Universal Motor Mounts

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Universal Motor Mounts
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A ride in your Mercedes Benz should be a comfortable one, with the slightest feel of movement possible. However, with a broken vehicle mount, this would be absolutely impossible.

In your vehicle, there are actually several kinds of mounts namely: the engine, transmission, body-to frame, drive shaft supports and strut mounts. Basically, these mounts have three functions. One is to serve as an attachment point for a part to the chassis, another is to serve as an isolator to keep noise or vibration from being transmitted throughout the car, and lastly, to act as an adjustment point to keep a component in proper alignment.

The Mercedes transmission mount, in particular, forms the rear support of the engine/transmission assembly, and provides the correct operating angle for the front of the drive shaft. Aside from this, it has the vital function of reducing torque and vibration in the drive line, and minimizing the vibration transmitted to the chassis, along with the engine mount.

The Mercedes transmission mount, just like other mounts are mostly made of either rubber or steel. Due to this, factors such as usage, automotive chemicals such as oil and other contaminants can lead to its deterioration and failure.

When the Mercedes transmission fails, the amount of stress upon the engine mount will eventually increase. This will lead to the failure of the engine mount as well. Moreover, there is a huge tendency that a failed transmission mount could lead to accelerated wear or failing of the universal joins. If this happens, costly repairs will be needed.

Several types of transmission mounts are found in the market but remember that certain types may not exactly work for your vehicle. The race-type mounts can stabilize the transmission too much that you can feel every bit of vibration in your car. Other after-market mounts are designed to make mounts even stiffer. It is careful to choose the kind that can decrease unwanted transmission movement while efficiently controlling the amount of vibration.

There are several ways in which you can determine that your Mercedes transmission mount is failing. The presence of hydraulic fluid in your transmission mount, it may be a sign that it is already failing. Abnormal noises like a knocking sound and excessive engine movement can also be indicators.

It is therefore important to replace your Mercedes transmission mount once it fails. Delaying it can just cause you more serious and more costly damage repairs.

For more about your Mercedes parts needs like Mercedes transmission mount, visit your trusted online source.

Dwyane Thomas is a part time cook and full-time auto-enthusiast. This 31-year old Civil and Environmental graduate is a consultant at one of the engineering firms in Pennsylvania.

Understanding Induction vs. Universal Motors in Your Electric Power Tools

As a woodworker you've likely not given much thought regarding the two primary types of motors used to power your electric woodworking tools. The differences in performance - and the number of zeros on a price tag - should have your attention.

As in all considerations regarding power tools your ultimate decision should be based on your projected USAGE. If you're a newbie just getting started then it might not be time to invest in the cast iron induction-powered table saw. If you're running a professional shop then all six of your table saws probably have induction motors.

Your duty to yourself as a consumer is to make educated decisions. In that interest here are some of the differences between induction and universal motors... without getting too technical and without taking a "one motor is better in all situations" stance.

1) Size and Weight
Induction motors are typically heavier than universal motors, making them ideal candidates for stationary tools that need the extra weight anyways to reduce rattling and improve stability. Obviously at their weight and size they make poor candidates for hand held or portable tools.

That's where universal motors come in to play. Their smaller size and weight make them ideal for circular saws, bench top planers and your shop vacuum.

2) Cost
Induction motors are more expensive and found often these days in the top of the line electric power tools. They're made with more copper, aluminum and steel than universal motors. Universal motors are less expensive and found in just bout every electric power tool known to man.

3) Speed
Induction motors typically have a slower max speed. Universal motors are only limited by friction.

4) Torque at Start Up
Induction motors have less torque at start up - think of them as "high gear" on your car or bicycle. Once they're at cruising speed they're good to go, but typically don't much like to be stopped and started frequently. Universal motors typically have great torque at start up that get blades chewing through tough spots. They can cruise too but that leads us to...

5) Longevity
Induction motors are long-lived. There are stories of woodworkers using induction motor powered tools passed on by their grandfathers. Universal motors are more likely to burn out in a shorter period of time. There are stories of universal motors lasting for 20 years and more, but as a very general rule universal motors don't last as long as induction motors.

6) Noise
Induction motors are quieter - far far far quieter - than universal motors. Universal motors are widely known for their shriek and many residential areas have bans on their usage after a certain time of day. (Note: you should wear hearing protection while using either one...)

7) Standardization
Induction motors have been standardized by NEMA. This means that it's easy to replace induction motors in your machines with standard motors from different manufacturers due to standard frames, shaft sizes, mounting dimensions and more. Universal motors are typically characterized by their LACK of standardization, which can sometimes makes replacement difficult.

Energy Efficiency
Induction motors are highly efficient motors that require less amperage per horse power. Universal motors require more amperage per horse power than induction motors. All this extra energy requirement turns into heat in the motor which will sometimes burn them out - literally - if used for extended periods of time.

9) Application: Your Final Decider
Ultimately whether you purchase a tool where there's actually a choice between induction and universal (table saws and planers for example) you will have to ask yourself how often you'll be using the tool and your likelihood of continuing with your hobby.

Your induction motor tools will have a higher resale value if you bail out of woodworking, but will cost you more in the upfront. Your universal motor power tools will have less of a resale value but cost less upfront.

If you walk into your hardware store with a basic understanding of the two major types of electric motors along with a firm idea of what your woodworking projects will be for the next few years you're going to walk away with the right tool for you. And that's the most any woodworker can ask for.

About the Author

Garrett French is the Editor for ToolCrib.com.

At www.ToolCrib.com you can find and compare tools, catch up on the latest topics and debates at the power tool blog and save tons of money on power tools by subscribing via rss or email to our power tool deal of the day.

My Ford truck smoothly goes into drive but makes a hard jolt when putting in reverse?

I have checked all the motor and transmission mounts and universal joints and can find no problems there. What else might cause this? Thank you.
It has a V6 w/ automatic & a swing-bearing drive shalf.

You don't tell us what year or model, BUT
Wear in the drive train and excessive idle both can contribute to this jarring thump.
The reason for this is somewhat mechanically technical, but because we don't use R all that much (in comparison to D) there are fewer clutches for Reverse than for Drive. So to be sure to fully engage and not slip, the transmission doubles the line pressure to these clutches so that they are as secure as possible. When they do engage, sometimes, if the idle is higher than normal, or if the transmission oil is due (or overdue) for a change, this is one of the signs.
Also check out that center support bearing and its insulator as well.
Finally, check to see that there is plenty of oil in the differential. If it is low, there won't be any oil to cushion the shock of the pinion mating up to the back side of the ring gear.

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