Category: Jacks. Key Features and Functions

VOLUME 3. CONTENTS

Preface 5
CHAPTER 1
DIFFERENTIAL CALCULUS OF FUNCTIONS OF SEVERAL VARIABLES
§ 1. Various types sets in n-dimensional space 7
§ 2. Functions of several variables. Limit and continuity of functions of several variables. Displays 22
§ 3. Partial derivatives. Differential of a function of several variables. Differentiable mappings 54
§ 4. Partial derivatives and differentials of higher orders. Taylor formula and Taylor series 85
§ 5. Extrema of functions 110
§ 6. Geometric applications 129
CHAPTER 2

MULTIPLE, CURVILINEAR AND SURFACE INTEGRALS
§ 7. Jordan measure. Measurable sets 145
§ 8. Multiple Riemann integral and its properties 158
§ 9. Geometric and physical applications of multiple integrals 233
§ 10. Curvilinear integrals 255
§ 11. Surface integrals 278
§ 12. Scalar and vector fields 295
CHAPTER 3
INTEGRALS DEPENDING ON PARAMETERS. FOURIER INTEGRAL. FOURIER TRANSFORM
§ 13. Proper integrals depending on the parameter 324
§ 14. Uniform convergence of improper integrals depending on the parameter 334
§ 15. Differentiation and integration with respect to the parameter of improper integrals 346
§ 16. Euler and some other integrals 360
§ 17. Fourier integral. Fourier transform 370
CHAPTER 4

INTRODUCTION TO FUNCTIONAL ANALYSIS
§ 18. Metric spaces 379
§ 19. Normed and seminormed spaces 405
§ 20. Hilbert spaces 434
§ 21. Topological spaces. Generalized functions 450
References 467

A rack and pinion (mechanical) jack is a manual gear-driven mechanism designed for lifting loads. It features a robust design, ease of maintenance and reliable operation. During operation, the rack and pinion jack allows you to smoothly move heavy loads and accurately stop at a given height. Rack and pinion jacks, along with MTM hand winches, are rightfully considered the most popular types of lifting equipment in the world. The rack and pinion jack is certainly justifiably considered one of the most reliable, durable and unpretentious lifting devices.

JSC "Kubanzheldormash" is a manufacturer of the entire line of rack jacks 3t, 5t, 8t, 10t, 14t, 20t in Russia.

Prices for rack and pinion jacks in rubles, buy a rack and pinion jack at the price:

Prices for rack and pinion jacks are indicated in rubles including VAT without delivery (factory warehouse - Russia, Krasnodar region, Armavir).
The cost of rack jacks may differ from that indicated on the website, so check the current price list for rack jacks in the marketing department;
Shipping of rack jacks is carried out by any means of transport. We regularly deliver to terminals transport companies in Armavir and shipment to the buyer's address.

Throughout the plant's 80-year history, rack and pinion jacks have always stood apart in our product line. It was rack and pinion jacks (jacking slats) that in the Soviet Union were “consumer goods” for our plant, the so-called consumer goods. At any point former USSR You can find a rack jack at a factory or cottage and you can be sure that in 999 cases out of 1000 it will be jacks produced by the Armavir Railway Engineering Plant.

Historically, the rack and pinion jack in Russia is “Kubanzheldormash”. Over the past 80 years, we have produced more than three hundred thousand rack and pinion jacks, which have been improved, become more reliable and lighter. Today we produce a full line of rack and pinion jacks, from 3 to 20 tons. The line includes rack and pinion jacks DR-3, DR-5, DR-8 M, DR-10, DR-14 and DR-20. In this line, it is worth highlighting the DR-10 with a low paw; we started producing it relatively recently, but the demand for such a design has been consistently high lately, which is associated with a large number of installations of heavy machines and production lines.

Rack and pinion jacks from JSC Kubanzheldormash are:

Unsurpassed reliability
High performance
Proven quality for 80 years from a domestic Russian manufacturer
High lifting height with minimal load on the handle
Ability to work in vertical and horizontal positions
Compact, excellent ergonomics and easy to use
Unpretentiousness, durability, high level of maintainability
Possibility of smooth lifting of the load
Special friction linings that allow you to lower the load smoothly and safely
Possibility of precise positioning of cargo at a given height
Three-year guarantee!
Low prices from the manufacturer!
Always in stock

Application of rack jacks

The industrial rack and pinion jack is a simple and reliable design, time-tested in the most severe operating conditions. Railway workers bury our jacks in ballast in the fall, dig them out in the spring and continue to use them during routine track repairs. Although such facts indicate violations in the operation of equipment, they very accurately convey the unpretentiousness and reliability of rack-and-pinion jacks produced by the Kubanzheldormash plant. It is the fully mechanical design that allows the rack and pinion jack to be used in the most difficult conditions. Unlike “gentle” hydraulic jacks, rack and pinion jacks do not require oil, are not afraid of temperature changes, and aggressive external environment, humidity and dust. An equally important trump card of any rack and pinion jack is its versatility. Industrial rack and pinion jacks are used for preliminary hanging of parts, when performing construction and installation, repair and reloading work, as well as when repairing wagons and railway tracks. Using a rack jack, you can move loads horizontally. Racks (rack jacks) are different high level security.

