Thursday, September 3, 2015

Proper Impact Wrench Lubrication

Water contamination and debris buildup are by far the biggest threats to your prized air impact wrench and other air tools. The common misconception is that if you regularly drain the air tank in your compressor, you are protecting your air tool from water damage, but this only prevents rust in the tank. 

Condensation in the air line and water contamination in your impact wrench can have terrible effects on the performance and life of the tool. The good news is that it doesn't take much time or effort to keep your impact wrench lubricated, and with regular maintenance you will be amazed how much more efficient the tool can be with a little proper T-L-C. 

The motor in your air tool has machine polished surfaces much like the cylinders in your car's engine. Water, dirt, rust and other contaminants quickly destroys these surfaces causing premature wear to your motor, reducing performance and the overall life of your air tool. Ingersoll Rand's own Lead Designer and Engineering Systems Administrator Ed Eardley recommends draining and purging your entire air system from the compressor to the tools weekly, as the first step to address wear and tear on your tool. 

Another easy solution is to never connect a worn or dirty hose coupler to your tool. Couplers are thrown around and dragged on the floor. Connecting couplers gummed up with brake dust, dirt, grease or saw dust is the easiest way to transfer these contaminants directly into your motor. Using an air hose real suspended from your shop ceiling will keep your hose and couplers off the floor and out of the muck. 

How often should you lubricate your impact wrench? Ingersoll Rand technical trainer Gary Potterpin has an answer for that: "Feed them like you feed yourself, once in the morning, once in the afternoon and once at night before you leave work," said Potterpin. "The lubrication at night helps prevent condensation, which causes rust." 

Also, in most modern motors there is a gap between the air rotor and the motor itself. In this case, Lubrication will not only reduce friction and prevent water condensation, it will also prevent air loss. 

Here are a few tips for keeping your impact wrench properly lubricated: 

• Lubricate the mechanism on both ends of the tool
o Most air tools have multiple grease fittings; if you aren't sure where they are, check your manual or ask your dealer

• Only use cleaners and grease that have been recommended by the manufacturer
o Check your manual for the recommended types of lubricant.
• Install and maintain an in-line combination Air Filter/ Lubricator / Regulator system. This system will efficiently clean and lubricate the air traveling through your air delivery system. (Note: this lubricator primarily lubricates your lines, fittings and hoses and is not a substitute for daily oiling of your air tools).
o For a vast majority do this once about every eight hours of use
• With composite impacts use a needle grease gun on the body of the tool. 

• Most aluminum bodied impacts feature a pressure feed lubrication system, with a fitting located on the back of the tool
o This is a mechanical system that forces oil from a separate reservoir into the crankcase to lubricate the internal components

• It is important that you lubricate your impact wrench at regular intervals 
• Clean and store your impact wrench after every use
o Keep your impact wrench in a dry, enclosed space while not in use
Sure it takes a little work to keep up a finely tuned machine, but it is an important step in keeping your tools running efficiently and keeping them free of water contamination. An impact wrench that has not been lubricated properly will operate with a lower power output, and if it is continually used when starved of grease, the internal components will wear down and the tool will not last nearly as long as it could. 

Effective maintenance of your air tools can prevent lockup and stalling, significantly increases tool life, maintain peak performance over the life of your tool. 

Think your impact wrench is starting to show its age? Try a lubrication regimen and see what happens, you might be surprised. Effective greasing in some cases can take tools that were previously thought to be worn down and not working, and make them work like new again. A little maintenance can go a long way.

- by Ingersoll Rand

Tuesday, July 7, 2015

How Accurate Are Impact Wrench Torque Ratings?

TORQUE. It’s the most crucial feature of the impact gun, yet it is also probably the most misinterpreted. At Ingersoll Rand, they’ve done extensive research and testing on torque therefore we thought we’d educate you on the findings. Exactly what do individuals torque rankings really mean?

Let’s settle this for good: generally, marketed “ultimate” or “bolt break away” torque is actually only a marketing ploy. Producers will test tools with techniques that permit them to boost the marketed torque rating, however these techniques don't yield a precise portrayal of real or “working” torque. Sure, you might have the ability to get 1000 foot-pounds of torque every now and then, however this is frequently not the real working torque the tool is continuously able to deliver.

