A mechanical bender may be used to make bends in.

Circle:2.4Square:3Rectangle:1.4. Outside diameter of rigid conduit. 2.5"-2.875"3"-3.5"4"-4.5". Shrink. Length lost when bending conduit. Must be added to the center of the bend to get proper measurements. Study with Quizlet and memorize flashcards containing terms like Shrink Constant/Multiplier-22.5° bend, Shrink …

A mechanical bender may be used to make bends in.. a-mechanical-bender-may-be-used-to-make-bends-in 2 Downloaded from w2share.lis.ic.unicamp.br on 2019-07-18 by guest advantages and limitations of different press types and processes. The Iron Age 1900 Copper Günter Joseph 1998-12-31 This book provides an overview of the technical and commercial

The mark on the bender that is used to bend a 90 degree stub is typically a 90 degree mark on the long arm of the bender. This mark may appear as a “V”, a “G”, a “K”, or a “D”, and will usually be indicated by a 90 degree angle in the shape of one of these symbols. To properly bend a 90 degree stub, you must line up the pipe so ...

Allow the tool assembly to rock forward as you complete the bend. Q. Should offset bends be made on the floor or with bender head in the air? A. Offsets in small conduits (½-in. EMT, ¾-in. EMT, and ½-in. rigid or IMC) may be bent in the air. However, when making the second bend to complete the offset, some journeymen prefer to bend …Apr 28, 2023 · To use the deduct figure, measure the distance to the far edge of the 90 and subtract the deduct figure. If ½" pipe is being bent and the distance is 56", place a mark on the conduit at 51"; this is where the bender will be placed. Work the bender onto the conduit with the conduit mark at the arrow of the bender. A Mechanical Bender May Be Used To Make Bends In a-mechanical-bender-may-be-used-to-make-bends-in 3 Downloaded from test1.inets.us on 2021-09-03 by guest Electrotechnology Electrician Aligned with the latest Australian and New Zealand standards, the text references the Wiring Rules (AS/NZS 3000:2018) and follows the uniform structure and systemThe common name for a ratcheting mechanical bender is a ? bender. b The length of conduit that moves past the conduit support or roller in order to measure the amount of …The Loop Stitch - The lock stitch mechanism is used by most sewing machines. Learn about the loop stitch, the chain stitch and the lock stitch and how stitch mechanisms in sewing m...Things to remember while bending: 1. A proper bend is made by rolling the conduit about the bender in the conduit’s cradle using all foot pressure. 2. Use the correct size bender for the conduit size being bent. 3. Some over bending may be required to allow for spring back of the conduit. The resting condition of the conduit is to be atIn order to use an EMT hand bender to bend rigid conduit, what factors should be considered? Select one: a. The bender should be designed for use with both EMT and rigid conduit. b. The hook of the bender may be sprung by using it to bend rigid. c. The next larger sized bender should be used; for example, using a 3/4 " EMT bender for 1/2" rigid. d.

Heat benders are used on big jobs, but for small jobs, 45° and 90° elbows can be purchased and glued together to complete the run if no heat benders are available. Also, an EMT bender can be used to bend small degree bends or “kicks” in PVC. Use an EMT bender to bend 30° kick in the PVC conduit by bending it to 60° and then theAllow the tool assembly to rock forward as you complete the bend. Q. Should offset bends be made on the floor or with bender head in the air? A. Offsets in small conduits (½-in. EMT, ¾-in. EMT, and ½-in. rigid or IMC) may be bent in the air. However, when making the second bend to complete the offset, some journeymen prefer to bend …Pipe bends, often referred to as “elbows”, are special pipeline components, widely used in onshore buried steel pipelines. They are sensitive to imposed deformations and their structural behavior is quite flexible and associated with the development of significant stress and strain, which may lead to failure. In the present paper, the …a-mechanical-bender-may-be-used-to-make-bends-in 2 Downloaded from archive.nafc.org on 2021-03-20 by guest broken into four sections. Each section covers the techniques and procedures required for a technician to maximize the energy efficiency of HVAC systems. 1. Airflow: Covers the properties of air, airflow measuring tools, CFM calculations ...Hydraulic benders are often used for rigid conduit or for conduits in sizes from 2½ to 5 inches, which are too large for electric benders. They make smooth, round bends without conduit squeeze or bulge and without splitting pipe seams. Power for hydraulic pumps is provided manually or by electric pump motors.After the first 90° bend has been made, measure to the point where the back of the second bend is to be, “B”. Step 2. Measure and mark your conduit the same distance, mark “B”. Step 3. Align the mark on the conduit with the Star-Point on the bender and bend to 90°. 3 Star-Point on bender must be referenced for accurate bends.

