Old dado blade set - Woodworking Talk - Woodworkers Forum
 
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post #1 of 15 Old 11-08-2013, 10:52 AM Thread Starter
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Old dado blade set

I have been thinking about trying some box joints and I have no experience with dado blades. First is this safe to run? I have no writing on it. I would guess its a power kraft or something similar just because I got this and a old saw (powerkraft)from a family friend unloading his basement of his dads old stuff.
Anybody seen one like this?
Also-do I need to make a insert for my table saw before using or not? My wood should be long enough to clear the insert area.
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post #2 of 15 Old 11-08-2013, 11:00 AM
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I seriously doubt you will get a satisfactory cut with that set.
When I do box joints, I use a dedicated jig/sled which eliminates the need for an insert.

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post #3 of 15 Old 11-08-2013, 11:19 AM
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Quote:
Originally Posted by Dandan111 View Post
I have been thinking about trying some box joints and I have no experience with dado blades. First is this safe to run? I have no writing on it. I would guess its a power kraft or something similar just because I got this and a old saw (powerkraft)from a family friend unloading his basement of his dads old stuff.
Anybody seen one like this?
Also-do I need to make a insert for my table saw before using or not? My wood should be long enough to clear the insert area.
Untitled by [email protected], on Flickr
I agree with mdntrdr, it looks like it would be difficult to get a good looking box joint with that set. Remember that box joints are visible and a ragged bottom of the cut will show up. I looks like it would make a serviceable dado though as long as the ends of the dado are hidden.
Yes, you should use an insert sized as closely as possible to the width of the dado for safety. Sounds like mdntrdr has made a purpose built sled to eliminate the need but the aspect needs to be addressed one way or another.

John

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post #4 of 15 Old 11-08-2013, 12:04 PM Thread Starter
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You guys think it will my cuts will be rough with no carbide? As long as it's safe I'll try it.
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post #5 of 15 Old 11-08-2013, 12:18 PM
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Originally Posted by Dandan111 View Post
You guys think it will my cuts will be rough with no carbide? As long as it's safe I'll try it.
No one mentioned carbide. It is the design of the cutters, and few teeth which may result in a rough cut surface which can result in problems fitting the box joints together.
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post #6 of 15 Old 11-08-2013, 12:27 PM
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That looks like scrap metal to me. Amazon has a pretty good http://www.amazon.com/Avenger-AV-69930-Stack-6-inch-8-inch/dp/B0001AGFXU/ref=sr_1_1?ie=UTF8&qid=1383931621&sr=8-1&keywords=avenger+dadot on sale for < $57 shipped.
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post #7 of 15 Old 11-08-2013, 12:29 PM Thread Starter
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^Yes, I'm new to this but it's a strange design set in my eyes. I didn't remember what it looked like so I got it out today. I was hoping to see a name on it somewhere. The side blades are different than I have seen.
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post #8 of 15 Old 11-08-2013, 12:45 PM
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It looks like an old set that never caught on. That's probably why you've never seen anything like it. As long as nothing flies off, chuck it up, stand to the side and give the power switch a quick on/off flip. If it wobbles, throw it away. If not, see how it cuts.
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post #9 of 15 Old 11-10-2013, 05:14 PM Thread Starter
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I had time for a quick test today. Everything seemed fine and safe so I gave it a try. Just the right size for the small saw I have but I'm not sure about box joints quality yet. I just had a old 2 by 4 close by. What do you guys think? To rough?



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post #10 of 15 Old 11-10-2013, 05:56 PM
where's my table saw?
 
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a lousy dado set used on crummy wood ....

Will give you what you got there. That wood is not helping, the HHS cutters probably have seen better days and the result is tear out.
Probably Ok for construction work, not woodworking. JMO.

Safety is probably not an issue if the work is held securely against the miter gauge or the fence on a radial arm saw. Me, I would not use it and get a new one as suggested by knotscott above.

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
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post #11 of 15 Old 11-10-2013, 06:48 PM
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That's a lot of tearout.....even a modest $60 set will do much, much better.

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post #12 of 15 Old 11-10-2013, 07:15 PM Thread Starter
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I tried a piece of oak. Still tearout but not near as bad.
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post #13 of 15 Old 12-20-2013, 11:40 PM Thread Starter
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I made a table insert and have been testing. My dado blade sucks. Do you guys think my leeson 3/4 hp would be enough for the avenger set? I'm real close to buying it. My motor powers this dull dado blade so I think it should handle the sharp avenger set fine?
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post #14 of 15 Old 12-20-2013, 11:51 PM
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Can't tell which end of your saw is the infeed end, hopefully it's towards the drill at the top of the picture. When you set up a dado set, the chippers with only two teeth go in between the outside cutters. On steel dadoes, there can be a left and right outside cutters. Looks like you have the outside cutters in the center.
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post #15 of 15 Old 12-21-2013, 12:03 AM Thread Starter
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I think I have it right? First picture shows the blade/strange shape. I put the chipper blades in the middle. That drill is on the infeed side. I will take another look.
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