Woodworker's Journal 2009-33-6, страница 16

Anti-kickback design features aid safety in both large and small diameter router bits, but remember, no routing task is without inherent danger.

Questions & Answers

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Good Bits about Router Bits

THIS ISSUE'S EXPERTS

tool, part availability will be hit or miss. I have a 30-year-old Stanley router that suffers from the same problem. In the absence of replacement parts, I drilled out the lock-system housing and replaced it with a 3/16" carriage bolt and a couple of nuts. It's ugly and annoying to use, but it works.

—Rob Johnstone

QIs the anti-kickback feature of router bits only important for large bits over V/2" in diameter and less of a factor for smaller bits?

Stan Frinak Farmington Hills, Michigan

A At Freud, we are convinced that kickback-reducing router bit design is a critical safety feature. The concept of our design is fairly straightforward: the body of the bit restricts the "bite" of the cutting edge to 1.1mm per revolution. Although no design can completely eliminate the chance of kickback, our design dramatically reduces the possibility and the effects of such an occurrence. The importance of kickback-reducing design may be greater with large-diameter bits, but it is possible for dangerous kickback to occur

Rob Johnstone is editor in chief of Woodworker's Journal.

Cliff Paddock is director of product development (cutting tools) for Freud America, Inc.

Chris Marshall is

field editor 0/Woodworker's Journal and author of several books on woodworking.

Contact us by writing to "Q&A," Woodworker's Journal, 4365 Willow Drive, Medina, MN 55340, by faxing us at (763) 478-8396 or by emailing us at: QandA@woodworkersjournal.com Please include your home address, phone number and email address (if you have one) with your question.

QMy Craftsman router served me well for 20 years, until I began using it upside-down (of course) in a router table. It seems that the clamping action of the base against the motor housing just isn't strong enough to hold the bit at the right elevation against both gravity and vibration. When I turn it on, it vibrates downward about 1/16" to 1/8". No matter how-hard I crank down on the thumbscrew clamp or how well I clean the mechanism, it just won't stay set.

Is this a recognized problem with the Craftsman design, or am I missing something?

Daryl Boggs Fort Collins, Colorado

Alt sounds to me like your router is getting a bit flimsy in its old age. It's likely that the timing of die problem — that your router base's locking system is failing — is more coincident with your router table use than causative. You may be able to replace the thumbscrew clamp or even the whole base, locking system included, and fix the problem. With a 20-year-old

Our editor's low-tech solution to an out-of-stock part.

RECALL NOTICES!

A recall is in effect involving model numbers D51825 and D51850 DEWALT Framing Nailers with date codes 20080249 through 20082749. The nailer can eject a fastener unexpectedly and the trigger lock-off may not function properly. For more information, visit www.DEWALT.com or call 877-437-7181.

A recall is also in effect involving the following Heat Gun models: Milwaukee MHT3300, ACE HT3500 and Wagner HT3500. Heat Guns continue to produce heat after the power switch is turned off. For more information, visit www.wagnerspraytech.com or call 888-925-6244.

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16 December 2009 Woodworker's Journal