DM 2610005595
the type of accessory being used. These charts enable you to select both the correct accessory and the optimum speed at a glance.
The speed of Rotary Tool is controlled by setting this dial on the housing.
Settings for Approximate Revolutions.
Switch Setting | Speed Range |
|
|
5
*10 | |
15 | |
20 | |
25 | |
30 |
35
* Wire Brush Setting.
Needs for Slower Speeds
Certain materials, however, (some plastics and precious metals, for example) require a relatively slow speed because at high speed the friction of the accessory generates heat and may cause damage to the material.
Slow speeds (15,000 RPM or less) usually are best for polishing operations employing the felt polishing accessories. They may also be best for working on delicate projects as “eggery” work, delicate wood carving and fragile model parts. (All brushing applications require lower speeds to avoid wire discharge from the holder.)
Higher speeds are better for carving, cutting, routing, shaping, cutting dadoes or rabbets in wood.
Hardwoods, metals and glass require high speed operation, and drilling should also be done at high speeds.
The point to remember is this: Many applications and accessories in our line will provide the best performance at full speed, but for certain materials, applications, and accessories, you need slower speeds, which is the reason our variable speed models are available.
To aid you in determining the optimum operational speed for different materials and different accessories, we have constructed a series of tables that appear on page 17, 18, 19 and 20. By referring to these tables, you can discover the recommended speeds for each type of accessory. Look these tables over and become familiar with them.
Ultimately, the best way to determine the correct speed for work on any material is to practice for a few minutes on a piece of scrap, even after referring to the chart. You can quickly learn that a slower or faster speed is more effective just by observing what happens as you make a pass or two at different speeds. When working with plastic, for example, start at a slow rate of speed and increase the speed until you observe that the plastic is melting at the point of contact. Then reduce the speed slightly to get the optimum working speed.
Some rules of thumb in regard to speed:
1.Plastic and other materials that melt at low temperatures should be cut at low speeds.
2.Polishing, buffing and cleaning with any type of bristle brush must be done at speeds not greater than 15,000 RPM to prevent damage to the brush.
3.Wood should be cut at high speed.
4.Iron or steel should be cut at high speed. If a high speed steel cutter starts to chatter — this normally means it is running too slow.
5.Aluminum, copper alloys, lead alloys, zinc alloys and tin may be cut at various speeds, depending on the type of cutting being done. Use paraffin or other suitable lubricant on the cutter to prevent the cut material from adhering to the cutter teeth.
Increasing the pressure on the tool is not the answer when it is not performing as you think it should. Perhaps you should be using a different accessory, and perhaps an adjustment in speed would solve the problem. Leaning on the tool does not help.
Let speed do the work!
Use only Dremel®, high-performance accessories.
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