How to Bearing puller maintenance and care Inspect the puller before each use to check for any wear or damage. Replace any damaged or worn parts with authorised parts. After each use, store in a case if provided, or in a safe place.
How to Select a hydraulic system when you to buy hydraulic pullerWhen choosing the proper system for a specific application, several points must be considered:Puller ReachPuller reach is the available distance between the pulling surface of the jaw and the jaw headof the puller. This distance varies and decreases as jaws are opened. When choosing a puller,make certain the reach is sufficient to attach the puller.Puller SpreadPuller spread is twice the distance from the ram to the pulling surface of the jaw. In choosingthe proper puller make certain the puller has a large enough spread to attach to the objectbeing removed.TonnageTonnage is the maximum pulling force that can be safely exerted by the puller. Tonnage maybe estimated by looking at the torque curves. The maximum force exerted in tons shouldbe seven to ten times the diameter of the shaft in inches. IE: a 1.5 inch diameter shaftwould generally require a 15-ton hydraulic puller.PumpThe pump must have the adequate oil output and reservoir capacity to power the cylinder.
ROLLER BEARINGS VS BALL BEARINGS – THE MAJOR DIFFERENCES Have you ever wondered what the difference was between roller bearings and ball bearings? At first glance they may not seem all that different. However, these seemingly similar style bearings have very different uses. We’re showing you how bearings work, and what the differences are between these engineering gems. How Bearings Work In general, bearings are all composed of the same basic mechanics: a ball set within an internal or external ring. This setup allows for force to be placed on the ball, referred to as loading. There are two different types of loading with bearings; thrust and radial. If your bearing is working with a radial load, this means the bearing will rotate, or roll when put under tension. Alternatively, a thrust load will be subject to force dependant on the angle. Bearings have been around for hundreds of years and have many different uses, some of which include aiding in rolling (a tire), pulling, applications in hard drives, skateboards, and more. Ball Bearings ball bearing In small amounts of weight, this extremely common bearing is able to handle both thrust and radial load, making it a popular bearing with engineers. When ball bearings are in motion their main job is to transfer the load from the outer raceway to the inner raceway. This allows for a smooth spin. Ball bearings are commonly used in small wheels and hard drives, as well as other everyday applications, but are prone to deformation when under too much pressure. Roller Bearings roller bearingsUnlike ball bearings, roller bearings are designed with heavy loads in mind. These bearings are primarily based around a cylinder, meaning this bearing is able to distribute a load over a large area, carrying heavy weights. Also unlike ball bearings, roller bearings are not made to handle thrust loads.
Can you delivery tools to FBA warehouse? Yes,If you sell tools in Ebay ,Amazon,wish,etc,we can help you to logo customized ,packing designed or customized,And all FBA warehouse required,and delivery to your FBA warehouse. Which port will be loading? Ningbo Port or Shanghai Port is common.because We located in Ningbo City,only 40 Min to Ningbo Port and 2.5 hours to Shanghai Port. How do you make our business long-term and good relationship? 1. We keep good quality and competitive price to ensure our customers benefit ; 2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from. Can you made tool according sample or drawing? and How to control the quality of tools? Yes, we accept. because we are a factory and own R&D team, if you offer the sample, we will draw the drawing and to make if you offer drawing, we also can make it for customers.Our QC Man will check all products step by step from material to finish according to the drawing.
45# is high quality carbon structural steel, carbon content is 0.42-0.50%, with 610 Mpa tensile strength , and yield point is 360 Mpa;45# steel is widely used in machinery manufacturing, mechanical properties of this steel is very good, so it’s generally used as axial parts.40Cr is alloy structural steel, carbon content is 0.37-0.45%,0.8-1.1% chromium, 1000 Mpa tensile strength, yield strength is 800 Mpa; generally used to parts which can be loaded with large force.42CrMo also belongs to alloy structural steel, carbon content is 0.38-0.45%, 0.9-1.2% chromium, 0.15-0.25% molybdenum, 1100 Mpa tensile strength, yield point is 950 Mpa .usually used to high reliability & bigger load required parts.