A Mechanical Bender May Be Used To Make Bends In ... Bending, 2020 Edition, is a quick, on-the-job reference specifically designed to provide the most commonly required information on how to properly bend conduit, including information on bending types and techniques. An ideal tool for electricians, contractors, instructors, and students, thisEngineering. Mechanical Engineering questions and answers. 12 Abend used for a change in direction of less than 90° is called a (n) a kick b. saddle c. stub-up d. offset 13. A mechanical bender may be used to make bends in a. 2" EMT b. 4" rigid conduit c. 14Pvc d. IMC conduit only 14.Hydraulic benders are often used for rigid conduit or for conduits in sizes from 2½ to 5 inches, which are too large for electric benders. They make smooth, round bends without conduit squeeze or bulge and without splitting pipe seams. Power for hydraulic pumps is provided manually or by electric pump motors.See the Operation section of this manual. Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070... Page 9 1. Select the size and type of conduit. Measure the height of the obstruction and the distance labeled LENGTH TO CENTER. Determine the angle to be used. 2.Conduit Bending 26204-14 Mechanical Benders • Hickeys and EMT bending tools are used on smaller conduit and runs with few bends. • Mechanical benders can be used to duplicate multiple bends with minimal effort. Select the correct bender shoe for the type and size of conduit in use.

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A Mechanical Bender May Be Used To Make Bends In Domestic Engineering and the Journal of Mechanical Contracting 1926 Forming and Forging S. L. Semiatin 1988 Provides an in-depth review of a number of processes recently introduced or that have come into acceptance such as radial, rotary (orbital), precision, powder, and isothermal/hot-die forging.Allow the tool assembly to rock forward as you complete the bend. Q. Should offset bends be made on the floor or with bender head in the air? A. Offsets in small conduits (½-in. EMT, ¾-in. EMT, and ½-in. rigid or IMC) may be bent in the air. However, when making the second bend to complete the offset, some journeymen prefer to bend …Tube bending is any metal forming processes used to permanently form pipes or tubing. Tube bending may be form-bound or use freeform-bending procedures, and it may use heat supported or cold forming procedures. Form bound bending procedures like “press bending” or “rotary draw bending” are used to form the work piece into the shape of a die.To prevent flattening when bending larger diameter PVC conduit, use. 60 to 180-degrees of bend, depending on the type of bends. A saddle bend is counted as. 40. You are making a 20-inch offset with two 30 degree bends. The distance between bends is _________ inches. the amount of travel method to monitor each bend. Montana State University – Northern Associate Professor of Electrical Technology Trygve "Spike" Magelssen and Instructor Jim Kirkpatrick Manual: shorturl.at... a. use a PVC cutter for trade sizes 2 (MD 53) and larger. b. use PVC cement on the inside and outside surfaces of the fitting only. c. use PVC cement on the ends of both pieces to be joined. d. press the conduit and fitting together and rotate about two turns to …

