3 Attachment(s)
Outboard Support; Horizontal Bandsaw
My employer builds machinery for baking industry on weldments of .180 wall 1.5 x 3 rectangular tubing. Our machine tools are on modest side. The builders/ mechanics are good on projects; on shop machinery not so inclined. 16 gauge hydraulic shear reportedly wouldn't cut square over it's 48" width, I hadn't used it yet. Now, I needed a smaller 2' x 3' of stainless, a good time for a test. Pulled out a larger remnant with a factory edge on the long side, and did a narrow trim with that edge on fence. Yep, not square. Helllooo, thrust washers aren't snug to blade carrier with the holddown OR wide enough for the slots. Literally scooted away from shear edge with descent of blade, pulling material along with it...So made a couple aluminum spacers, flanked by hard washers under new bolts and a bronze thrust washers riding the holddown. No lightning, thunderclap, apparition, not even fairy dust. IT'S SQUARE NOW! Easy visual check; material against fence, is cut is plumb to shear edge? Check both sides that there isn't some wacky parallelogram going on.
Or the horizontal bandsaw. [shop hand] "...that saw can't cut square". [me] Sure, stand for long material isn't level and parallel with table. [shop hand] "Oh". [me]....and the roller's bearings fall out, there are four flat legs on the floor, and the upright isn't vertical, wanna bet on what is wrong?
Yes, that description is copied from my "Miter Datumizer" of a couple days prior. A new company, I spend a lot of time shaking out illogical conditions. I'll never understand how whatever verbal exchanges are made at hiring; some people don't practice what they've learned over the years for tasks, only used as ammunition to land a job.
I use definite, tactical methods to get things done; not fast, maybe not best, but right. "Right" has a lot of leeway. Looked over our material, visualizing combinations offering a solid solution.
Here is the result. Frame is 1/8" x 1 3/4" x 1 3/4" angle, spreaders 1/4" x 1", roller is .187 wall x 2" x 16" tubing plugged with cold rolled steel about a 1 1/2" deep, bronze bushings on 5/8" shaft, vertical adjustment by 2 lengths of 1"-8 TPI all-thread and square nuts, attached to roller supports of 2" x 3" angle. This shown in the extended position, before leveling. Angles cut are all 15 or 90, the feet contact floor 100%. Roller and supports built first, to gauge final height and adjustment desired, before cutting legs. We handle some rather heavy stock, wimpy yoke style support was NOT my goal.
Attachment 22387
Shaft is captive by 10-32 machine screws at each end. One plug is press fit, slip fit on the other to make bushing replacement easier, as entire roller assembly slips free from the frame. Using two nuts on washers allow leveling in the Y axis after X is corrected.
Attachment 22388
After setting, I dropped a chalkline to represent fixed jaw of saw, so as distance from saw varies, the flat and level planes remain close to correct. It's hidden by shadow in pic, visible by operator though.
Attachment 22389
This all makes repeated cuts dependable; all pieces now so square, facing or profile milling is eliminated or reduced.
4 Attachment(s)
The saga continues. Horizontal Bandsaw Support, chapter II
Horizontal Bandsaw Support; Part II.
As described above, our cutting operation needed attention. The heavy support came to be in use immediately, on project that triggered design and build of it. Knew a secondary stand would be important for feeding long stock and/ or those on the cut side. Existing spare support used to be of HFT design and manufacture, all know how long [short] that continues. HMT.net holds plenty of our re-engineering creations for that company.
At 26" minimum it was still too high for the import horizontal bandsaw. Not any more!
Attachment 22725
By sectioning both legs, it's now about 20" minimum, with roller in place.
Attachment 22722 Of thin square tubing, re-machining didn't look promising or all that worthwhile. The sections were welded back on; alongside the outer face of the legs, almost no effort expended.
Attachment 22723 'Feet' re-attached in same manner as before. You might mock up first, and find amount to bevel legs.