-What are you trying to pull? Are you trying to pull a shaft out of something, pull something out of a hole or pull something off a shaft? This will help you determine if you need a push-puller, jaw-type puller, slide hammer or one with internal or external-internal adapters.-Determine the reach and spread you need. This will make sure your puller is long enough and the jaws, if applicable, open wide enough to exert enough force to pull the object.-Estimate the force required. Normally, if you account for reach and spread, DNT’s pullers will have enough force. When in doubt, always use the next larger size to account for frozen or rusted parts. Now that you’ve determined what you’re trying to pull, find a corresponding puller to finish the job. -If you’re pulling something off a shaft, you can use a jaw-type, push-puller, slide hammer or bearing puller with attachment. This includes removing a gear, bearing, wheel or pulley-If your job includes pulling something out of a hole, look for internal pulling attachments coupled with a slide hammer or a push-puller.This option helps remove internal bearing cups, retainers or oil seals that are press-fitted-When you need to pull a shaft out of something, look for threaded adapters, internal or external, for use with slide hammers or a push-puller. Typically you need these pullers when removing a transmission shaft or pinion shaft from a bore or housing. Regardless of puller selected, always keep the tool clean and frequently lubricate the forcing screw fully to extend the tool’s life. With tons of force, we can’t stress safety enough when using pullers. Before using one of our pullers, we recommend reading the DNT safety puller information sheet, found here.
How To Test A Tool's Quality at the Hardware Store Buying hand tools can be a confusing—and at times a losing—proposition. When faced with aisles full of putty knives, hammers, utility knives, and other toolbox must-haves, it’s tough to know if you’re really getting the best product for your money. If you’re like most people, you’ve probably purchased a few tools in the past that ended up breaking during use or rusting into a corroded mess soon after you brought them home, and you'd like to avoid that disappointing experience in the future. Learn more follow 7 tips:1. Look Up!One of the simplest tricks for locating quality tools is to “look on the shelves above eye level,” Retail stores position mid-quality tools at eye level because those are the tools that most customers purchase—but they may not offer the best bang for your buck. With tools, as with many things in life, higher quality often comes at a slightly higher price. The superior materials and the manufacturing methods used to create better tools add a little to the final cost. Instead of grabbing the first putty knife you see, shift your focus upward. That’s where you’ll find higher-quality tools, 2. Feel the WeightWhen shopping for a quality tool, “take it down off the shelf and feel the weight,” “A lightweight utility knife might be cheaper, but it might not feel as good in your hand.” Imagine using the tool: Is it substantial enough for you to grip firmly? Typically, a higher-quality tool will be little heavier than a substandard model.There are exceptions, however. If a tool is used overhead—for example, when a wide taping knife is being used to smooth joint compound on ceilings—a heavy tool can be a burden. Consider how you will be using the tool, and then factor in whether it’s the best weight for your needs.3. Look for Tools That MultitaskWhile higher-quality tools will often cost more, you can actually save money and still get top-notch durability and performance by choosing a tool that multitasks rather than buying many separate tools. “Additional benefits and features just make life easier,” A good example of a multitasking tool is the HYDE 5-in-1 Painter's Tool. This single tool opens paint cans, widens cracks for patching, doubles as a paint scraper or putty knife, and removes wet paint from a roller. Not only will you save money by buying a high-quality multipurpose tool instead of five (or more) individual tools to do the same work, you won’t have to lug around a lot of heavy tools in your tool belt—and you’ll get years of dependable service4. Know Your SteelA cheap, flexible tool is probably OK for a small or one-time job, but with repeated use, it can bend without resuming its original shape. Quality materials make for a quality tool. “Carbon steel is great for many hand tools,” “because it can be hardened to various degrees of rigidity, but there’s a problem—it rusts. The next step up, quality-wise, is stainless steel, which will cost more but won't pose the same issue.”Usually Alloy steel is better than carbon steel, high carbon steel is better than general steel 5. Consider ComfortA tool with a poorly designed grip can leave you with aching muscles and tendons, or even blisters, if it doesn’t fit well in your hand. For repetitive-motion tasks, such as scraping paint from a fence or taping a room's worth of drywall joints, “look for a well-formed, cushioned grip that will absorb some of the motion or impact,” Ergonomic handles and comfort grips allow you to complete your task without discomfort. Before buying, hold the tool in your hand as you would if you were using it. Does the handle feel good in your grasp? The bottom line: If a tool fits your hand comfortably, you’ll be able to work longer with less wrist and arm fatigue.6. Look for Full Tang ConstructionFor example the knife, Perhaps the best indicator that a taping knife or putty knife will stand the test of time is full tang construction, which just means that “the metal in the blade goes all the way from the end of the handle to the tip of the blade,” “It’s one solid piece, so it will hold up better under pressure.”Partial tang construction, on the other hand—which is often found in cheaper knives—features a tang that extends only a short way into the handle. After a few uses, a partial tang handle is likely to work loose, and then you’re stuck having to buy another knife to complete your project. Full tang knives last longer and offer increased leverage when performing tasks that require lateral pressure on the blade, such as prying a baseboard away from a wall. Sometimes, you can look at the handle of the knife from the side to see if the tang runs all the way to the end of the handle, though knives with overmold grips will fully encase the handle portion of the tang. If a knife is made with full tang construction, it should say so on the packaging.7. Check Out the WarrantyWhen a manufacturer is confident that their product is top-notch, they’re more likely to offer a long-term or lifetime warranty against defects. Check the tool’s packaging for an indication that the manufacturer is offering a warranty.
