QH27D Ratchet Head, 27D, 3/4" Sq Drive

Tohnichi QH27D is a durable ratchet head engineered as an interchangeable accessory for torque wrenches, enabling precise bolting in confined spaces within demanding assembly environments such as automotive production, machinery maintenance, and general industrial applications. Providing a reliable 3/4" square drive (27D size) with a 36-tooth ratchet mechanism for smooth, one-way operation, this head ensures secure torque transmission without slippage, compatible with Tohnichi DB, DBN, and other series wrenches. Lightweight and compact with high-strength construction, it facilitates quick head swaps to adapt to various fastener sizes, promoting operator efficiency, reducing setup time, and maintaining accuracy in torque-sensitive workflows.

Key Performance Specifications

• Drive Size: 3/4" Square (19.05 mm insertion angle)
• Head Type: Ratchet square drive (27D)
• Ratchet Teeth: 36 teeth (10° engagement angle for fine control)
• Head Width: 36 mm
• Compatibility: Tohnichi DB, DBN, and interchangeable head torque wrenches
• Torque Capacity: Up to wrench rating (typically 200 - 2000 N·m depending on wrench model)

Physical and Environmental Specifications

• Weight: 1.0 lbs (0.45 kg)
• Dimensions: 8" L x 4.5" W x 3.5" H (203 mm x 114 mm x 89 mm)
• Material: High-strength alloy steel with hardened finish
• Operating Temperature: 14°F to 104°F (-10°C to 40°C); suitable for standard workshop conditions