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mftha · 09-11-2006, 10:56 PM

I was recently disappointed to learn that all straight bits cannot be used for plunge cutting. I have now looked closely at my straight bit collection and find that only the spiral trim upcut and the straight bits specifically designated as plunge cut bits can be used in that way.

**bobj3** · 09-11-2006, 11:23 PM

Hi mftha

Yes and NO, if you move the router forward just a bit they will plunge in but they will not just drop in straight in.

but you can move the router back a bit and and cut it one more time but you must use care when you move it back because the bit will want to pull you away from the 1st cut.

Bj

**Mike** · 09-11-2006, 11:42 PM

MFTHA this is an excellent point. When purchasing any bit consider if it will need to be used in the plunge mode. Plunge bits are a better value as a rule since they do both jobs. A plunge bit with a template and guide bushing will often do the same job as a bearing guided bit.

RustyW · 09-16-2006, 04:32 AM

mftha,

Whenever I need to plunge a straight bit,for example in a dado that stops short of both ends of the workpiece. I drill a starter hole with a spade or forstner bit. The bit does not need to be the same diameter as the router bit, but large enough to span the gap between the 2 pieces of carbide. Hope this helps.

Rusty

09-11-2006, 10:56 PM	#1
mftha Registered User Forum Fanatic Join Date: May 2006 Location: West Central Illinois Posts: 156 View mftha's Gallery	Report This Post! straight bits I was recently disappointed to learn that all straight bits cannot be used for plunge cutting. I have now looked closely at my straight bit collection and find that only the spiral trim upcut and the straight bits specifically designated as plunge cut bits can be used in that way.
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09-11-2006, 11:23 PM	#2
bobj3 Forum Contributer Supreme Forum King Join Date: Jan 2006 Location: Littleton,Colorado U.S.A. Posts: 7,529 View bobj3's Gallery	Report This Post! Hi mftha Yes and NO, if you move the router forward just a bit they will plunge in but they will not just drop in straight in. but you can move the router back a bit and and cut it one more time but you must use care when you move it back because the bit will want to pull you away from the 1st cut. Bj __________________ Bj
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09-11-2006, 11:42 PM	#3
Mike Senior Moderator Supreme Forum King Join Date: Nov 2004 Location: Detroit, Michigan USA Posts: 3,168 View Mike's Gallery	Report This Post! MFTHA this is an excellent point. When purchasing any bit consider if it will need to be used in the plunge mode. Plunge bits are a better value as a rule since they do both jobs. A plunge bit with a template and guide bushing will often do the same job as a bearing guided bit. __________________ Mike
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09-16-2006, 04:32 AM	#4
RustyW Registered User Forum Geek Join Date: Dec 2005 Location: Oroville CA, USA Posts: 300 View RustyW's Gallery	Report This Post! mftha, Whenever I need to plunge a straight bit,for example in a dado that stops short of both ends of the workpiece. I drill a starter hole with a spade or forstner bit. The bit does not need to be the same diameter as the router bit, but large enough to span the gap between the 2 pieces of carbide. Hope this helps. Rusty
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