Valve Lapping Drill Attachment with 4 Rubber Adapters

The drill attachment simplifies the lapping of engine valves. It transfers the drill’s rotary movement to the valve while automatically alternating the direction of rotation.

The tool is intended for use with fine valve grinding paste and a suitable rubber adapter matched to the valve-head diameter.

Automatic Direction Reversal

The integrated mechanism automatically changes the direction of rotation during operation. This creates the alternating movement required for controlled and uniform valve lapping.

Drill Compatibility

• Drive shaft diameter: 8 mm
• Suitable for mounting in a compatible drill chuck
• Minimum operating speed: 1,000 rpm
• Maximum operating speed: 1,250 rpm

Operate the drill only within the specified speed range.

Rubber Adapters

The included adapters provide contact with different valve-head diameters:

• 20 mm
• 30 mm
• 35 mm
• 45 mm

The rubber adapters are mounted onto the 13 mm adapter shaft.

Technical Specifications

• Tool type: Valve lapping drill attachment
• Direction of rotation: Automatic alternating reversal
• Drive shaft: 8 mm
• Rubber-adapter mounting shaft: 13 mm
• Operating speed: 1,000–1,250 rpm
• Suitable compound: Fine valve grinding paste

Scope of Delivery

• 1 valve lapping drill attachment
• 1 rubber adapter, 20 mm
• 1 rubber adapter, 30 mm
• 1 rubber adapter, 35 mm
• 1 rubber adapter, 45 mm