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Bandsaw adjustments

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Forum topic by widdle posted 1323 days ago 787 views 0 times favorited 14 replies Add to Favorites Watch
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widdle

1392 posts in 1630 days


1323 days ago

Just recieved a new Grizzly 17’ bandsaw..stoked..Hopefully 2 quick questions.
On the lower bearing adjustments, Is it normal or necassary to have more room for play on the left side of the blade bearing ? blade is centered in the rear support bearing , but not the laterals..?
Second question is..Ive read there is a rule of thumb , 1/4” +- for tension.. Is that with the bearings set ? or backed off ? Thanks..
Sorry about my explanations..pretty green, first bandsaw


14 replies so far

View Steven H's profile

Steven H

1114 posts in 1691 days


#1 posted 1323 days ago

Ship the saw to me and I’ll have it adjust it when I have a chance to do it.

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widdle

1392 posts in 1630 days


#2 posted 1323 days ago

Cool. let me bang out a crate for it. I’ll drive it there myself..

View Lee Barker's profile

Lee Barker

2163 posts in 1481 days


#3 posted 1323 days ago

Can you lift the table off? It sure makes blade adjusting A LOT easier. Remove the knobs on the bottom and it should lift right off.

The guide bearings should be equidistant from the blade. They should not be in contact with the blade. I think the manual may say that a folded dollar bill is a good measuring device for the clearance. Check me on that.

The bearings will have no (sorry) bearing on the tension setting—they should not be touching the blade.

Am I answering your questions?

-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

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widdle

1392 posts in 1630 days


#4 posted 1323 days ago

yes lee thank you.. I pulled the table..The blade is centered on the bearing behind the blade( support bearing ) , but cant center out the guide bearings ( nor the insert). the wheel side bearing i can adjust tight to 3/16” away the other side of the blade i can only get a 1/16” away.. it would be an issue if i put a larger blade in ?

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Steven H

1114 posts in 1691 days


#5 posted 1323 days ago

I just noticed you live near me.
Which grizzly bandsaw do you have?

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widdle

1392 posts in 1630 days


#6 posted 1323 days ago

Good..Shipping should be cheap..Its the 17” with the cast iron.

View richgreer's profile

richgreer

4522 posts in 1705 days


#7 posted 1322 days ago

I just read recently (don’t remember where) that the clearance from the side guide bearings should be the thickness of a piece of paper and the clearance on the back bearing should be the thickness of a playing card.

-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.

View widdle's profile

widdle

1392 posts in 1630 days


#8 posted 1322 days ago

Yes Rich, Thats about what im shooting for. I think they may have just mounted it off at the factory..I’ll try customer service.

View Loren's profile

Loren

7422 posts in 2279 days


#9 posted 1322 days ago

You want the tensioned blade to run without spinning any of the
bearings, ideally. The bearings should engage only when you are
cutting. They are there to counter the force of the wood feeding
against the blade. I set the back thrust bearings about 1/32 behind
the back of the blade, top and bottom. That’s assuming the blade
is tracking consistently when rotated by hand. How you set the side
bearings depends on their relationship to the blade, but the dollar
bill thickness on either side of the blade is a good rule of thumb. It’s
not hard to eyeball it but if you’re near-vision is not too good the
dollar works.

The path of the blade between the two wheels should never be
distorted by pressure from the bearings in any direction when running
under no cutting load. The bearings are there to prevent the blade
twisting or otherwise distorting under load.

-- http://lawoodworking.com

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widdle

1392 posts in 1630 days


#10 posted 1322 days ago

Its the whole assembly that is off..the bottom assemly i guess is mounted off center of the blade not allowing for a thicker 3/4” inch blade . the bearings obviously have adjustments but can only get a max of a playing card on a 1/2” blade. Ill call grizzly , or just slide the whole assembly over , which will throw the table insert off center..no big deal ..just dont want to stare at it for the next twenty years..
thanks all.

View Lee Barker's profile

Lee Barker

2163 posts in 1481 days


#11 posted 1322 days ago

I’m unclear about this. I’m imagining these three bearings are all fit into a cast piece (of aluminum usually) that is bolted to the cast iron frame of the saw. I can’t figure out how you would “slide the whole assembly over.”

I also can’t figure out how the size of the blade, which is a front to back measurement, affects this.

Loren’s post is very good: the blade should not be distorted at all with everything adjusted and at rest.

The business of the table insert: could the table itself be adjusted on its trunnions so the insert would show the blade in its center when all is at rest?

I think we’re all about to be unified in a call for a photo! : )

Kindly,

Lee

-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

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widdle

1392 posts in 1630 days


#12 posted 1322 days ago

“I’m unclear about this. I’m imagining these three bearings are all fit into a cast piece (of aluminum usually) that is bolted to the cast iron frame of the saw. I can’t figure out how you would “slide the whole assembly over.”

Yes lee.. The whole cast piece needs to move..Just a bit of a pain ..after having the whole scene dialed in and the table squared up etc.. Just not too stoked on having to dismantle a brand new saw and re align.

View Steven H's profile

Steven H

1114 posts in 1691 days


#13 posted 1322 days ago

Can you post a picture?

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widdle

1392 posts in 1630 days


#14 posted 1322 days ago

Dont have a camera steven, but i got it figured out…the trunnion (?) assembly was mounted off centered. Re adjusted that and re installed the table and were all good. kinda wierd squaring off a 1/2” blade.but i think were good..Thanks for the help.

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