The dimensions between the piece and the tool bit can be changed about two axes to cut both vertically and horizontally into the internal surface. The cutting tool is usually single point, made of M2 and M3 high-speed steel or P10 and P01 carbide. A tapered hole can be made by simultaneously feeding the cutting edge in both the radial and axial directions.

Boring machines come in a large variety of sizes and styles. Boring operations on small workpieces can be carried out on a lathe while larger workpieces are machined on boring mills. Workpieces are commonly 1 to 4 metres (3 ft 3 in to 13 ft 1 in) in diameter, but can be as large as 20 m (66 ft). Power requirements can be as much as 200 horsepower (150 kW). Cooling of the bores is done through a hollow passageway through the boring bar where coolant can flow freely. Tungsten-alloy disks are sealed in the bar to counteract vibration and chatter during boring. The control systems can be computer-based, allowing for automation and increased consistency.

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Harvey Industries is an industry leader in designing and manufacturing exhaust systems for a variety of industries. Our overhead exhaust systems are ideal solutions for automotive facilities such as body and repair shops, as well as service departments at car dealerships.

Vehicle exhaust fumes are just a small fraction of the hazards involved in the public transportation industry. Keeping workshops safe and well organized helps maintain a positive workplace for your employees, and that starts with a proper exhaust system to filter out harmful gases and vapors.

Because boring is meant to decrease the product tolerances on pre-existing holes, several design considerations apply. First, large length-to-bore-diameters are not preferred due to cutting tool deflection. Next, through holes are preferred over blind holes (holes that do not traverse the thickness of the work piece). Interrupted internal working surfaces—where the cutting tool and surface have discontinuous contact—are preferably avoided. The boring bar is the protruding arm of the machine that holds the cutting tool(s), and must be very rigid.[2]

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Lathe boring usually requires that the workpiece be held in the chuck and rotated. As the workpiece is rotated, a boring bar with an insert attached to the tip of the bar is fed into an existing hole. When the cutting tool engages the workpiece, a chip is formed. Depending on the type of tool used, the material, and the feed rate, the chip may be continuous or segmented. The surface produced is called a bore.

The HRX-812's elliptically shaped aluminum rail allows for efficient airflow and sleek styling. The easy-glide trolley assembly allows drops to be shared among bays (check state and local codes). It also features pinned joints to guarantee easy alignment of rail sections and our “Positive Pull" nut and bolt joining system with gasketed seams to ensure a simple, trouble-free installation.Trolley assembly can be fitted with the standard #TS-30 drop or the #3-Skyhook balancing pull-up configuration or any of the RHR series hose reels. The heavy duty trolley assembly is fitted with eight ball bearing wheels for smooth operation.Rail systems also available for heavy duty transit truck/bus or industrial applications.

Lathe boring[3] is a cutting operation that uses a single-point cutting tool or a boring head to produce conical or cylindrical surfaces by enlarging an existing opening in a workpiece. For nontapered holes, the cutting tool moves parallel to the axis of rotation. For tapered holes, the cutting tool moves at an angle to the axis of rotation. Geometries ranging from simple to extremely complex in a variety of diameters can be produced using boring applications. Boring is one of the most basic lathe operations next to turning and drilling.

Because of the limitations on tooling design imposed by the fact that the workpiece mostly surrounds the tool, boring is inherently somewhat more challenging than turning, in terms of decreased toolholding rigidity, increased clearance angle requirements (limiting the amount of support that can be given to the cutting edge), and difficulty of inspection of the resulting surface (size, form, surface roughness). These are the reasons why boring is viewed as an area of machining practice in its own right, separate from turning, with its own tips, tricks, challenges, and body of expertise, despite the fact that they are in some ways identical.

Surface finish (roughness) in boring may range from 8 to 250 microinches, with a typical range between 32 and 125 microinches.

Housings, wheels, and frames are welded providing heavy construction and assuring solid, rattle-free units. Wheels are supported by heavy cast iron hubs and are static and dynamically balanced. Belt drive units are equipped with variable speed drives.Clockwise rotation wheel and bottom horizontal discharge housing is standard. Discharge may be changed to any one of eight directions at job site or specified on order. Direct drive, BD-7 and BD-8 belt drive blowers are either forward curve or radial blade. All other belt drive blowers are backward curve. All blowers comply with AMCA Standard 210 and bear the AMCA Seal.Various types of installations may require accessories for the blower such as:

The process industries, while all very diverse, have one thing in common: around the clock, continuous production. These demanding production schedules get a lot accomplished, but they also create a continuous need for proper ventilation and exhaust.

