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Author Topic: Homemade Portables Bandsaw Sawmill Progress And Questions :)  (Read 8646 times)

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Offline Kbeitz

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Re: Homemade Portables Bandsaw Sawmill Progress And Questions :) UPDATED DAILY :)
« Reply #120 on: February 18, 2017, 07:18:51 pm »
Kb, look at a cheap floor jack. Everything you need for a nice hydraulic tensioner. Drill and tap a hole in the right place, screw in a 3000 psi pressure gauge. Look in arnold113's gallery...
How do you know where to drill the hole ?
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Offline Jay Sybrandy

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Re: Homemade Portables Bandsaw Sawmill Progress And Questions :) UPDATED DAILY :)
« Reply #121 on: February 28, 2017, 01:33:30 am »
Would a cheap bottle jack be able to hold that pressure on its side for long periods of time ?
Making large bandsaw sawmill - 15 Years old - NZ

Online boscojmb

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Hi, Whats the standed blade lengths around 5m (200")

Thanks

Hi,
My mill uses 229" bands. I have never had any trouble getting them.

It looks like Cooks uses 202" and 210".

Manufactures in New Zealand may have different standard sizes.

Would a cheap bottle jack be able to hold that pressure on its side for long periods of time ?

Yes, it will. As long as you mount it with the pump side down, so that it can pick up fluid, the jack does not care what position it is in. (With larger mills you need to relieve the tension when you are not sawing.)
You will need to mount a gauge on the jack. Using a caliper and clamps, apply the proper strain to the blade, record the pressure, and apply the same pressure every time you saw.

Folks with smaller mills can get away with leaving tension (strain) on the blade overnight. I have accidentally left strain on my blade overnight on several occasions  and the next day the blade did not make it through the first 15 minutes.  :-\ :-\
John B.

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Offline Jay Sybrandy

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Carriage :

 I cut two pieces of 150 x 50mm (6 x 2 " ) box section 1500mm ( 5ft ) long for my carriage, then put 5mm end caps on them.





Then welded 2 60x10mm with 25mm holes in them for my V wheels



The other side of the wheel mounts unbolt and has a little ledge to hook under my bed so that the carriage can't fall over



I then cut 4 gussets and 2 pieces of box section 2000mm long for my uprights









I  also made 2 slides out of 5 x 50 mm ( 1/4" x 2" ) angle iron and 5mm ( 1/4 " ) plate



I bought a bandsaw blade for $105 from www.bandsaw.co.nz



I decided to use these bigger wheels that have an outside diameter of 700mm ( 27")





I will be able to get a little over 1200mm of cut
Making large bandsaw sawmill - 15 Years old - NZ

Online ljohnsaw

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Re: Homemade Portables Bandsaw Sawmill Progress And Questions :)
« Reply #124 on: April 15, 2017, 11:37:00 am »
With those wheels, you may have issues with set on the blade.  You either need a tire that has a pretty good crown (think round profile) or you may need to cut part of the tread away to make a relief for the teeth. NICE welding.
John

Just North-East of Sacramento...

SkyTrak 9038, Davis Little Monster backhoe, Case 16+4 Trencher, Home Built 38" cut Bandmill up to 64'

Offline york

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Re: Homemade Portables Bandsaw Sawmill Progress And Questions :)
« Reply #125 on: April 15, 2017, 01:32:09 pm »
I also see a problem with using tires-With that wide of a cut,you may have trouble,getting proper tension on your Band...
Albert

Offline Jay Sybrandy

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Re: Homemade Portables Bandsaw Sawmill Progress And Questions :)
« Reply #126 on: April 15, 2017, 04:52:04 pm »
With those wheels, you may have issues with a set on the blade.  You either need a tire that has a pretty good crown (think round profile) or you may need to cut part of the tread away to make a relief for the teeth. NICE welding.

I probably will grind a little out for the teeth and I am also running my drive belt on my tire as well because I can find a 27" pulley.

Thanks, I don't know about "Nice Welding" But they will hold


I also see a problem with using tires-With that wide of a cut, you may have trouble, getting proper tension on your Band...