What are difference between S2 material and CRV material Comparing the two, if the hardness is compared, Cr-V is better. If the tool steel is used, because tool steel generally requires impact resistance, strong torsion, high hardness, low stress, etc., S2 has more advantages.S2 steel, with a hardness of 60 degrees, is durable. It is impact-resistant and vibration-resistant steel.Chromium vanadium steel is an alloy tool steel with chromium-vanadium alloy elements added, and the hardness after heat treatment is 60HRC (Rockwell hardness) or more (the general tool industry uses 45-degree chromium-vanadium steel).Chrome vanadium steel: Cr-VChromium vanadium steel is an alloy tool steel with chromium (Cr) and vanadium (V) alloy elements added. Its strength and toughness are better than carbon steel, and it is suitable as an ideal material for high-quality tools. Such as wrenches, sockets, screwdrivers, etc.Chrome molybdenum steel: Cr-MoIt is an alloy of chromium (Cr), molybdenum (Mo), iron (Fe), and carbon (C). It has excellent impact resistance, excellent strength, and toughness, and overall performance is better than chrome vanadium steel. Suitable for making screwdrivers, etc.S2 tool steel.Is carbon (C), silicon (Si), manganeseS2 steel, hardness up to 60 degrees, durable. It is impact resistant and vibration resistant steelChromium vanadium steel is an alloy tool steel with chromium-vanadium alloy elements added, and the hardness after heat treatment is 60HRC (Rockwell hardness) or more (the general tool industry uses 45-degree chromium-vanadium steel)Comparing the two, if the hardness is compared, Cr-V is better. If the tool steel is used, because tool steel generally requires impact resistance, strong torsion, high hardness, low stress, etc., S2 has more advantages.S2 steel, hardness up to 60 degrees, durable. It is impact resistant and vibration resistant steelChromium vanadium steel is an alloy tool steel with chromium-vanadium alloy elements added, and the hardness after heat treatment is 60HRC (Rockwell hardness) or more (the general tool industry uses 45-degree chromium-vanadium steel)Chrome vanadium steel is different from S2 tool steel in terms of composition. Second, the S2 tool steel can be reddened-ancient red, and the color is very beautiful, but chrome vanadium steel cannot. The following is an introduction to the two sheets of steel.Chromium vanadium steel, element symbol Cr-V, is an alloy tool steel with chromium-vanadium alloy elements added. The hardness after heat treatment is 45-60HRC (Rockwell hardness), and it has good wear resistance under specific working conditions.S2 tool steel and S2 tool steel rod make hardware tools, such as bit, bit nozzle (batch nozzle), screwdriver bit, screwdriver bit, shaft, with very good performance, long life, and high toughness.
Where to buy DNT puller set DNT Puller is made by DNT tool factory from Chinese.Up to now, you only can buy DNT Puller from our website:nbdntools.com, or inquiry from mail: info@nbdntools.com.Because DNT Tools is a factory, and now only accepted wholesale,and offer OEM service for brand tools company, such as snap on , OEM Tools, ks tools and so on.If you are going to sell puller online, or you are looking for puller manufacturer or supplier and Tools Source from China, pls contact us and inquiry.
40CR Alloy steel Material: GB 40CR Alloy steel(SAE-AISI 5140 steel ) Chemical composition of 40Cr steel rade C Si Mn Cr Ni(≤) Cu(≤) P(≤) S(≤)40Cr 0.37-0.44 0.17-0.37 0.5-0.8 0.8-1.0 0.3 0.03 0.035 0.035Physical property of 40Cr Sample blank size (mm):25 The first quenching heating temperature (ºC):850; coolant: Oil Second quenching heating temperature (ºC):- Tempering heating temperature (ºC):520; Tensile strength (σb/MPa): ≥980 The yield point (σs/MPa): ≥785 Elongation (δ5/%): ≥9 Section shrinkage (ψ/%): ≥45 3-jaw gear puller40CR alloy steel is used to produce bearing pullers because it provides them with a very strong structure that is able to withstand wear.Bearing pullers need to be able to remove bearings, gears or pulleys without becoming easily worn or damaged.2. Heat Treatedheat treatmentBearing pullers are heat treated for increased wear and strength.3. Chrome platedChrome platedThe bearing pullers are chrome plated to resist corrosion. Corrosion is when iron reacts with oxygen and forms a reddish-brown oxide that we know as rust. When steel corrodes it deteriorates and eventually decays over time.