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Sometimes a part may require higher accuracy of form and size than can be provided by boring. For example, even in optimized boring, the amount that the diameter varies on different portions of the bore is seldom less than 3 micrometre (.0001 inches, "a tenth"), and it may easily be 5 to 20 micrometre (.0002-.0008 inches, "2 to 8 tenths"). Taper, roundness error, and cylindricity error of such a hole, although they would be considered negligible in most other parts, may be unacceptable for a few applications. For such parts, internal cylindrical grinding is a typical follow-up operation. Often a part will be roughed and semifinished in the machining operation, then heat treated, and finally, finished by internal cylindrical grinding.

Because of the factors just mentioned, deep-hole drilling and deep-hole boring are inherently challenging areas of practice that demand special tooling and techniques. Nevertheless, technologies have been developed that produce deep holes with impressive accuracy. In most cases they involve multiple cutting points, diametrically opposed, whose deflection forces cancel each other out. They also usually involve delivery of cutting fluid pumped under pressure through the tool to orifices near the cutting edges. Gun drilling and cannon boring are classic examples. First developed to make the barrels of firearms and artillery, these machining techniques find wide use today for manufacturing in many industries.

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The four most commonly used workholding devices are the three-jaw chuck, the four-jaw chuck, the collet, and the faceplate. The three-jaw chuck is used to hold round or hex workpieces because the work is automatically centered. On these chucks the runout faces limitations; on late-model CNCs, it can be quite low if all conditions are excellent, but traditionally it is usually at least .001-.003 in (0.025-0.075 mm). The four-jaw chuck is used either to hold irregular shapes or to hold round or hex to extremely low runout (with time spent indicating and clamping each piece), in both cases because of its independent action on each jaw. The face plate is also used for irregular shapes. Collets combine self-centering chucking with low runout, but they involve higher costs.

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Blower Limited WarrantyShould any failure due to defective workmanship or material occur within 12 months from date of shipment, replacement of defective part only will be made promptly without charge. This warranty does not cover ordinary wear and tear, abuse, misuse, overloading, altered products, or materials not of seller's manufacture.

Various fixed cycles for boring are available in CNC controls. These are preprogrammed subroutines that move the tool through successive passes of cut, retract, advance, cut again, retract again, return to the initial position, and so on. These are called using G-codes such as G76, G85, G86, G87, G88, G89; and also by other less common codes specific to particular control builders or machine tool builders.

The limitations of boring in terms of its geometric accuracy (form, position) and the hardness of the workpiece have been shrinking in recent decades as machining technology continues to advance. For example, new grades of carbide and ceramic cutting inserts have increased the accuracy and surface quality that can be achieved without grinding, and have increased the range of workpiece hardness values that are workable. However, working to tolerances of only a few micrometres (a few tenths) forces the manufacturing process to rationally confront, and compensate for, the fact that no actual workpiece is ideally rigid and immobile. Each time a cut is taken (no matter how small), or a temperature change of a few hundred degrees takes place (no matter how temporary), the workpiece, or a portion of it, is likely to spring into a new shape, even if the movement is extremely small. In some cases a movement of a fraction of a micrometre in one area is amplified in lever fashion to create a positional error of several micrometres for a feature of the workpiece several decimetres away. It is factors such as these that sometimes preclude finishing by boring and turning as opposed to internal and external cylindrical grinding. At the extreme, no perfection of machining or grinding may be enough when, despite the part being within tolerance when it is made, it warps out of tolerance in following days or months. When engineers are confronted with such a case, it drives the quest to find other workpiece materials, or alternate designs that avoid relying so heavily on the immobility of part features on the micro or nano scales.

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An overhead system is easily installed in an existing or new building. A single drop is normally located at the side of the stall approximately 1' behind the rear vehicle bumper. The ductwork should be at an elevation of 15' to 16' A.F.F., which would then allow the standard 20' hose drop to attach to either right or left side mounted tailpipes.An overhead drop is installed by slipping the overhead coupler over the appropriate size stub or airflow “T" of the ductwork. The overhead coupler is held in place with a bolt through the assembly.For dual exhaust vehicles, a “Y" harness should be used in conjunction with the overhead drop.Various types of pull-up sets are available to retract hose drops when not in use, such as Harvey's No. 1, 2, 3, or 4 Skyhooks.System Options and Components