I was thinking that but I'm just hoping that I can.
Making large bandsaw sawmill - 15 Years old - NZ

Online ljohnsaw

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Re: Homemade Portables Bandsaw Sawmill Progress And Questions :)
« Reply #127 on: April 15, 2017, 06:29:12 pm »
Thanks, I don't know about "Nice Welding" But they will hold

Welding thin wall stock is a real challenge for me.  Either it comes out pretty good or I blow through it.  Usually the latter.
John

Just North-East of Sacramento...

SkyTrak 9038, Davis Little Monster backhoe, Case 16+4 Trencher, Home Built 38" cut Bandmill up to 64'

Offline Kbeitz

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Re: Homemade Portables Bandsaw Sawmill Progress And Questions :)
« Reply #128 on: April 15, 2017, 09:01:33 pm »
Thanks, I don't know about "Nice Welding" But they will hold

Welding thin wall stock is a real challenge for me.  Either it comes out pretty good or I blow through it.  Usually the latter.

Try a 1/16" rod...
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Online ljohnsaw

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Re: Homemade Portables Bandsaw Sawmill Progress And Questions :)
« Reply #129 on: April 15, 2017, 09:56:20 pm »
Actually, I picked up some 3/32" stainless to work on some 1/8" stainless sheet for a sailboat rudder project.  I used a few sticks to weld on some hinges to some thin tube stock.  Worked pretty well.  Then I found in my stash some 1/16" and found it worked pretty well on thin wall.  I had to dial my Lincoln welder to the lowest setting - 60 amps.  It was just barely hot enough to flow well.  I bumped it up to 75 and all it would do is just melt the rod - poof - limp spaghetti!
John

Just North-East of Sacramento...

SkyTrak 9038, Davis Little Monster backhoe, Case 16+4 Trencher, Home Built 38" cut Bandmill up to 64'

Offline Kbeitz

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Re: Homemade Portables Bandsaw Sawmill Progress And Questions :)
« Reply #130 on: April 15, 2017, 10:10:43 pm »
I like to burn them hot. I use 1/2 a rod and put it down for a new one.
After it cools I finish it up.
Collector and builder of many things.
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Offline Jay Sybrandy

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Re: Homemade Portables Bandsaw Sawmill Progress And Questions :)
« Reply #131 on: April 17, 2017, 04:54:44 am »
This box section isn't too thin it 3mm (1/8") its as about as thin as I can neatly weld without too many holes :)
Making large bandsaw sawmill - 15 Years old - NZ

Offline Jay Sybrandy

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Re: Homemade Portables Bandsaw Sawmill Progress And Questions :)
« Reply #132 on: April 24, 2017, 05:01:49 am »
I backed my trailer part of my mill into the shed to work on my carriage



I then cut and notched a bit of box section for the top then welded it in



This was my first attempt at upside down welding (MIG)



I welded 2 braces onto the bottom and 2 on top to hold it while welding.



Lifted it off then welding in 2 corner braces





I then setup my saw head to weld in 



I then made 2 gussets out of 5mm plate and welded them in





I have decided to use larger 6 stud wheels that are 700mm ( 27" ish ) outside butI have already welded stubs to a shaft for hubs that I have, so I need to make some hub spaces.

I started by cutting 2 200mm (8") out of 12mm plate



Our circle cutting jig for out plasma couldn't go down small enough so I had to free hand them. To true them up I drilled a 16mm hole in the center and held it on a piece of threaded rod on our "New Lathe"





I then bored the middle out to be a tight fit on the hub and then drilled 10 holes 4 to line up with my hubs and 6 to line up with my rims



I then turned a lip to be a tight fit on the inside of my rim



I then drilled my hole out to 14mm then tapped them to M16 and cut then cut 20 pieces of M16 rod 40mm for stubs







I also made 2 pulleys for my lifting my saw head



For my adjusting wheel, I made a slide out of 5mm plate





Then made a mounting plate to hold my wheel with u bolts (I made those holes into slots)






Making large bandsaw sawmill - 15 Years old - NZ

Offline Kbeitz

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Re: Homemade Portables Bandsaw Sawmill Progress And Questions :)
« Reply #133 on: April 24, 2017, 07:57:46 am »
Lookin good...
Collector and builder of many things.
I have a
machine shop
Wood work shop
And a Weld shop
And now a saw mill
and a bunch of new forum friends.