Since ancient times, in the course of its economic activity, mankind often had to use such durable materials as sedimentary rocks, asphalt and concrete. As experience has shown, it is very difficult to split or loosen them without the appropriate equipment. The solution to this problem was the appearance of jack hammers equipped with special interchangeable nozzles.
What is the principle of action of the "chippers"?
A jackhammer is a mechanical hand tool that performs impact with its working part (metal chisel or lance) on the surface of various materials. Work using this tool takes on a mechanical character. The peaks for the jackhammer are affected by mechanical impulses that the striker sends. It is set in motion by special drives. The peak for the jackhammer is exposed to this effect at a frequency of 16-25 Hz. The principle of operation itself is to cut or split various hard rocks. Having received a shock impulse from the striker, the peak for the jackhammer, using its working cutting edge, loosens or splits the hardest materials.
Peak device
The interchangeable nozzle is a rod that is inserted at one end into a jackhammer. For this purpose, the design of the “chippers” has special chambers, with the help of which reliable fixation of nozzles is carried out. Shanks are divided into several types. The peaks intended for "chippers" are equipped with cylindrical shanks, suitable for both jackhammers and automatic hammers. If interchangeable nozzles are incompatible with equipment chambers, special adapters can be used - adapters.
The second end of the rod is a pointed working part, which performs various operations. Regardless of the size of the rod and the shape of its working part, peaks are very effective in all types of work. Using interchangeable nozzles for jackhammers, it is possible to punch holes in concrete, brick, reinforced concrete and granite surfaces of various sizes. According to the reviews of the owners, for a modern person, work on laying water pipes is unthinkable without the use of these nozzles.
Manufacturers
The following enterprises are engaged in the production of peak for jackhammers in the Russian Federation:
- LLC "Artmax" (Tomsk).
- LLC Avtospetsmash (Cherepovets).
- LLC Ural Plant of Pneumatic Machines (Zlatoust).
- LLC Agat (St. Petersburg).
Features of cross wedge rolling
The main task that the peaks for the jackhammer perform is a short-term force impact on the workpiece. This is taken into account in the manufacturing technology of these interchangeable tools. The nozzle manufacturing procedure is a wedge rolling. The work consists in the fact that the steel billet is subjected to a single heating, after which the product is formed. The rolling principle itself is that the stress created in the product after a one-time heat treatment is evenly and uniformly distributed along the fibers.
As a result, this method provides a high-quality tool that does not have thermal boundaries. Due to this production technology, the thermal stress in the metal is significantly minimized. Residual stresses caused by the heating of the product, in the process of "rolling" are sent along the metal fibers. In addition, the peak for the jackhammer made in this way has perfect axial geometry. A similar result cannot be achieved if the peak is heated separately in parts or several heat treatment cycles are used.
Why is axial geometry important in a product?
As evidenced by the numerous reviews of the owners of these removable tools, the peak for the jackhammer must necessarily have a flawless center line. This requirement is due to the fact that as a result of a high frequency of impacts in the metal, the voltage increases, which negatively affects the strength of the peaks. This is especially bad for those tools in the production of which their straightness is not guaranteed.
How to choose the desired peak?
Peaks for a pneumatic jackhammer are able to provide high productivity of the labor process if they are selected according to the type of planned work. In order for the work to be carried out not only quickly, but also without damage to the equipment, it is important to take into account one more nuance: the buyer must determine what type the equipment used is, since for each individual model there is a corresponding peak for a jackhammer. St. Petersburg represents several manufacturers of these products. The most popular tools on the modern market are the products of the trading company manufacturer Promtehosnastka. This company produces the following types of interchangeable nozzles:
- Peaked peaks. P-11 - for a jackhammer.
- P-31 - a chisel.
- P-41 - shoulder blade.
Where is the peaked peak used?
“Lomik” - such a second name because of its peculiar shape received the peak of a jackhammer (MO). The price of P-11 is 125 rubles. This nozzle is also used for pneumatic jack hammers (MOS series). The production of peaked peaks should be carried out in compliance with all production requirements and standards. The nozzle P-11 is represented by a special design: its shape resembles a pointed tetrahedral pyramid.
This tool is used for the following types of work:
- Destruction of hard surfaces of roads (asphalts).
- Loosening of frozen soil.
- Dismantling of brick and concrete walls.
- Work with rocks.
Mining is the most common area in which these nozzles are used.
Product Description
- Shank of cylindrical type.
- Shank length is 7 cm.
- Volume - 0.24 cm.
- The length of the entire product is 320 mm.
- For the manufacture of peaks, structural grade 50 carbon steel is used.
- The weight of the peaks is 1.2 kg.
- Country of origin - Russia.
- The tool comes with a one year warranty.
The use of P-41
This type of nozzle is intended only for working with jackhammers. The principle of operation of the P-41 is a short-term directional impact (impact) on solid material. Due to the design features and special production technology, spade blades have high strength characteristics.
According to the reviews of the owners of these products, this replacement tool is very effective for the following types of work:
- Cleaning walls from plaster.
- Felling and crushing of individual segments of small size in brick and asphalt surfaces.
- Work with large concrete surfaces.
- Using this nozzle, you can work with the edges in concrete structures.
Specifications
- The length of the P-41 is 315 mm.
- Shank length - 7 cm.
- Diameter - 0.24 cm.
- The length of the shock is 50-70 mm.
- Shank type - cylindrical.
- The weight of the peaks does not exceed 1.2 kg.
- U – 8 - steel grade from which these peaks for a jackhammer are made.
- The price of production is 170 rubles.
Application and product description P – 31
As evidenced by numerous consumer reviews, due to the geometrical parameters that distinguish chisels from Promtehosnastka, this interchangeable tool is very convenient to work with such material as frozen ground, concrete and brickwork. Using P-31, it is easy to chip layers from very hard surfaces.
- In the production of this type of peaks, craftsmen apply high-quality structural carbon steel grade 45, which is subjected to heat treatment. Strength and fluidity are considered characteristic properties for this brand. Nozzles made of this steel are highly resistant to various physical influences.
- Convenience when working with reinforced concrete products is another quality that a peak for a jackhammer has. "Promtehosnastka" is a manufacturer, which widely uses the technology of cross-wedge rolling in the process of manufacturing its nozzles. P – 31 “chisel” is recommended for long-term work. As positive reviews indicate, this peak is very effective in conditions of heavy use.
- The working surface has a length of 3-5 cm.
- The length of the cylindrical shank P - 31 is 7 cm.
- Shank volume - 0.24 cm.
- The size of the whole product is 315 mm.
- Weight - 1.2 kg.
It is recommended to use this nozzle when working with concrete and reinforced concrete structures. Using the P-31 product, you can easily cut through niches in various durable materials.
Extended options
Peak length is considered a very important product parameter. Depends on it how deep the hole in the surface will be after applying this nozzle in the “chipper”.
Standard peak dimensions do not exceed 350 mm, and their weight is 1.2 kg. There are also non-standard, or elongated, options for products such as P – 11 and P – 31 on the market for tools. For their marking, the following designations are used: P – 11U and P – 31U. In such interchangeable tools, the dimensions of the cylindrical shanks remain the same (7 cm), and the working part itself is lengthened. Thus, the pointed peak of the elongated sample has a length of 3000 mm. Non-standard chisel has the same dimensions: P – 31U. Feedback from users who have used these tools in their work is positive. Due to the large size, these non-standard products are very effective for working in the most inaccessible places.
Today, many trading companies specializing in the manufacture of peak for jackhammers, also carry out individual orders. Depending on the preferences of the consumer, interchangeable nozzles can be made of the steel grade proposed by the customer.