Construction rack and pinion jacks have a relatively small lifting capacity of 3, 5 and 8 tons, which is quite enough for most jobs. construction work. The design of such jacks is simple, single-stage. However, we produce 2 stages to reduce the load on the handle as much as possible.

Industrial models of rack and pinion jacks DR-10, DR-14 and DR-20 are distinguished by a two-stage and three-stage design; they are more complex in mechanics and heavier in weight. These industrial rack and pinion jacks are designed for harsh conditions operations where it is necessary to lift heavy loads in cramped conditions, where it is impossible to use large lifting mechanisms with an electric drive.

Please note that we produce professional rack and pinion jacks with increased load capacity, which are designed for intensive industrial use. The rack and pinion jack is widely used in railway construction, routine maintenance and repair, bridge construction, installation and installation of power lines, dismantling of building structures and in many other areas where a universal lifting jack is required.

Rack jack design

Due to the simple design of the rack jack and regardless of the model, it consists of: a body with a support leg, a gear rack, a lifting mechanism (geared blocks) that move along the rack, a handle that controls the movement of the lifting mechanism, and a ratchet mechanism for fixing the spontaneous lowering of the load. The support leg and head for lifting the load are firmly welded to the body of the rack jack.

The lifting mechanism of the jack consists of gears that rotate using a drive handle. To securely fix the load at the required height, the gear on which the handle is mounted is equipped with a ratcheting mechanism with a pawl.

1 - cover; 2 - rail; 3 - body; 4 - gear block; 5 - gear block; 6 - gear block; 7 - handle; 8 - four-prong; 9 - bolt-pin; 10 - washer; 11–15 - hardware.

In our assortment of rack and pinion jacks, it is worth highlighting the rack and pinion jack DR-10 with a low foot, which has an original design. The main feature of this jack is its extremely low lift, only 30 mm, which allows you to lift loads directly from the ground, industrial or warehouse floors.

The design of rack jacks allows you to lift a load both vertically and move it horizontally, which is very important when performing installation, lifting and rigging work in conditions industrial enterprises and warehouse complexes.

Visual diagram of a rack jack

1 - body; 2 - rail; 3 - cover; 4 - head; 5 - paw; 6 - handle; 7 - handle; 8 - ratchet; 9 - dog; 10 - heel.

How to choose the right rack and pinion jack?

Today there are a huge number of rack and pinion jacks on the market, which differ significantly in price and, accordingly, in quality. The jacks we produce cannot be compared with disposable analogues from Asia; we compete with Czech and German manufacturers. I would like to note several basic parameters that you should pay special attention to when choosing a rack and pinion jack:

Load capacity is the main criterion when choosing a rack and pinion jack. Usually expressed in tons. In our country, we are traditionally accustomed to lifting loads heavier than the jack can according to the passport, this is our fault, we always carry out tests under a load 30% more than the rated load capacity. It is better to take it with a margin of 20–30%, so that any lifting work can be carried out with maximum safety, and the jack can last as long as possible.
The maximum lifting height is the distance from the pick-up to the supporting platform at the maximum lifting of the load.
The force on the handle is a very important parameter to which we always draw the attention of our Customers. It is not for nothing that we introduce the second and third stages to facilitate labor during lifting operations. Try to twist any five-ton jack, and you will understand that it is not so easy even for a strong man. We make jacks for maximum ease of use, so one person can easily turn a rack and pinion jack, capable of lifting twenty tons.
Stability - main characteristic safety when operating any jack, the risk of injury often depends on stability. We manufacture all jacks with a large support platform, which allows the operator to be confident that the jack will not fall or tilt under the weight of the load. The special design of the support platform ensures minimal subsidence of the rack jack into concrete (asphalt, crushed stone, gravel, soil, etc.) and does not allow the jack to slide along the surface.
The lower claw or pick-up is the part of the jack that picks up the load from below. We pay great attention chemical composition the metal from which the lifting heel is made, as well as the quality of welding. The smaller the height between the paw and the ground, the more opportunities there are to lift the load from a minimum height from the ground.

For 85 years, the Kubanzheldormash plant has been producing the entire line of rack and pinion jacks, from “light” three-ton and five-ton jacks to industrial ones with a lifting capacity of fourteen and twenty tons. Do right choice! Buy rack and pinion jacks from the manufacturer or from authorized dealers throughout the country.

