucks, making it suitable for workshop and field maintenance tasks.

Advantages

The three-arm design with abrasive stones allows uniform surface treatment of cylinder bores and similar cavities without the need for complex fixtures. Hardened steel jaws deliver durability and long service life under repeated use. The flexible shaft provides self-centering action and improved maneuverability in tight or awkward engine compartments. Adjustable stone pressure via the spring and knurled nut ensures controlled material removal and helps avoid overworking the surface. Compatibility with common electric drills and three-jaw chucks simplifies deployment in most repair environments.

Suitable for

• Cleaning and degreasing car brake cylinders and clutches
• Surface treatment of motorcycle and small engine cylinders
• Refurbishing lawnmower and outboard engine cylinders
• Maintenance of hydraulic cylinders and industrial engine bores
• General workshop use where cylindrical surface dressing is required

Key specifications

• Weight: 440 g
• Three arms with jaws fitted with grit stones
• Jaws made from hardened steel for wear resistance
• Flexible shaft for self-centering and maneuverability
• Adjustable stone pressure via spring and knurled nut
• Compatible with standard electric drills
• Fits into all three-jaw chucks

How to use

Secure the component in a compatible three-jaw drill chuck and attach to a standard electric drill. Insert the abrasive jaws into the cylinder or bore to be cleaned or dressed, then start the drill at an appropriate low-to-medium speed. Use the flexible shaft to align the tool and allow the jaws to self-center. Adjust the pressure of the grit stones against the surface by turning the knurled nut to compress or release the spring as needed. Move the tool gently in and out of the bore to ensure even treatment; monitor progress frequently to avoid excessive material removal. After use, clean grit residues from the jaws and stones and store the component in a dry place.

Usage recommendations

Use appropriate personal protective equipment such as eye protection and gloves. Begin with light pressure and lower drill speeds, increasing only as needed for effective cleaning. Test on a sacrificial or inconspicuous area when working on critical surfaces. Avoid prolonged high-speed operation to prevent overheating of the abrasive stones and the treated surface.