Prazi Beam Cutter?

 
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Old 02-02-2010, 09:38 PM   #1
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Prazi Beam Cutter?


How bad is tear out with the chain? I imagine it isn't very pretty.
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Old 02-02-2010, 10:13 PM   #2
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Re: Prazi Beam Cutter?


Tim Uhler should have some info for you.

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Thanks for that tidbit of information Darcy.
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I don't normally talk to people like I talk to you, however you have the little immature schoolgirl mentality so this is new to me.
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Old 02-02-2010, 11:03 PM   #3
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Re: Prazi Beam Cutter?


Josh (IHI) has one he uses for cutting stair stringers at the same time. He had a chipout problem but I thought he might has solved it. PM him.
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Old 02-05-2010, 06:15 PM   #4
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Re: Prazi Beam Cutter?


I build log homes and it has already saved me alot of time ripping logs for windows etc.. The cut is relatively square and not too messy. It does chop about a 1/4" wide path and will easily cut 5" deep and stay square. If it were used on any materials that would be visible - you would have alot of clean up to do to the lumber.
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Old 02-05-2010, 06:55 PM   #5
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Re: Prazi Beam Cutter?


The tearout sucks.

I found that it was very difficult to achieve the precision I needed to hold for framing deck stairs with it because there was just too much drift in the cut for my liking. It excels at notching 6x6s and such, but the tearout is an issue unless you put a sacrificial piece of lumber on top.
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Old 02-05-2010, 07:06 PM   #6
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Re: Prazi Beam Cutter?


Thanks fellas, looks like I will be looking elsewhere.
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Old 02-05-2010, 07:40 PM   #7
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Re: Prazi Beam Cutter?


3"x9" hemlock timbers....with a cutting jig you can get pretty close....I haven't tried, but I'm guessing tear out would be less if you score your cut first.

Prazi Beam Cutter?-sponaugle.3-008.jpg

Prazi Beam Cutter?-sponaugle.3-010.jpg
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Old 02-05-2010, 07:44 PM   #8
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Re: Prazi Beam Cutter?


That's what I was thinking, but I would hate to spend the money on the saw and not get a clean enough cut for my liking. I already have enough tools and I just don't need to buy another toy that I will not use.

If anyone who has a prazi beam cutter and is willing to scribe the cut and then make a cut on cedar with it, please post your results.
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Old 02-05-2010, 07:56 PM   #9
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Re: Prazi Beam Cutter?


Cole, I use mine for ALL sorts of stuff now, awesome tool to have in yoru arsenal.

I cut upto 6 stringers clean vs having to go back and sawzall or jigsaw the inside corners

Old construct stringers i use it to "whittle down" high spots across multiple stringers so treads sit flush all the way across without having to remove them

Old homes where rough opening height is 1/2"-1" too low I'll chip the plaster up and out of the way and then make one clean pass to notch 90% of the header outta the way

Cutting 6x6 posts, notching beam insets in 4x6/6x6 posts in one clean pass with no clean up passes/chiseling

Leveling out chiseled out floor joists in older homes when we remove the old sills and are installing new treated flat sills....you know how wavey and inconsistant they were...old chisel happy and "close enough" does'nt work when trying to install a new perfectly flat sill.

The severe chip out was always on the up stroke of the chain. Treated lumber there's hardly any chip out at all, works great for this.

Hard douglas fir, there's hardly any chip out, but you will get some. Softer construction lumber there's terrible chip out. I will link some pictures to show what i mean. I did learn when i cut a stack of stringer all at once (mainly to account for all the various widths of 2x12 stock) I screw/nail/tack them together as i stack them to prevent any movement while cutting/moving the stack. Then for the softer lumber I will mount a "sacrifical board" like a 1x10/1x12. So long as there's pressure on the stack of lumber getting cut, the only board that will chip out is the top board since it's not compressed grains so there's nothing to stop it from chipping out...this is the key as is a SHARP chain!!!! you hit ANY metal, switch chains as it will be impossible to cut straight from that point on no matter how strong you think you are...it will wander on it's own. I keep 3 chains on stand by that are always sharp and ready, then drop off the damaged chain to get redone. I have'nt yet experimented with different pitch on the teeth to see if they could be laid over and reduce chip out, or if cutting the raker down lower would reduce chip out with no top compression board.

