Replies

1. 
   JohnWW | Oct 20, 2004 08:08pm | #1

   The speed control, by itself, isn't a problem, but the router is probably undersized for the bit you are trying to run, and you risk overloading and damaging the machine.  The speed control may make this more likely, since it will cut the efficiency of the motor somewhat, but the basic problem would be the size of the router. 

   What make, size, and type of bit are you trying to run and what model B&D router are you using?

   John W. 

1. 
   donnybongo | Oct 21, 2004 12:35am | #3

   Using Freud 1/4 inch raised panel bit set.  Black and Decker 1 3/4 hp plunge router.

2. 
   Pondfish | Oct 20, 2004 11:28pm | #2

   I use a similar controller all the time for my router table: full power for most bits, less for large diameter bits.  I've never had a problem, using a 2.5hp Ryobi router.

3. 
   hammer1 | Oct 21, 2004 01:29am | #4

   We raised panels on much smaller single speed routers for years before there were so many router options out there. I've never found that slower speeds were better for large bits. Quite the opposite and I run some big bits. Do you slow down your table saw when you run dadoes? The trick is to take incremental cuts so you don't strain the tool or the stock. Smaller routers need smaller passes. Save your money for a Speedmatic.

   Beat it to fit / Paint it to match

1. 
   BArnold | Oct 21, 2004 06:58pm | #5

   "I've never found that slower speeds were better for large bits. Quite the opposite..."

   Well, even the manufacturers recommend slower speeds for larger bits as a safety factor.  Amana: http://www.amanatool.com/bits/54227.html

   Read the advice of experienced, safety-minded folks here on the Forum.  Previous threads have dealt with safety factors: 9882.1  12988.1  19377.1 

   Regards,Bill Arnold - Custom Woodcrafting

   Food for Thought: The Ark was built by amateurs; the Titanic by professionals.

4. 
   BArnold | Oct 21, 2004 11:08pm | #6

   Donny,

   Follow the safety recommendations of the bit manufacturers and reduce the speed of the router for larger bits.

   Read the advice of experienced, safety-minded folks here on the Forum.  Previous threads have dealt with safety factors: 9882.1  12988.1  19377.1 

   Here's an excerpt from a web page dealing with this issue:

   ---

   Router Speeds

   The larger the diameter of the cutter the faster the tips of it travel, a large bit will be travelling too fast for optium performance and safety on a router at full speed unless the RPM is slowed. If your router does not have a speed control you can use an external attachment.

   Suggested Speeds 0 - 1 inch in dia - 22,000 RPM 1 - 2 inch in dia. - 18,000 RPM 2 - 2.5 inch in dia. - 16,000 RPM 2.5 - 3.5 inch in dia. - 12,000 RPM At 22,000 RPM the tips of a 3/4" bit travel at 49 MPH, on a 3 1/2" bit they would be travelling over 220 MPH.

   ---

   Of course, one way to play the game is to use speed control to justify a new router.  For instance, I have a Bosch 2.25hp router in my table; underpowered according to some people, but I've done a lot of panel-raising with it just like a lot of other folks have.

   Regards,

   Bill Arnold - Custom Woodcrafting

   Food for Thought: The Ark was built by amateurs; the Titanic by professionals.

   ---

   
   

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   Edited 10/21/2004 4:11 pm ET by BArnold

1. 
   donnybongo | Oct 22, 2004 02:39am | #7

   I think I will follow the safety directions you gave and slow it down.  I know it can be a strain on the bit if passing it through too fast and I know all the professionals , including Norm say to slow it down.  Thanks.