What's Different types of pullers and the key features to consider Trying to remove shaft-mounted components without using the right types of puller can be frustrating and time-consuming. Interference fits, dirt, and corrosion can make the removal process difficult.Trying alternatives to pullers, such as cutting, torching, or hammering presents clear safety risks. Furthermore, there’s also the likelihood of causing damage to the machine components you are trying to maintain!Mechanical and hydraulic pullers are great tools for removing components across many different industrial sectors. Smaller types of puller are widely used by technicians in places such as small automotive workshops. Larger higher tonnage models are used throughout heavy industries, such as those shown in the diagram below.Projects requiring the use of a puller usually involve the maintenance of rotating equipment. Common components to remove include bearings, gears, wheels, pins, bushings, sleeves, couplers, sprockets, and pulleys. What are the main types of pullers?There are many different types of pullers available to choose from. If you select one best suited to your application, you’ll get the job done safely, efficiently – and without causing damage.Two Jaw and Three Jaw PullersThe most common types of pullers are available in either 3 jaws or 2 jaw configurations. 3 jaw pullers are the most widely used because the extra jaw helps distribute the force more evenly. But where access is limited a 2-jaw puller can be used, provided it is used carefully.Mechanical and Hydraulic PullersMechanical pullers work by rotating a crossbar which moves the center bolt/force screw towards the shaft.Hydraulic pullers include an integral hydraulic cylinder that is powered by a pump to apply the required force. The plunger then provides direct, non-twisting application of thrust, which is more effective and more secure.If you’re looking specifically for tools to remove bearings, there’s a number of dedicated tools designed for this. For example, Enerpac offers bearing pullers, bearing separators, and bearing cup pullers.Internal PullersThese are used to remove shaft-mounted parts where no spindle support is available. An internal puller is used with an attached slide hammer which allows a high-impact force to be applied.Features to consider when choosing a pullerTwo or three jaws?As described above, where space permits it is best to use a 3 jaw puller. They are safer and easier to use.Hydraulic vs mechanicalHydraulic types of pullers are easier to operate than their mechanical equivalents, but you will need a pump, hose, and gauge. Depending upon the size of the puller, the pump may be powered by hand, air, or electricity.ReachThe reach is the available distance between the pulling surface of the jaw and the jaw head of the puller. This distance varies and decreases as the jaws open. Enerpac lock grip pullers offer an impressive reach-to-diameter ratio. This is because they include a different method to the cage system that others use. Additionally, the inside profile of the jaws allows for deeper components to be pulled.Synchronous and Self-Centering JawsThe synchronous feature of Enerpac lock grip pullers allows all jaws to move simultaneously. Benefits of this feature are that the spindle stays centered on the shaft, misalignment is prevented, set up requires fewer people, and takes and less time.Locking MechanismThe locking mechanism helps prevent jaws from slipping off the application during the pulling process. Turning the puller handle locks the jaws onto the application – allowing the shaft mounted component be pulled free when the spindle is turned.SpreadThe spread is simply the diameter that the jaws extend to. Usually up to 25 inchesTonnagePullers are available with a wide range of capacities. The majority of models available range somewhere between 2 and 64 imperial tons. However, specialist 2 and 3 jaw 100-ton puller units are available from Enerpac. These large and heavy products are mounted on a cart with an on-board lift and hydraulic pump.Buy Puller SetsPullers are available to buy individually, or as part of a set. If you expect to carry out different pulling jobs regularly then consider buying a set. A typical set will include the puller, a pump, a hose, and pressure gauge. Master puller sets include not just one puller type but also, cross bearing puller, a bearing separator, and a bearing cup puller.
Pullers DNT's pullers family include two-leg pullers, three-leg pullers, hydraulic pullers, expansion pullers for interiors, pullers for separators and separators, special pullers, hydraulic presses and pullers for damaged screws and stud bolts.Pullers are designed for removal of mechanical parts seized on shafts or housings.Pulling of bearings, pulleys or other gears does not present too many problems when these parts have not been altered by natural wear. However oxidation, overheating by friction or extensive sevice may change their original dimension, thus causing seizing. In this case, the use of a puller alone may not be enough to provide extraction without damage; the part should first be heated, vibrated or treated with solvents to eliminate the deformation of its components or oxide deposits.It is therefore necessary to operate with extreme care and skill, otherwise even such a solid tool, apparently indestructible and fit for the heaviest jobs, can be damaged without obtaining the desired results.Designed for industrial maintenance, the DNT pullers may conveniently be used in automotive applications as well. These rugged and robust tools ensure greater efficiency by means of their rigid body, levers and joints being avoided whenever possible for better gripping power and more dependable pulling. This is most advantageous when three or more legged pullers are put to use as it means better distribution of the pulling stress from all the legs at the same time.