determine distance between bends. Measure length (L) from end of conduit to offset and add shrinkage (see Table 3). Mark this length on conduit (C). Subtract distance between bends and mark point (X). The first bend should be made at (C), put (STAR) or B at (C). Then make your bends at (X) & (Y). Using arrow on bender, Back-to-Back Bend 90° BendAttaches To Most Standard 12 Or 20 Ton Hydraulic Shop Presses. Examples For Mild Steel:3/16" X 12" Width ; 5/16" X 6” Width ; 3/8” X 3” Width. Create Complex Shapes. Check Latest Price. The press brake is a metal bending tool that allows for metalworkers to bend sheet metal.Apr 28, 2023 · To use the deduct figure, measure the distance to the far edge of the 90 and subtract the deduct figure. If ½" pipe is being bent and the distance is 56", place a mark on the conduit at 51"; this is where the bender will be placed. Work the bender onto the conduit with the conduit mark at the arrow of the bender. 1 1/4", 1". In order to use an EMT hand bender to bend rigid conduit, what factors should be considered? Select one: a. The bender should be designed for use with both EMT and rigid conduit. b. The hook of the bender may be sprung by using it to bend rigid. c. The next larger sized bender should be used; for example, using a 3/4 " EMT bender ...Tube Benders for Tight Spaces. Handle-free and one quarter the size of traditional tube benders, these benders fit in small, hard-to-reach spaces. Attach a 1/4" -drive ratchet wrench or extension to make bends in copper and aluminum tubing, such as brake and fuel lines— even if they're installed. Max.coat the shoe with WD-40® or petroleum jelly. Three-inch rigid conduit is bent using a (n) _____. Hydraulic bender. Which of the following is a type of bending shoe? Segment. Springback is a term used to describe the _____. tendency of the conduit to relax to a bend angle slightly less than that indicated on the bender pointer. when the bender ...Only use the bender to bend … Web1. Figure 1 is an overall view of the mechanical bender and a detail of the bender head. 2. The tubing should be clean and free from defects. 3. Always grease the die block prior to … WebA Mechanical Bender May Be Used To Make Bends In a-mechanical-bender-may-be-used-to-make-bends-in 3• Strong Frame — keeps bender in place during bending. • Speed-bend Mode — bypasses ratchet for fast, direct bending of smaller sizes of conduit. Features that make the 1818 superior • No storage box required. All of the shoes may be stored on the bender. Note: Bender holds follow bars, rollers and pins so the• Unplug bender from any power source before disassembling, reassembling, and repairing any parts. • Operator must ALWAYS face the front of the bender with the bending degree scale visible and maintain a minimum of 3 feet distance while the conduit is being bent. All other personnel must remain out of the area while the bender is in operation.Secure the conduit in a bending device or vice to ensure stability during the bending process. Position yourself in a comfortable stance and align the bending device or bender with the marked location on the conduit. Apply consistent pressure to the bending device, gradually bending the conduit to a 45-degree angle.

Mar 26, 2024 · As an example, the FlectePro 259AEMI is a 25-mm, all-electric tube bender with nine electric servo axes (bend, feed, rotate, horizontal, vertical, clamp die, pressure die, PDA, mandrel). The BendPro control system on this machine allows the electric servo clamp and pressure dies to set their own close positions against the tube, with virtually ...

1800 Mechanical Bender Illustrated Bending Glossary 1.back-to-back bend — any U-shaped bend formed by two parallel 90° bends with a straight section of conduit or pipe between the bends. 2.center-to-center distance — the distance between the successive bends that make up an offset or a three-bend saddle.bending. • Speed-bend Mode — bypasses ratchet for fast, direct bending of smaller sizes of conduit. Features that make the 1818 superior • No storage box required. All of the shoes may be stored on the bender. Note: Bender holds follow bars, rollers and pins so the complete unit may be chained to a post for security.A hand bender with no radius shoe and is used to make bends in rigid conduit. Hickey Sizes. Available in 1/2" and 3/4" and 1" rigid pipe sizes. ... A tube or lever used to hold the bender while in use. Bender Foot Pedal. The part of the bender where foot pressure is applied in order to bend the conduit. Die. A common rule thumb for best appearance states that the individual bands of a segmented band should be no more than ___ ____ and no more than 4" apart. 6. A ______ bend consist of a series of small Bend made at a predetermined locations on a piece of conduit to create one large bend. Segmented. Follow the steps from the 90° Stub-Up section to create the ideal bend for the connection on the first side. From the back edge of the 90° stub-up bend, measure the distance found in step 1 and make your mark on the conduit. Place the bender on the conduit with the bender’s hook facing the free end of the tube to be. A mechanical bender may be used to make bends in _____. 2" EMT You are making a concentric bend and the radius of the first bend in 16", the OD of the first pipe conduit is 2", and the spacing between conduit runs is 3". Using “bend” as a noun: “Bend” is primarily used as a verb, but occasionally people mistakenly use it as a noun. It is important to remember that when referring to a curved shape, the correct noun form is “bend” and not “bended.”. For example, instead of saying, “The bended of the road,” it should be, “The bend of the road

