Unlike common mortise bits, these bits feature a special overlapping center carbide tip design which guarantees you a smooth and clean bottom cut every time. Ideal for cutting or cleaning out dadoes, cutting stair treads into risers, and putting stress relief on the back of moldings. Special ball bearing allows you to follow deep dado walls or use to follow templates. Great for making wood signs as well as removing paint or varnish.

Great bit for creating"stress relief" areas in backs of large and long trim moldings.
All bits two flute, carbide tipped. USA

NOTE: Item numbers ending with B are with bearing

#116-1105 features down shear cutting angle for undersized 3/4" plywood dado cuts.

(2 Customer Reviews)    Write your own review

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Product Rating:     Date Posted: 2008-01-08 00:00:00

Great bit for railings

Posted By: Bob Wagner

Location: Tampa, FL United States

Comments: I purchased the 1" diameter bit (116-1605) and use it for cutting a groove in custom railings I set on 3/8" x 1" steel bars. It works great on everything from pine to oak, and a couple of exotics my clients have requested. It's not quite up to the challenge of IPE, but I haven't found a bit that is. The groove is super clean and square and is ready to go right off of the router table, no additional work necessary.

Product Rating:     Date Posted: 2011-05-21 12:09:43

Slightly undersized

Posted By: Randy Schissler

Location: San Diego, CA United States

Comments: I'm reviewing the 23/32" bit (116-1105). While a great bit for giving flat bottoms and clean edges, the bit is a little undersized. With a digital caliper, I measured it to 45/64". This makes it too tight for 23/32" plywood dadoes. After routing, I have to sand or plane the sides of the dado, to make the plywood fit.

Router Saftey Chart - Suggested Speeds:

Bit Diameter	Max Speed
up to 1"	24000 RPM
1-1/16" to 2"	18000 RPM
2-1/16" to 2-1/2"	16000 RPM
2-9/16" to 3"	14500 RPM
over 3"	12000 RPM

Router Saftey Tips:

• Always wear eye and ear protection.
• Always use properly sharpened bits.
• Never use bits that are dull or damaged.
• Shank must be completely inserted into collet and then backed-off approximately 1/16".
• Don't "bottom-out" bit in collet.
• Never partially insert bit into collet. Tighten securely and recheck periodically for possible slippage or "run-out" due to wear.
• Keep collet clean and replace if worn.
• Never start the router with the bit in contact with wood.
• Always feed your work in the proper direction against the bit rotation.
• Don't force feed the bit or overload your router, Feed at a constant moving speed to avoid burning the wood.
• Do not face tool's discharge when operating.
• Always unplug router when changing bits or making adjustments.
• Use a router table and fence whenever possible.
• Make sure your work piece is properly secured and use push blocks, sticks and featherboards whenever possible.
• Keep all your bits, bearings and assemblies clean, lubricated, and securely fastened. To avoid damage, store them properly in a pouch, box or tray.
• The bigger the bit, the lower RPM recommended (see chart).