Plumber wrench

A pipe wrench (also Sweden pliers) is a pair of pliers for working on pipes, as well as the fasteners used in the conduit installation ( sockets, union nuts etc. ). It is the classic tool for plumbing and heating and ventilation.

Standard pipe wrench

Pipe wrenches are different from water pump pliers in the operation. They are self-clamping by its lever mechanism. If one has the mouth width roughly adjusted with the knurled screw of the lower lever arm, one must not press the two gun arms / legs to grip the workpiece firmly. To rotate the workpiece, simply press on the ergonomically designed for top gun arm. This will indeed results in a power-saving operation, but to rotate in the other direction, the clamp must be implemented. The position of the gripper teeth is only designed to work in one direction.

The strong gripper teeth dig into the surface of traditional water pipes made of steel and their connection pieces (fittings ). They have a sufficient wall thickness to enable a powerful screw provided with the hemp or other sealing means thread.

Unusually tight or pipes of small wall thickness of the tubes there is a risk that the tube is pushed, or destroyed by the self-clamping effect of the clamp.

When using hardened steel there is a risk that the sharp teeth a pipe wrench blunt.

For the operation of nuts and bolts, which today mainly consist of hardened steel, is therefore more suitable tools with smooth ( adjustable wrenches, pliers fittings ), with smooth and parallel out ( pliers key ) or with hardened jaws ( Spanner ).

A distinction pipe wrenches on the orientation of the mouth:

• Jaw angle 90 ° ( " Swede " )

Advantage: even at wide open pliers, the jaws are not yet generating precision quality and are at the correct setting of its total length parallel to the edge surfaces of nuts.

• Jaw angle 45 ° ( " Eckrohrzange ", " oblique Swede ", etc.)

Disadvantage: at wide open pliers are the slanting jaws no longer opposite, whereby six or eight head glands are less used.

And ... on the shape of her cheeks:

• Straight ( Form A, for gripping objects having parallel surfaces, such as for example, nuts)
• A straight, a bulged (Form B, for gripping objects with parallel faces or round objects )
• S- shaped ( Form C, for gripping round objects )

The pliers are usually available in lengths from 250-700 mm and with spans from 35 mm.

A further modification is the pipe wrench with stepless speed adjustment. Here, the rim width is not varied over the thumbscrew, but. Simply by moving the forceps arm in the open state and by its engagement on a rack in a closed state

One-handed pipe wrench

Clearly differ structurally from the common pipe wrench can be one-handed pipe wrench. This is a self- tong, whose main branch of a small, spring-loaded second arm sits, which is similar to the ordinary pipe wrench with an adjusting screw to the desired opening width adjustable. The resilient mounting allows a ratchet-like work, because the jaws press firmly when tightening to the pipe and open automatically when lifting the handle ( one hand operation ). Function in a similar folding ratchet wrench for a particular hex size.

• Pliers