Hook Wrenches

A hook wrench is a special-jaw wrench that turns round nuts with notches cut around their circumference by engaging the lug at the end of its arc-shaped body in the notch. It is used for tightening and loosening notched nuts that secure bearings to shafts, adjusting nuts on machine shafts and similar notched rings that have no hex faces. In this category, İzeltaş square-end hook wrenches are sold in sizes such as 30/32, 34/36, 40/42, 45/50, 52/55, 58/62 and 68/75, per piece; the two numbers in the size give the nut outer diameter range the wrench fits in millimeters, and the manufacturer states the DIN 1810 standard for this product. Choose the wrench according to the nut's outer diameter and the shape and width of the notch; the lug must seat fully in the notch and the wrench's arc must rest against the circumference of the nut. A square-end hook wrench does not replace a pin-type hook wrench, which is made for nuts that have round holes instead of notches around the circumference.

Products

How to choose Hook Wrenches

A hook wrench is a special-jaw wrench that turns round nuts with notches cut around their circumference by engaging the lug at the end of its arc-shaped body in the notch. It is used for tightening and loosening notched nuts that secure bearings to shafts, adjusting nuts on machine shafts and similar notched rings that have no hex faces.

  • Identify the measurement or fastening task and the required insulation safety rating.
  • Select jaw profile, cross-section range and accessories for the conductor or fastener standard.
  • Check CAT voltage category and replacement tip or die availability for field conditions.

Frequently asked questions

What is Hook Wrenches and where is it used?

A hook wrench is a special-jaw wrench that turns round nuts with notches cut around their circumference by engaging the lug at the end of its arc-shaped body in the notch. It is used for tightening and loosening notched nuts that secure bearings to shafts, adjusting nuts on machine shafts and similar notched rings that have no hex faces.

What should I compare when choosing Hook Wrenches?

Choose the wrench according to the nut's outer diameter and the shape and width of the notch; the lug must seat fully in the notch and the wrench's arc must rest against the circumference of the nut.

Where can I find technical details for Hook Wrenches products?

A square-end hook wrench does not replace a pin-type hook wrench, which is made for nuts that have round holes instead of notches around the circumference.

Special Wrenches Selection Guide: Technical Criteria and Engineering Practice