Author Topic: Building a model Drag Saw  (Read 13815 times)

Offline crueby

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Re: Building a model Drag Saw
« Reply #120 on: September 17, 2018, 10:00:09 PM »
That tooth profile looks much more like a log saw, should work much better.

Offline AlexS

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Re: Building a model Drag Saw
« Reply #121 on: September 17, 2018, 10:09:11 PM »
Nice job!  :ThumbsUp: Cut the log quite smooth.

Offline Bobsmodels

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Re: Building a model Drag Saw
« Reply #122 on: September 17, 2018, 11:32:02 PM »
Brian

Really looking good, nice cut.   Do not get rid of the slow cutting saw. As I mentioned in another thread my friend Jim ran one of these at shows. He would have it running for days at a time.  Would run out of logs, and continually moving the saw and locking it got to be a bit of a pain.  Now it was fun to watch it cut off a log but after three or four days at a show it became work.  The solution was a dull blade so all the action was there and everyone could see it cut away. He used a band saw at home to cut lots of cutoffs ( to give to the spectators).  He would lay four or five around the end of the log. When someone wanted one he gave it to them.  Running all day maybe only cut 3 or 4 actual pieces.  More fun less work, could spend time answering endless number of questions about the models.

So from experience, keep that slow blade.

Bob

Offline Brian Rupnow

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Re: Building a model Drag Saw
« Reply #123 on: September 17, 2018, 11:57:54 PM »
Bob--You're giving advice on keeping things to a man that never throws anything away. If the new blade cuts better, the old blade will hang on a nail in my garage into the next millennium. :Lol: :Lol: I've enjoyed this build, and it has went relatively quickly.---Brian

Offline Johnmcc69

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Re: Building a model Drag Saw
« Reply #124 on: September 18, 2018, 12:45:41 AM »
Works a treat! Congratulations Brian!

 Great work,

 John

Offline b.lindsey

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Re: Building a model Drag Saw
« Reply #125 on: September 18, 2018, 01:36:35 AM »
Very nice Brian. Will be interesting to see what the more agressive blade does. Great project!!

Bill

Offline fumopuc

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Re: Building a model Drag Saw
« Reply #126 on: September 18, 2018, 07:29:54 PM »
Hi Brian, nice project and congratulations for the first cuts.
Kind Regards
Achim

Offline Brian Rupnow

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Re: Building a model Drag Saw
« Reply #127 on: September 18, 2018, 08:24:08 PM »
I installed the new saw blade, drilled a few cosmetic holes in the dog clutch handle, and put a very weak tension spring on the dog clutch handle to keep it disengaged. When it is engaged and the saw is moving, it seems to stay engaged without much of a problem, although I can disengage it quite easily by moving the lever. Even with the new aggressive sawblade, this thing is no speed demon at getting thru a log.  When you've been used to chainsaws all your life, this thing cuts pretty damned slow by comparison, but 100 years ago it certainly would have seemed like a marvel to two men on a manual crosscut saw. The batteries for my camera are charging right now, so I might get the final video up before the day is over.

Offline Brian Rupnow

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Re: Building a model Drag Saw
« Reply #128 on: September 19, 2018, 05:48:46 PM »
This will be my final video of the drag saw, and I am deeming it a success. It cuts logs the way it is supposed to, and the engine has ample power.
<a href="https://www.youtube.com/watch?v=l3ypmkh12M4" target="_blank">http://www.youtube.com/watch?v=l3ypmkh12M4</a>

Offline sbwhart

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Re: Building a model Drag Saw
« Reply #129 on: September 19, 2018, 05:55:15 PM »
Good interesting project Brian with a successful ending  :ThumbsUp:

Stew
A little bit of clearance never got in the way

Offline crueby

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Re: Building a model Drag Saw
« Reply #130 on: September 19, 2018, 06:00:34 PM »
Excellent!!

Offline zeeprogrammer

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Re: Building a model Drag Saw
« Reply #131 on: September 19, 2018, 07:43:54 PM »
 :ThumbsUp: Nicely done Brian!
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline Brian Rupnow

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Re: Building a model Drag Saw
« Reply #132 on: September 19, 2018, 08:05:28 PM »
Thank you guys. So--an interesting comparison. In the first video, using a newly sharpened carpenters saw, the saw took 7.2 minutes to cut thru the log. In the last video, with a much coarser style of saw profile, the saw took 3.2 minutes to cut thru the log. That is more than twice as fast.

Offline rudydubya

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Re: Building a model Drag Saw
« Reply #133 on: September 19, 2018, 08:06:23 PM »
Nicely contrived, Brian.  It was a fun journey following along.

Regards,
Rudy

Offline Ye-Ole Steam Dude

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Re: Building a model Drag Saw
« Reply #134 on: September 19, 2018, 11:26:42 PM »
That new blade eats right through that log.  :ThumbsUp:

Have a great day,
Thomas
Thomas

 

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