Either way I love it, great tool to have in the arsenal...it's not used alot alot like a skill saw, but now that i have it, i create uses...it really is a great conversation starter and gives everybody in the trades who've never seen them in person a "wow" factor They're also great at cutting cords if your not paying attention...12" of sharp cutting chain hanging down.....it tends to catch the cord if your not paying attention..i know

Saw in question-standard Skil Mag with Prazil attachment


Cutting 4 stringers at once with NO top compression board:


This is what happens on softer construction lumber with no top compression board...the top board ALWAYS chips out, the boards underneath do not. Luckily in this case (one of my first trials) these stringer were all going to be completely enclosed/out of ALL sight, so i buried the top one far back until it got covered up, so was'nt really a loss, just a good ole experiment.
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Old 02-05-2010, 07:56 PM   #10
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Re: Prazi Beam Cutter?


Problem esspecially with treated lumber- NOTHING is uniform and it tends to warp/cup badly as you cut out the steps since it creates a "relief" and each stringer will cut differently, so i cut them all together and it keeps them closer since they're all screwed together. Chip out on treated stringers is minimal, I can go back with a sharp utility knife and trim the "burrs" off and they look great since it creates a bevel/chamfer on the edge. OR on the jobs that have a better budget, we make skirt boards to cover the stringers so this little bevel section will never been seen anyhow.



Notching beams is a piece of cake- 2 passes, clean cut, DONE.


Finished set of treated stringers, as you can see, just as sexy with the prazi once you figure it out as any other way of cutting them..best part-equally uniform.
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Old 02-05-2010, 07:59 PM   #11
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Re: Prazi Beam Cutter?


Quote:
Originally Posted by Cole View Post
That's what I was thinking, but I would hate to spend the money on the saw and not get a clean enough cut for my liking. I already have enough tools and I just don't need to buy another toy that I will not use.

If anyone who has a prazi beam cutter and is willing to scribe the cut and then make a cut on cedar with it, please post your results.
Scribing will NOT help much. I tried light scribing, i tried HEAVY/DEEP scribing, cutting on the scribe, cutting outside the scribe. Masking tape, nothing will preven the chip out on soft lumber unless you can find a way to compress a sacrifical board on top...the compression is the key, it does not allow the grain to pull up since it's packed down tightly.
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Old 02-05-2010, 08:27 PM   #12
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Re: Prazi Beam Cutter?


You could make a 0 clearance plate for it to ride on. Lose 1/2" or less of depth but, you should have a fairly nice finished cut.
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Thanks for that tidbit of information Darcy.
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I don't normally talk to people like I talk to you, however you have the little immature schoolgirl mentality so this is new to me.
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Old 02-05-2010, 08:36 PM   #13
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Re: Prazi Beam Cutter?


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You could make a 0 clearance plate for it to ride on. Lose 1/2" or less of depth but, you should have a fairly nice finished cut.
Sorry, my jig isn't green
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Old 02-05-2010, 09:08 PM   #14
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Re: Prazi Beam Cutter?


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Sorry, my jig isn't green
Not a jig, an actual plate to fasten to the saw table.
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Thanks for that tidbit of information Darcy.
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I don't normally talk to people like I talk to you, however you have the little immature schoolgirl mentality so this is new to me.
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Old 02-05-2010, 10:13 PM   #15
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Re: Prazi Beam Cutter?


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Not a jig, an actual plate to fasten to the saw table.
I guess I have to refer to IHI...how do you keep your cuts straight? Do you freehand or use a straight edge?
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Old 02-05-2010, 10:21 PM   #16
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Re: Prazi Beam Cutter?


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Originally Posted by WarnerConstInc. View Post
You could make a 0 clearance plate for it to ride on. Lose 1/2" or less of depth but, you should have a fairly nice finished cut.
Interesting, you may be onto something.
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Old 02-05-2010, 10:24 PM   #17
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Re: Prazi Beam Cutter?


You can still run it against a guide. Make the plate the
same size as the table. I would use a polycarbonate plate
for the 0 clearance. I know, a lot of thought for a chain saw!!
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Thanks for that tidbit of information Darcy.
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I don't normally talk to people like I talk to you, however you have the little immature schoolgirl mentality so this is new to me.
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Old 02-05-2010, 10:28 PM   #18
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Re: Prazi Beam Cutter?


I am amazed at the results from a simple splinter guard
on all kinds of saws. Just like making a throat plate for your
table saw or miter saw.
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Thanks for that tidbit of information Darcy.
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I don't normally talk to people like I talk to you, however you have the little immature schoolgirl mentality so this is new to me.
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Old 02-05-2010, 10:28 PM   #19
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Re: Prazi Beam Cutter?


No such thing as to much thought for a chainsaw. If used right there pretty precise
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Old 02-05-2010, 10:31 PM   #20
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Re: Prazi Beam Cutter?


Quote:
Originally Posted by WarnerConstInc. View Post
You can still run it against a guide. Make the plate the
same size as the table. I would use a polycarbonate plate
for the 0 clearance. I know, a lot of thought for a chain saw!!
That's what I was thinking, definitely no bigger the the saw table.

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