RQH19DX17 Female Ratchet Head, 19D, 17mm

Tohnichi RQH19DX17 is a precision female ratchet head designed as an interchangeable accessory for torque wrenches, enabling smooth, one-way tightening of external hex nuts and bolts in restricted access areas across automotive assembly, electronics manufacturing, and precision engineering tasks. Featuring a compact 19D (19 mm diameter round end) for seamless integration and a 17 mm female ratchet mechanism for direct socket engagement, this head delivers reliable torque transfer without slippage, compatible with select Tohnichi CTA, CTB, CL, YCL, PCL, CSP, CF, CEM, and CDB series wrenches equipped with 19D interfaces. Ergonomically lightweight with robust construction, it supports rapid head exchanges to optimize workflow efficiency, minimize downtime, and ensure consistent torque application in space-constrained operations.

Key Performance Specifications

• Drive Size: 19 mm Round End (19D insertion angle)
• Head Type: Female ratchet (17 mm across flats)
• Ratchet Teeth: 36 teeth (10° engagement angle for fine control)
• Head Width: 25 mm (outside across flats)
• Compatibility: Tohnichi CTA200N, CTB200N, CL200N, YCL180N2, PCL180N, CSP200N, CF150N, CEM200N3, CDB200N-S, and other 19D-equipped interchangeable head torque wrenches
• Torque Capacity: Up to wrench rating (typically 50 - 200 N·m depending on wrench model)

Physical and Environmental Specifications

• Weight: 0.46 lbs (0.21 kg)
• Dimensions: 3.15" L x 0.98" W x 0.51" H (80 mm x 25 mm x 13 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
• Storage Conditions: Dry environment to prevent corrosion; indefinite shelf life

Key Features

• 36-Tooth Ratchet Mechanism: Fine 10° engagement enables smooth, controlled one-way rotation in tight spaces, reducing backlash and improving precision without slippage
• Female Socket Engagement: Secure 17 mm opening accommodates standard sockets for versatile hex fastener handling, ensuring positive drive connection and axis alignment
• Compact 19D Interface: Secure round-end design locks firmly into compatible wrench bases, allowing quick swaps for adaptable task requirements and reduced setup time
• Low-Profile Build: Slim 13 mm thickness and 25 mm width minimize obstruction in confined areas, ideal for assembly lines and maintenance in restricted machinery
• Durable Alloy Construction: Hardened steel withstands high-cycle use and minor impacts, promoting longevity and reliability in demanding industrial environments
• Versatile Compatibility: Effortlessly pairs with multiple Tohnichi wrench models for broad application coverage, from medium-torque mechanical to heavy-duty fastening