Wrench for Striking JCB 70 mm — JCB JCB-79170

Flat striking wrench JCB model JCB-79170 with a 70 mm jaw width, designed for use with a hammer or mallet to apply impact force when tightening or loosening fasteners. This wrench is intended for professional and workshop environments where controlled striking on the wrench body is required. The flat striking face transfers percussive energy to the tool while keeping the jaw alignment suitable for large nuts and bolts encountered in heavy-duty assembly, maintenance and repair tasks.

Advantages

The flat striking wrench provides a solid striking surface that resists deformation under repeated impact and helps direct force into the fastener. Its 70 mm jaw width accommodates larger hexagonal and square fittings common in construction and industrial equipment. The design allows use with hammer or mallet to deliver measured impact torque without the need for specialized impact sockets, making it practical for field service and workshop use.

Suitable for

• Heavy-duty assembly and disassembly of machinery
• Maintenance and repair of construction and agricultural equipment
• Workshop service tasks requiring controlled striking on a wrench
• Field repairs where impact tools are needed but impact sockets are unavailable

Key specifications

• Jaw width: 70 mm
• Type: flat striking wrench compatible with hammer or mallet use
• Intended application: heavy-duty fastening and loosening with percussive force
• Material: forged steel construction suitable for repeated impact (manufacturer specification)
• Finish: durable protective surface treatment (manufacturer specification)

How to use

Place the wrench jaws securely on the fastener so the contact faces align with the sides of the nut or bolt. Hold the handle at a safe distance and strike the flat striking face with a hammer or mallet to transmit percussive force through the wrench to the fastener. Apply controlled, measured blows rather than excessive force to avoid damaging the fastener or wrench. When loosening, begin with lighter strikes and increase impact as needed; when tightening, monitor torque where precision is required and avoid overtightening by using calibrated tools for final torque verification.

Usage recommendations

Use appropriate personal protective equipment such as safety glasses and gloves, and ensure the workpiece is secured before applying percussive force. Inspect the wrench for visible wear, cracks or deformation before use and replace it if any damage is found. For tasks requiring precise torque values, complete final tightening with a torque wrench after initial percussive application.