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Flat wrenches

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Pipe wrenches with S 2.0 "button
Special offer

Pipe wrenches with S 2.0 "button

Starting at
€107.50 +VAT
  • For metal: 65
  • LED: *****2
  • Solvent - based paints and varnishes: 68
  • Temperature range: 90
  • Hair / brush height mm: 06
  • Mark: 09
  • Accuracy +/- mm: 0
  • Number of puller arms: 40
Supplier:
HA
Hammerjack OÜ
verified supplier
Response time: usually up to 1 day
Pipe wrenches with S 1.5 "button
Special offer

Pipe wrenches with S 1.5 "button

Starting at
€67.92 +VAT
  • For metal: 65
  • LED: *****2
  • Solvent - based paints and varnishes: 68
  • Temperature range: 90
  • Hair / brush height mm: 06
  • Mark: 09
  • Accuracy +/- mm: 0
  • Number of puller arms: 40
Supplier:
HA
Hammerjack OÜ
verified supplier
Response time: usually up to 1 day
Pipe wrenches with S 1 "button
Special offer

Pipe wrenches with S 1 "button

Starting at
€47.00 +VAT
  • For metal: 65
  • LED: *****2
  • Solvent - based paints and varnishes: 68
  • Temperature range: 90
  • Hair / brush height mm: 06
  • Mark: 09
  • Accuracy +/- mm: 0
  • Number of puller arms: 40
Supplier:
HA
Hammerjack OÜ
verified supplier
Response time: usually up to 1 day
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Wrenches

Open-end wrenches are a large group of assembly hand tools available in many different designs and sizes. Despite this large variety of designs, open-end wrenches are used for only two operations: tightening or loosening of bolted connections with a wide range of dimensions and strengths. At the same time, the bolt connections operated with open-end wrenches have hexagonal or single or double hexagonal drives.

Wrench design

Each open-end wrench consists of a working part, which directly acts on the nut or bolt head during the screwdriving/unscrewing operation, and a gripping part, called the handle, which is used for holding with the hand, turning and exerting force with the hand. During assembly/disassembly operations, the torque applied to the grip of the wrench is transmitted through its working part to the bolt. The working parts of the wrenches are either in the form of appropriately shaped jaws or eyes. They are angled accordingly to the axis of the wrench. In the case of open-end wrenches, for example, the head axis is set at an angle of 15° to the longitudinal axis of the tool, so that the wrench can be turned in small spaces. In order to make it easier to handle threaded joints with different spatial configurations, the design of open-end wrenches has been modified. This has led to the development of double-ended wrenches (e.g. combination wrenches), offset wrenches, ratchet ring wrenches, hinged wrenches, etc. Open-end wrenches are mostly made of chrome vanadium steel (CrV) by forging, heat treatment and machining. Their manufacturing standards are set by ISO 691, ISO 7738, ISO 3318, ISO 1711-1 and DIN 3113. One of the variants of these tools are wrenches made of hard steel sheet. They have the advantage of low manufacturing costs and a low thickness of approx. 2 mm, and the disadvantages of low hardness and a low service life, as well as the impossibility of applying high torques. Since there are two measurement systems in the world (metric and imperial), open-end wrenches are dimensioned according to these systems. In the metric system, the jaw opening range of the wrenches is 3.5-50 mm, and in the inch system, it is 1/4" to 3" (inch). (inch). At the same time, double-ended wrenches are produced in lengths from 100 to 450 mm. Each professional wrench manufacturer optimises the shape of the head, the handle and the ring profile individually. The purpose of this is to make it easier to insert the wrench into the nut or bolt and to screw in places which are difficult to access, to reduce stress on the nut or bolt and to reduce operator fatigue.

Types of open-end wrenches

Open-end wrenches are available in many different designs. On the basis of the shape of the working part, we classify open-end wrenches as combination wrenches, ring wrenches and combination wrenches. On the other hand, in terms of the number of working parts, we can distinguish between single-sided wrenches (e.g. impact or adjustable) and double-sided wrenches (e.g. combination wrenches). Another important criterion for the division of wrenches is the location of the working part. According to this, we distinguish between standard wrenches and wrenches with an offset jaw or eyelet. A separate type of wrench is the ring spanner, which has one or two ratchets. They can be 2 or 4-size and either fixed or offset (movable). Another type of wrench is the hand-held impact wrench, i.e. a wrench that can be beaten with a hammer. Open-end wrenches can also be divided according to the shape of their handles and distinguished by straight wrenches, curved wrenches, wrenches with an "S" shape, etc. The group of open-end wrenches also includes socket wrenches (pipe wrenches, straight and offset), hook wrenches, double shank wrenches (for nuts with 2 holes), and universal wrenches (which aggregate the functionalities of several types or sizes of wrenches).

Main characteristics of open-end wrenches

The technical parameters that characterise open-end wrenches are: size (jaw width or ring diameter, mm or inches) overall length (mm), working head thickness (mm), working head height and overall weight (g).

Applications for open-end wrenches

Open-end wrenches are used wherever threaded connections are used. Since their occurrence in technicized civilization is almost universal, it is difficult to list here all the industries that use these tools. Most often they are used in industry, mainly in factories producing vehicles and machines and in maintenance departments of all production plants, construction and crafts, service and mechanical workshops, including in cars. They are manufactured by e.g. Bahco, Beta, Facom, Gedore, Hazet, Proxxon, Snap-on, Stanley, Stahlwille, Wera etc.