We spoken with Ingersoll Rand’s Innovation Development Manager, Warren Seith, and he had this to state: “Ingersoll Rand has designed our air tools to obtain maximum torque without over-stretching the tool or even the user. We always advertise accurate torque because you want to be honest with this clients, so we shouldn't promote the common misconceptions of the what the items real torque is.”

Ingersoll Rand promotes three torque rankings for the tools: max reverse torque, “nut-busting” torque, and forward torque range. The max reverse torque is all the torque the tool has the capacity to deliver backwards. The max torque rating is made with different record analysis of the sampling of tools that have been examined in Ingersoll Rand’s lab on the Model M Skidmore tension tester having a high-strength 1-1/4” bolt. “Nut-busting” torque refers back to the tool’s capability to remove a bolt that's been stiffened lower using techniques apart from the tool itself. For that “nut-busting” torque, a bolt is stiffened having a torque wrench adjusted to 1100 foot-pounds, then removed using the tool being examined. Within this situation, the 2135TiMAX has the capacity to take away the bolt, therefore the marketed “nut-busting” torque is 1100 foot-pounds.

Since torque capacity is effected by many people variables like bolt size and type, thread conditions, air pressure, CFM, etc., an evaluation test can be challenging to have an consumer to duplicate. And also, since there’s presently no industry wide standard for testing or posting torque rankings it hard to check released torque rankings across producers.

So, what exactly are you searching for within an impact gun? As Warren stated, you need to take a look at real torque as it requires the roles that you simply do within the shop. The typical specialist thinks the marketed torque rating is definitely an accurate way of measuring torque, hence, utilizing a large number works well in selling tools, however it doesn’t always tell the entire story. We’ve found that what you'll get inside a lab isn’t always the actual way it works within the shop. Habits it is recommended that you attempt it before you purchase it.

Just a little advice towards the specialist: when evaluating producers make sure to request about torque rankings. Within the grand plan of products it doesn’t hurt to request if the maker has the capacity to answer you, then you're more informed when they cannot answer you, then you might like to take into account that before buying the tool. In the end, in the finish during the day what matters is if your impact wrench will get the task done each time. 

Monday, April 27, 2015

Choosing Between Impact Wrench Models

The difference between one impact wrench and another cannot and should not be judged by the price, but by the product quality, which regards, in particular, the raw materials, the impact mechanism and the weight/power ratio.

An impact mechanism which is properly designed and manufactured should have mechanically, thermally and chemically finished surfaces, to make it shock resistant, resistant to wear, tear and corrosion, thus granting long-term durability of the tool; moreover if the individual components have been manufactured with due attention, the noise and vibrations during operation will be considerably and noticeably reduced.

 On the other hand, a low weight/power ratio will make it possible to benefit of the needed torque with an inferior tool weight and this choice is an advantage above all for daily and continuous use in order to avoid overtiring the operator.

 The adjustment and control of the torque are further important aspects. If torque adjustment on the machine depends exclusively on the personal judgment of the opera-tor, on the contrary it is possible to control the torque by mean of torque sockets which are designed to transmit a precise and well defined torque above which the long and narrow waistline of the socket itself will absorb the excess torque of the impact wrenches in order not to damage the screw-nut/bolt joint.

 Last but not least, the quality and shape of the impact sockets is also important. Only high quality impact sockets with the correct angles and tolerances of the inner walls are able to transmit the nominal torque of the impact wrench properly and efficiently without damaging the tool itself.

Impact Mechanism Types and Applications 

 The 2-jaw system 
The 2-jaw system produces a single impact for eachcycle on both jaws and a high torque value. Thissystem also gives low vibration levels. It is presenton small tools and its use is suggested mainly for tightening hard joints.

The 3-jaw system 

The 3-jaw system produces a single impact for each cycle on all 3 jaws and a high torque value. This system also gives low vibration levels. This type is suggested mainly for tightening hard joints.

The twin-hammer system 

The twin-hammer system produces a double impact for each cycle on both sides of the shaft. The use of 2 oppositely positioned hammers allows any unbalances to be nullified and the vibrations to be absorbed: the result is a balanced impact. Recommended for fast tightening and suitable for elastic tightening.

Pin-clutch system

The pin-clutch system produces a single impact for each cycle. The strokes are made by two pins which are pitched directly on the shaft. This creates a balanced impulse and a lower vibration level compared to the previous systems. This system is very quick and has an excellent initial speed. It is extremely suitable for tire shops, to be used in combination with torque sockets.

- An Exerpt from the Dino Paoli 2014 General Catalog