Slotted screwdriver: Marking and dimensions of the slotted screwdriver

Screwdriver - an indispensable tool in the repair or construction. You can find it in any economy. Modern industry offers a variety of models of the device. They can have different shapes and sizes. But the most popular are flat and spline options.

Inexperienced master may get entangled in the presented models. Therefore, it is important to know about the features slotted screwdriver and about the purposes for which it is used.

What is slotted screwdriver

Slotted screwdriver - small tools for fixing or removal of hardware with thread. These include a variety of screws, bolts or screws.

the tool tip has a special shape in the form of small projections. They are necessary for reliable fixation screwdriver in a hat.

The tip may have a different configuration, which allows you to choose the most appropriate tool.

Marking and dimensions of the slotted screwdriver

Brand tools have special markings printed on the end of the handle or on its flat side. In qualitative tools labeling conforms to generally accepted standards of the International Classification of hand carpentry tools.

If a screwdriver is used at home, for example, with its help, twist and spun screws or screws, then it is applied markings:

• SL - as indicated by standard Slotted flat head screwdriver;
• PH - model with cross ferrule;
• PZ - Crosspoint tip screwdrivers with nasechonnymi thin rays.

Also, the marking may be formed as a circle with the image corresponding to the shape of the tip. For example, to indicate the flat pattern models used in the form of strips, Phillips screwdriver marked with a cross.

Also contains the information about the length of the rod and the size of the tip. For example, round marking with a slot diameter which are cut 1,5h7,5h135 mm says that before you flat screwdriver to work with the fastening fittings with slots 7,5h1,5 mm size. Stick length equal to 13.5 cm.

Crosspoint models have other markings. They applied the designation of the following form: PH 2h90 mm. This means that the length of the shaft the product is 90 mm, and 2 - a number of cap diameter fittings.

Table: dimensions of slotted screwdrivers

designation screwdrivers	Nominal Diameter, mm	Square working surface, mm	Length rod mm	Stick Length, mm	The diameter of the handle mm	The diameter of the rod, mm
0963	1.4–2.0	0.25 × 0.8	85	45	12	0.8
0964	2.5–3.0	0.4 × 1.6	1.6
0965	3.5	0.5 × 2.3	105	55	15	2.3
0966	4.0	0.6 × 2.8	155	80	18	2.8
0967	5.0	0.8 × 3.5	180	3.5
0968	6.0	1.0 × 4.5	215	90	22	4.5
0969	8.0	1.2 × 6.0	250	100	25	6.0
0971	10.0	1.6 × 8.0	8.0
0972	12.0–14.0	2.0 × 9.0	300	100	25	9.0
0973	16.0	2.5 × 11.0	11.0
0974	18.0–20.0	3.0 × 11.0	350	100	25	13.0

Reference. Russian manufacturers produce models corresponding to the established state standards. Therefore, if necessary, it is possible to find more information about the significance of the markings.

types of screwdrivers

In specialty stores is a fairly wide range. However, the most popular are just a few of them:

1. Dielectric. Necessary when working with electrical equipment. It is protected from tension and can not pass a current with a voltage of up to 1 kW. For this purpose, the entire surface is covered with rubber screwdriver or special plastic. Mainly they are used by professional electricians and electricians. It allows for safe working in the shields and electric cabinets.
2. Reversible. It includes special ratchet mechanism which emits a distinctive sound - when you turn the rod he pops. It is able to rotate only in one direction. To turn the reverse mode, press on the appropriate lever. Allows installation of the mounting accessories without removing the screwdriver from the slot.
3. Hexagon. Slots tool have the shape of a hexahedron. It allows you to make every effort at work, with the screwdriver does not goes wrong. In most cases it is used in places where strength is necessary to provide a special connection of all elements.
4. "Star". Torx drivers are particularly popular in North America. Such fasteners are typically located on a variety of electrical devices. Apply "stars" in the same place and hexagons.
5. Square. In a life-like tool does not get to meet. They are used for fixing the mounting in special hardware devices. Most slotted screwdriver square shape are used for assembly and maintenance of military equipment.
6. U-shaped. Such unusual device called spanner. The tip has two stings, and she used a screwdriver for maintenance of elevators.
7. Trihedral. Designed for professionals. It is used for binding material, which has a slot trihedral shape. They are used for opening and installation of electrical panels in remote locations where there is no direct access to boards or other electrical equipment.

Criteria for selection screwdrivers

To acquired the instrument served for a long period, and it was comfortable to use, you must correctly select it.

First, you must decide on the work front:

1. If you need to install anti-vandal system, you should use a U-shaped.
2. For wiring work suitable dielectric. You can also use a tool or indicator terminals.
3. Rapid execution of work will provide ratchet screwdriver.
4. To save money, you should pay attention to a screwdriver with removable caps of various shapes.

When buying look at the quality of the material from which made the rod and the handle. The handle must be of thick plastic and have a rubber insert. This will ensure comfortable use.

Correctly picked up a screwdriver, not only accelerates the workflow, but also makes it more efficient. A wide range of makes it easy to choose the right.