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Hydraulic benders are often used for rigid conduit or for conduits in sizes from 2½ to 5 inches, which are too large for electric benders. They make smooth, round bends without conduit squeeze or bulge and without splitting pipe seams. Power for hydraulic pumps is provided manually or by electric pump motors.The 1800 Mechanical Bender is a manually powered bender intended to bend 1/2", 3/4" and 1" rigid conduit, IMC (intermediate metallic conduit), and Schedule 40 pipe. Safety is …Stub-up. The _____ length is the actual length of the conduit that will be bent. Developed Length. Also called a kick, a (n) _____ is two bends placed in a piece of conduit in order to navigate around obstructions. Offset. _____ bends are large bends that are formed by multiple short bends or shots. Segment bend.Mechanical keyboards, or keyboards with full, individual switches under every key, have exploded in popularity recently, although the technology inside is as old as the keyboard it...NJATC, Conduit Bending And Fabrication 2007, PP 36. 1/16th of an inch. When calculating the distance between bends, at a known angle, the formula used is what? NJATC, Conduit Bending And Fabrication 2007, PP 34. D = M x O. where D = distance. M = distance multiplier (30 deg = 2) O = offset rise, in inches. Define Gain.A hickey bender is used to bend conduit in small bends with short segments, for instance, in order to bend a 90° bend with this type of bender you would bend 9 each 10° bends …The pipe bending process begins with loading a pipe or a tube into a pipe bending machine and clamping it into place among two dies – the clamping block and the forming die. Two other dies loosely hold the pipe itself – the pressure die, and the wiper die. The pipe bending procedure includes using mechanical force to push stock pipe or ...Die. A common rule thumb for best appearance states that the individual bands of a segmented band should be no more than ___ ____ and no more than 4" apart. 6. A ______ bend consist of a series of small Bend made at a predetermined locations on a piece of conduit to create one large bend. Segmented. ….

