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 Pullers

The 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 Pullers

Mechanical 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 Pullers

These 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 puller

Two 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 mechanical

Hydraulic 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.

Reach

The 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 Jaws

The 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 Mechanism

The 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.

Spread

The spread is simply the diameter that the jaws extend to. Usually up to 25 inches

Tonnage

Pullers 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 Sets

Pullers 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.

How to find a right puller | DNT Auto Tools FAQ

How to find a right puller | DNT Auto Tools FAQ: How to find a right puller

-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

How To Test A Tool's Quality at the Hardware Store | DNT Auto Tools FAQ: 

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 Weight

When 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 Multitask

While 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 service

4. Know Your Steel

A 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 Comfort

A 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 Construction

For 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 Warranty

When 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. 

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MAN Front Wheel Hub Remover Installer|manufacturer|factory wholesale|customized|OEM|Truck Service Tools | DNT Auto Tools: Front Wheel Hub Remover Installer

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DNT Tools is a OEM Manufacturer in China,over 20 years, focus on kinds of automotive tools,puller,and tool sets.