For most lathe boring applications, tolerances greater than ±0.010 in (±0.25 mm) are easily held. Tolerances from there down to ±0.005 in (±0.13 mm) are usually held without especial difficulty or expense, even in deep holes. Tolerances between ±0.004 in (±0.10 mm) and ±0.001 in (±0.025 mm) are where the challenge begins rising. In deep holes with tolerances this tight, the limiting factor is just as often the geometric constraint as the size constraint. In other words, it may be easy to hold the diameter within .002" at any diametrical measurement point, but difficult to hold the cylindricity of the hole to within a zone delimited by the .002" constraint, across more than 5 diameters of hole depth (depth measured in terms of diameter:depth aspect ratio). For highest-precision applications, tolerances can generally be held within ±0.0005 in (±0.013 mm) only for shallow holes. In some cases tolerances as tight as ±0.0001 in (±0.0038 mm) can be held in shallow holes, but it is expensive, with 100% inspection and loss of nonconforming parts adding to the cost. Grinding, honing, and lapping are the recourse for when the limits of boring repeatability and accuracy have been met.

The boring process can be executed on various machine tools, including (1) general-purpose or universal machines, such as lathes (/turning centers) or milling machines (/machining centers), and (2) machines designed to specialize in boring as a primary function, such as jig borers and boring machines or boring mills, which include vertical boring mills (workpiece rotates around a vertical axis while boring bar/head moves linearly; essentially a vertical lathe) and horizontal boring mills (workpiece sits on a table while the boring bar rotates around a horizontal axis; essentially a specialized horizontal milling machine).

Harvey Industries designs and build a complete line of exhaust extraction equipment for any heavy duty applications.Please contact the factory or your local rep for assistance in the design of any custom configuration.

The geometry produced by lathe boring is usually of two types: straight holes and tapered holes. Several diameters can also be added to each shape hole if required. To produce a taper, the tool may be fed at an angle to the axis of rotation or both feed and axial motions may be concurrent. Straight holes and counterbores are produced by moving the tool parallel to the axis of workpiece rotation.

Harvey Industries is an industry leader in designing and manufacturing exhaust systems for a variety of industries. Our heavy duty exhaust systems are ideal solutions for facilities working with diesel vehicles or vehicles with large horizontal tailpipes like heavy duty trucks.Service bays and garages dealing with heavy duty trucks have different requirements from regular car repair facilities, and our exhaust systems can meet those requirements!While standard car repair shops and garages typically work with cars with four-inch tailpipes, the trucking industry typically works with tailpipes that are longer than four inches, meaning a different exhaust system is needed. We can work with you to design a custom system to meet your needs.

The material handling industry plays a vital role in the transportation, storage and distribution of various materials and goods. Operating material handling machinery and equipment such as forklifts and tow tractors in a confined warehouse or factory creates harmful emissions such as carbon monoxide. If you do not have a proper exhaust or ventilation system in place to filter out these emissions, they can cause an array of complications for your employees.

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Does your shop or facility follow OSHA regulations for fume extraction? According to the OSHA, welding and metalworking fumes can cause serious health issues in workers. Short term exposure can cause nausea, dizziness, and irritation to the nose and throat, while long term exposure can lead to cancer, nervous system damage, kidney damage, and more. The success of your business hinges on the performance of your employees, so it's important that you maintain a safe and healthy work environment.

AR Series Rubber Stack/Tailpipe AdapterA-Smooth bore mounting base for use with smooth bore hose.FMETGFor use on vehicles with flush mount or recessed tailpipes. The wire form is installed in the tailpipe adapter and the flexible metal bar is inserted into the tailpipe to hold the hose and tailpipe adapter in place.Stainless Steel Tapered Adapter With Spring Closing CoverSpecifically for rubber, silicone fiberglass, or metal tubing.Hose CouplersCast aluminum hose coupler used to connect various lengths of rubber hose when “Twist Lock" feature not available.Hose GuidesStandard with all Harvey underground units. The hose guide serves two purposes: to guide the rubber hose easily through the underground system and to prevent rags, etc. from being sucked into the system. Also available for metal tubing.H-3422 Floor Fitting (2 ½" Hose)Old style floor fitting, replacement units available.Cast Aluminum “Y" FittingsFor use in “Y" harnesses.Energy Saving DampersMounted in the hose drop of an overhead system to cut off the majority of air flow when not in use.Elbow for Lifting Overhead DropsCast aluminum elbow joins two hose lengths and eliminates kinking of hose when pulled up out of the way. Used in place of damper.Overhead Duct CouplersHarvey Overhead Duct Couplers simplify installation of overhead rubber drops. One end of the cast aluminum coupler threads into the rubber hose and the other end slips over stub of the duct work. A bolt through the assembly completes installation of the overhead drop.

