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Forum topic by daddywoofdawg posted 04-06-2015 01:18 PM 1173 views 0 times favorited 13 replies Add to Favorites Watch
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1006 posts in 997 days

04-06-2015 01:18 PM

A person I met asked me this question,and my thoughts haven’t helped any Ideas?
He writes: I bought an older delta 14” bandsaw. 1750 1/2 motor. My issue is, I’ve only been able to get the Bosch blades from lowes for my saw. I’ve set the saw up properly blade guides and such set. They saw will just not cut easily I have to push the material. I put a brand new blade on yesterday. Straight out of the box. I took a scrap piece of pine 2×2 and have to force it for it to cut. Im wondering if my tpms aren’t enough? Are the Bosch blades just that bad? Help, advice please.

13 replies so far

View NoThanks's profile


798 posts in 951 days

#1 posted 04-06-2015 01:30 PM

In your second pic it looks like all the tips on the blade are rounded off.
Double check your set up to make sure the blade isn’t hitting something causing it.

-- Because I'm gone, that's why!

View MrUnix's profile


4039 posts in 1621 days

#2 posted 04-06-2015 01:30 PM

Never used Bosch blades… but the motor RPM is meaningless without knowing the pulley diameters. Standard size on older Deltas was a 2.75” (part #5275) motor pulley and an 8” (part #5800) lower wheel pulley. Sometime in the 70’s IIRC, they switched to a 6” wheel pulley.

With a 1725 rpm motor, the older pulley setup gives you about 2200 SFPM.
With the newer pulley setup, you get about 2900 SFPM.
You should not exceed about 3000 SFPM.

FYI: I have a 1950 Delta 14” with a 1/2hp 1725 motor and the original 2.75/8” pulley setup. I have never had a problem cutting anything, including resawing ~5” live oak, which is pretty tough stuff.


PS: the pulley setup looks good, but the blade doesn’t look to be in all that good of shape. Make sure the thrust bearing is set so the gullets never go past the guide blocks… nothing will dull a blade faster than having them running into the guides.

-- Brad in FL - To be old and wise, you must first be young and stupid

View BinghamtonEd's profile


2263 posts in 1792 days

#3 posted 04-06-2015 02:12 PM

I have an old (1984) Delta 14” bandsaw, and I started off with 2 different size Bosch blades. Then later on I switched to Timberwolf. The difference was night and day. The Timberwolf blades sliced through walnut, cherry and oak without having to force the blade through. This is not a plug for Timberwolf, they’re just what I use and they’re good blades. There are several other brands that others will suggest that will perform well.

Ditch the Bosch blades. And make sure the bearings/guides/tension is set up properly.

-- - The mightiest oak in the forest is just a little nut that held its ground.

View daddywoofdawg's profile


1006 posts in 997 days

#4 posted 04-06-2015 02:12 PM

That’s what I thought too.that the blade was rubbing on something, he said he didn’t see where it was.
I also thought the blade was upside down but the pictures show that isn’t so.
the pulley wheels are 8” and 3”.
said it got worst after the blade change.
Thought maybe the belt was slipping too,but said no belt slipping sound.(think fan belt slipping)
I told him to get a timberwolf too.I bought 2 and It does make my craftsman saw like a real saw.

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3972 posts in 1774 days

#5 posted 04-06-2015 02:33 PM

It looks to me that the blade is quite dull. Perhaps it rubs on the blade guard and the first revolution ruined the blade.

-- Bondo Gaposis

View hotbyte's profile


826 posts in 2398 days

#6 posted 04-06-2015 02:43 PM

in the second picture, the tips of the teeth seem to have a definite shine to them like rubbing on something…

View johnstoneb's profile (online now)


2105 posts in 1595 days

#7 posted 04-06-2015 03:01 PM

There is nothing wrong with the Bosch blades. There are better blades available but they will still cut new.
In your pictures that blade looks like it has been overheated and some of the teeth have been bent and all of them look rounded over. You need to go back and check your setup and then look for nails or something else in what your trying to cut. That definitely doesn’t look like a new blade.

-- Bruce, Boise, ID

View DrDirt's profile


4143 posts in 3165 days

#8 posted 04-06-2015 03:03 PM

That blade is trashed… not sure what it looked like in the package.

Maybe this is rubbing on the metal throat plate that is “removing” the sharpness immediately.

-- 'Political correctness is fascism pretending to be manners' ~George Carlin

View OSU55's profile


1039 posts in 1412 days

#9 posted 04-06-2015 04:17 PM

How easily does the blade/wheels move by hand, and how quickly do they stop? When rotated by hand are there any grinding/contact noises?

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4143 posts in 3165 days

#10 posted 04-06-2015 06:57 PM

How easily does the blade/wheels move by hand, and how quickly do they stop? When rotated by hand are there any grinding/contact noises?

- OSU55

I can open the top of my Delta 14 inch and put one finger in the spoke the spin the wheel round and round.

I have the cool blocks – and so I set them where they do touch the blade, but I hear no grinding but a bit of a his as the block rubs.

As a note – after cutting, i can touch the blade and it is maybe luke warm to the touch, so no friction/heat build even after cutting with it.

I also have a brush that is clearing sawdust off the bottom wheel – so it can make a little sound as well.

Mine is from carter…. I have seen toothbrushes mounted with handles cut off, and other brushes.
This was Cheap and ‘path of least resistance’
I put it on when I added a riser block.

-- 'Political correctness is fascism pretending to be manners' ~George Carlin

View oluf's profile


260 posts in 2461 days

#11 posted 04-18-2015 04:30 AM

Is there a chance that the motor is running backwards. That would account for poor cutting and blade damage.

-- Nils, So. Central MI. Wood is honest.Take the effort to understand what it has to tell you before you try to change it.

View AlaskaGuy's profile


2397 posts in 1731 days

#12 posted 04-19-2015 05:54 AM

I did a search on Bosch blades and found quite a few complaints on those blades. It not what I though I’d find since Bosch generally made decent “stuff”.

-- Alaskan's for Global warming!

View distrbd's profile


2220 posts in 1869 days

#13 posted 04-19-2015 03:10 PM

If a new blade does not fix the problem,I would check if the tires are loose or not,loose tires can slip on the wheels which would give the same symptoms you were describing.

-- Ken from Ontario, Canada

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