Circle:2.4Square:3Rectangle:1.4. Outside diameter of rigid conduit. 2.5"-2.875"3"-3.5"4"-4.5". Shrink. Length lost when bending conduit. Must be added to the center of the bend to get proper measurements. Study with Quizlet and memorize flashcards containing terms like Shrink Constant/Multiplier-22.5° bend, Shrink Constant/Multiplier-30° bend ...Match the bender mark, part, or type with the description of its use. Used to indicate when the desired angle has been made. Answer 1 Guides the bender as the bend is made. Answer 2 Available for 1/2", 3/4", and 1" RMC. Answer 3 When bending a stub 90, this mark is aligned with the pencil mark on the conduit. Answer 4 Indicates the center of a …A Mechanical Bender May Be Used To Make Bends In Copper and Copper Alloys Joseph R. Davis 2001-01-01 This handbook is a comprehensive guide to the selection and applications of copper and copper alloys, which constitute one of the largest and most diverse families of engineering materials. The handbook includes all of the essential352.24 Bends — How Made. Bends shall be so made that the conduit will not be damaged and the internal diameter of the conduit will not be effectively reduced. Field bends shall be made only with bending equipment identified for the purpose. The radius of the curve to the centerline of such bends shall not be less than shown in Table …Optimal treatment results during the finishing stages of treatment (Chap. 8) are often contingent on localised wire bending to correct individual final tooth position in all three dimensions (antero-posterior, transverse and vertical). Wire bending may be undertaken over 2–3 visits prior to removal of the fixed appliances.A sheet metal brake is a machine that bends metal sheets into desired shapes and sizes. The machine works by clamping the metal sheet between two dies shaped to produce the desired bend. The dies are then brought together at high speed, forcing the sheet to bend and form around them. This process is called ‘braking’. 1800 Mechanical Bender Illustrated Bending Glossary 1. back-to-back bend — any U-shaped bend formed by two parallel 90° bends with a straight section of conduit or pipe between the bends. 2. center-to-center distance — the distance between the successive bends that make up an offset or a three-bend saddle. Mechanical benders A mechanical ratchet bender is used on one-half to 2-inch conduit, benefiting the electrician with the mechanical advantage the long handle provides. A mechanical bender may be used to make bends in _____. 2" EMT You are making a concentric bend and the radius of the first bend in 16", the OD of the first pipe conduit is 2", and the spacing between conduit runs is 3". A mechanical bender may be used to make bends in., A Mechanical Bender May Be Used To Make Bends In Ugly’s Conduit Bending, 2020 Edition Alan W. Stanfield 2020-03-13 Updated to reflect the 2020 National Electrical Code (NEC), Ugly’s Conduit Bending, 2020 Edition, is a quick, on-the-job reference specifically designed to provide the most commonly required information on how to properly , Rothenberger USA model E-688 High-Speed Bender, for bending one-half- to 2-inch rigid, IMC, EMT, and 40-mil PVC-coated conduit, operates horizontally or vertically and bends 2-inch conduit to 90 degrees in 16 seconds. The unit features a double-relay solid-state controller. An adjustable limit switch allows for consistent, identical repetitive ..., A Mechanical Bender May Be Used To Make Bends In The Cement Era 1911 Airframe Maintenance and Repair United States. Department of the Air Force 1964 The Iron Age 1900 Ugly’s Conduit Bending, 2020 Edition Alan W. Stanfield 2020-03-13 Updated to reflect the 2020 National Electrical Code (NEC), Ugly’s Conduit, A hand bender with no radius shoe and is used to make bends in rigid conduit. Hickey Sizes. Available in 1/2" and 3/4" and 1" rigid pipe sizes. ... A tube or lever used to hold the bender while in use. Bender Foot Pedal. The part of the bender where foot pressure is applied in order to bend the conduit., 4. Hydraulic benders are capable of bending rigid pipe up to and including _____. 5" trade size or 6 inches in diameter. A single change in direction of less than 90° is known as a (n) _____. kick. One of the characteristics of aluminum conduit is that it _____. is lightweight and difficult to bend consistently and accurately., Using “bend” as a noun: “Bend” is primarily used as a verb, but occasionally people mistakenly use it as a noun. It is important to remember that when referring to a curved shape, the correct noun form is “bend” and not “bended.”. For example, instead of saying, “The bended of the road,” it should be, “The bend of the road, Intro To Conduit Bending CHP 2. Hand Benders. Click the card to flip 👆. Are used to make bends in conduit up to 1 1/4" EMT. Click the card to flip 👆. 1 / 37., The 1800 Mechanical Bender is a manually powered bender intended to bend 1/2", 3/4" and 1" rigid conduit, IMC (intermediate metallic conduit), and Schedule 40 pipe. Safety Safety is essential in the use and maintenance of Greenlee tools and equipment. This instruction manual and any markings on the tool provide information for, A mechanical bender is used to make bends in several types of conduits or tubes, including 1-1/2" PVC, 2" EMT, 4" rigid conduit and IMC. It's widely used in the electrical and construction industry. However, its capability can vary, always check the tool's specifications. Explanation: , A mechanical ventilator is a machine that helps with breathing. This article discusses the use of mechanical ventilators in infants. A mechanical ventilator is a machine that helps..., Proceedings of First International Conference on Emerging Trends in Mechanical Engineering Ugly’s Conduit Bending, 2020 Edition Alan W. Stanfield 2020-03-13 Updated to reflect the 2020 National Electrical Code (NEC), Ugly’s Conduit Bending, 2020 Edition, is a quick, on-the-job reference specifically , 1800 Mechanical Bender Illustrated Bending Glossary 1.back-to-back bend — any U-shaped bend formed by two parallel 90° bends with a straight section of conduit or pipe between the bends. 