Many power plants are powered by coal and oil—materials that give off harmful toxins when burned. It's important to keep your workers safe and keep your plant up to code, and an exhaust system from Harvey Industries will help you accomplish both.Many energy companies in the U.S. produce energy using fossil fuels such as oil, natural gas, and coal. When fossil fuels are burned, harmful gases such as carbon dioxide, sulfur dioxide, methane, and nitrous oxide are released into the air. Even clean energy sources such as nuclear power are associated with toxic or radioactive discharge. These harmful emissions can wreak havoc on your employees' health, which is why it's imperative to have a proper exhaust system in place.

There are so many benefits to recycling, but we often don't think about the unsanitary part of the recycling industry. What many people don't realize is that recycled materials have the potential to let off toxic gases and fumes.Recyclable items may consist of solid waste and other types of unsanitary debris. These materials are typically mixed with water, which can then lead to toxification. In addition, processes like hot-melt granulation of waste plastics emit fumes and potentially dangerous chemicals and emissions such as hydrochloric acid, sulfur dioxide, dioxins, furans, heavy metals, and particulates. These emissions are known to cause respiratory problems and can potentially cause cancer—things that no employer wants for their employees down the line.

There are various types of boring. The boring bar may be supported on both ends (which only works if the existing hole is a through hole), or it may be supported at one end (which works for both, through holes and blind holes). Lineboring (line boring, line-boring) implies the former. Backboring (back boring, back-boring) is the process of reaching through an existing hole and then boring on the "back" side of the workpiece (relative to the machine headstock).

The Harvey Automatic Retractable Hose Reel offers one of the most convenient methods available for extracting harmful exhaust fumes and gases from all types of service areas. The carbon spring-operated hose reel is designed for years of trouble-free service and can be adapted for use with ALL types of vehicles.The exhaust hose supplied with the reel is fabricated of Silicone Fiberglass with an internal wire helix and rubber coated. It is high heat resistant to 600 degrees and meets U.S. military and commercial specifications as well as United States Air Force requirement for high temperature stability.A Harvey Hose Reel is shipped prewound and complete with the following components:

Harvey “Twist-Lock" Non-Crush Rubber Exhaust HoseHarvey “Twist-Lock" hose represents the latest advancements in technology and fabrication of rubber hose for our industry. Under normal service conditions, the hose is heat resistant in excess of 550℉. The “Twist-Lock" feature enables an individual to connect several lengths of hose together without the use of couplers.Note: rubber hose is not recommended for Dynamometers.Tailpipe AdaptersTo avoid continual replacement of exhaust hose, tailpipe adapters should be used. Harvey tailpipe adapters are available for all sizes of hose and tubing and are manufactured in rubber and stainless steel.Offerings Also IncludeHarness “Y" HarnessReplacement Hose Assemblies for Underground SystemsAccordion Flex Hose Measured Extended

The body of the PS Floor Fitting is plastic molded from high-temperature resistant polyethylene. The top flange and lid of the PS Fitting is cast aluminum with the 5/16" thick lid having a tensile strength of 35,000 pounds. The lid is attached to the flange with a heavy-gauge, all stainless steel piano hinge for easy maintenance.When in the open position, the lid rests solidly on the floor. The molded plastic Floor Fitting offers reduced costs and is impervious to all the elements for years of trouble-free service. The base is designed to fit the Harvey Molded Plastic Pipe Saddle, which allows for approximately 4" height adjustment.System Options and Components

The Harvey model #TS-30 is “TELESCOPICALLY®" designed to simplify and improve upon existing overhead exhaust drops currently available. The #TS-30 consists of three lengths of lightweight, flexible tubing that slide one into another and give the appearance of only one 6' length of tubing attached to the overhead duct.The tubing and tailpipe adapter that connect to the vehicle are non-crush, neoprene rubber. Drive over it! The tubing and adapter cannot be crushed or damaged. Pull-up sets are not required with the #TS-30 and #TS-40 drops.

The Harvey Thru-The-Door System is designed for service stations and garages where the door is directly behind the vehicle. Harvey Door Ports are all cast aluminum for years of trouble-free service. They are supplied with all hardware necessary for installation.Thru-Wall Exhaust Systems are offered for installations requiring wall ports in place of door ports. Stainless steel wall tube assemblies are available for this application.

Boring and turning have abrasive counterparts in internal and external cylindrical grinding. Each process is chosen based on the requirements and parameter values of a particular application.

In machining, boring is the process of enlarging a hole that has already been drilled (or cast) by means of a single-point cutting tool (or of a boring head containing several such tools), such as in boring a gun barrel or an engine cylinder. Boring is used to achieve greater accuracy of the diameter of a hole, and can be used to cut a tapered hole. Boring can be viewed as the internal-diameter counterpart to turning, which cuts external diameters.