Technical specifications for rack and pinion jacks:

Model	Load capacity, t		Stroke (lift height), mm	Handle force, N	Height from sole to foot, mm	Dimensions, LxWxH	Weight, kg
Model	on the heel	on the paw	Stroke (lift height), mm	Handle force, N	Height from sole to foot, mm	Dimensions, LxWxH	Weight, kg
DR-3	3	2,1	345	270	45	195x290x735	21
DR-5	5	5	350	200	90	330x280x710	38
DR-8M	8	8	350	200	90	330x280x710	39
DR-10	10	7	350	270	25	245x200x795	44
DR-14	14	10	320	250	110	368x323x750	57
DR-20	20	14	300	300	105	320x400x900	90

The rack jack is selected according to its load capacity and lifting height (rack travel). But you should also pay close attention to the minimum pick-up height and lifting height - these two parameters determine from what height from the ground you can grab a load and to what height you can lift it using a rack-and-pinion jack.

We offer wide choose rack jacks from 3 to 20 tons own production. In our product line you can find rack jacks to solve any rigging problems.

Have you decided to buy a rack and pinion jack? Kubanzheldormash plant, Armavir - reliability, quality and the best price!

If you need to order rack jacks for your own needs, you just need to contact the marketing department by visiting the page

A crusher of this type is used for processing materials such as coal, glass, cement, slate, fireclay, ceramics, silicon, etc. As a result of processing, a homogeneous fraction is obtained at the output of the machine, ranging in size from 1 to 20 mm, the parameters of which are adjusted by the operator.

In an hour, this device is capable of producing up to 300 kg of fractional mixture. The device weighs 280 kg and is equipped with a control panel that regulates the parameters of engine speed and fraction size.

This machine is widely used in construction industry in order to reduce waste and process it into secondary raw materials for the production of new materials.

Reception window dimensions, mm	100×200
Productivity, kg/h	300
Output fraction, mm	1-20 (adjustable)
Weight, kg	350
Energy consumption, kW/h	1.5
Receiving tray volume, l	15
Power consumption, kW	5.5
Supply voltage, V	380
Cheek width, mm	196×202
Dimensions, L×W×H	1,200×800×1,600
Cost, rub.	125 000

Jaw crusher DR-2-Shch and DR-3-Shch

The jaw crusher DR-2-Shch has a productivity of 1500 kg/h, weighs 450 kg and engine power is 7.5 kW.

This device is capable of processing materials up to 250×400 mm in size and obtaining from them a homogeneous fraction of a size specified by the operator. The more powerful DR-3-Shch machine weighs 650 kg and is capable of grinding up to 3000 kg of raw materials per hour.

A distinctive feature of these devices is greater reliability, high performance, ease of management and affordable cost.

Crushers are used stationary, because They have quite large dimensions and weight, but in the event of a production move they can be easily transformed to a new location.

Model	DR-2-Shch	DR-3-SH
Reception window dimensions, mm	250×400	300×500
Productivity, kg/h	1 500	3 000
Weight, kg	450	650
power, kWt	7.5	15
Shaft rotation speed, rpm	300
Supply voltage, V	380
Dimensions, L×W×H	950×750×750	1,300×1,000×800
Cost, rub.	260 000	330 000 RUB 300,000

A small jaw crusher is perfect for small and medium-sized industries. The engine, with a power of 3 kW, is powered by a 380 V network and is capable of processing up to 300 kg of recyclable materials per hour.

Various construction defects can be used as raw materials - these are bricks, blocks, curbs and other materials. The device has a convenient location of the loading hopper, so it can be easily included in the line after the transport conveyor.

Thanks to the use of high-strength metal for smelting the cheeks, the machine has a long service life and does not require frequent repairs.

Mains voltage, V	380
Voltage frequency, Hz	50
Power consumption, kW/h	3
Productivity, kg/h	up to 300
Force on cheeks, t	8
Neck dimensions, mm	150×100
Dimensions, L×W×H, mm	1,000×500×700
Weight, kg	300
Cost, rub.	165 000

3DP Net is an extremely useful utility that allows you to determine the model and install the appropriate driver for the network card installed on your computer. In fact, we have before us a separate tool from a comprehensive program for updating and installing missing drivers called . It is not difficult to guess why the developers decided to “isolate” a separate application from this complex. The fact is that without a driver for a network card, you will not be able to connect to the network and, as a result, update other drivers using.

The main advantage of 3DP Net is that the program (which, in general, is logical) does not require an Internet connection, and all the necessary drivers are already included with the program. The user can only launch the application, wait until it detects the network card model and selects the appropriate one software for her from her “library”. 3DP Net works equally effectively with both “desktop” computers and laptops. It is completely free, does not require installation, and is even translated into Russian. In general, we have before us an extremely useful tool that can come in handy at any time.