2.center-to-center distance — the distance between the successive bends that make up an offset or a three-bend saddle., Terms in this set (50) The center of bend marks are usually indicated on a new mechanical/electric bender (or its shoes). False. The centers of the various standard …, Which of the following is used to bend IMC? A hickey. A damp sponge or cloth can be used to set bends in ____. PVC. The formula pie x Distance is used to calculate _____. circumference. Two junction boxes are each located on different walls, 12 inches from the same corner. Given a 90* bend with a take-up of 6 inches and a gain 2-1/4 inches ..., Hydraulic benders are often used for rigid conduit or for conduits in sizes from 2½ to 5 inches, which are too large for electric benders. They make smooth, round bends without conduit squeeze or bulge and without splitting pipe seams. Power for hydraulic pumps is provided manually or by electric pump motors., Type. Mechanical Bender. Conduit Type. EMT, IMC, Rigid And Aluminum Rigid. Application. Conduit Bending. Replacement Part. 1818G1 Frame And Undercarriage Unit Only, 19988G Wheel, Non-flat. *Greenlee® may make improvements and/or changes in the specifications of products at any time, in its sole discretion, without notice or …, The formula π • D is used to calculate. Circumference. Two junction boxes are each located on different walls, 12 inches from the same corner. Given a 90 degree bend will take up six inches and a gain of 2 - 1 /4 inches, what is the developed length of conduit between them? 21- 3/4 inches. 2 90 degree bends in the same piece of conduit are ..., In order to use an EMT hand bender to bend rigid conduit, what factors should be considered? Select one: a. The bender should be designed for use with both EMT and rigid conduit. b. The hook of the bender may be sprung by using it to bend rigid. c. The next larger sized bender should be used; for example, using a 3/4 " EMT bender for 1/2" rigid. d., Mar 27, 2020 ... Comments12 · Using the Greenlee 881 Hydraulic Bender to bend a 15 inch offset in 3 inch EMT · Bending a 90 degree stub-up in 4 inch EMT conduit ..., The common name for a ratcheting mechanical bender is a ? bender. b The length of conduit that moves past the conduit support or roller in order to measure the amount of …, How many bend centers should be found for each groove in a bending shoe when using a mechanical or electric bender? 4 (15, 22.5, 30, 45) What is the most common angle to use when determining the radius adjustment for a given bender shoe?, a-mechanical-bender-may-be-used-to-make-bends-in 3 Downloaded from w2share.lis.ic.unicamp.br on 2019-01-31 by guest How one California metal fabricator has survived Silicon Valley - TheFabricator.com Rage Against The Machine's 20 greatest guitar moments, ranked - Guitar.com Malco Shows Off New Products at METALCON 2023 - …, Mark this distance on the conduit and use a pipe bender to make a sharp 90-degree bend. 45-Degree Bend: A 45-degree bend is often used when a more gradual turn is needed. Measure the required distance for the bend, mark it on the conduit, and use the bender to create a smooth arc with a 45-degree angle., Stub-up. The _____ length is the actual length of the conduit that will be bent. Developed Length. Also called a kick, a (n) _____ is two bends placed in a piece of conduit in order to navigate around obstructions. Offset. _____ bends are large bends that are formed by multiple short bends or shots. Segment bend. , 4 Different Degrees. 15, 22 1/2, 30, and 45. When is the most common angle to use when determining the Radius Adjustment for a given bender shoe? 45 Degrees. The maximum number of degrees per shot for an exposed segmented bend is ____ degrees. 6 Degrees. The term which describes the amount of conduit or the segmented portion of a …, 1801 Mechanical Bender Illustrated Bending Glossary 1. back-to-back bend — any U-shaped bend formed by two parallel 90° bends with a straight section of conduit or pipe between the bends. 2. center-to-center distance — the distance between the successive bends that make up an offset or a three-bend saddle. , Stub-up. The _____ length is the actual length of the conduit that will be bent. Developed Length. Also called a kick, a (n) _____ is two bends placed in a piece of conduit in order to navigate around obstructions. Offset. _____ bends are large bends that are formed by multiple short bends or shots. Segment bend. , Die. A common rule thumb for best appearance states that the individual bands of a segmented band should be no more than ___ ____ and no more than 4" apart. 6. A ______ bend consist of a series of small Bend made at a predetermined locations on a piece of conduit to create one large bend. Segmented., A Mechanical Bender May Be Used To Make Bends In ... Ugly's Conduit Bending, 2017 Edition Stanfield 2017-01-15 Updated to reflect the 2017 National Electrical Code (NEC), Ugly’s Conduit Bending, 2017 Edition, is a quick, on-the-job reference specifically designed to ... generators, mechanical power transmission, and electricalpower ..., Bending Gage - Gage with an adjustable pointer that lets you set it at the desired angle to get a precise bend. Bending Protractor - Made for use with benders mounted on a bending table and used to measure degrees; also has a scale for 18, 20,21 and 22 shots when using it to make a large sweep bend., Study with Quizlet and memorize flashcards containing terms like The center of bend marks are usually indicated on a new mechanical/electric bender (or its shoes)., The centers of the various standard bend angles must be found, and the shoe(s) marked on a new mechanical or electric bender in order to use the push-through method of bending., A multi-groove bending shoe is to be fully charted ..., 5. Mechanical Bending Machine. Mechanical bending refers to the use of motors, wheels, gears, or levers to initiate a compressive or tensile force on the metal workpiece. These metal bending machines can have automatic or manual operation modes. Pipe bending and plate rolling machines are two popular examples of mechanical bending., Hydraulic benders are often used for rigid conduit or for conduits in sizes from 2½ to 5 inches, which are too large for electric benders. They make smooth, round bends without conduit squeeze or bulge and without splitting pipe seams. Power for hydraulic pumps is provided manually or by electric pump motors.