Their design has a 'clever' [?] accommodation, connecting down tube legs with crossed tube 'feet'. 2 small lengths of 10mm round stock are used in both joints. 1 is drilled through 6mm, the other tapped likewise. Drilled one creates a seat for cap screw, when placed in round tube 'foot', which is drilled through clearance size of cap screw head. Tapped one sits in a cross drilled hole of square tube above a radiused seat for round side. Sorry; picture's worth 1000 words, but none of us have X-ray vision.
Attachment 22724
Tip 1. Tack tubes assembled and with stand upright; insure all four rubber caps will actually touch floor. I only did so partially tightened, had to massage positions afterward.
Once welds were complete, that showed excess of the roller post adjustment that could be removed to get below deck height of saw.
Tip 2. Be prepared to modify saw base now too; very light weight and entirely inadequate leveling hardware.
I'll post that next, in this thread. It's 2300, I'm up at 0440.
3 Attachment(s)
As if I & II weren't enough; Horizontal Bandsaw Support, chapter III
Continued, Horizontal Bandsaw Support; Part II.
Tip 2. Be prepared to modify saw base also; very light weight and entirely inadequate leveling hardware.
:popcorn::popcorn::popcorn:
The saw department, of which all of you are now intimately familiar, machine has a cast table and saw frame, bolted to a formed sheet metal stand. While I've presented this out of order, they depend on each other to produce cuts that satisfy me.
This all started, trying to manipulate heavy material into the saw and get a square cut.
Well, it wasn't leveling out.
Well, I'll level it. Combined weight of saw [300 lbs.] and material wouldn't have it! :angry: The nerve!
Despite careful work with accurate bubble level and wrenches, changes were not registering......not well at all.
Shouldn't 4 individual leveling pads threaded 3/8-16, be sufficient to lift combined weight, yes? Yeah, if threaded portion of the base is sturdy, which decidedly is NOT! It looks like 16 gauge....[maybe 18 gauge material and 2 equivalent gauges of textured paint, lol]. The so called threads were pierced into the sheetmetal, not even a welded nut! So, jacking the levelers only deformed the lower structure, nice.
So job went on hold whilst fixing what should have been built into a "Professional Series" machine. Maybe they'd best spend on a decent cabinet instead of a fancy plaque. An embossed raging bear doesn't impress me at all; proper design/ hardware does.
My solution isn't going to make the machinery company jealous, but might direct a little extra profit towards my employer with efficiency and better utilized materials. As with most smaller horizontal bandsaws, there are 2 wheels, 2 leveling pads, and a handle for trundling it around. Sometimes we get big machines in and have to adjust the floor plan for room to work; meaning the wheels should be retained. They're on a solid axle and no means of leveling, countering ability of 2 leveling pads in front.
So this now has a 'suspension' for lack of a better term, not sprung, but can be leveled.
Attachment 22733 The vertical square tube is slotted, the hex bolt bears on a slug of round stock [fitted inside square tube] drilled to admit the axle. After bolting assembly to underside, I sat front end on a short heavy pipe laying on it's side. That allowed getting the plane level across the saw table [perpendicular to blade] front being able to rock right or left.
Attachment 22734
Next, attached spreader to underside with leveling pads and finished leveling long wise. Attachment 22735
Now I had a measurable height and 2 level axis to produce outboard supports.
The End:clapping::clapping::clapping:
Speaking of embossed plaques and such nonsense.
When machine tools [and companies in general] carried names of people, that signaled confidence, endurance and well earned pride. Some still do. LeBlond, Lodge & Shipley, DeVleig, Pratt & Whitney, Cleereman, Gisholt, Gray, Peck-Stow-Wilcox, Sundstrand, Kearney & Trecker, Moore, Hardinge, Brown & Sharpe, Taft & Peirce, Niles, Bennett, Pond, Bullard, A. Herbert, Warner & Swazey...warning! rabbit hole! https://en.wikipedia.org/wiki/Catego..._tool_builders
One more treat, HMT.net friends, little bit of Johnny Cash. Heavy Metal (Don't Mean Rock and Roll to Me) Google that phrase.