What bearing pullers sizes are available? Puller Reach Bearing pullers are measured according to their reach.The puller’s reach is the available distance between the pulling surface of the legs and the head of the legs. When the legs are opened, the distance increases and decreases. Sizes Bearing pullers come in sizes of 75mm (2.9″), 100mm (3.9″), 150mm (5.9″) and 200mm (7.8″). Claw legs They are available with two or three claw legs. Both do the same job, however the three legged puller offers more stability when removing parts.The two legged puller can move side to side even when it is locked.
What type of bearing puller should I use? Choosing the right bearing puller for dismounting your bearings is critical. The safety and ease of removing the bearing will depend on the correct bearing puller being selected.In this article, we’ll explain the types of bearing puller available and how to decide which one is right for your application.What is a bearing puller?A bearing puller is a tool which is used to remove components such as bearings, gears and pulleys from a shaft or a recess. The puller securely grips the component with specially designed jaws before driving it off the shaft.Bearing pullers are used in every industry for safely and effectively dismounting bearings. Whether you’re working in the automotive industry or the food and beverage industry, a bearing pulley could facilitate easy dismounting of your bearings and other components.Why use a bearing puller?Bearing pullers are one of the most effective methods of cold dismounting. When a component is securely mounted and cannot be loosened manually, that’s where bearing pullers come in.This could include situations where a damaged part has led to machine breakdown. The failed component must be removed as quickly and as safely as possible in order to keep downtime to a minimum.If you don’t have any specialist tools around, it could be tempting to use a hammer and brute force to remove the bearing. However, this can lead to surrounding components becoming damaged, causing further downtime.A bearing puller can efficiently remove the stuck component from the shaft or recess, without causing any damage to the shaft or other surrounding components. This helps to promote the uptime and reliability of your machinery.Bearing pullers also offer a safe method of bearing removal when compared to techniques such as brute force or naked flames. Leading manufacturers such as SKF have optimised their bearing puller designs to ensure that they enable maximum worker safety. After all, no business wants to see their staff injured.What are the types of bearing puller?Every bearing puller fall into the broad categories of either an external bearing puller and an internal bearing puller.External bearing pullers are used when the bearing is mounted onto a shaft. They have jaws which grip the outer diameter of the bearing, along with a forcing screw which pushes against the end of the shaft. As the forcing screw is tightened, the jaws force the bearing along the shaft.External bearing pullers can be either mechanical or hydraulically-assisted. Hydraulic bearing pullers require minimal manual effort, making them ideal for heavy-duty applications. However, specialist heavy-duty bearing pullers are also available for these applications.Internal bearing pullers are used where the bearing or component is fitted within a recess, with an opening in the inner diameter. The bearing puller is inserted into the inner diameter of the bearing where it grips the bearing. This can be through expansion or using claws. The bearing can then be pulled from the recess.Reversible bearing pullers are also available from manufacturers such as SKF. These bearing pullers are suitable for both internal and external pulling, thanks to their reversible arms. These bearing pullers are ideal for use in applications where there are bearings fitted both on shafts and in recesses.How to decide what type of bearing puller to useThe decision of which bearing puller to use is dependent on many factors. You’ll first need to establish whether you need an external or an internal bearing puller.If the component that you’re removing is seated on a shaft and is freely accessibly from the outer diameter, you’ll need an external bearing puller. This is the most common type of puller. However, if the part you’re trying to remove is in a recess with the inner diameter accessible, you’ll need an internal bearing puller.If you require an external bearing puller, you’ll then be able to choose between mechanical and hydraulic bearing pullers. If you’re on a tight budget, a mechanical bearing puller may be suitable. However, if you’re working with heavy-duty machinery, you might consider a hydraulically-assisted bearing puller to reduce the manual effort required.You’ll also need to consider the space conditions. This includes the diameter and depth of the bearing, along with the available space around the bearing. Some bearing pullers will require more space to operate than others.The choice of which bearing puller to use should always be made after careful consideration of all influencing factors. If you’re unsure which bearing puller to choose, it’s best to consult an expert before making your decision.